%% %% %CopyrightBegin% %% %% Copyright Ericsson AB 2004-2014. All Rights Reserved. %% %% The contents of this file are subject to the Erlang Public License, %% Version 1.1, (the "License"); you may not use this file except in %% compliance with the License. You should have received a copy of the %% Erlang Public License along with this software. If not, it can be %% retrieved online at http://www.erlang.org/. %% %% Software distributed under the License is distributed on an "AS IS" %% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See %% the License for the specific language governing rights and limitations %% under the License. %% %% %CopyrightEnd% %% %%%---------------------------------------------------------------- %%% Purpose:Test Suite for the 'qlc' module. %%%----------------------------------------------------------------- -module(qlc_SUITE). -define(QLC, qlc). -define(QLCs, "qlc"). %-define(debug, true). %% There are often many tests per testcase. Most tests are copied to a %% module, a file. The file is compiled and the test run. Should the %% test fail, the module file is not removed from ?privdir, but is %% kept for inspection. The name of the file is %% ?privdir/qlc_test_CASE.erl. -define(TESTMODULE, qlc_test). -define(TESTCASE, testcase_name). -ifdef(debug). -define(line, put(line, ?LINE), ). -define(config(X,Y), foo). -define(datadir, ?QLCs ++ "_SUITE_data"). -define(privdir, ?QLCs ++ "_SUITE_priv"). -define(testcase, current_testcase). % don't know -define(t, test_server). -else. -include_lib("test_server/include/test_server.hrl"). -define(datadir, ?config(data_dir, Config)). -define(privdir, ?config(priv_dir, Config)). -define(testcase, ?config(?TESTCASE, Config)). -endif. -include_lib("stdlib/include/ms_transform.hrl"). -export([all/0, suite/0,groups/0,init_per_suite/1, end_per_suite/1, init_per_group/2,end_per_group/2, init_per_testcase/2, end_per_testcase/2]). -export([ badarg/1, nested_qlc/1, unused_var/1, lc/1, fun_clauses/1, filter_var/1, single/1, exported_var/1, generator_vars/1, nomatch/1, errors/1, pattern/1, eval/1, cursor/1, fold/1, eval_unique/1, eval_cache/1, append/1, evaluator/1, string_to_handle/1, table/1, process_dies/1, sort/1, keysort/1, filesort/1, cache/1, cache_list/1, filter/1, info/1, nested_info/1, lookup1/1, lookup2/1, lookup_rec/1, indices/1, pre_fun/1, skip_filters/1, ets/1, dets/1, join_option/1, join_filter/1, join_lookup/1, join_merge/1, join_sort/1, join_complex/1, otp_5644/1, otp_5195/1, otp_6038_bug/1, otp_6359/1, otp_6562/1, otp_6590/1, otp_6673/1, otp_6964/1, otp_7114/1, otp_7238/1, otp_7232/1, otp_7552/1, otp_6674/1, otp_7714/1, otp_11758/1, manpage/1, backward/1, forward/1, eep37/1]). %% Internal exports. -export([bad_table_throw/1, bad_table_exit/1, default_table/1, bad_table/1, bad_table_format/1, bad_table_format_arity/1, bad_table_traverse/1, bad_table_post/1, bad_table_lookup/1, bad_table_max_lookup/1, bad_table_info_arity/1, bad_table_info_fun_n_objects/1, bad_table_info_fun_indices/1, bad_table_info_fun_keypos/1, bad_table_key_equality/1]). -export([evaluator_2/2]). -export([prep_scratchdir/1, truncate_tmpfile/2, crash/2, crash_tmpfile/2]). -export([etsc/2, etsc/3, create_ets/2, lookup_keys/1]). -export([strip_qlc_call/1, join_info/1, join_info_count/1]). -export([i/1, i/2, format_info/2]). -export([table_kill_parent/2, table_parent_throws/2, table_parent_exits/2, table_bad_parent_fun/2]). -export([table/2, table/3, stop_list/2, table_error/2, table_error/3, table_lookup_error/1]). %% error_logger -export([install_error_logger/0, uninstall_error_logger/0, read_error_logger/0]). -export([init/1, handle_event/2, handle_call/2, handle_info/2, terminate/2]). % Default timetrap timeout (set in init_per_testcase). -define(default_timeout, ?t:minutes(5)). init_per_testcase(Case, Config) -> ?line Dog = ?t:timetrap(?default_timeout), [{?TESTCASE, Case}, {watchdog, Dog} | Config]. end_per_testcase(_Case, _Config) -> Dog = ?config(watchdog, _Config), test_server:timetrap_cancel(Dog), ok. suite() -> [{ct_hooks,[ts_install_cth]}]. all() -> [{group, parse_transform}, {group, evaluation}, {group, table_impls}, {group, join}, {group, tickets}, manpage, {group, compat}]. groups() -> [{parse_transform, [], [badarg, nested_qlc, unused_var, lc, fun_clauses, filter_var, single, exported_var, generator_vars, nomatch, errors, pattern]}, {evaluation, [], [eval, cursor, fold, eval_unique, eval_cache, append, evaluator, string_to_handle, table, process_dies, sort, keysort, filesort, cache, cache_list, filter, info, nested_info, lookup1, lookup2, lookup_rec, indices, pre_fun, skip_filters, eep37]}, {table_impls, [], [ets, dets]}, {join, [], [join_option, join_filter, join_lookup, join_merge, join_sort, join_complex]}, {tickets, [], [otp_5644, otp_5195, otp_6038_bug, otp_6359, otp_6562, otp_6590, otp_6673, otp_6964, otp_7114, otp_7232, otp_7238, otp_7552, otp_6674, otp_7714, otp_11758]}, {compat, [], [backward, forward]}]. init_per_suite(Config) -> Config. end_per_suite(_Config) -> ok. init_per_group(_GroupName, Config) -> Config. end_per_group(_GroupName, Config) -> Config. badarg(doc) -> "Badarg."; badarg(suite) -> []; badarg(Config) when is_list(Config) -> Ts = [{badarg, <<"-import(qlc, [q/1, q/2]). q(_, _, _) -> ok. badarg() -> qlc:q(foo), qlc:q(foo, cache_all), qlc:q(foo, cache_all, extra), q(bar), q(bar, cache_all), q(bar, cache_all, extra). ">>, [], {errors,[{5,?QLC,not_a_query_list_comprehension}, {6,?QLC,not_a_query_list_comprehension}, {8,?QLC,not_a_query_list_comprehension}, {9,?QLC,not_a_query_list_comprehension}], []}}], ?line [] = compile(Config, Ts), ok. nested_qlc(doc) -> "Nested qlc expressions."; nested_qlc(suite) -> []; nested_qlc(Config) when is_list(Config) -> %% Nested QLC expressions. X is bound before the first one; Z and X %% before the second one. Ts = [{nested_qlc1, <<"nested_qlc() -> X = 3, % X unused Q = qlc:q([Y || X <- % X shadowed begin Z = 3, qlc:q([Y || Y <- [Z], X <- [1,2,3], % X shadowed X < Y]) end, Y <- [y], Y > X]), [y, y] = qlc:e(Q), ok. ">>, [warn_unused_vars], {warnings,[{{2,15},erl_lint,{unused_var,'X'}}, {{4,29},erl_lint,{shadowed_var,'X',generate}}, {{8,49},erl_lint,{shadowed_var,'X',generate}}]}}, {nested_qlc2, <<"nested_qlc() -> H0 = qlc:append([a,b], [c,d]), qlc:q([{X,Y} || X <- H0, Y <- qlc:q([{X,Y} || X <- H0, % X shadowed Y <- H0])]), ok. ">>, [warn_unused_vars], {warnings,[{{6,39},erl_lint,{shadowed_var,'X',generate}}]}} ], ?line [] = compile(Config, Ts), ok. unused_var(doc) -> "Unused variable with a name that should not be introduced."; unused_var(suite) -> []; unused_var(Config) when is_list(Config) -> Ts = [{unused_var, <<"unused_var() -> qlc:q([X || begin Y1 = 3, true end, % Y1 unused Y <- [1,2,3], X <- [a,b,c], X < Y]). ">>, [warn_unused_vars], {warnings,[{{2,33},erl_lint,{unused_var,'Y1'}}]}}], ?line [] = compile(Config, Ts), ok. lc(doc) -> "Ordinary LC expression."; lc(suite) -> []; lc(Config) when is_list(Config) -> Ts = [{lc, <<"lc() -> [X || X <- [], X <- X]. % X shadowed ">>, [], {warnings,[{{2,30},erl_lint,{shadowed_var,'X',generate}}]}}], ?line [] = compile(Config, Ts), ok. fun_clauses(doc) -> "Fun with several clauses."; fun_clauses(suite) -> []; fun_clauses(Config) when is_list(Config) -> Ts = [{fun_clauses, <<"fun_clauses() -> {X,X1,X2} = {1,2,3}, F = fun({X}) -> qlc:q([X || X <- X]); % X shadowed (fun, generate) ([X]) -> qlc:q([X || X <- X]) % X shadowed (fun, generate) end, {F,X,X1,X2}. ">>, [], {warnings,[{{3,22},erl_lint,{shadowed_var,'X','fun'}}, {{3,41},erl_lint,{shadowed_var,'X',generate}}, {{4,22},erl_lint,{shadowed_var,'X','fun'}}, {{4,41},erl_lint,{shadowed_var,'X',generate}}]}}], ?line [] = compile(Config, Ts), ok. filter_var(doc) -> "Variable introduced in filter."; filter_var(suite) -> []; filter_var(Config) when is_list(Config) -> Ts = [{filter_var, <<"filter_var() -> qlc:q([X || Y <- [X || X <- [1,2,3]], begin X = Y, true end]). ">>, [], []}, {unsafe_filter_var, <<"unsafe_filter_var() -> qlc:q([{X,V} || X <- [1,2], case {a} of {_} -> true; V -> V end]). ">>, [], {errors,[{{2,25},erl_lint,{unsafe_var,'V',{'case',{3,19}}}}],[]}}], ?line [] = compile(Config, Ts), ok. single(doc) -> "Unused pattern variable."; single(suite) -> []; single(Config) when is_list(Config) -> Ts = [{single, <<"single() -> qlc:q([X || {X,Y} <- [{1,2}]]), % Y unused qlc:q([[] || [] <- [[]]]). ">>, [warn_unused_vars], {warnings,[{{2,30},erl_lint,{unused_var,'Y'}}]}}], ?line [] = compile(Config, Ts), ok. exported_var(doc) -> "Exported variable in list expression (rhs of generator)."; exported_var(suite) -> []; exported_var(Config) when is_list(Config) -> Ts = [{exported_var, <<"exported() -> qlc:q([X || X <- begin case foo:bar() of 1 -> Z = a; 2 -> Z = b end, [Z = 3, Z = 3] % Z exported (twice...) end ]). ">>, [warn_export_vars], {warnings,[{{7,37},erl_lint,{exported_var,'Z',{'case',{3,36}}}}, {{7,44},erl_lint,{exported_var,'Z',{'case',{3,36}}}}]}}], ?line [] = compile(Config, Ts), ok. generator_vars(doc) -> "Errors for generator variable used in list expression."; generator_vars(suite) -> []; generator_vars(Config) when is_list(Config) -> Ts = [{generator_vars, <<"generator_vars() -> qlc:q([X || Z <- [1,2], X <- begin case 1 of 1 -> Z = a; % used_generator_variable 2 -> Z = b % used_generator_variable end, [Z = 3, Z = 3] % used_generator_variable (2) end ]). ">>, [], {errors,[{{6,41},?QLC,{used_generator_variable,'Z'}}, {{7,41},?QLC,{used_generator_variable,'Z'}}, {{9,33},?QLC,{used_generator_variable,'Z'}}, {{9,40},?QLC,{used_generator_variable,'Z'}}], []}}], ?line [] = compile(Config, Ts), ok. nomatch(doc) -> "Unreachable clauses also found when compiling."; nomatch(suite) -> []; nomatch(Config) when is_list(Config) -> Ts = [{unreachable1, <<"unreachable1() -> qlc:q([X || X <- [1,2], case X of true -> false; true -> true % clause cannot match end]). ">>, [], {warnings,[{5,v3_kernel,{nomatch_shadow,4}}]}}, {nomatch1, <<"generator1() -> qlc:q([3 || {3=4} <- []]). ">>, [], {warnings,[{{2,27},qlc,nomatch_pattern}]}}, {nomatch2, <<"nomatch() -> etsc(fun(E) -> Q = qlc:q([3 || {3=4} <- ets:table(E)]), [] = qlc:eval(Q), false = lookup_keys(Q) end, [{1},{2}]). ">>, [], {warnings,[{{3,33},qlc,nomatch_pattern}]}}, {nomatch3, <<"nomatch() -> etsc(fun(E) -> Q = qlc:q([{A,B,C,D} || A=B={C=D}={_,_} <- ets:table(E)]), [] = qlc:eval(Q), false = lookup_keys(Q) end, [{1,2},{2,3}]). ">>, [], {warnings,[{{3,52},qlc,nomatch_pattern}]}}, {nomatch4, <<"nomatch() -> etsc(fun(E) -> Q = qlc:q([{X,Y} || {<<X>>} = {<<Y>>} <- ets:table(E)]), [] = qlc:eval(Q), false = lookup_keys(Q) end, [{<<34>>},{<<40>>}]). ">>, [], {errors,[{{3,48},erl_lint,illegal_bin_pattern}],[]}}, {nomatch5, <<"nomatch() -> etsc(fun(E) -> Q = qlc:q([t || {\"a\"++\"b\"} = {\"ac\"} <- ets:table(E)]), [t] = qlc:eval(Q), [\"ab\"] = lookup_keys(Q) end, [{\"ab\"}]). ">>, [], {warnings,[{3,v3_core,nomatch}]}} ], ?line [] = compile(Config, Ts), ok. errors(doc) -> "Errors within qlc expressions also found when compiling."; errors(suite) -> []; errors(Config) when is_list(Config) -> Ts = [{errors1, <<"errors1() -> qlc:q([X || X <- A]). % A unbound ">>, [], {errors,[{{2,33},erl_lint,{unbound_var,'A'}}],[]}}], ?line [] = compile(Config, Ts), ok. pattern(doc) -> "Patterns."; pattern(suite) -> []; pattern(Config) when is_list(Config) -> Ts = [ <<"%% Records in patterns. No lookup. L = [#a{k=#k{v=91}}], H = qlc:q([Q || Q = #a{k=#k{v=91}} <- qlc_SUITE:table(L, 2, [])]), {qlc,_,[{generate,_,{table,{call,_,_,_}}}], []} = i(H), L = qlc:e(H), {call, _, _q, [{lc,_,{var,_,'Q'}, [{generate,_, {match,_,_,_}, {call,_,_,_}}]}]} = i(H, {format,abstract_code})">>, <<"%% No matchspec since there is a binary in the pattern. etsc(fun(E) -> Q = qlc:q([A || {<<A:3/unit:8>>} <- ets:table(E)]), [_] = qlc:eval(Q), {qlc,_,[{generate,_,{table,_}}], []} = i(Q) end, [{<<\"hej\">>}])">> ], ?line run(Config, <<"-record(a, {k,v}). -record(k, {t,v}).\n">>, Ts), ok. eval(doc) -> "eval/2"; eval(suite) -> []; eval(Config) when is_list(Config) -> ScratchDir = filename:join([?privdir, "scratch","."]), Ts = [<<"{'EXIT',{badarg,_}} = (catch qlc:eval(not_a_qlc)), H = qlc:q([X || X <- [1,2]]), {'EXIT',{{unsupported_qlc_handle,{qlc_handle,foo}},_}}= (catch qlc:e({qlc_handle,foo})), {'EXIT',{badarg,_}} = (catch qlc:eval(H, [{unique_all,badarg}])), {'EXIT',{badarg,_}} = (catch qlc:eval(H, [{spawn_options,badarg}])), {'EXIT',{badarg,_}} = (catch qlc:eval(H, [{unique_all,true},{bad,arg}])), {throw,t} = (catch {any_term,qlc:e(qlc:q([X || X <- throw({throw,t})]))}), M = qlc, {'EXIT',{badarg,_}} = (catch M:q(bad))">>, [<<"Dir = \"">>,ScratchDir,<<"\", qlc_SUITE:prep_scratchdir(Dir), E = ets:new(foo, []), [true || I <- lists:seq(1, 50000), not ets:insert(E, {I, I})], H = qlc:q([{X,Y} || Y <- [1,2], X <- qlc:sort(ets:table(E),{tmpdir,Dir}), qlc_SUITE:truncate_tmpfile(Dir, 0)]), R = qlc:eval(H), ets:delete(E), {error,_,{bad_object,_}} = R, \"the tempo\" ++ _ = lists:flatten(qlc:format_error(R))">>], [<<"Dir = \"">>,ScratchDir,<<"\", qlc_SUITE:prep_scratchdir(Dir), E = ets:new(foo, []), Bin = term_to_binary(lists:seq(1,20000)), [true || I <- lists:seq(1, 10), not ets:insert(E, {I, I, Bin})], H = qlc:q([{X,Y} || Y <- [1,2], X <- qlc:sort(ets:table(E),{tmpdir,Dir}), qlc_SUITE:crash_tmpfile(Dir, 5)]), R = qlc:eval(H), ets:delete(E), {error,_,{bad_object,_}} = R">>], <<"E = ets:new(test, []), H = qlc:q([{X,Y} || X <- qlc_SUITE:bad_table_throw(E), Y <- ets:table(E)]), R1 = (catch {any_term,qlc:eval(H, {unique_all,false})}), R2 = (catch {any_term,qlc:eval(H, {unique_all,true})}), ets:delete(E), true = {throw,bad_pre_fun} == R1, true = {throw,bad_pre_fun} == R2">>, <<"E = ets:new(test, []), H = qlc:q([{X,Y} || X <- qlc_SUITE:bad_table_exit(E), Y <- ets:table(E)]), R1 = (catch qlc:eval(H, {unique_all,false})), R2 = (catch qlc:eval(H, {unique_all,true})), ets:delete(E), {'EXIT',{bad_pre_fun,_}} = R1, {'EXIT',{bad_pre_fun,_}} = R2">>, <<"Q = qlc:q([X || X <- [4,3,2,1,0,-1], begin 3/X > 0 end]), {'EXIT',{badarith,_}} = (catch qlc:eval(Q, {unique_all,false})), {'EXIT',{badarith,_}} = (catch qlc:eval(Q, {unique_all,true})) ">>, <<"[1,2] = qlc:eval(qlc:q([X || X <- [1,2]])), [1,2,3,4] = qlc:eval(qlc:append([1,2],[3,4])), [1,2] = qlc:eval(qlc:sort([2,1])), E = ets:new(foo, []), ets:insert(E, [{1},{2}]), [{1},{2}] = lists:sort(qlc:eval(ets:table(E))), true = ets:delete(E)">>, <<"H = qlc:q([X || X <- [1,2], begin F = fun() -> qlc:e(qlc:q([Y || Y <- [1,2]])) end, F() == (fun f/0)() end]), [1,2] = qlc:e(H), ok. f() -> [1,2]. foo() -> bar">>, <<"C1_0_1 = [1,2], %% The PT cannot rename C to C1_0_1; another name is chosen. [1,2] = qlc:eval(qlc:q([C || C <- C1_0_1]))">>, <<"H = qlc:q([X || {X,X} <- [{1,a},{2,2},{b,b},{3,4}]]), [2,b] = qlc:e(H), H1 = qlc:q([3 || {X,X} <- [{1,a},{2,2},{b,b},{3,4}]]), [3,3] = qlc:e(H1)">>, %% Just to cover a certain line in qlc.erl (avoids returning []) <<"E = ets:new(foo, []), Bin = term_to_binary(lists:seq(1,20000)), [true || I <- lists:seq(1, 10), not ets:insert(E, {I, I, Bin})], H = qlc:q([{X,Y} || Y <- [1,2], X <- qlc:sort(ets:table(E))]), R = qlc:eval(H), ets:delete(E), 20 = length(R)">>, <<"H = qlc:q([{A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W} || {A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W} <- [{a,b,c,d,e,f,g,h,i,j,k,l,m,n,o,p,q,r,s,t,u,v,w}]]), [_] = qlc:e(H)">>, <<"H = qlc:q([Y || Y <- [1,2]], {unique, begin [T] = qlc:e(qlc:q([X || X <- [true]], cache)), T end}), [1,2] = qlc:e(H)">> ], ?line run(Config, Ts), ok. cursor(doc) -> "cursor/2"; cursor(suite) -> []; cursor(Config) when is_list(Config) -> ScratchDir = filename:join([?privdir, "scratch","."]), Ts = [<<"{'EXIT',{badarg,_}} = (catch qlc:cursor(fun() -> not_a_cursor end)), H0 = qlc:q([X || X <- throw({throw,t})]), {throw,t} = (catch {any_term,qlc:cursor(H0)}), H = qlc:q([X || X <- [1,2]]), {'EXIT',{badarg,_}} = (catch qlc:cursor(H,{spawn_options, [a|b]})), {'EXIT',{badarg,_}} = (catch qlc:cursor(H,{bad_option,true}))">>, <<"{'EXIT',{badarg,_}} = (catch qlc:delete_cursor(not_a_cursor))">>, [<<"Dir = \"">>,ScratchDir,<<"\", qlc_SUITE:prep_scratchdir(Dir), % kludge E = ets:new(foo, []), [true || I <- lists:seq(1, 50000), not ets:insert(E, {I, I})], H = qlc:q([{X,Y} || begin put('$qlc_tmpdir', true), true end, Y <- [1,2], X <- qlc:sort(ets:table(E),{tmpdir,Dir}), qlc_SUITE:truncate_tmpfile(Dir, 0)]), C = qlc:cursor(H), R = qlc:next_answers(C, all_remaining), qlc:delete_cursor(C), erase('$qlc_tmpdir'), ets:delete(E), {error,_,{bad_object,_}} = R">>], <<"H1 = qlc:q([X || X <- [1,2]]), C1 = qlc:cursor(H1), [1,2] = qlc:next_answers(C1, all_remaining), [] = qlc:next_answers(C1), [] = qlc:next_answers(C1), ok = qlc:delete_cursor(C1), H2 = qlc:append([1,2],[3,4]), C2 = qlc:cursor(H2), [1,2,3,4] = qlc:next_answers(C2, all_remaining), ok = qlc:delete_cursor(C2), H3 = qlc:sort([2,1]), C3 = qlc:cursor(H3), [1,2] = qlc:next_answers(C3, all_remaining), ok = qlc:delete_cursor(C3), E = ets:new(foo, []), ets:insert(E, [{1},{2}]), H4 = ets:table(E), C4 = qlc:cursor(H4), [{1},{2}] = lists:sort(qlc:next_answers(C4, all_remaining)), ok = qlc:delete_cursor(C4), true = ets:delete(E)">>, <<"H = qlc:q([{X,Y} || X <- [1,2], Y <- [a,b]]), C = qlc:cursor(H, []), [{1,a},{1,b}] = qlc:next_answers(C, 2), [{2,a}] = qlc:next_answers(C, 1), [{2,b}] = qlc:next_answers(C, all_remaining), {'EXIT',{badarg,_}} = (catch qlc:next_answers(C, -1)), P = self(), Pid1 = spawn_link(fun() -> {'EXIT',{not_cursor_owner,_}} = (catch qlc:delete_cursor(C)), P ! {self(), done} end), Pid2 = spawn_link(fun() -> {'EXIT',{not_cursor_owner,_}} = (catch qlc:next_answers(C)), P ! {self(), done} end), receive {Pid1, done} -> ok end, receive {Pid2, done} -> ok end, ok = qlc:delete_cursor(C), {'EXIT',{badarg,_}} = (catch qlc:next_answers(not_a_cursor)), ok = qlc:delete_cursor(C)">>, <<"Q = qlc:q([X || X <- [1,2,1,2,1]]), C1 = qlc:cursor(Q, [{unique_all,true}]), [1,2] = qlc:next_answers(C1, all_remaining), ok = qlc:delete_cursor(C1), C2 = qlc:cursor(Q, [{unique_all,true}]), [1,2] = qlc:next_answers(C2, all_remaining), ok = qlc:delete_cursor(C2)">>, <<"Q = qlc:q([X || X <- [1,2,1,2,1]]), C1 = qlc:cursor(Q, [{unique_all,true},{spawn_options, []}]), [1,2] = qlc:next_answers(C1, all_remaining), ok = qlc:delete_cursor(C1), C2 = qlc:cursor(Q, [{unique_all,true},{spawn_options, default}]), [1,2] = qlc:next_answers(C2, all_remaining), ok = qlc:delete_cursor(C2)">>, <<"Q = qlc:q([X || X <- [1,2,1,2,1]]), C1 = qlc:cursor(Q, [{unique_all,false},{spawn_options, []}]), [1,2,1,2,1] = qlc:next_answers(C1, all_remaining), ok = qlc:delete_cursor(C1), C2 = qlc:cursor(Q, [{unique_all,false},{spawn_options, []}]), [1,2,1,2,1] = qlc:next_answers(C2, all_remaining), ok = qlc:delete_cursor(C2)">>, <<"Q = qlc:q([X || X <- [1,2,1,2,1]]), C1 = qlc:cursor(Q, [{unique_all,false}]), [1,2,1,2,1] = qlc:next_answers(C1, all_remaining), ok = qlc:delete_cursor(C1), C2 = qlc:cursor(Q, [{unique_all,false}]), [1,2,1,2,1] = qlc:next_answers(C2, all_remaining), ok = qlc:delete_cursor(C2)">> ], ?line run(Config, Ts), ok. fold(doc) -> "fold/4"; fold(suite) -> []; fold(Config) when is_list(Config) -> ScratchDir = filename:join([?privdir, "scratch","."]), Ts = [<<"Q = qlc:q([X || X <- [1,2,1,2,1]]), F = fun(Obj, A) -> A++[Obj] end, {'EXIT',{badarg,_}} = (catch qlc:fold(F, [], Q, {bad,arg})), {'EXIT',{badarg,_}} = (catch qlc:fold(F, [], badarg)), {'EXIT',{badarg,_}} = (catch qlc:fold(F, [], {spawn_options, [a|b]})), H = qlc:q([X || X <- throw({throw,t})]), {throw,t} = (catch {any_term,qlc:fold(F, [], H)}), [1,2] = qlc:fold(F, [], Q, {unique_all,true}), {'EXIT',{badarg,_}} = (catch qlc:fold(F, [], Q, [{unique_all,bad}])), [1,2,1,2,1] = qlc:fold(F, [], Q, [{unique_all,false}])">>, [<<"Dir = \"">>,ScratchDir,<<"\", qlc_SUITE:prep_scratchdir(Dir), E = ets:new(foo, []), [true || I <- lists:seq(1, 50000), not ets:insert(E, {I, I})], H = qlc:q([{X,Y} || Y <- [1,2], X <- qlc:sort(ets:table(E),{tmpdir,Dir}), qlc_SUITE:truncate_tmpfile(Dir, 0)]), F = fun(Obj, A) -> A++[Obj] end, R = qlc:fold(F, [], H), ets:delete(E), {error,_,{bad_object,_}} = R">>], <<"E = ets:new(test, []), H = qlc:q([{X,Y} || X <- qlc_SUITE:bad_table_throw(E), Y <- ets:table(E)]), F = fun(Obj, A) -> A++[Obj] end, R1 = (catch {any_term,qlc:fold(F, [], H, {unique_all,false})}), R2 = (catch {any_term,qlc:fold(F, [], H, {unique_all,true})}), ets:delete(E), true = {throw,bad_pre_fun} == R1, true = {throw,bad_pre_fun} == R2">>, <<"E = ets:new(test, []), H = qlc:q([{X,Y} || X <- qlc_SUITE:bad_table_exit(E), Y <- ets:table(E)]), F = fun(Obj, A) -> A++[Obj] end, R1 = (catch qlc:fold(F, [], H, {unique_all,false})), R2 = (catch qlc:fold(F, [], H, {unique_all,true})), ets:delete(E), {'EXIT',{bad_pre_fun,_}} = R1, {'EXIT',{bad_pre_fun,_}} = R2">>, <<"F = fun(Obj, A) -> A++[Obj] end, Q = qlc:q([X || X <- [1,2,1,2,1], throw({throw,wrong})]), {throw,wrong} = (catch {any_term,qlc:fold(F, [], Q, {unique_all,true})}), {throw,wrong} = (catch {any_term,qlc:fold(F, [], Q)})">>, <<"F = fun(Obj, A) -> A++[Obj] end, Q = qlc:q([X || X <- [4,3,2,1,0,-1], begin 3/X > 0 end]), {'EXIT',{badarith,_}} = (catch qlc:fold(F, [], Q, {unique_all,true})), {'EXIT',{badarith,_}} = (catch qlc:fold(F, [], Q, [{unique_all,false}])) ">>, <<"F = fun(Obj, A) -> A++[Obj] end, [1,2] = qlc:fold(F, [], qlc:q([X || X <- [1,2]])), [1,2,3,4] = qlc:fold(F, [], qlc:append([1,2],[3,4])), [1,2] = qlc:fold(F, [], qlc:sort([2,1])), E = ets:new(foo, []), ets:insert(E, [{1},{2}]), [{1},{2}] = lists:sort(qlc:fold(F, [], ets:table(E))), true = ets:delete(E)">>, <<"F = fun(_Obj, _A) -> throw({throw,fatal}) end, Q = qlc:q([X || X <- [4,3,2]]), {throw,fatal} = (catch {any_term,qlc:fold(F, [], Q, {unique_all,true})}), {throw,fatal} = (catch {any_term,qlc:fold(F, [], Q, [{unique_all,false}])})">>, <<"G = fun(_Obj, _A, D) -> 17/D end, F = fun(Obj, A) -> G(Obj, A, 0) end, Q = qlc:q([X || X <- [4,3,2]]), {'EXIT',{badarith,_}} = (catch qlc:fold(F, [], Q, {unique_all,true})), {'EXIT',{badarith,_}} = (catch qlc:fold(F, [], Q, [{unique_all,false}])) ">> ], ?line run(Config, Ts), ok. eval_unique(doc) -> "Test the unique_all option of eval."; eval_unique(suite) -> []; eval_unique(Config) when is_list(Config) -> Ts = [<<"QLC1 = qlc:q([X || X <- qlc:append([[1,1,2], [1,2,3,2,3]])]), [1,2,3] = qlc:eval(QLC1, {unique_all,true}), QLC2 = qlc:q([X || X <- [1,2,1,2,1,2,1]]), [1,2] = qlc:e(QLC2, {unique_all,true})">>, <<"E = ets:new(test, []), true = ets:insert(E, [{1,a},{2,b},{3,c}]), H = qlc:q([X || X <- qlc:append([ets:table(E), ets:table(E)])]), R1 = qlc:e(H, {unique_all,false}), R2 = qlc:e(H, {unique_all,true}), ets:delete(E), true = lists:sort(R1) == [{1,a},{1,a},{2,b},{2,b},{3,c},{3,c}], true = lists:sort(R2) == [{1,a},{2,b},{3,c}] ">>, <<"Q1 = qlc:q([{X,make_ref()} || X <- [1,2,1,2]]), [_,_] = qlc:e(Q1, {unique_all,true}), [_,_,_,_] = qlc:e(Q1, {unique_all,false}), [_,_] = qlc:e(Q1, [{unique_all,true}]), Q2 = qlc:q([{X,make_ref()} || X <- qlc:append([[1,2,1,2]])]), [_,_] = qlc:e(Q2, {unique_all,true}), [_,_,_,_] = qlc:e(Q2, {unique_all,false}), [_,_] = qlc:e(Q2, [{unique_all,true}]) ">>, <<"Q = qlc:q([{X,make_ref()} || X <- qlc:sort([1,2,1,2])]), [_, _] = qlc:e(Q, {unique_all,true}), Q1 = qlc:q([X || X <- [1,2,1,2]]), Q2 = qlc:q([{X,make_ref()} || X <- qlc:sort(Q1)]), [_, _] = qlc:e(Q2, {unique_all,true}) ">>, <<"E = ets:new(test, []), true = ets:insert(E, [{1,a},{2,b},{3,c}]), H = qlc:q([X || X <- qlc:append([[1,2,1,2]])]), [1,2,1,2] = qlc:e(H, {unique_all,false}), [1,2] = qlc:e(H, {unique_all,true}), ets:delete(E)">>, <<"E = ets:new(foo, [duplicate_bag]), true = ets:insert(E, [{1,a},{1,a},{2,b},{3,c},{4,c},{4,d}]), Q1 = qlc:q([{X,make_ref()} || {_, X} <- ets:table(E)]), true = length(qlc:eval(Q1, {unique_all, true})) =:= 5, Q2 = qlc:q([X || {_, X} <- ets:table(E)]), true = length(qlc:eval(Q2, {unique_all, true})) =:= 4, Q3 = qlc:q([element(2, X) || X <- ets:table(E)]), true = length(qlc:eval(Q3, {unique_all, true})) =:= 4, Q4 = qlc:q([1 || _X <- ets:table(E)]), true = length(qlc:eval(Q4, {unique_all, true})) =:= 1, true = ets:delete(E) ">>, <<"Q1 = qlc:q([X || X <- qlc:append([[1], [2,1]])]), Q2 = qlc:q([X || X <- qlc:append([[2,1], [2]])]), Q3 = qlc:q([{X,Y} || X <- Q1, Y <- Q2]), [{1,2},{1,1},{2,2},{2,1}] = qlc:e(Q3, {unique_all,true}), Q4 = qlc:q([{X,Y,make_ref()} || X <- Q1, Y <- Q2]), [{1,2,_},{1,1,_},{2,2,_},{2,1,_}] = qlc:e(Q4, {unique_all,true}) ">>, <<"Q1 = qlc:q([X || X <- [1,2,1]]), Q2 = qlc:q([X || X <- [2,1,2]]), Q3 = qlc:q([{X,Y} || X <- Q1, Y <- Q2]), [{1,2},{1,1},{2,2},{2,1}] = qlc:e(Q3,{unique_all,true}), Q4 = qlc:q([{X,Y,make_ref()} || X <- Q1, Y <- Q2]), [{1,2,_},{1,1,_},{2,2,_},{2,1,_}] = qlc:e(Q4, {unique_all,true}) ">>, <<"Q1 = qlc:q([X || {X,_} <- [{1,a},{1,b}]]), [1] = qlc:e(Q1, {unique_all, true}), Q2 = qlc:q([a || _ <- [{1,a},{1,b}]]), [a] = qlc:e(Q2, {unique_all, true}) ">>, <<"Q = qlc:q([SQV || SQV <- qlc:q([X || X <- [1,2,1]],unique)], unique), {call,_,_,[{lc,_,{var,_,'X'},[{generate,_,{var,_,'X'},_}]},_]} = qlc:info(Q, [{format,abstract_code},unique_all]), [1,2] = qlc:e(Q)">>, <<"Q = qlc:q([X || X <- [1,2,1]]), {call,_,_,[{lc,_,{var,_,'X'},[{generate,_,{var,_,'X'},_}]},_]} = qlc:info(Q, [{format,abstract_code},unique_all]), [1,2] = qlc:e(Q, unique_all)">>, <<"Q1 = qlc:sort([{1},{2},{3},{1}], [{unique,true}]), Q = qlc:sort(Q1,[{unique,true}]), {sort,{sort,{list,_},[{unique,true}]},[]} = i(Q)">> ], ?line run(Config, Ts), ok. eval_cache(doc) -> "Test the cache_all and unique_all options of eval."; eval_cache(suite) -> []; eval_cache(Config) when is_list(Config) -> Ts = [ <<"E = ets:new(apa, [ordered_set]), ets:insert(E, [{1},{2}]), H = qlc:q([X || Y <- [3,4], ets:insert(E, {Y}), X <- ets:table(E)]), % already unique, no cache... {qlc, _, [{generate, _, {qlc, _, [{generate, _, {list, [3,4]}}], [{unique,true}]}}, _, {generate, _, {table,_}}], [{unique,true}]} = i(H, [cache_all, unique_all]), [{1},{2},{3},{4}] = qlc:e(H, [cache_all, unique_all]), ets:delete(E)">>, <<"E = ets:new(apa, [ordered_set]), ets:insert(E, [{1},{2}]), H = qlc:q([X || Y <- [3,4], ets:insert(E, {Y}), X <- ets:table(E)]), % no cache... {qlc, _, [{generate, _,{list, [3,4]}}, _, {generate, _, {table,_}}], []} = i(H, cache_all), [{1},{2},{3},{1},{2},{3},{4}] = qlc:e(H, [cache_all]), ets:delete(E)">>, <<"E = ets:new(apa, [ordered_set]), ets:insert(E, [{1},{2}]), H = qlc:q([X || Y <- [3,4], ets:insert(E, {Y}), X <- qlc:q([X || X <- ets:table(E)], cache)]), {qlc, _, [{generate, _, {list, [3,4]}}, _, {generate, _, {qlc, _, [{generate, _, {table,_}}], [{cache,ets}]}}], []} = i(H, cache_all), [{1},{2},{3},{1},{2},{3}] = qlc:e(H, [cache_all]), ets:delete(E)">>, <<"%% {cache_all,no} does not override {cache,true}. E = ets:new(apa, [ordered_set]), ets:insert(E, [{1},{2}]), H = qlc:q([X || Y <- [3,4], ets:insert(E, {Y}), X <- qlc:q([X || X <- ets:table(E)], cache)]), {qlc, _, [{generate, _, {list, [3,4]}}, _, {generate, _, {qlc, _, [{generate, _, {table,_}}], [{cache,ets}]}}], []} = i(H, {cache_all,no}), [{1},{2},{3},{1},{2},{3}] = qlc:e(H, [cache_all]), ets:delete(E)">>, <<"E = ets:new(apa, [ordered_set]), ets:insert(E, [{1},{2}]), H = qlc:q([X || Y <- [3,4], ets:insert(E, {Y}), X <- ets:table(E)]), {qlc, _, [{generate, _, {qlc, _, [{generate, _,{list, [3,4]}}], [{unique,true}]}}, _, {generate, _,{table,_}}], [{unique,true}]} = i(H, unique_all), [{1},{2},{3},{4}] = qlc:e(H, [unique_all]), ets:delete(E)">>, %% cache_all is ignored <<"E = ets:new(apa, [ordered_set]), ets:insert(E, [{1},{2},{0}]), H = qlc:q([X || X <- qlc:sort(ets:table(E))]), {sort,_Table,[]} = i(H, cache_all), [{0},{1},{2}] = qlc:e(H, cache_all), ets:delete(E)">>, <<"F = fun(Obj, A) -> A++[Obj] end, E = ets:new(apa, [duplicate_bag]), true = ets:insert(E, [{1,a},{2,b},{1,a}]), Q = qlc:q([X || X <- ets:table(E)], cache), {table, _} = i(Q, []), R = qlc:fold(F, [], Q, []), ets:delete(E), true = [{1,a},{1,a},{2,b}] == lists:sort(R)">>, <<"E = ets:new(apa, [ordered_set]), ets:insert(E, [{1},{2},{0}]), H = qlc:q([X || X <- ets:table(E)], cache), {table, _} = i(H, cache_all), [{0},{1},{2}]= qlc:e(H, cache_all), ets:delete(E)">>, <<"E = ets:new(foo, []), true = ets:insert(E, [{1}, {2}]), Q1 = qlc:q([{X} || X <- ets:table(E)]), Q2 = qlc:q([{X,Y} || {X} <- Q1, {Y} <- Q1]), {qlc, _, [{generate, _, {table, _}}, {generate, _, {qlc, _, [{generate, _, {table, _}}], [{cache,ets}]}}], []} = i(Q2, cache_all), [{{1},{1}},{{1},{2}},{{2},{1}},{{2},{2}}] = lists:sort(qlc:e(Q2, cache_all)), ets:delete(E)">>, <<"L1 = [1,2,3], L2 = [4,5,6], Q1 = qlc:append(L1, L2), Q2 = qlc:q([{X} || X <- Q1]), {qlc, _,[{generate, _,{append, [{list, L1}, {list, L2}]}}], []} = i(Q2, [cache_all]), [{1},{2},{3},{4},{5},{6}] = qlc:e(Q2, [cache_all])">>, <<"H = qlc:sort(qlc:q([1 || _ <- [a,b]])), {sort, {qlc, _, [{generate, _, {qlc, _, [{generate, _, {list, [a,b]}}], [{unique,true}]}}], [{unique,true}]}, []} = i(H, unique_all), [1] = qlc:e(H, unique_all)">> ], ?line run(Config, Ts), ok. append(doc) -> "Test the append function."; append(suite) -> []; append(Config) when is_list(Config) -> Ts = [<<"C = qlc:cursor(qlc:q([X || X <- [0,1,2,3], begin 10/X > 0.0 end])), R = (catch qlc:next_answers(C)), {'EXIT',{badarith,_}} = R">>, <<"C = qlc:cursor(qlc:q([X || X <- [0 | fun() -> exit(bad) end]])), R = (catch qlc:next_answers(C)), {'EXIT',bad} = R">>, <<"{'EXIT',{badarg,_}} = (catch qlc:append([a], a)), {'EXIT',{badarg,_}} = (catch qlc:append([[a],a]))">>, <<"C = qlc:cursor(qlc:q([X || X <- [0,1,2,3], begin throw({throw,wrong}), true end])), {throw,wrong} = (catch {any_term,qlc:next_answers(C)})">>, <<"QLC = qlc:q([X || X <- [0,1,2,3], begin throw({throw,wrong}), true end]), {throw,wrong} = (catch {any_term,qlc:eval(QLC)}), {throw,wrong} = (catch {any_term,qlc:e(QLC, {unique_all,true})})">>, <<"H1 = qlc:q([X || X <- [1,2,3]]), H2 = qlc:q([X || X <- [4,5,6]]), R = qlc:e(qlc:q([X || X <- qlc:append([H1, H2])])), true = R == [1,2,3,4,5,6]">>, <<"H1 = [1,2,3], H2 = qlc:q([X || X <- [4,5,6]]), R = qlc:e(qlc:q([X || X <- qlc:append(H1, H2)])), true = R == [1,2,3,4,5,6]">>, <<"H1 = qlc:q([X || X <- [1,2,3]]), H2 = qlc:q([X || X <- [4,5,6]]), R = qlc:e(qlc:q([X || X <- qlc:append(qlc:e(H1), H2)])), true = R == [1,2,3,4,5,6]">>, <<"H1 = qlc:q([X || X <- [1,2,3]]), H2 = [4,5,6], R = qlc:e(qlc:q([X || X <- qlc:append(H1, H2)])), true = R == [1,2,3,4,5,6]">>, <<"H1 = qlc:q([X || X <- [1,2,3]]), H2 = qlc:q([X || X <- [4,5,6]]), R = qlc:e(qlc:q([X || X <- qlc:append([H1, H2, H1]), X < 5])), true = R == [1,2,3,4,1,2,3]">>, <<"R = qlc:e(qlc:q([X || X <- qlc:append([lista(), anrop()])])), true = R == [a,b,1,2], ok. lista() -> [a,b]. anrop() -> qlc:q([X || X <- [1,2]]). foo() -> bar">>, %% Used to work up to R11B. % <<"apa = qlc:e(qlc:q([X || X <- qlc:append([[1,2,3], ugly()])])), % ok. % % ugly() -> % [a | apa]. % foo() -> bar">>, %% Maybe this one should fail. <<"[a|b] = qlc:e(qlc:q([X || X <- qlc:append([[a|b]])])), ok">>, <<"17 = qlc:e(qlc:q([X || X <- qlc:append([[1,2,3],ugly2()])])), ok. ugly2() -> [a | fun() -> 17 end]. foo() -> bar">>, <<"E = ets:new(test, []), true = ets:insert(E, [{1,a},{2,b},{3,c}]), H = qlc:q([X || X <- qlc:append([ets:table(E), apa])]), {'EXIT',{badarg,_}} = (catch qlc:e(H)), false = ets:info(E, safe_fixed), {'EXIT',{badarg,_}} = (catch qlc:e(H)), false = ets:info(E, safe_fixed), {'EXIT',{badarg,_}} = (catch qlc:cursor(H)), false = ets:info(E, safe_fixed), F = fun(Obj, A) -> A++[Obj] end, {'EXIT',{badarg,_}} = (catch qlc:fold(F, [], H)), false = ets:info(E, safe_fixed), ets:delete(E)">>, <<"H1 = qlc:q([X || X <- [1,2,3]]), H2 = qlc:q([X || X <- [a,b,c]]), R = qlc:e(qlc:q([X || X <- qlc:append(H1,qlc:append(H1,H2))])), true = R == [1,2,3,1,2,3,a,b,c]">>, <<"H = qlc:q([X || X <- qlc:append([],qlc:append([[], []]))]), [] = qlc:e(H)">>, <<"Q1 = qlc:q([X || X <- [3,4,4]]), Q2 = qlc:q([X || X <- qlc:sort(qlc:append([[1,2], Q1]))]), [1,2,3,4,4] = qlc:e(Q2), [1,2,3,4] = qlc:e(Q2, {unique_all,true})">>, <<"[] = qlc:e(qlc:q([X || X <- qlc:append([])]))">>, <<"Q1 = qlc:q([X || X <- [a,b]]), Q2 = qlc:q([X || X <- [1,2]]), Q3 = qlc:append([Q1, Q2, qlc:sort([2,1])]), Q = qlc:q([X || X <- Q3]), {append, [{list, [a,b]}, {list, [1,2]}, {sort,{list, [2,1]},[]}]} = i(Q), [a,b,1,2,1,2] = qlc:e(Q)">> ], ?line run(Config, Ts), ok. evaluator(doc) -> "Simple call from evaluator."; evaluator(suite) -> []; evaluator(Config) when is_list(Config) -> ?line true = is_alive(), evaluator_2(Config, []), ?line {ok, Node} = start_node(qlc_SUITE_evaluator), ?line ok = rpc:call(Node, ?MODULE, evaluator_2, [Config, [compiler]]), ?line ?t:stop_node(Node), ok. evaluator_2(Config, Apps) -> ?line lists:foreach(fun(App) -> true = code:del_path(App) end, Apps), FileName = filename:join(?privdir, "eval"), ?line ok = file:write_file(FileName, <<"H = qlc:q([X || X <- L]), [1,2,3] = qlc:e(H).">>), ?line Bs = erl_eval:add_binding('L', [1,2,3], erl_eval:new_bindings()), ?line ok = file:eval(FileName, Bs), %% The error message is "handled" a bit too much... %% (no trace of erl_lint left) ?line ok = file:write_file(FileName, <<"H = qlc:q([X || X <- L]), qlc:e(H).">>), ?line {error,_} = file:eval(FileName), %% Ugly error message; badarg is caught by file.erl. ?line ok = file:write_file(FileName, <<"H = qlc:q([Z || {X,Y} <- [{a,2}], Z <- [Y]]), qlc:e(H).">>), ?line {error,_} = file:eval(FileName), _ = file:delete(FileName), ok. start_node(Name) -> ?line PA = filename:dirname(code:which(?MODULE)), ?t:start_node(Name, slave, [{args, "-pa " ++ PA}]). string_to_handle(doc) -> "string_to_handle/1,2."; string_to_handle(suite) -> []; string_to_handle(Config) when is_list(Config) -> ?line {'EXIT',{badarg,_}} = (catch qlc:string_to_handle(14)), ?line {'EXIT',{badarg,_}} = (catch qlc:string_to_handle("[X || X <- [a].", unique_all)), ?line R1 = {error, _, {_,erl_scan,_}} = qlc:string_to_handle("'"), ?line "1: unterminated " ++ _ = lists:flatten(qlc:format_error(R1)), ?line {error, _, {_,erl_parse,_}} = qlc:string_to_handle("foo"), ?line {'EXIT',{badarg,_}} = (catch qlc:string_to_handle("foo, bar.")), ?line R3 = {error, _, {_,?QLC,not_a_query_list_comprehension}} = qlc:string_to_handle("bad."), ?line "1: argument is not" ++ _ = lists:flatten(qlc:format_error(R3)), ?line R4 = {error, _, {_,?QLC,{used_generator_variable,'Y'}}} = qlc:string_to_handle("[X || begin Y = [1,2], true end, X <- Y]."), ?line "1: generated variable 'Y'" ++ _ = lists:flatten(qlc:format_error(R4)), ?line {error, _, {_,erl_lint,_}} = qlc:string_to_handle("[X || X <- A]."), ?line H1 = qlc:string_to_handle("[X || X <- [1,2]]."), ?line [1,2] = qlc:e(H1), ?line H2 = qlc:string_to_handle("[X || X <- qlc:append([a,b]," "qlc:e(qlc:q([X || X <- [c,d,e]])))]."), ?line [a,b,c,d,e] = qlc:e(H2), %% The generated fun has many arguments (erl_eval has a maximum of 20). ?line H3 = qlc:string_to_handle( "[{A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W} ||" " {A,B,C,D,E,F,G,H,I,J,K,L,M,N,O,P,Q,R,S,T,U,V,W} <- []]."), ?line [] = qlc:e(H3), ?line Bs1 = erl_eval:add_binding('L', [1,2,3], erl_eval:new_bindings()), ?line H4 = qlc:string_to_handle("[X || X <- L].", [], Bs1), ?line [1,2,3] = qlc:e(H4), ?line H5 = qlc:string_to_handle("[X || X <- [1,2,1,2]].", [unique, cache]), ?line [1,2] = qlc:e(H5), ?line Ets = ets:new(test, []), ?line true = ets:insert(Ets, [{1}]), ?line Bs2 = erl_eval:add_binding('E', Ets, erl_eval:new_bindings()), ?line Q = "[X || {X} <- ets:table(E)].", ?line [1] = qlc:e(qlc:string_to_handle(Q, [], Bs2)), ?line [1] = qlc:e(qlc:string_to_handle(Q, {max_lookup,1000}, Bs2)), ?line [1] = qlc:e(qlc:string_to_handle(Q, {max_lookup,infinity}, Bs2)), ?line {'EXIT',{badarg,_}} = (catch qlc:string_to_handle(Q, {max_lookup,-1}, Bs2)), ?line {'EXIT', {no_lookup_to_carry_out, _}} = (catch qlc:e(qlc:string_to_handle(Q, {lookup,true}, Bs2))), ?line ets:delete(Ets), ok. table(doc) -> "table"; table(suite) -> []; table(Config) when is_list(Config) -> dets:start(), Ts = [ <<"E = ets:new(test, []), {'EXIT',{badarg,_}} = (catch qlc:e(qlc:q([X || X <- ets:table(E, [badarg])]))), [] = qlc:e(qlc:q([X || X <- ets:table(E)])), ets:delete(E)">>, <<"{'EXIT',{badarg,_}} = (catch qlc:table(not_a_fun, []))">>, <<"E = ets:new(test, []), true = ets:insert(E, [{1,a},{2,b},{3,c}]), H = qlc:q([{X,Y} || X <- ets:table(E), Y <- ets:table(E)]), R = qlc:e(H), ets:delete(E), [{{1,a},{1,a}},{{1,a},{2,b}},{{1,a},{3,c}}, {{2,b},{1,a}},{{2,b},{2,b}},{{2,b},{3,c}}, {{3,c},{1,a}},{{3,c},{2,b}},{{3,c},{3,c}}] = lists:sort(R)">>, <<"E = ets:new(test, []), true = ets:insert(E, [{1,a},{2,b},{3,c}]), H = qlc:q([X || X <- qlc:append([ets:table(E), [a,b,c], ets:table(E)])]), R = qlc:e(H), ets:delete(E), [a,b,c,{1,a},{1,a},{2,b},{2,b},{3,c},{3,c}] = lists:sort(R)">>, <<"E = ets:new(test, []), true = ets:insert(E, [{1,a},{2,b},{3,c}]), false = ets:info(E, safe_fixed), H = qlc:q([{X,Y} || X <- ets:table(E, {n_objects, default}), Y <- ets:table(E, {n_objects, 2}), false =/= ets:info(E, safe_fixed), throw({throw,apa})]), {throw,apa} = (catch {any_term,qlc:e(H)}), false = ets:info(E, safe_fixed), ets:delete(E)">>, <<"E = ets:new(test, []), true = ets:insert(E, [{1,a},{2,b},{3,c}]), false = ets:info(E, safe_fixed), H = qlc:q([{X,Y} || X <- ets:table(E), Y <- ets:table(E), false =/= ets:info(E, safe_fixed), exit(apa)]), {'EXIT',apa} = (catch {any_term,qlc:e(H)}), false = ets:info(E, safe_fixed), ets:delete(E)">>, <<"E = ets:new(test, []), true = ets:insert(E, [{1,a},{2,b},{3,c}]), H = qlc:q([{X,Y} || X <- qlc_SUITE:bad_table_throw(E), Y <- ets:table(E)]), R = (catch {any_term,qlc:cursor(H)}), false = ets:info(E, safe_fixed), ets:delete(E), {throw,bad_pre_fun} = R">>, <<"E = ets:new(test, []), true = ets:insert(E, [{1,a},{2,b},{3,c}]), H = qlc:q([{X,Y} || X <- qlc_SUITE:bad_table_exit(E), Y <- ets:table(E)]), R = (catch {any_term,qlc:cursor(H)}), false = ets:info(E, safe_fixed), ets:delete(E), {'EXIT',{bad_pre_fun,_}} = R">>, <<"E = ets:new(test, [ordered_set]), true = ets:insert(E, [{1,a},{2,b},{3,c}]), H = qlc:q([X || X <- qlc_SUITE:default_table(E)]), R = qlc:e(H), ets:delete(E), [{1,a},{2,b},{3,c}] = R">>, <<"E = ets:new(test, [ordered_set]), true = ets:insert(E, [{1,a},{2,b},{3,c}]), H = qlc:q([X || X <- qlc_SUITE:bad_table(E)]), {'EXIT', {badarg, _}} = (catch qlc:e(H)), ets:delete(E)">>, %% The info tag num_of_objects is currently not used. % <<"E = ets:new(test, [ordered_set]), % true = ets:insert(E, [{1,a},{2,b},{3,c}]), % H = qlc:q([X || X <- qlc_SUITE:bad_table_info_fun_n_objects(E)]), % {'EXIT', finito} = (catch {any_term,qlc:e(H)}), % ets:delete(E)">>, <<"E = ets:new(test, [ordered_set]), true = ets:insert(E, [{1,a},{2,b},{3,c}]), H = qlc:q([Y || {X,Y} <- qlc_SUITE:bad_table_info_fun_indices(E), X =:= a]), %% This is due to lookup. If the table were traversed there %% would be no failure. {throw, apa} = (catch {any_term,qlc:e(H)}), ets:delete(E)">>, <<"E = ets:new(test, [ordered_set]), true = ets:insert(E, [{1,a},{2,b},{3,c}]), H = qlc:q([Y || {X,Y} <- qlc_SUITE:bad_table_info_fun_keypos(E), X =:= a]), {'EXIT',{keypos,_}} = (catch {any_term,qlc:info(H)}), {'EXIT',{keypos,_}} = (catch {any_term,qlc:e(H)}), ets:delete(E)">>, begin MS = ets:fun2ms(fun(X) when element(1, X) > 1 -> X end), [<<"E = ets:new(test, []), true = ets:insert(E, [{1,a},{2,b},{3,c}]), MS = ">>, io_lib:format("~w", [MS]), <<", H = qlc:q([{X,Y} || X <- ets:table(E,{traverse,{select, MS}}), Y <- ets:table(E)]), R = qlc:e(H), ets:delete(E), [{{2,b},{1,a}},{{2,b},{2,b}},{{2,b},{3,c}}, {{3,c},{1,a}},{{3,c},{2,b}},{{3,c},{3,c}}] = lists:sort(R)">>] end, begin % a short table MS = ets:fun2ms(fun(X) when element(1, X) > 1 -> X end), [<<"E = ets:new(test, []), true = ets:insert(E, [{0,b}]), MS = ">>, io_lib:format("~w", [MS]), <<", H1 = qlc:q([X || X <- ets:table(E)]), R1 = qlc:e(H1), H2 = qlc:q([X || X <- ets:table(E, {traverse, {select, MS}})]), R2 = qlc:e(H2), ets:delete(E), [_] = R1, [] = R2">>] end, begin File = filename:join(?privdir, "detsfile"), _ = file:delete(File), [<<"{ok, Tab} = dets:open_file(apa, [{file,\"">>, File, <<"\"}, {type,bag}]), ok = dets:insert(Tab, [{1,a},{1,b}]), R = qlc:e(qlc:q([X || X <- dets:table(Tab)])), dets:close(Tab), file:delete(\"">>, File, <<"\"), R">>] end, %% [T || P <- Table, F] turned into a match spec. <<"E = ets:new(apa, [duplicate_bag]), true = ets:insert(E, [{1,a},{2,b},{3,c},{4,d}]), QH = qlc:q([X || {X,_} <- ets:table(E), X > 2], unique), {qlc, _, [{generate, _, {table, _}}], [{unique,true}]} = i(QH), [3,4] = lists:sort(qlc:e(QH)), ets:delete(E)">>, <<"E = ets:new(apa, []), true = ets:insert(E, [{1,a},{2,b}]), {'EXIT', {badarg, _}} = (catch qlc_SUITE:bad_table_format(E)), ets:delete(E)">>, <<"E = ets:new(apa, []), true = ets:insert(E, [{1,a},{2,b}]), {'EXIT', {badarg, _}} = (catch qlc_SUITE:bad_table_format_arity(E)), ets:delete(E)">>, <<"E = ets:new(apa, []), true = ets:insert(E, [{1,a},{2,b}]), {'EXIT', {badarg, _}} = (catch qlc_SUITE:bad_table_info_arity(E)), ets:delete(E)">>, <<"E = ets:new(apa, []), true = ets:insert(E, [{1,a},{2,b}]), {'EXIT', {badarg, _}} = (catch qlc_SUITE:bad_table_traverse(E)), ets:delete(E)">>, <<"E = ets:new(apa, []), true = ets:insert(E, [{1,a},{2,b}]), {'EXIT', {badarg, _}} = (catch qlc_SUITE:bad_table_post(E)), ets:delete(E)">>, <<"E = ets:new(apa, []), true = ets:insert(E, [{1,a},{2,b}]), {'EXIT', {badarg, _}} = (catch qlc_SUITE:bad_table_max_lookup(E)), ets:delete(E)">>, <<"E = ets:new(apa, []), true = ets:insert(E, [{1,a},{2,b}]), {'EXIT', {badarg, _}} = (catch qlc_SUITE:bad_table_lookup(E)), ets:delete(E)">>, <<"L = [{1,a},{2,b},{3,c}], QH = qlc:q([element(2, X) || X <- qlc_SUITE:table(L, [2]), (element(1, X) =:= 1) or (2 =:= element(1, X))]), [a,b] = lists:sort(qlc:e(QH))">>, <<"etsc(fun(E) -> Q = qlc:q([{A,B} || {A,B} <- qlc:q([{B,A} || {A,B} <- ets:table(E), (A =:= 1) or (A =:= 2), math:sqrt(B) < A])]), [{2,2}] = qlc:eval(Q), [1,2] = lookup_keys(Q) end, [{1,1},{2,2}])">> ], ?line run(Config, Ts), Ts2 = [ %% [T || P <- Table, F] turned into a match spec. Records needed. <<"E = ets:new(foo, [bag]), ets:insert(E, [{a,1,2},#a{b=3,c=4},{a,3}]), QH = qlc:q([X || X <- ets:table(E), is_record(X, a)]), {list,{table,_}, _} = i(QH), [{a,1,2},{a,3,4}] = lists:sort(qlc:eval(QH)), ets:delete(E)">> ], ?line run(Config, <<"-record(a, {b,c}).\n">>, Ts2), ok. process_dies(doc) -> "Caller or cursor process dies."; process_dies(suite) -> []; process_dies(Config) when is_list(Config) -> Ts = [ <<"E = ets:new(test, []), true = ets:insert(E, [{1,a},{2,b},{3,c}]), false = ets:info(E, safe_fixed), Parent = self(), F = fun() -> H = qlc:q([X || X <- ets:table(E)]), qlc:cursor(H), Parent ! {self(),ok} end, Pid = spawn_link(F), receive {Pid,ok} -> ok end, timer:sleep(10), false = ets:info(E, safe_fixed), ets:delete(E)">>, <<"%% This is not nice. The cursor's monitor kicks in. E = ets:new(test, []), true = ets:insert(E, [{1,a},{2,b},{3,c}]), false = ets:info(E, safe_fixed), Parent = self(), F = fun() -> H = qlc:q([X || begin process_flag(trap_exit, false), {links, [Pid]} = process_info(self(), links), unlink(Pid), timer:sleep(1), {links, []} = process_info(self(), links), true end, X <- ets:table(E)]), C = qlc:cursor(H), qlc:next_answers(C), Parent ! {self(),ok} end, Pid = spawn_link(F), receive {Pid,ok} -> ok end, timer:sleep(10), false = ets:info(E, safe_fixed), ets:delete(E)">>, <<"H = qlc:q([X || X <- [1,2]]), {qlc_cursor, Term} = C = qlc:cursor(H), PF = process_flag(trap_exit, true), F = fun(T) -> not is_pid(T) end, [Pid|_] = lists:dropwhile(F, tuple_to_list(Term)), exit(Pid, kill), timer:sleep(1), {'EXIT', {{qlc_cursor_pid_no_longer_exists, Pid}, _}} = (catch qlc:next_answers(C)), process_flag(trap_exit, PF)">>, <<"H = qlc:q([X || begin process_flag(trap_exit, true), true end, X <- [1,2]]), {qlc_cursor, Term} = C = qlc:cursor(H), PF = process_flag(trap_exit, true), F = fun(T) -> not is_pid(T) end, [Pid|_] = lists:dropwhile(F, tuple_to_list(Term)), [1] = qlc:next_answers(C, 1), exit(Pid, stop), timer:sleep(1), {'EXIT', {{qlc_cursor_pid_no_longer_exists, Pid}, _}} = (catch qlc:next_answers(C)), process_flag(trap_exit, PF)">>, <<"%% This is not nice. No cleanup is done... H = qlc:q([X || begin process_flag(trap_exit, false), true end, X <- [1,2]]), {qlc_cursor, Term} = C = qlc:cursor(H), PF = process_flag(trap_exit, true), F = fun(T) -> not is_pid(T) end, [Pid|_] = lists:dropwhile(F, tuple_to_list(Term)), [1] = qlc:next_answers(C, 1), exit(Pid, stop), timer:sleep(1), {'EXIT', {{qlc_cursor_pid_no_longer_exists, Pid}, _}} = (catch qlc:next_answers(C)), process_flag(trap_exit, PF)">>, <<"PF = process_flag(trap_exit, true), E = ets:new(test, []), %% Hard kill. No cleanup will be done. H = qlc:q([X || begin exit(self(), kill), true end, X <- ets:table(E)]), C = qlc:cursor(H), {'EXIT', {{qlc_cursor_pid_no_longer_exists, _}, _}} = (catch qlc:next_answers(C)), false = ets:info(E, safe_fixed), % - but Ets cleans up anyway. true = ets:delete(E), process_flag(trap_exit, PF)">>, <<"E = ets:new(test, []), true = ets:insert(E, [{1,a}]), %% The signal is caught by trap_exit. No process dies... H = qlc:q([X || begin exit(self(), normal), true end, X <- ets:table(E)]), C = qlc:cursor(H, {spawn_options, []}), [{1,a}] = qlc:next_answers(C), qlc:delete_cursor(C), false = ets:info(E, safe_fixed), true = ets:delete(E)">>, <<"E = ets:new(test, []), true = ets:insert(E, [{1,a}]), %% The same as last example. H = qlc:q([X || begin process_flag(trap_exit, true), exit(self(), normal), true end, X <- ets:table(E)]), C = qlc:cursor(H, {spawn_options, []}), [{1,a}] = qlc:next_answers(C), qlc:delete_cursor(C), false = ets:info(E, safe_fixed), true = ets:delete(E), ok">>, <<"E = ets:new(test, []), true = ets:insert(E, [{1,a}]), H = qlc:q([X || X <- ets:table(E)]), SpawnOpts = [link, monitor], % monitor is ignored {qlc_cursor, Term} = C = qlc:cursor(H, {spawn_options, SpawnOpts}), F = fun(T) -> not is_pid(T) end, [Pid|_] = lists:dropwhile(F, tuple_to_list(Term)), Me = self(), qlc_SUITE:install_error_logger(), Tuple = {this, tuple, is, writton, onto, the, error_logger}, SP = spawn(fun() -> Pid ! Tuple, Me ! {self(), done} end), receive {SP, done} -> ok end, [{1,a}] = qlc:next_answers(C), qlc:delete_cursor(C), {error, _Pid, Tuple} = qlc_SUITE:read_error_logger(), qlc_SUITE:uninstall_error_logger(), false = ets:info(E, safe_fixed), true = ets:delete(E), ok">> ], ?line run(Config, Ts), ok. sort(doc) -> "The sort option."; sort(suite) -> []; sort(Config) when is_list(Config) -> Ts = [ <<"H = qlc:q([X || X <- qlc:sort([1,2,3,2], {unique,true})]), [1,2,3] = qlc:e(H), C1 = qlc:cursor(H), [1,2,3] = qlc:next_answers(C1, all_remaining), qlc:delete_cursor(C1)">>, <<"H = qlc:q([{X,Y} || X <- qlc:sort(qlc:q([X || X <- [1,2,3,2]]), {unique,true}), Y <- [a,b]]), [{1,a},{1,b},{2,a},{2,b},{3,a},{3,b}] = qlc:e(H), C = qlc:cursor(H), [{1,a},{1,b},{2,a},{2,b},{3,a},{3,b}] = qlc:next_answers(C, all_remaining), qlc:delete_cursor(C)">>, <<"H = qlc:q([X || X <- qlc:sort(qlc:q([X || X <- apa]))]), {'EXIT',{badarg,_}} = (catch qlc:e(H))">>, %% An example with a side effect. The result may vary... <<"E = ets:new(test, [duplicate_bag]), true = ets:insert(E, [{1,17},{1,a}]), H_1 = qlc:q([X || X <- ets:table(E)]), H = qlc:q([X || X <- [1,2,3], ets:insert(E, {1,-X}), {_,Y} <- H_1, X > Y]), true = lists:sort(qlc:e(H)) == [1,2,2,3,3,3], true = ets:delete(E)">>, <<"E = ets:new(test, [duplicate_bag]), true = ets:insert(E, [{1,17}]), H_1 = qlc:q([X || X <- qlc:sort(ets:tab2list(E))]), %% Note: side effect in filter! H = qlc:q([X || X <- [1,2,3], ets:insert(E, {1,-X}), {_,Y} <- H_1, X > Y]), [] = qlc:e(H), true = ets:delete(E)">>, <<"H = qlc:q([X || X <- qlc:sort([1,2,3], {fopp,la})]), {'EXIT',{badarg,_}} = (catch qlc:e(H)), {'EXIT',{badarg,_}} = (catch qlc:cursor(H)), F = fun(Obj, A) -> A++[Obj] end, {'EXIT',{badarg,_}} = (catch qlc:fold(F, [], H))">>, <<"Q1 = qlc:q([X || X <- [1,2]]), AL = [Q1, [1,2,3]], Q2 = qlc:q([X || X <- qlc:sort(qlc:append(AL))]), [1,1,2,2,3] = qlc:e(Q2)">>, <<"H = qlc:q([{X,Y} || X <- qlc:sort(qlc:q([X || X <- [1,2,3,2]]), {unique,true}), Y <- [a,b]]), {qlc, _, [{generate, _, {sort, {qlc, _, [{generate, _, {list, [1,2,3,2]}}], [{unique,true}]}, []}}, {generate, _, {qlc, _, [{generate, _, {list, [a,b]}}], [{unique,true}]}}], [{unique,true}]} = i(H, unique_all), [{1,a},{1,b},{2,a},{2,b},{3,a},{3,b}] = qlc:e(H, unique_all)">>, <<"L = [1,2,1,3,4,3,1], true = lists:sort(L) == qlc:e(qlc:q([X || X <- qlc:sort(L)])), true = lists:usort(L) == qlc:e(qlc:q([X || X <- qlc:sort(L, {unique,true})])), true = lists:reverse(lists:sort(L)) == qlc:e(qlc:q([X || X <- qlc:sort(L, {order, descending})])), true = lists:reverse(lists:usort(L)) == qlc:e(qlc:q([X || X <- qlc:sort(L, [{order, descending}, {unique, true}])])), CF = fun(X, Y) -> X =< Y end, true = lists:sort(L) == qlc:e(qlc:q([X || X <- qlc:sort(L, {order, CF})])), true = lists:usort(L) == qlc:e(qlc:q([X || X <- qlc:sort(L, [{order, CF}, {unique, true}])]))">>, <<"E = ets:new(foo, []), [true || I <- lists:seq(1, 50000), not ets:insert(E, {I, I})], H = qlc:q([{X,Y} || X <- [a,b], Y <- qlc:sort(ets:table(E))]), 100000 = length(qlc:e(H)), ets:delete(E)">>, begin TmpDir = ?privdir, [<<"TE = process_flag(trap_exit, true), E = ets:new(foo, []), [true || I <- lists:seq(1, 50000), not ets:insert(E, {I, I})], Ports = erlang:ports(), H = qlc:q([{X,Y} || X <- [a,b], begin [P] = erlang:ports() -- Ports, exit(P, port_exit), true end, Y <- qlc:sort(ets:table(E), [{tmpdir,\"">>, TmpDir, <<"\"}])]), {error, qlc, {file_error, _, _}} = (catch qlc:e(H)), receive {'EXIT', _, port_exit} -> ok end, ets:delete(E), process_flag(trap_exit, TE)">>] end ], ?line run(Config, Ts), ok. keysort(doc) -> "The sort option."; keysort(suite) -> []; keysort(Config) when is_list(Config) -> Ts = [ <<"OF = fun(X, Y) -> X =< Y end, F = fun(Obj, A) -> A++[Obj] end, H = qlc:q([X || X <- qlc:keysort(1, [{2,a},{1,b}], {order,OF})]), {'EXIT',{{badarg,order},_}} = (catch qlc:e(H)), {'EXIT',{{badarg,order},_}} = (catch qlc:fold(F, [], H)), {'EXIT',{{badarg,order},_}} = (catch qlc:cursor(H))">>, <<"E = create_ets(1, 2), H = qlc:q([X || X <- qlc:keysort([1], ets:table(E), [{size,1},{tmpdir,\"/a/b/c\"}])]), H1 = qlc:q([X || {X,_} <- qlc:e(H), X < 4]), {error,_,{file_error,_,_}} = qlc:info(H1), {error,_,{file_error,_,_}} = qlc:e(H1), ets:delete(E)">>, <<"L = [{1,a},{2,b},{3,c},{2,b}], H = qlc:q([{X,Y} || {X,_} <- qlc:keysort(1, qlc:q([X || X <- L]), {unique,true}), Y <- [a,b]]), [{1,a},{1,b},{2,a},{2,b},{3,a},{3,b}] = qlc:e(H), C = qlc:cursor(H), [{1,a},{1,b},{2,a},{2,b},{3,a},{3,b}] = qlc:next_answers(C, all_remaining), qlc:delete_cursor(C)">>, <<"H1 = qlc:q([X || X <- qlc:keysort(0, [])]), {'EXIT',{badarg,_}} = (catch qlc:e(H1)), H2 = qlc:q([X || X <- qlc:keysort(1, [], {bad,arg})]), {'EXIT',{badarg,_}} = (catch qlc:e(H2)), H3 = qlc:q([X || X <- qlc:keysort([], [])]), {'EXIT',{badarg,_}} = (catch qlc:e(H3))">>, <<"H = qlc:q([X || X <- qlc:keysort(1, [{1,a},{2,b}], [{order,descending}, {compressed,true}])]), [{2,b},{1,a}] = qlc:e(H), H2 = qlc:q([X || X <- qlc:keysort(1, [{1},{2}], compressed)]), {'EXIT', {badarg, _}} = (catch qlc:e(H2))">>, <<"H = qlc:q([X || X <- qlc:keysort(1, [{1,a},{2,b}], {compressed,false})]), [{1,a},{2,b}] = qlc:e(H)">>, <<"E = create_ets(1, 2), H = qlc:q([X || X <- qlc:keysort([1], ets:table(E), [{size,1},{tmpdir,\"/a/b/c\"}])]), F = fun(Obj, A) -> A++[Obj] end, {error,_,{file_error,_,_}} = qlc:e(H), \" \\\"no such\" ++ _ = lists:dropwhile(fun(A) -> A =/= $\s end, lists:flatten(qlc:format_error(qlc:e(H)))), {error,_,{file_error,_,_}} = qlc:e(H, {unique_all,true}), {error,_,{file_error,_,_}} = qlc:cursor(H), {error,_,{file_error,_,_}} = qlc:cursor(H, {unique_all,true}), {error,_,{file_error,_,_}} = qlc:cursor(H, {spawn_options, []}), {error,_,{file_error,_,_}} = qlc:cursor(H, {spawn_options,default}), {error,_,{file_error,_,_}} = qlc:cursor(H, [{unique_all,true},{spawn_options, []}]), {error,_,{file_error,_,_}} = qlc:fold(F, [], H), {error,_,{file_error,_,_}} = qlc:fold(F, [],H, {unique_all,true}), ets:delete(E)">>, <<"L = [{1,b,a},{1,b,b},{1,a,a}], H = qlc:q([X || X <- qlc:keysort([4,1], L)]), {error,_,bad_object} = qlc:e(H), \"the keys\" ++ _ = qlc:format_error(qlc:e(H))">>, begin File = filename:join(?privdir, "afile"), ok = file:write_file(File, <<>>), [<<"H = qlc:q([X || X <- qlc:keysort([1], [{1},{2},{1}], [{tmpdir,\"">>, File, <<"\"}, {size,1}])]), {error,_,{file_error,_,_}} = qlc:e(H), file:delete(\"">>, File, <<"\")">>] end, <<"H0 = qlc:q([X || X <- [1,2,3]]), H = qlc:q([X || X <- qlc:sort(H0,{tmpdir,\".\"})]), [1,2,3] = qlc:e(H)">>, %% The global option 'tmpdir' takes precedence. begin PrivDir = ?privdir, [<<"L = [{1,a},{2,b}], H = qlc:q([X || X <- qlc:keysort([1], L, {tmpdir,\"/a/b/c\"})]), H1 = qlc:q([X || X <- H, X > 3]), Dir = \"">>, PrivDir, <<"\", Options = [{tmpdir, Dir}], {qlc,_,[{generate,_,{keysort,{list,L},[1],[{tmpdir,Dir}]}},_],[]} = i(H1, Options), [{1,a},{2,b}] = qlc:e(H1, Options)">>] % no check of "/a/b/c" end, <<"L = [{2,c},{1,b},{1,a},{3,a},{1,c},{2,b}], true = lists:sort(L) == qlc:e(qlc:q([X || X <- qlc:keysort([1,2], L)]))">>, <<"L = [{1,b},{2,c},{1,a},{3,e},{4,f},{3,d}], true = lists:keysort(1, L) == qlc:e(qlc:q([X || X <- qlc:keysort(1,L)])), true = lists:ukeysort(1, L) == qlc:e(qlc:q([X || X <- qlc:keysort(1, L, {unique,true})])), true = lists:reverse(lists:keysort(1, L)) == qlc:e(qlc:q([X || X <- qlc:keysort(1,L, {order, descending})])), true = lists:reverse(lists:ukeysort(1, L)) == qlc:e(qlc:q([X || X <- qlc:keysort(1, L, [{unique,true}, {order, descending}])]))">>, <<"L = [{X} || X <- lists:seq(1,100000)], H1 = qlc:append([L,[{1,2},{2,3},{3,4}]]), H = qlc:keysort([1], qlc:keysort([1], H1, [{compressed,true}])), R = qlc:e(H), 100003 = length(R)">> ], ?line run(Config, Ts), ok. filesort(doc) -> "keysort/1,2, using a file."; filesort(suite) -> []; filesort(Config) when is_list(Config) -> Ts = [ <<"Q = qlc:q([X || X <- [{3},{1},{2}]]), Opts = [{size,10},{no_files,3}], Q2 = qlc:q([{X,Y} || Y <- [1,2], X <- qlc:keysort([1],Q,Opts)]), [{{1},1},{{2},1},{{3},1},{{1},2},{{2},2},{{3},2}] = qlc:e(Q2)">> ], ?line run(Config, Ts), ok. cache(doc) -> "The cache option."; cache(suite) -> []; cache(Config) when is_list(Config) -> Ts = [ <<"{'EXIT', {badarg, _}} = (catch qlc:q([X || X <- [1,2]], badarg))">>, <<"Q1 = qlc:q([X || X <- [1,2,1,2,1]], {unique,true}), [1,2] = qlc:e(Q1), [1,2] = qlc:e(Q1, {unique_all,true}), Q2 = qlc:q([X || X <- qlc:q([X || X <- [1,2,1,2,1]], {unique,true})]), [1,2] = qlc:e(Q2), [1,2] = qlc:e(Q2, {unique_all,true}), Q3 = qlc:q([X || X <- qlc:append([[1,2,3], [4,5,6]])]), [1,2,3,4,5,6] = qlc:e(Q3)">>, <<"Q1 = qlc:q([X || {X,_} <- [{1,a},{2,a},{1,b},{2,b}]]), Q2 = qlc:q([{X,make_ref()} || X <- Q1]), [{1,_},{2,_},{1,_},{2,_}] = qlc:e(Q2, {unique_all,false}), [{1,_},{2,_}] = qlc:e(Q2, {unique_all,true})">>, <<"E = ets:new(test, [duplicate_bag]), true = ets:insert(E, [{1,a},{2,a},{1,b},{2,b}]), Q1 = qlc:q([X || {X,_} <- ets:table(E)]), Q2 = qlc:q([{X,make_ref()} || X <- Q1]), [{1,_},{1,_},{2,_},{2,_}] = lists:sort(qlc:e(Q2, {unique_all,false})), [{1,_},{2,_}] = lists:sort(qlc:e(Q2, {unique_all,true})), ets:delete(E)">>, <<"Q1 = qlc:q([X || {X,_} <- [{1,a},{2,a},{1,b},{2,b}]]), Q2 = qlc:q([{X,make_ref()} || X <- qlc:append([Q1, Q1])]), [{1,_},{2,_},{1,_},{2,_},{1,_},{2,_},{1,_},{2,_}] = qlc:e(Q2, {unique_all,false}), [{1,_},{2,_}] = qlc:e(Q2, {unique_all,true})">>, <<"[] = qlc:e(qlc:q([X || X <- []], {unique, true})), [] = qlc:e(qlc:q([X || X <- qlc:q([X || X <- qlc:append([])], {unique,true})]))">>, <<"Q1 = qlc:q([{X,make_ref()} || {X,_} <- [{1,a},{1,b}]]), [{1,_},{1,_}] = qlc:e(Q1, {unique_all, true}), Q2 = qlc:q([Y || {X,_} <- [{1,a},{1,b}], begin Y = {X,make_ref()}, true end]), [{1,_},{1,_}] = qlc:e(Q2, {unique_all,true}), Q3 = qlc:q([Y || X <- [{1,a},{2,a}], begin {_,Z} = X, Y = {Z,make_ref()}, true end]), [{a,_},{a,_}] = qlc:e(Q3, {unique_all, true})">>, <<"E = ets:new(apa, [duplicate_bag]), ets:insert(E, [{1,a},{2,a},{1,a}]), H1 = qlc:q([X || X <- qlc:append(ets:table(E),[7,3,5])], {cache, true}), [{_,a},{_,a},{_,a},7,3,5] = qlc:e(H1), ets:delete(E)">>, <<"F = fun(Obj, A) -> A++[Obj] end, H = qlc:q([X || X <- [1,3,2,4]], cache), Q = qlc:q([X || X <- H]), [1,3,2,4] = qlc:fold(F, [], Q, [])">>, <<"F = fun(Obj, A) -> A++[Obj] end, E = ets:new(apa, [duplicate_bag]), true = ets:insert(E, [{1,a},{2,b},{1,a}]), Q1 = qlc:q([X || X <- ets:table(E)], [cache, unique]), Q = qlc:q([X || X <- Q1], [cache, unique]), {qlc, _, [{generate, _,{table,_}}], [{unique,true}]} = i(Q), R = qlc:fold(F, [], Q, []), ets:delete(E), true = [{1,a},{2,b}] == lists:sort(R)">>, <<"E = ets:new(apa, [duplicate_bag]), ets:insert(E, [{1,a},{2,b},{1,a}]), H1 = qlc:q([X || X <- qlc:append(ets:table(E),[7,3])], cache), H2 = qlc:q([{Y,X} || Y <- [2,1,3], X <- H1]), [{2,_},{2,_},{2,_},{2,7},{2,3}, {1,_},{1,_},{1,_},{1,7},{1,3}, {3,_},{3,_},{3,_},{3,7},{3,3}] = qlc:e(H2), ets:delete(E)">>, %% This case is not 100 percent determined. An Ets table %% is updated in a filter and later used in a generator. <<"E = ets:new(apa, [bag]), true = ets:insert(E, [{1,a},{2,b}]), H1 = qlc:q([Y || Y <- ets:table(E)], [{cache, no}, {unique, true}]), H = qlc:q([{X,Y} || X <- [{1,a},{2,d},{3,e}], ets:insert(E, X), Y <- H1]), [{{1,a},_}, {{1,a},_}, {{2,d},_}, {{2,d},_}, {{2,d},_}, {{3,e},_}, {{3,e},_}, {{3,e},_}, {{3,e},_}] = qlc:e(H), ets:delete(E)">>, %% This case is not 100 percent determined. An Ets table %% is updated in a filter and later used in a generator. <<"E = ets:new(apa, [bag]), true = ets:insert(E, [{1,a},{2,b}]), H1 = qlc:q([Y || Y <- ets:table(E)], [{cache, true}, {unique, true}]), H = qlc:q([{X,Y} || X <- [{1,a},{2,d},{3,e}], ets:insert(E, X), Y <- H1]), [{{1,a},_}, {{1,a},_}, {{2,d},_}, {{2,d},_}, {{3,e},_}, {{3,e},_}] = qlc:e(H), ets:delete(E)">>, <<"%% {5979} and {5549} are both hashed to 28244 by phash2/1 E = ets:new(apa, [duplicate_bag]), true = ets:insert(E, [{5979},{5549},{5979},{5549},{0}]), H1 = qlc:q([X || X <- ets:table(E)], [{cache, true}, {unique, true}]), H = qlc:q([Y || _ <- [1,2], Y <- H1]), {qlc, _, [{generate, _, {list, [1,2]}}, {generate, _, {qlc, _, [{generate, _, {table,_}}], [{cache,ets},{unique,true}]}}], []} = i(H), [{0},{0},{5549},{5549},{5979},{5979}] = lists:sort(qlc:e(H)), ets:delete(E)">>, <<"E = ets:new(apa, [ordered_set]), ets:insert(E, [{1},{2}]), H1 = qlc:q([X || X <- ets:table(E)], [cache, unique]), H2 = qlc:q([X || Y <- [3,4], ets:insert(E, {Y}), X <- H1]), {qlc, _, [{generate, _, {list, [3,4]}}, _, {generate, _, {qlc, _, [{generate, _, {table, _}}], [{cache, ets}]}}], []} = i(H2), [{1},{2},{3},{1},{2},{3}] = qlc:e(H2), ets:delete(E)">>, <<"E = ets:new(apa, [ordered_set]), ets:insert(E, [{1},{2}]), H1 = qlc:q([X || X <- ets:table(E)], [unique]), H2 = qlc:q([X || Y <- [3,4], ets:insert(E, {Y}), X <- H1]), [{1},{2},{3},{1},{2},{3},{4}] = qlc:e(H2), ets:delete(E)">>, <<"H0 = qlc:append([a,b], [c,d]), H = qlc:q([{X,Y} || X <- H0, Y <- qlc:q([{X1,Y} || X1 <- H0, Y <- qlc:q([{X2,Y} || X2 <- H0, Y <- H0])])]), {qlc, _, [{generate, _,{append, [{list, [a,b]}, {list, [c,d]}]}}, {generate, _, {qlc, _, [{generate, _, {append,[{list, [a,b]},{list, [c,d]}]}}, {generate, _, {qlc, _, [{generate, _,{append,[{list, [a,b]}, {list, [c,d]}]}}, {generate, _,{append,[{list, [a,b]}, {list, [c,d]}]}}], [{cache,ets}]}}], [{cache,ets}]}}], []} = i(H, cache_all)">> ], ?line run(Config, Ts), ok. cache_list(doc) -> "OTP-6038. The {cache,list} option."; cache_list(suite) -> []; cache_list(Config) when is_list(Config) -> Ts = [ begin PrivDir = ?privdir, [<<"%% unique, cache list. A simple qlc. Options = [{cache,list}, unique], L0 = [1,2,3,4,1,2,3,4], L = qlc_SUITE:table(L0, []), Q1 = qlc:q([X || X <- L], Options), Q = qlc:q([{X,Y} || X <- [a,b], Y <- Q1]), GOptions = [{tmpdir,\"">>, PrivDir, <<"\"}], {qlc,_,[{generate,_,{list,[a,b]}}, {generate,_,{qlc,_, [{generate,_,{table,_}}], [{cache,list},{unique,true}]}}], []} = i(Q, GOptions), true = [{X,Y} || X <- [a,b], Y <- [1,2,3,4]] =:= qlc:e(Q, GOptions)">>] end, begin MS = ets:fun2ms(fun({X,_}) when X > 1 -> X end), [<<"%% No cache, even if explicit match specification. etsc(fun(E) -> MS = ">>, io_lib:format("~w", [MS]), <<", Options = [{cache,list}, unique], Q = qlc:q([{X,Y} || X <- ets:table(E, {traverse, {select, MS}}), Y <- [1,2,3]], Options), {qlc,_,[{generate,_,{table,{ets,table,_}}}, {generate,_,{list,[1,2,3]}}], [{unique,true}]} = i(Q), true = [{X,Y} || X <- lists:seq(2,10), Y <- [1,2,3]] =:= lists:sort(qlc:e(Q)) end, [{keypos,1}], [{I,a} || I <- lists:seq(1, 10)])">>] end, <<"%% Temporary files. %% Remove list expression caches when possible. (no visible effect) T = lists:seq(1, 100000), % Huge terms on file F = fun(C) -> Q0 = qlc:q([{X} || X <- [T,T,T], begin X > 0 end], {cache,C}), Q1 = qlc:q([{X,Y,Z} || X <- Q0, Y <- Q0, Z <- Q0], {cache,C}), qlc:q([{X, Y} || Y <- [1], X <- Q1]) end, Ql = F(list), Rl = qlc:e(Ql, {max_list_size, 64*1024}), Qe = F(ets), Re = qlc:e(Qe), Qf = F(no), Rf = qlc:e(Qf), Ri = qlc:e(Ql, {max_list_size, 1 bsl 35}), % heavy {27,27,27,27,true,true,true} = {length(Rl), length(Re), length(Rf), length(Ri), Rl =:= Re, Re =:= Rf, Rf =:= Ri}">>, <<"%% File sorter. T = lists:seq(1, 10000), F = fun(C) -> Q0 = qlc:q([{X} || X <- [T,T,T], begin X > 0 end], [{cache,C},unique]), Q1 = qlc:q([{X,Y,Z} || X <- Q0, Y <- Q0, Z <- Q0], [{cache,C},unique]), qlc:q([{X, Y} || Y <- [1], X <- Q1]) end, GOpt = [{max_list_size, 10000}], Ql = F(list), Rl = qlc:e(Ql, GOpt), Qe = F(ets), Re = qlc:e(Qe, GOpt), Qf = F(no), Rf = qlc:e(Qf, GOpt), {1,1,1,true,true} = {length(Rl), length(Re), length(Rf), Rl =:= Re, Re =:= Rf}">>, <<"%% Remove list expression caches when possible. (no visible effect) Q0 = qlc:q([{X} || X <- [1,2,3], begin X > 0 end], {cache,list}), Q1 = qlc:q([{X,Y,Z} || X <- Q0, Y <- Q0, Z <- Q0], {cache,list}), Q = qlc:q([{X, Y} || Y <- [1], X <- Q1]), R = qlc:e(Q), L0 = [{X} || X <- [1,2,3], begin X > 0 end], L1 = [{X,Y,Z} || X <- L0, Y <- L0, Z <- L0], L = [{X, Y} || Y <- [1], X <- L1], true = R =:= L">>, <<"%% No temporary file. L = [{I,a} || I <- lists:seq(1, 10)], Q0 = qlc:q([X || X <- qlc_SUITE:table_error(L, 1, err), begin element(1, X) > 5 end], {cache,list}), Q = qlc:q([{X, element(1,Y)} || X <- lists:seq(1, 5), Y <- Q0]), err = qlc:e(Q)">>, <<"%% Sort internally. L = [{I,a} || I <- lists:seq(1, 10)], Q0 = qlc:q([X || X <- qlc_SUITE:table_error(L, 1, err), begin element(1, X) > 5 end], [unique,{cache,list}]), Q = qlc:q([{X, element(1,Y)} || X <- lists:seq(1, 5), Y <- Q0]), err = qlc:e(Q, {max_list_size,0})">>, <<"%% No temporary file. etsc(fun(E) -> Q0 = qlc:q([X || X <- ets:table(E), begin element(1, X) > 5 end], {cache,list}), Q = qlc:q([{X, element(1,Y)} || X <- lists:seq(1, 5), Y <- Q0]), R = [{X,Y} || X <- lists:seq(1, 5), Y <- lists:seq(6, 10)], R = lists:sort(qlc:e(Q)) end, [{keypos,1}], [{I,a} || I <- lists:seq(1, 10)])">>, <<"%% Sort internally etsc(fun(E) -> Q0 = qlc:q([X || X <- ets:table(E), begin element(1, X) > 5 end], [{cache,list},unique]), Q = qlc:q([{X, element(1,Y)} || X <- lists:seq(1, 5), Y <- Q0]), R = [{X,Y} || X <- lists:seq(1, 5), Y <- lists:seq(6, 10)], R = lists:sort(qlc:e(Q)) end, [{keypos,1}], [{I,a} || I <- lists:seq(1, 10)])">>, <<"%% A few more tests of unique and {cache,list}. F = fun(CU) -> H1 = qlc:q([{X,Y} || Y <- [a,b], X <- [1,2]], CU), qlc:q([{X,Y,Z} || X <- [3,4], {Y,Z} <- H1]) end, Q1 = F([]), Q2 = F([{cache,list}, unique]), R1 = qlc:e(Q1), R2 = qlc:e(Q2), R3 = qlc:e(Q2, {max_list_size, 0}), % still in RAM true = R1 =:= R2, true = R2 =:= R3">>, <<"E = ets:new(t, [duplicate_bag]), true = ets:insert(E, [{2},{1},{2}]), H1 = qlc:q([{X,Y} || Y <- [a,b], {X} <- ets:table(E)], [{cache,list}, unique]), H2 = qlc:q([{X,Y,Z} || X <- [3,4], {Y,Z} <- H1]), {qlc,_,[{generate,_,{list,[3,4]}}, {generate,_,{qlc,_, [{generate,_,{list,[a,b]}}, {generate,_, {qlc,_,[{generate,_,{table,{ets,table,_}}}], [{cache,list},{unique,true}]}}], [{cache,list},{unique,true}]}}], []} = i(H2), L1s = [[{X,Y} || Y <- [a,b], X <- Xs] || Xs <- [[1,2], [2,1]]], L2s = [[{X,Y,Z} || X <- [3,4], {Y,Z} <- L1] || L1 <- L1s], R1 = qlc:e(H2), R2 = qlc:e(H2, {max_list_size, 0}), % on temporary file ets:delete(E), true = lists:member(R1, L2s), true = R1 =:= R2">>, <<"E = ets:new(t, [duplicate_bag]), true = ets:insert(E, [{2},{1},{2}]), H1 = qlc:q([{X,Y} || Y <- [a,b], {X} <- ets:table(E)], [{cache,list}]), H2 = qlc:q([{X,Y,Z} || X <- [3,4], {Y,Z} <- H1]), L1s = [[{X,Y} || Y <- [a,b], X <- Xs] || Xs <- [[1,2,2], [2,2,1]]], L2s = [[{X,Y,Z} || X <- [3,4], {Y,Z} <- L1] || L1 <- L1s], R1 = qlc:e(H2), R2 = qlc:e(H2, {max_list_size, 0}), % on temporary file ets:delete(E), true = lists:member(R1, L2s), true = R1 =:= R2">>, <<"Q1 = qlc:q([{X,Y} || Y <- [a,b], {X,_} <- qlc_SUITE:table_error([{a,1}], 2, err)], [{cache,list}, unique]), Q = qlc:q([{X,Y,Z} || X <- [3,4], {Y,Z} <- Q1]), {qlc,_,[{generate,_,{list,[3,4]}}, {generate,_,{qlc,_, [{generate,_,{list,[a,b]}}, {generate,_,{table,_}}], [{cache,list},{unique,true}]}}], []} = i(Q), err = qlc:e(Q,{max_list_size,0})">>, begin Privdir = ?privdir, [<<" E = ets:new(t, [duplicate_bag]), N = 17000, true = ets:insert(E, [{X,X} || X <- lists:seq(1, N)]), N = ets:info(E, size), RF = fun(GOpts) -> F = fun(CU) -> H1 = qlc:q([{X,Y} || Y <- [a,b], {X,_} <- ets:table(E)], CU), qlc:q([{X,Y,Z} || X <- [3,4], {Y,Z} <- H1]) end, Q1 = F([{cache,list}, unique]), _ = qlc:info(Q1, GOpts), R1 = qlc:e(Q1, GOpts), Q2 = F([unique]), R2 = qlc:e(Q2, GOpts), true = lists:sort(R1) =:= lists:sort(R2) end, GOpts = [{tmpdir,\"">>,Privdir,<<"\"}], RF([{max_list_size, 1 bsl 35} | GOpts]), RF(GOpts), RF([{max_list_size, 40000} | GOpts]), true = ets:insert(E, [{X,X} || X <- lists:seq(1, N)]), true = N+N =:= ets:info(E, size), RF([{max_list_size, 1 bsl 30} | GOpts]), RF(GOpts), RF([{max_list_size, 40000} | GOpts]), ets:delete(E)">>] end, <<"%% Temporary file employed. etsc(fun(E) -> Q0 = qlc:q([X || X <- ets:table(E), begin element(1, X) > 5 end], {cache,list}), Q = qlc:q([{X, element(1,Y)} || X <- lists:seq(1, 5), Y <- Q0]), R = [{X,Y} || X <- lists:seq(1, 5), Y <- lists:seq(6, 10)], R = lists:sort(qlc:e(Q, {max_list_size, 100*1024})) end, [{keypos,1}], [{I,a,lists:duplicate(100000,1)} || I <- lists:seq(1, 10)])">>, <<"%% Temporary file employed. The file is removed after error. L = [{I,a,lists:duplicate(100000,1)} || I <- lists:seq(1, 10)], Q0 = qlc:q([X || X <- qlc_SUITE:table_error(L, 1, err), begin element(1, X) > 5 end], {cache,list}), Q = qlc:q([{X, element(1,Y)} || X <- lists:seq(1, 5), Y <- Q0]), err = qlc:e(Q)">>, <<"%% Temporary file employed. The file is removed after error. L = [{I,a,lists:duplicate(100000,1)} || I <- lists:seq(1, 10)], Q0 = qlc:q([X || X <- qlc_SUITE:table(L, 1, []), begin element(1, X) > 5 end], {cache,list}), Q = qlc:q([{X, element(1,Y)} || X <- lists:seq(1, 5), Y <- Q0]), {error, _, {file_error,_,_}} = qlc:e(Q, {tmpdir, \"/a/b/c\"})">>, <<"Q = qlc:q([X || X <- [1,2]]), {'EXIT', {badarg, _}} = (catch qlc:e(Q, {max_list_size, -1}))">>, <<"Q = qlc:q([X || X <- [1,2]]), {'EXIT', {badarg, _}} = (catch qlc:e(Q, {max_list_size, foo}))">> ], ?line run(Config, Ts), ok. filter(doc) -> "Filters and match specs."; filter(suite) -> []; filter(Config) when is_list(Config) -> Ts = [ <<"L = [1,2,3,4,5], QH1 = qlc:q([X || X <- L, X > 1, X < 4]), [2,3] = qlc:e(QH1), {list,{list,L},_MS} = i(QH1) ">>, <<"L = [1,2,3,4,5], QH2 = qlc:q([X || X <- L, X > 1, X < 4, X > 2]), [3] = qlc:e(QH2), {list,{list,L},_MS} = i(QH2) ">>, %% "X > 1" is skipped since the matchspec does the job <<"QH3 = qlc:q([X || X <- [1,2,3,4,5], X > 1, begin X < 4 end]), [2,3] = qlc:e(QH3), {qlc,_,[{generate,_,{list,{list,[1,2,3,4,5]},_MS}},_],[]} = i(QH3) ">>, <<"QH4 = qlc:q([{X,Y} || X <- [1,2], Y <- [1,2]]), [{1,1},{1,2},{2,1},{2,2}] = qlc:e(QH4), {qlc,_,[{generate,_,{list,[1,2]}},{generate,_,{list,[1,2]}}],[]} = i(QH4)">>, %% "X > 1" is skipped since the matchspec does the job <<"QH5 = qlc:q([{X,Y} || X <- [1,2], X > 1, Y <- [1,2]]), [{2,1},{2,2}] = qlc:e(QH5), {qlc,_,[{generate,_,{list,{list,[1,2]},_MS}}, {generate,_,{list,[1,2]}}],[]} = i(QH5)">>, <<"%% Binaries are not handled at all when trying to find lookup values etsc(fun(E) -> A = 2, Q = qlc:q([X || {X} <- ets:table(E), <<A>> =:= <<X>>]), [2] = lists:sort(qlc:e(Q)), false = lookup_keys(Q) end, [{1},{2},{3}])">>, <<"etsc(fun(E) -> Q = qlc:q([X || {X,_} <- ets:table(E), qlc:e(qlc:q([Y || {Y,_} <- ets:table(E), Y > X])) == []]), [3] = qlc:e(Q) end, [{1,a},{2,b},{3,c}])">>, <<"Q = qlc:q([X || {X} <- [], (false or (X/0 > 3))]), \"[]\" = qlc:info(Q), [] = qlc:e(Q)">>, <<"%% match spec [] = qlc:e(qlc:q([X || {X} <- [{1},{2}], (false orelse (X/0 > 3))])), %% generated code {'EXIT', {badarith, _}} = (catch qlc:e(qlc:q([X || {X} <- [{1}], begin (false orelse (X/0 > 3)) end])))">>, <<"%% Partial evaluation in filter. etsc(fun(E) -> QH = qlc:q([{X+1,Y} || {X,Y} <- ets:table(E), X =:= 1-1+1+(+1)]), [{3,2}] = qlc:e(QH), [2] = lookup_keys(QH) end, [{1,1},{2,2},{3,3}])">>, <<"%% =/2 in filters must not be recognized when 'badmatch' is %% possible. etsc(fun(E) -> QH = qlc:q([{X,Y} || {X,Y} <- ets:table(E), ((Y = X) =:= 3)]), {'EXIT', {{badmatch,4},_}} = (catch qlc:e(QH)), false = lookup_keys(QH) end, [{3,3},{4,true}])">>, <<"%% One more of the same kind. etsc(fun(E) -> QH = qlc:q([{X,Y} || {X,_} <- ets:table(E), (Y=X) =:= (Y=1+1)]), {'EXIT', {{badmatch,2},_}} = (catch qlc:e(QH)), false = lookup_keys(QH) end, [{1,1},{2,2},{3,3}])">>, <<"%% OTP-5195. Used to return a value, but badarith is correct. etsc(fun(E) -> QH = qlc:q([X || {X,_} <- ets:table(E), (X =:= 1) and if X =:= 1 -> true; true -> X/0 end]), {'EXIT',{badarith,_}} = (catch qlc:e(QH)), false = lookup_keys(QH) end, [{1,1},{2,2},{3,3}])">>, <<"fun(Z) -> Q = qlc:q([X || Z < 2, X <- [1,2,3]]), [] = qlc:e(Q) end(3)">>, <<"H = qlc:q([{P1,A,P2,B,P3,C} || P1={A,_} <- [{1,a},{2,b}], {_,B}=P2 <- [{1,a},{2,b}], C=P3 <- [1], {[X,_],{_,X}} <- [{[1,2],{3,1}}, {[a,b],{3,4}}], A > 0, B =/= c, C > 0]), L = [{{1,a},1,{1,a},a,1,1}, {{1,a},1,{2,b},b,1,1}, {{2,b},2,{1,a},a,1,1}, {{2,b},2,{2,b},b,1,1}], L = qlc:e(H)">>, <<"H = qlc:q([{X,Y} || X = _ <- [1,2,3], _ = Y <- [a,b,c], _ = _ <- [foo], X > 1, Y =/= a]), [{2,b},{2,c},{3,b},{3,c}] = qlc:e(H)">> ], ?line run(Config, Ts), ok. info(doc) -> "info/2."; info(suite) -> []; info(Config) when is_list(Config) -> Ts = [ <<"{list, [1,2]} = i(qlc:q([X || X <- [1,2]])), {append,[{list, [1,2]}, {list, [3,4]}]} = i(qlc:append([1,2],[3,4])), {sort,{list, [1,2]},[]} = i(qlc:sort([1,2])), E = ets:new(foo, []), ets:insert(E, [{1},{2}]), {table, _} = i(ets:table(E)), true = ets:delete(E), {list, [1,2]} = i([1,2]), {append, [{list, [1,2]}, {list, [3,4]}]} = i(qlc:q([X || X <- qlc:append([1,2],[3,4])])), H0 = qlc:q([X || X <- throw({throw,t})]), {throw,t} = (catch {any_term,qlc:info(H0)}), {'EXIT', {badarg, _}} = (catch qlc:info(foobar)), {'EXIT', {badarg, _}} = (catch qlc:info(qlc:q([X || X <- [1,2]]), badarg))">>, <<"{'EXIT', {badarg, _}} = (catch qlc:info([X || {X} <- []], {n_elements, 0})), L = lists:seq(1, 1000), \"[1,2,3,4,5,6,7,8,9,10|'...']\" = qlc:info(L, {n_elements, 10}), {cons,1,{integer,1,1},{atom,1,'...'}} = qlc:info(L, [{n_elements, 1},{format,abstract_code}]), Q = qlc:q([{X} || X <- [a,b,c,d,e,f]]), {call,_,_,[{cons,_,{atom,_,a},{cons,_,{atom,_,b},{cons,_,{atom,_,c}, {atom,_,'...'}}}}, {call,_,_,_}]} = qlc:info(Q, [{n_elements, 3},{format,abstract_code}]), \"ets:match_spec_run([a,b,c,d,e,f],\n\" \" ets:match_spec_compile([{'$1',[true],\" \"[{{'$1'}}]}]))\" = qlc:info(Q, [{n_elements, infinity}])">>, <<"Q1 = qlc:q([{X} || X <- qlc:q([X || X <- [1,2]])]), {qlc, _, [{generate, _, {list, [1,2]}}],[]} = i(Q1), Q2 = qlc:q([X || X <- qlc:q([{X} || X <- [1,2]])]), {list,{list,[1,2]},_} = i(Q2), [{1},{2}] = qlc:eval(Q2), Q3 = qlc:q([{X,Y} || X <- qlc:q([X || X <- [a,b]]), Y <- qlc:q([Z || Z <- [a,b]])]), {qlc, _, [{generate, _, {list, [a,b]}}, {generate, _, {list, [a,b]}}], []} = i(Q3), Q4 = qlc:q([X || X <- [a]]), {list, [a]} = i(Q4), Q5 = qlc:q([X || X <- qlc:q([Y || Y <- [a,b]], unique)]), {qlc, _, [{generate, _, {list, [a,b]}}], [{unique,true}]} = i(Q5)">>, <<"H = qlc:q([X || X <- qlc:append([qlc:q([X || X <- [1,2]]),[1,2]])]), {append, [{list, [1,2]},{list, [1,2]}]} = i(H), [1,2,1,2] = qlc:e(H)">>, <<"H = qlc:q([{X} || X <- [], X > 1]), {list, []} = i(H), [] = qlc:e(H)">>, <<"H1 = qlc:q([{X} || X <- [], X > 1]), H = qlc:q([{X} || X <- H1, X < 10]), {list, []} = i(H), [] = qlc:e(H)">>, <<"L = [1,2,3], QH1 = qlc:q([{X} || X <- L, X > 1]), QH2 = qlc:q([{X} || X <- QH1]), [{{2}},{{3}}] = qlc:e(QH2), {list,{list,{list,L},_},_} = i(QH2)">>, <<"H = qlc:q([X || X <- qlc:q([Y || Y <- qlc:q([Z || Z <-[1,2,1]])])]), {list, [1,2,1]} = i(H), [1,2,1] = qlc:eval(H)">>, <<"%% Used to replace empty ETS tables with [], but that won't work. E = ets:new(apa,[]), QH1 = qlc:q([{X} || X <- ets:table(E), X > 1]), QH2 = qlc:q([{X} || X <- QH1], cache), [] = qlc:e(QH2), {qlc,_,[{generate,_,{table,{ets,table,_}}}],[]} = i(QH2), ets:delete(E)">>, <<"Q1 = qlc:q([W || W <- [a,b]]), Q2 = qlc:q([Z || Z <- qlc:sort([55296,56296,57296])], unique), Q3 = qlc:q([{X,Y} || X <- qlc:keysort([2], [{1,a}]), Y <- qlc:append([Q1, Q2]), X > Y]), {qlc, T1, [{generate, P1, {list, [{1,a}]}}, {generate, P2, {append, [{list, [a,b]}, {qlc, T2, [{generate, P3, {sort, {list,[55296,56296,57296]},[]}}], [{cache,ets},{unique,true}]}]}},F], []} = i(Q3, cache_all), {tuple, _, [{var,_,'X'}, {var,_,'Y'}]} = binary_to_term(T1), {var, _, 'X'} = binary_to_term(P1), {var, _, 'Y'} = binary_to_term(P2), {var, _, 'Z'} = binary_to_term(P3), {var, _, 'Z'} = binary_to_term(T2), {op, _, '>', {var, _, 'X'}, {var, _, 'Y'}} = binary_to_term(F), true = binary_to_list(<< \"beginV1=qlc:q([Z||Z<-qlc:sort([55296,56296,57296],[])],[{unique,true}]),\" \"qlc:q([{X,Y}||X<-[{1,a}],Y<-qlc:append([[a,b],V1]),X>Y])end\" >>) == format_info(Q3, true)">>, <<"Q1 = qlc:q([{X} || X <- qlc:q([X || X <- [a,b]])]), {qlc, _, [{generate, _, {list, [a,b]}}], []} = i(Q1), Q2 = qlc:q([X || X <- qlc:q([{X} || X <- [a,b]])]), {list,{list,[a,b]},_} = i(Q2), [{a},{b}] = qlc:eval(Q2)">>, <<"Q = qlc:keysort(2, [{1,a,b},{2,b,c},{3,4,c}]), {keysort,{list,[{1,a,b},{2,b,c},{3,4,c}]},2,[]} = i(Q), true = binary_to_list(<< \"qlc:keysort(2,[{1,a,b},{2,b,c},{3,4,c}],[])\">>) == format_info(Q, true), [{3,4,c},{1,a,b},{2,b,c}] = qlc:e(Q)">>, <<"E = ets:new(foo, []), ets:insert(E, [{1},{2}]), Q = qlc_SUITE:default_table(E), {table,{'$MOD','$FUN',[]}} = i(Q), true = binary_to_list(<<\"'$MOD':'$FUN'()\">>) == format_info(Q, true), true = ets:delete(E)">>, <<"\"[]\" = qlc:info([], flat), \"[]\" = qlc:info([]), \"[]\" = qlc:info([], {flat, true})">>, <<"H = qlc:q([{X} || X <- [a,b]]), \"ets:match_spec_run([a,b],ets:match_spec_compile(\" ++ _ = format_info(H, true), \"ets:match_spec_run([a,b],ets:match_spec_compile(\" ++ _ = format_info(H, false)">>, <<"H = qlc:q([{X} || X <- [a,b], begin true end]), true = binary_to_list(<<\"qlc:q([{X}||X<-[a,b],begintrueend])\">>) == format_info(H, true), true = binary_to_list(<<\"qlc:q([{X}||X<-[a,b],begintrueend])\">>) == format_info(H, false)">>, <<"H = qlc:q([A || {A} <- [{1},{2}], (A =:= 2) andalso true]), {call,_,{remote,_,{atom,_,ets},{atom,_,match_spec_run}},_} = qlc:info(H, {format,abstract_code})">>, <<"H = qlc:q([{X} || X <- qlc:q([{X} || X <- [a,b], begin true end], unique), begin true end]), true = binary_to_list(<< \"beginV1=qlc:q([{X}||X<-[a,b],begintrueend],[{unique,true}]),\" \"qlc:q([{X}||X<-V1,begintrueend])end\">>) == format_info(H, true), true = binary_to_list(<< \"qlc:q([{X}||X<-qlc:q([{X}||X<-[a,b],begintrueend],\" \"[{unique,true}]),begintrueend])\">>) == format_info(H, false)">>, <<"H0 = qlc:q([{V3} || V3 <- qlc:q([{V1} || V1 <- [a,b], begin true end], unique), begin true end]), H = qlc:sort(H0), true = binary_to_list(<< \"qlc:sort(qlc:q([{V3}||V3<-qlc:q([{V1}||\" \"V1<-[a,b],begintrueend],[{unique,true}]),begintrueend]),[])\">>) == format_info(H, false), true = binary_to_list(<< \"beginV2=qlc:q([{V1}||V1<-[a,b],begintrueend],[{unique,true}]),\" \"V4=qlc:q([{V3}||V3<-V2,begintrueend]),qlc:sort(V4,[])end\">>) == format_info(H, true)">>, <<"H0 = qlc:q([X || X <- [true], begin true end]), H1 = qlc:q([{X} || X <- [a,b], begin true end], [{unique,begin [T] = qlc:e(H0), T end}]), {call,_,{remote,_,{atom,_,qlc},{atom,_,q}}, [{lc,_,{tuple,_,[{var,_,'X'}]}, [{generate,_,{var,_,'X'}, {cons,_,{atom,_,a},_}}, {block, _, [{atom, _, true}]}]}, {cons,_,_,_}]} = i(H1, {format, abstract_code})">>, <<"E = ets:new(apa, [duplicate_bag]), true = ets:insert(E, [{1,a},{2,b},{3,c},{4,d}]), QH = qlc:q([X || {X,_} <- ets:tab2list(E), X > 2], unique), {qlc, _, [{generate, _, {list, _, _MS}}], [{unique, true}]} = i(QH), [3,4] = lists:sort(qlc:e(QH)), ets:delete(E)">>, %% "Imported" variable. <<"F = fun(U) -> qlc:q([{X} || X <- [1,2,3,4,5,6], X > U]) end, QH = F(4), {call, _ , {remote, _, {atom, _, ets},{atom, _, match_spec_run}}, [{string, _, [1,2,3,4,5,6]}, {call, _, _compile, [{cons, _, {tuple, _, [{atom, _,'$1'}, {cons, _, {tuple, _, [{atom, _,'>'}, {atom, _,'$1'}, {tuple, _, [{atom, _,const}, {integer, _,4}]}]}, _}, {cons, _, _, _}]}, {nil,_}}]}]} = i(QH, {format, abstract_code}), [{5},{6}] = qlc:e(QH), [{4},{5},{6}] = qlc:e(F(3))">> ], ?line run(Config, Ts), ok. nested_info(doc) -> "Nested QLC expressions. QLC expressions in filter and template."; nested_info(suite) -> []; nested_info(Config) when is_list(Config) -> Ts = [ <<"L = [{1,a},{2,b},{3,c}], Q = qlc:q( [{X,R} || {X,_} <- qlc_SUITE:table(L, []), begin % X imported R = qlc:e(qlc:q([{X,Y} || {Y,_} <- qlc_SUITE:table(L, []), Y > X])), true end]), true = binary_to_list(<< \"qlc:q([{X,R}||{X,_}<-qlc_SUITE:the_list([{1,a},{2,b},{3,c}]),\" \"beginR=qlc:e(qlc:q([{X,Y}||{Y,_}<-qlc_SUITE:table(L,[]),Y>X]))\" \",trueend])\">>) == format_info(Q, true), [{1,[{1,2},{1,3}]},{2,[{2,3}]},{3,[]}] = qlc:e(Q)">>, <<"L = [{1,a},{2,b},{3,c}], Q = qlc:q( % X imported [{X,qlc:e(qlc:q([{X,Y} || {Y,_} <- qlc_SUITE:table(L, []), Y > X]))} || {X,_} <- qlc_SUITE:table(L, [])]), true = binary_to_list(<< \"qlc:q([{X,qlc:e(qlc:q([{X,Y}||{Y,_}<-qlc_SUITE:table(L,[]),\" \"Y>X]))}||{X,_}<-qlc_SUITE:the_list([{1,a},{2,b},{3,c}])])\">>) == format_info(Q, true), [{1,[{1,2},{1,3}]},{2,[{2,3}]},{3,[]}] = qlc:e(Q)">>, <<"L = [{1,a},{2,b},{3,c}], Q = qlc:q( [{X,R} || {X,_} <- qlc_SUITE:table(L, []), begin % X imported R = qlc:e(qlc:q([{X,Y} || {Y,_} <- qlc_SUITE:table(L, []), Y =:= X])), true end]), true = binary_to_list(<< \"qlc:q([{X,R}||{X,_}<-qlc_SUITE:the_list([{1,a},{2,b},{3,c}]),\" \"beginR=qlc:e(qlc:q([{X,Y}||{Y,_}<-qlc_SUITE:table(L,[]),\" \"Y=:=X])),trueend])\">>) == format_info(Q, true), [{1,[{1,1}]},{2,[{2,2}]},{3,[{3,3}]}] = qlc:e(Q)">>, <<"L = [{1,a},{2,b},{3,c}], Q = qlc:q( [{X, % X imported qlc:e(qlc:q([{X,Y} || {Y,_} <- qlc_SUITE:table(L, []), Y =:= X]))} || {X,_} <- qlc_SUITE:table(L, [])]), true = binary_to_list(<< \"qlc:q([{X,qlc:e(qlc:q([{X,Y}||{Y,_}<-qlc_SUITE:table(L,[]),\" \"Y=:=X]))}||{X,_}<-qlc_SUITE:the_list([{1,a},{2,b},{3,c}])])\">>) == format_info(Q, true), [{1,[{1,1}]},{2,[{2,2}]},{3,[{3,3}]}] = qlc:e(Q)">>, <<"L = [{1,a},{2,b},{3,c}], Q = qlc:q( [{X,R} || {X,_} <- qlc_SUITE:table(L, []), begin R = qlc:e(qlc:q([Y || Y <- [X]])), true end]), true = binary_to_list(<< \"qlc:q([{X,R}||{X,_}<-qlc_SUITE:the_list([{1,a},{2,b},{3,c}]),\" \"beginR=qlc:e(qlc:q([Y||Y<-[X]])),trueend])\">>) == format_info(Q, true), [{1,[1]},{2,[2]},{3,[3]}] = qlc:e(Q)">>, <<"L = [{1,a},{2,b},{3,c}], Q = qlc:q( [{X,qlc:e(qlc:q([Y || Y <- [X]]))} || {X,_} <- qlc_SUITE:table(L, [])]), true = binary_to_list(<< \"qlc:q([{X,qlc:e(qlc:q([Y||Y<-[X]]))}||{X,_}<-qlc_SUITE:\" \"the_list([{1,a},{2,b},{3,c}])])\">>) == format_info(Q, true), [{1,[1]},{2,[2]},{3,[3]}] = qlc:e(Q)">>, <<"L = [{1,a},{2,b}], Q = qlc:q( [{X,Y} || {X,_} <- qlc_SUITE:table(L, []), {Y,_} <- qlc:q( [{Z,V} || {Z,_} <- qlc_SUITE:table(L, []), {V} <- qlc:q( [{W} || W <- qlc_SUITE:table(L, [])]) ]) ]), true = binary_to_list(<< \"beginV1=qlc:q([{W}||W<-qlc_SUITE:the_list([{1,a},{2,b}])]),\" \"V2=qlc:q([{Z,V}||{Z,_}<-qlc_SUITE:the_list([{1,a},{2,b}]),\" \"{V}<-V1]),qlc:q([{X,Y}||{X,_}<-qlc_SUITE:the_list([{1,a},\" \"{2,b}]),{Y,_}<-V2])end\">>) == format_info(Q, true), [{1,1},{1,1},{1,2},{1,2},{2,1},{2,1},{2,2},{2,2}] = qlc:e(Q)">> ], ?line run(Config, Ts), ok. lookup1(doc) -> "Lookup keys. Mostly test of patterns."; lookup1(suite) -> []; lookup1(Config) when is_list(Config) -> Ts = [ <<"etsc(fun(E) -> Q = qlc:q([A || {A=3} <- ets:table(E)]), [3] = qlc:eval(Q), [3] = lookup_keys(Q) end, [{1},{2},{3},{4}])">>, <<"etsc(fun(E) -> Q = qlc:q([A || {A=3} <- ets:table(E)],{max_lookup,0}), [3] = qlc:eval(Q), false = lookup_keys(Q) end, [{1},{2},{3},{4}])">>, <<"%% The lookup and max_lookup options interact. etsc(fun(E) -> Q = qlc:q([X || {X} <- ets:table(E), (X =:= 1) or (X =:= 2)], [{lookup,true},{max_lookup,1}]), {'EXIT', {no_lookup_to_carry_out, _}} = (catch qlc:e(Q)) end, [{1},{2}])">>, <<"etsc(fun(E) -> Q = qlc:q([{A,B,C,D} || {A,B}={C,D} <- ets:table(E)]), [{1,2,1,2},{3,4,3,4}] = lists:sort(qlc:eval(Q)), false = lookup_keys(Q) end, [{1,2},{3,4}])">>, <<"etsc(fun(E) -> Q = qlc:q([{A,B,D} || {A,B}={D,A} <- ets:table(E)]), [{1,1,1},{2,2,2}] = lists:sort(qlc:eval(Q)), false = lookup_keys(Q) end, [{1,2},{2,2},{1,1}])">>, <<"etsc(fun(E) -> Q = qlc:q([{A,B,D} || {A,B}={D,A} <- ets:table(E), (D =:= 2) or (B =:= 1)], {max_lookup,infinity}), [{1,1,1},{2,2,2}] = qlc:eval(Q), [1,2] = lookup_keys(Q) end, [{1,2},{2,2},{1,1}])">>, <<"etsc(fun(E) -> Q = qlc:q([{A,B,D} || {A,B}={D,A} <- ets:table(E), (D =:= 2) xor (B =:= 1)]), [{1,1,1},{2,2,2}] = qlc:eval(Q), [1,2] = lookup_keys(Q) end, [{1,2},{2,2},{1,1}])">>, <<"etsc(fun(E) -> Q = qlc:q([3 || {{[3,4],apa}} <- ets:table(E)]), [3] = qlc:e(Q), [{[3,4],apa}] = lookup_keys(Q) end, [{{[4,3],foo}},{{[3,4],apa}}])">>, <<"etsc(fun(E) -> Q = qlc:q([3 || {3} <- ets:table(E)]), [3] = qlc:e(Q), [3] = lookup_keys(Q) end, [{2},{3},{4}])">>, <<"etsc(fun(E) -> Q = qlc:q([{X,Y,Z} || {{X,_},Y,Y={_,Z},X,Y} <- ets:table(E)]), [] = qlc:e(Q), false = lookup_keys(Q) end, [{{1,1},1,{1,1},1,1}])">>, <<"etsc(fun(E) -> Q = qlc:q([X || {X,X=2} <- ets:table(E)]), [2] = qlc:e(Q), [2] = lookup_keys(Q) end, [{2,2},{3,3}])">>, <<"etsc(fun(E) -> Q = qlc:q([X || {{_,3}={4,_}=X} <- ets:table(E)]), [{4,3}] = qlc:e(Q), [{4,3}] = lookup_keys(Q) end, [{{2,3}},{{4,3}}])">>, <<"U = 17.0, etsc(fun(E) -> Q = qlc:q([X || {_=X=_} <- ets:table(E)]), [U] = qlc:e(Q), false = lookup_keys(Q) end, [{U},{U+U,U}])">>, <<"etsc(fun(E) -> Q = qlc:q([{X,Y,Z,W} || {X=Y}=Z={V=W} <- ets:table(E), V == {h,g}]), [{{h,g},{h,g},{{h,g}},{h,g}}] = qlc:e(Q), [{h,g}] = lookup_keys(Q) end, [{h,g},{{h,g}}])">>, <<"etsc(fun(E) -> Q = qlc:q([{C,Y,Z,X} || {{X=Y}=Z}={{A=B}=C} <- ets:table(E), A == a, B =/= c]), [{{a},a,{a},a}] = qlc:e(Q), [{a}] = lookup_keys(Q) end, [{{1}},{{a}}])">>, <<"etsc(fun(E) -> Q = qlc:q([{A,D,Y,X} || {{A={B=C}},{D={C}}} = {X,Y} <- ets:table(E), [] == B]), [{{[]},{[]},{{[]}},{{[]}}}] = qlc:e(Q), [{{[]}}] = lookup_keys(Q) end, [{{{[]}},{{[]}}}])">>, {cres, <<"etsc(fun(E) -> Q = qlc:q([X || {X}=X <- ets:table(E)]), [] = qlc:e(Q), false = lookup_keys(Q) end, [{1},{a}])">>, {warnings,[{{2,37},qlc,nomatch_pattern}]}}, <<"etsc(fun(E) -> Q = qlc:q([X || {X=X,Y=Y}={Y=Y,X=X} <- ets:table(E), {} == X]), [{}] = qlc:e(Q), [{}] = lookup_keys(Q) end, [{{},{}},{[],[]}])">>, <<"etsc(fun(E) -> Q = qlc:q([X || {3+4=7,X} <- ets:table(E), X =:= 3+997]), [1000] = qlc:e(Q), [7] = lookup_keys(Q) end, [{7,1000},{8,1000}])">>, <<"etsc(fun(E) -> Q = qlc:q([{X, Y} || [X]=[Y] <- ets:table(E)]), [] = qlc:eval(Q), false = lookup_keys(Q) end, [{a}])">>, {cres, <<"etsc(fun(E) -> Q = qlc:q([X || X={1,2,3,X,5} <- ets:table(E)]), [] = qlc:e(Q), false = lookup_keys(Q) end, [{a},{b}])">>, {warnings,[{{2,35},qlc,nomatch_pattern}]}}, {cres, <<"etsc(fun(E) -> Q = qlc:q([X || X=[1,2,3,X,5] <- ets:table(E)]), [] = qlc:e(Q), false = lookup_keys(Q) end, [{a},{b}])">>, {warnings,[{{2,35},qlc,nomatch_pattern}]}}, <<"etsc(fun(E) -> Q = qlc:q([X || X = <<X>> <- ets:table(E)]), [] = qlc:e(Q), false = lookup_keys(Q) end, [{a},{b}])">>, <<"Tre = 3.0, etsc(fun(E) -> Q = qlc:q([{A,B} || {A,B}={{a,C},{a,C}} <- ets:table(E), C =:= Tre]), [] = qlc:e(Q), [{a,Tre}] = lookup_keys(Q) end, [{a,b}])">>, <<"A = 3, etsc(fun(E) -> Q = qlc:q([X || X <- ets:table(E), A =:= element(1, X)]), [{3,3}] = qlc:e(Q), [3] = lookup_keys(Q) end, [{1,a},{3,3}])">>, <<"A = 3, etsc(fun(E) -> Q = qlc:q([X || X <- ets:table(E), A =:= erlang:element(1, X)]), [{3,3}] = qlc:e(Q), [3] = lookup_keys(Q) end, [{1,a},{3,3}])">>, <<"etsc(fun(E) -> A = 3, Q = qlc:q([X || X <- ets:table(E), A == element(1,X), element(1,X) =:= a]), [] = qlc:e(Q), [a] = lookup_keys(Q) end, [{a},{b},{c}])">>, {cres, <<"etsc(fun(E) -> Q = qlc:q([X || {X = {[a,Z]}, Z = [foo, {[Y]}], Y = {{foo,[X]}}} <- ets:table(E)]), [] = qlc:e(Q), false = lookup_keys(Q) end, [{a,b,c},{d,e,f}])">>, {warnings,[{{2,34},qlc,nomatch_pattern}]}} ], ?line run(Config, Ts), ok. lookup2(doc) -> "Lookup keys. Mostly test of filters."; lookup2(suite) -> []; lookup2(Config) when is_list(Config) -> Ts = [ <<"%% Only guards are inspected. No lookup. etsc(fun(E) -> Q = qlc:q([{X,Y} || {X,Y} <- ets:table(E), ((Y = X) =:= 3)]), {'EXIT', {{badmatch,4},_}} = (catch qlc:e(Q)) end, [{3,3},{4,true}])">>, <<"%% Only guards are inspected. No lookup. etsc(fun(E) -> Q = qlc:q([{X,Y} || {X,Y} <- ets:table(E), Y = (X =:= 3)]), {'EXIT', {{badmatch,false},_}} = (catch qlc:e(Q)) end, [{false,3},{true,3}])">>, <<"%% Only guards are inspected. No lookup. etsc(fun(E) -> Q = qlc:q([{X,Y} || {X,Y} <- ets:table(E), Y = (X =:= 3)]), {'EXIT', {{badmatch,false},_}} = (catch qlc:e(Q)) end, [{3,true},{4,true}])">>, <<"%% Only guards are inspected. No lookup. E1 = create_ets(1, 10), E2 = ets:new(join, []), true = ets:insert(E2, [{true,1},{false,2}]), Q = qlc:q([{X,Z} || {_,X} <- ets:table(E1), {Y,Z} <- ets:table(E2), Y = (X =:= 3)]), {'EXIT', {{badmatch,false},_}} = (catch qlc:e(Q)), ets:delete(E1), ets:delete(E2)">>, <<"etsc(fun(E) -> Q = qlc:q([{A,B,D} || {A,B}={D,A} <- ets:table(E), (A =:= 3) or (4 =:= D)]), [{3,3,3},{4,4,4}] = lists:sort(qlc:e(Q)), [3,4] = lookup_keys(Q) end, [{2,2},{3,3},{4,4}])">>, <<"etsc(fun(E) -> Q = qlc:q([X || {X,U} <- ets:table(E), X =:= U]), [1] = qlc:e(Q), false = lookup_keys(Q) end, [{1,1}])">>, {cres, <<"etsc(fun(E) -> Q = qlc:q([{X,Y} || {X=Y} <- ets:table(E), {[X],4} =:= {[3],X}]), [] = qlc:e(Q), false = lookup_keys(Q) end, [{1}, {2}])">>, {warnings,[{{3,46},qlc,nomatch_filter}]}}, {cres, <<"etsc(fun(E) -> Q = qlc:q([X || {X} <- ets:table(E), X == 1, X =:= 2]), [] = qlc:e(Q), false = lookup_keys(Q) end, [{1}, {2}])">>, {warnings,[{{3,43},qlc,nomatch_filter}]}}, {cres, <<"etsc(fun(E) -> Q = qlc:q([{X,Y} || {X=Y} <- ets:table(E), {[X,Y],4} =:= {[3,X],X}]), [] = qlc:e(Q), false = lookup_keys(Q) end, [{1}, {2}])">>, {warnings,[{{3,48},qlc,nomatch_filter}]}}, <<"etsc(fun(E) -> Q = qlc:q([{X,Y} || {X,Y} <- ets:table(E), ({X,3} =:= {Y,Y}) or (X =:= 4)]), [{3,3},{4,4}] = lists:sort(qlc:e(Q)), [3,4] = lookup_keys(Q) end, [{2,2},{3,3},{4,4},{5,5}])">>, {cres, <<"etsc(fun(E) -> Q = qlc:q([X || {X} <- ets:table(E), {[X]} =:= {[3,4]}]), [] = qlc:e(Q), false = lookup_keys(Q) end, [{[3]},{[3,4]}])">>, {warnings,[{{2,61},qlc,nomatch_filter}]}}, <<"etsc(fun(E) -> U = 18, Q = qlc:q([{X,Y} || {X=Y} <- ets:table(E), [X|a] =:= [3|U]]), [] = qlc:e(Q), [3] = lookup_keys(Q) end, [{2}, {3}])">>, <<"etsc(fun(E) -> U = 18, V = 19, Q = qlc:q([{X,Y} || {X=Y} <- ets:table(E), [X|V] =:= [3|U+1]]), [{3,3}] = qlc:e(Q), [3] = lookup_keys(Q) end, [{2},{3}])">>, <<"%% Blocks are not handled. etsc(fun(E) -> Q = qlc:q([X || {X} <- ets:table(E), begin X == a end]), [a] = qlc:e(Q), false = lookup_keys(Q) end, [{a},{b}])">>, {cres, <<"etsc(fun(E) -> Q = qlc:q([X || {X} <- ets:table(E), (3 =:= X) or (X =:= 12), (8 =:= X) or (X =:= 10)]), [] = lists:sort(qlc:e(Q)), false = lookup_keys(Q) end, [{2},{3},{4},{8}])">>, {warnings,[{{4,44},qlc,nomatch_filter}]}}, {cres, <<"etsc(fun(E) -> Q = qlc:q([X || {X} <- ets:table(E), ((3 =:= X) or (X =:= 12)) and ((8 =:= X) or (X =:= 10))]), [] = lists:sort(qlc:e(Q)), false = lookup_keys(Q) end, [{2},{3},{4},{8}])">>, {warnings,[{{4,35},qlc,nomatch_filter}]}}, <<"F = fun(U) -> Q = qlc:q([X || {X} <- [a,b,c], X =:= if U -> true; true -> false end]), [] = qlc:eval(Q), false = lookup_keys(Q) end, F(apa)">>, {cres, <<"etsc(fun(E) -> Q = qlc:q([X || {X=1,X} <- ets:table(E), X =:= 2]), [] = qlc:e(Q), false = lookup_keys(Q) end, [{1,1},{2,1}])">>, {warnings,[{{2,61},qlc,nomatch_filter}]}}, <<"Two = 2.0, etsc(fun(E) -> Q = qlc:q([X || {X} <- ets:table(E), X =:= Two]), [Two] = qlc:e(Q), [Two] = lookup_keys(Q) end, [{2.0},{2}])">>, <<"etsc(fun(E) -> %% This float is equal (==) to an integer. Not a constant! Q = qlc:q([X || {X} <- ets:table(E), X == {a,b,c,[2.0]}]), [_,_] = qlc:e(Q), false = lookup_keys(Q) end, [{{a,b,c,[2]}},{{a,b,c,[2.0]}}])">>, <<"%% Must _not_ regard floats as constants. Check imported variables %% in runtime. etsc(fun(E) -> U = 3.0, QH = qlc:q([X || {X,_} <- ets:table(E), X =:= U]), [] = qlc:e(QH), [U] = lookup_keys(QH) end, [{1,a},{2,b},{3,c},{4,d}])">>, <<"etsc(fun(E) -> Q = qlc:q([X || {X} <- ets:table(E), length(X) =:= 1]), [[1]] = qlc:e(Q), false = lookup_keys(Q) end, [{[1]},{[2,3]}])">>, <<"etsc(fun(E) -> A=3, Q = qlc:q([X || {X,Y} <- ets:table(E), X =:= A, Y =:= 3]), [3] = qlc:e(Q), [3] = lookup_keys(Q) end, [{3,3},{4,3}])">>, <<"etsc(fun(E) -> A = 1, Q = qlc:q([X || {X} <- ets:table(E), X =:= 1, <<X>> =:= <<A>>]), [1] = qlc:e(Q), [1] = lookup_keys(Q) end, [{1},{2}])">>, <<"etsc(fun(E) -> Q = qlc:q([X || {X} <- ets:table(E), X == a]), [a] = qlc:e(Q), [a] = lookup_keys(Q) end, [{a},{b},{c}])">>, {cres, <<"etsc(fun(E) -> Q = qlc:q([X || {X}=Y <- ets:table(E), element(2, Y) == b, X =:= 1]), [] = qlc:e(Q), false = lookup_keys(Q) end, [{1,b},{2,3}])">>, {warnings,[{2,sys_core_fold,nomatch_guard}, {3,qlc,nomatch_filter}, {3,sys_core_fold,{eval_failure,badarg}}]}}, <<"etsc(fun(E) -> Q = qlc:q([X || {X} <- ets:table(E), element(1,{X}) =:= 1]), [1] = qlc:e(Q), [1] = lookup_keys(Q) end, [{1}, {2}])">>, <<"etsc(fun(E) -> Q = qlc:q([X || {X} <- ets:table(E), 1 =:= element(1,{X})]), [1] = qlc:e(Q), [1] = lookup_keys(Q) end, [{1}, {2}])">>, {cres, <<"etsc(fun(E) -> Q = qlc:q([X || {X} <- ets:table(E), X =:= {1}, element(1,X) =:= 2]), [] = qlc:e(Q), false = lookup_keys(Q) end, [{{1}},{{2}}])">>, {warnings,[{{4,47},qlc,nomatch_filter}]}}, {cres, <<"etsc(fun(E) -> Q = qlc:q([X || {X} <- ets:table(E), X =:= {1}, element(1,X) =:= element(1, {2})]), [] = qlc:e(Q), false = lookup_keys(Q) end, [{{1}},{{2}}])">>, {warnings,[{{4,47},qlc,nomatch_filter}]}}, <<"etsc(fun(E) -> Q = qlc:q([X || {X} <- ets:table(E), element(1,X) =:= 1, X =:= {1}]), [{1}] = qlc:e(Q), [{1}] = lookup_keys(Q) end, [{{1}},{{2}}])">>, <<"etsc(fun(E) -> Q = qlc:q([X || {X} <- ets:table(E), {{element(1,element(1,{{1}}))}} =:= {X}]), [{1}] = qlc:e(Q), [{1}] = lookup_keys(Q) end, [{{1}},{{2}}])">>, <<"etsc(fun(E) -> Q = qlc:q([X || X <- ets:table(E), {element(1,element(1, {{1}}))} =:= {element(1,X)}]), [{1}] = qlc:e(Q), [1] = lookup_keys(Q) end, [{1},{2}])">>, <<"etsc(fun(E) -> Q = qlc:q([X || {{X,Y}} <- ets:table(E), (X =:= 1) and (Y =:= 2) or (X =:= 3) and (Y =:= 4)]), [1,3] = lists:sort(qlc:e(Q)), [{1,2}, {3,4}] = lookup_keys(Q) end, [{{1,2}}, {{3,4}}, {{2,3}}])">>, <<"etsc(fun(E) -> Q = qlc:q([X || {{X,a}} <- ets:table(E), X =:= 3]), [3] = qlc:e(Q), [{3,a}] = lookup_keys(Q) end, [{{3,a}},{{3,b}}])">>, <<"etsc(fun(E) -> Q = qlc:q([X || {{X,Y},_Z} <- ets:table(E), X =:= 3, Y =:= a]), [3] = qlc:e(Q), [{3,a}] = lookup_keys(Q) end, [{{3,a},3}, {{4,a},3}])">>, <<"etsc(fun(E) -> Q = qlc:q([X || {{X,Y},_Z} <- ets:table(E), (X =:= 3) and (Y =:= a) or (X =:= 4) and (Y =:= a)]), [3,4] = qlc:e(Q), [{3,a}, {4,a}] = lookup_keys(Q) end, [{{3,a},3}, {{4,a},3}])">>, {cres, <<"etsc(fun(E) -> Q = qlc:q([X || {X} <- ets:table(E), (X =:= 3) and (X =:= a)]), [] = qlc:e(Q), false = lookup_keys(Q) end, [{3}, {4}])">>, {warnings,[{{3,44},qlc,nomatch_filter}]}}, <<"etsc(fun(E) -> Q = qlc:q([X || {{X,Y}} <- ets:table(E), X =:= 3, ((Y =:= a) or (Y =:= b))]), [3,3] = qlc:e(Q), [{3,a},{3,b}] = lists:sort(lookup_keys(Q)) end, [{{3,a}},{{2,b}},{{3,b}}])">>, <<"etsc(fun(E) -> Q = qlc:q([X || {X,Y} <- ets:table(E), ((X =:= 3) or (Y =:= 4)) and (X == a)]), [a] = qlc:e(Q), [a] = lookup_keys(Q) end, [{a,4},{3,3}])">>, <<"etsc(fun(E) -> Q = qlc:q([X || {X,Y} <- ets:table(E), (X =:= 3) or ((Y =:= 4) and (X == a))]), [3,a] = lists:sort(qlc:e(Q)), [3,a] = lookup_keys(Q) end, [{a,4},{3,3}])">>, <<"etsc(fun(E) -> Q = qlc:q([X || {{X,Y}} <- ets:table(E), (X =:= 3) or ((Y =:= 4) and (X == a))]), [3,a] = lists:sort(qlc:e(Q)), false = lookup_keys(Q) end, [{{3,a}},{{2,b}},{{a,4}}])">>, <<"etsc(fun(E) -> Q = qlc:q([X || {{X,Y}} <- ets:table(E), ((X =:= 3) or (Y =:= 4)) and (X == a)]), [a] = lists:sort(qlc:e(Q)), [{a,4}] = lookup_keys(Q) end, [{{3,a}},{{2,b}},{{a,4}}])">>, <<"etsc(fun(E) -> NoAnswers = 3*3*3+2*2*2, Q = qlc:q([{X,Y,Z} || {{X,Y,Z}} <- ets:table(E), (((X =:= 4) or (X =:= 5)) and ((Y =:= 4) or (Y =:= 5)) and ((Z =:= 4) or (Z =:= 5))) or (((X =:= 1) or (X =:= 2) or (X =:= 3)) and ((Y =:= 1) or (Y =:= 2) or (Y =:= 3)) and ((Z =:= 1) or (Z =:= 2) or (Z =:= 3)))], {max_lookup, NoAnswers}), {list, {table, _}, _} = i(Q), [{1,1,1},{2,2,2},{3,3,3}] = lists:sort(qlc:e(Q)), true = NoAnswers =:= length(lookup_keys(Q)) end, [{{1,1,1}},{{2,2,2}},{{3,3,3}},{{3,3,4}},{{4,1,1}}])">>, <<"etsc(fun(E) -> Q = qlc:q([{X,Y,Z} || {{X,Y,Z}} <- ets:table(E), (((X =:= 4) or (X =:= 5)) and ((Y =:= 4) or (Y =:= 5)) and ((Z =:= 4) or (Z =:= 5))) or (((X =:= 1) or (X =:= 2) or (X =:= 3)) and ((Y =:= 1) or (Y =:= 2) or (Y =:= 3)) and ((Z =:= 1) or (Z =:= 2) or (Z =:= 3)))], {max_lookup, 10}), [{1,1,1},{2,2,2},{3,3,3}] = lists:sort(qlc:e(Q)), {table,{ets,table,[_,[{traverse,{select,_}}]]}} = i(Q) end, [{{1,1,1}},{{2,2,2}},{{3,3,3}},{{3,3,4}},{{4,1,1}}])">>, <<"etsc(fun(E) -> Q = qlc:q([X || X={_,_,_} <- ets:table(E), element(1, X) =:= 3, element(2, X) == a]), [{3,a,s}] = qlc:e(Q), [3] = lookup_keys(Q) end, [{1,c,q},{2,b,r},{3,a,s}])">>, <<"etsc(fun(E) -> Q = qlc:q([X || X <- ets:table(E), element(0, X) =:= 3]), [] = qlc:e(Q), false = lookup_keys(Q) end, [{1},{2}])">>, <<"etsc(fun(E) -> F = fun(_) -> 3 end, %% No occurs check; X =:= F(X) is ignored. Q = qlc:q([X || {X} <- ets:table(E), X =:= 3, X =:= F(X)]), {qlc,_,[{generate,_,{list,{table,_},_}},_],[]} = i(Q), [3] = lists:sort(qlc:e(Q)), [3] = lookup_keys(Q) end, [{2},{3},{4}])">>, <<"etsc(fun(E) -> A = a, B = a, Q = qlc:q([X || {{X,Y}} <- ets:table(E), ((X =:= A) and (Y =:= B)) or ((X =:= B) and (Y =:= A))]), [a] = qlc:e(Q), %% keys are usorted, duplicate removed: [{a,a}] = lookup_keys(Q) end, [{{a,a}},{{b,b}}])">>, <<"etsc(fun(E) -> A = a, B = b, Q = qlc:q([X || {{X,Y}} <- ets:table(E), ((X =:= A) and (Y =:= B)) or ((X =:= B) and (Y =:= A))]), [a,b] = lists:sort(qlc:e(Q)), [{a,b},{b,a}] = lookup_keys(Q) end, [{{a,b}},{{b,a}},{{c,a}},{{d,b}}])">>, %% The atom 'fail' is recognized - lookup. <<"etsc(fun(E) -> Q = qlc:q([A || {A} <- ets:table(E), (A =:= 2) orelse fail ]), [2] = lists:sort(qlc:e(Q)), [2] = lookup_keys(Q) end, [{1},{2}])">> ], ?line run(Config, Ts), TsR = [ %% is_record/2,3: <<"etsc(fun(E) -> Q = qlc:q([element(1, X) || X <- ets:table(E), erlang:is_record(X, r, 2)]), [r] = qlc:e(Q), [r] = lookup_keys(Q) end, [{keypos,1}], [#r{}])">>, <<"etsc(fun(E) -> Q = qlc:q([element(1, X) || X <- ets:table(E), is_record(X, r, 2)]), [r] = qlc:e(Q), [r] = lookup_keys(Q) end, [{keypos,1}], [#r{}])">>, {cres, <<"etsc(fun(E) -> Q = qlc:q([element(1, X) || X <- ets:table(E), record(X, r)]), [r] = qlc:e(Q), [r] = lookup_keys(Q) end, [{keypos,1}], [#r{}])">>, {warnings,[{{4,45},erl_lint,{obsolete_guard,{record,2}}}]}}, <<"etsc(fun(E) -> Q = qlc:q([element(1, X) || X <- ets:table(E), erlang:is_record(X, r)]), [r] = qlc:e(Q), [r] = lookup_keys(Q) end, [{keypos,1}], [#r{}])">>, <<"etsc(fun(E) -> Q = qlc:q([element(1, X) || X <- ets:table(E), is_record(X, r)]), [r] = qlc:e(Q), [r] = lookup_keys(Q) end, [{keypos,1}], [#r{}])">> ], ?line run(Config, <<"-record(r, {a}).\n">>, TsR), Ts2 = [ <<"etsc(fun(E) -> Q0 = qlc:q([X || X <- ets:table(E), (element(1, X) =:= 1) or (element(1, X) =:= 2)], {cache,ets}), Q = qlc:q([{X,Y} || X <- [1,2], Y <- Q0]), {qlc,_,[{generate,_,{list,[1,2]}}, {generate,_,{table,_}}], []} = i(Q), [{1,{1}},{1,{2}},{2,{1}},{2,{2}}] = lists:sort(qlc:e(Q)), [1,2] = lookup_keys(Q) end, [{keypos,1}], [{1},{2}])">>, <<"etsc(fun(E) -> Q0 = qlc:q([X || X <- ets:table(E), (element(1, X) =:= 1) or (element(1, X) =:= 2)]), Q = qlc:q([{X,Y} || X <- [1,2], Y <- Q0], {cache,true}), {qlc,_,[{generate,_,{list,[1,2]}}, {generate,_,{table,_}}],[]} = i(Q), [1,2] = lookup_keys(Q) end, [{keypos,1}], [{1},{2}])">>, %% One introduced QLC expression (join, ms), and the cache option. <<"%% Match spec and lookup. The lookup is done twice, which might %% be confusing... etsc(fun(E) -> Q = qlc:q([{X,Y} || X <- [1,2], {Y} <- ets:table(E), (Y =:= 1) or (Y =:= 2)], []), [{1,1},{1,2},{2,1},{2,2}] = qlc:e(Q), {qlc,_,[{generate,_,{list,[1,2]}}, {generate,_,{list,{table,_},_}}],[]} = i(Q), [1,2] = lookup_keys(Q) end, [{keypos,1}], [{1},{2},{3}])">>, <<"%% The same as last example, but with cache. %% No cache needed (always one lookup only). etsc(fun(E) -> Q = qlc:q([{X,Y} || X <- [1,2], {Y} <- ets:table(E), (Y =:= 1) or (Y =:= 2)], [cache]), [{1,1},{1,2},{2,1},{2,2}] = qlc:e(Q), {qlc,_,[{generate,_,{list,[1,2]}}, {generate,_,{list,{table,_},_}}],[]} = i(Q), [1,2] = lookup_keys(Q) end, [{keypos,1}], [{1},{2},{3}])">>, <<"%% And again, this time only lookup, no mach spec. etsc(fun(E) -> Q = qlc:q([{X,Y} || X <- [1,2], Y <- ets:table(E), (element(1, Y) =:= 1) or (element(1, Y) =:= 2)], []), [{1,{1}},{1,{2}},{2,{1}},{2,{2}}] = qlc:e(Q), {qlc,_,[{generate,_,{list,[1,2]}}, {generate,_,{table,_}}],[]} = i(Q), [1,2] = lookup_keys(Q) end, [{keypos,1}], [{1},{2},{3}])">>, <<"%% As last one, but with cache. %% No cache needed (always one lookup only). etsc(fun(E) -> Q = qlc:q([{X,Y} || X <- [1,2], Y <- ets:table(E), (element(1, Y) =:= 1) or (element(1, Y) =:= 2)], [cache]), {qlc,_,[{generate,_,{list,[1,2]}}, {generate,_,{table,_}}],[]} = i(Q), [{1,{1}},{1,{2}},{2,{1}},{2,{2}}] = qlc:e(Q), [1,2] = lookup_keys(Q) end, [{keypos,1}], [{1},{2},{3}])">>, <<"%% Lookup only. No cache. etsc(fun(E) -> Q = qlc:q([{X,Y} || X <- [1,2], {Y=2} <- ets:table(E)], []), {qlc,_,[{generate,_,{list,[1,2]}}, {generate,_,{table,_}}],[]} = i(Q), [{1,2},{2,2}] = qlc:e(Q), [2] = lookup_keys(Q) end, [{keypos,1}], [{1},{2},{3}])">>, <<"%% Lookup only. No cache. etsc(fun(E) -> Q = qlc:q([{X,Y} || X <- [1,2], {Y=2} <- ets:table(E)], [cache]), {qlc,_,[{generate,_,{list,[1,2]}}, {generate,_,{table,_}}],[]} = i(Q), [{1,2},{2,2}] = qlc:e(Q), [2] = lookup_keys(Q) end, [{keypos,1}], [{1},{2},{3}])">>, <<"%% Matchspec only. No cache. etsc(fun(E) -> Q = qlc:q([{X,Y} || X <- [1,2], {Y} <- ets:table(E), Y > 1], []), {qlc,_,[{generate,_,{list,[1,2]}}, {generate,_, {table,{ets,_,[_,[{traverse,_}]]}}}],[]} = i(Q), [{1,2},{1,3},{2,2},{2,3}] = qlc:e(Q), false = lookup_keys(Q) end, [{keypos,1}], [{1},{2},{3}])">>, <<"%% Matchspec only. Cache etsc(fun(E) -> Q = qlc:q([{X,Y} || X <- [1,2], {Y} <- ets:table(E), Y > 1], [cache]), {qlc,_,[{generate,_,{list,[1,2]}}, {generate,_,{qlc,_, [{generate,_,{table,{ets,_,[_,[{traverse,_}]]}}}], [{cache,ets}]}}],[]} = i(Q), [{1,2},{1,3},{2,2},{2,3}] = qlc:e(Q), false = lookup_keys(Q) end, [{keypos,1}], [{1},{2},{3}])">>, <<"%% An empty list. Always unique and cached. Q = qlc:q([X || {X} <- [], X =:= 1, begin X > 0 end], [{cache,true},{unique,true}]), {qlc,_,[{generate,_,{list,[]}},_],[{unique,true}]} = i(Q), _ = qlc:info(Q), [] = qlc:e(Q)">>, <<"%% A list is always cached. Q = qlc:q([{X,Y} || Y <- [1,2], X <- [2,1,2]], [cache]), {qlc,_,[{generate,_,{list,[1,2]}}, {generate,_,{list,[2,1,2]}}],[]} = i(Q), [{2,1},{1,1},{2,1},{2,2},{1,2},{2,2}] = qlc:e(Q)">>, <<"%% But a processed list is never cached. Q = qlc:q([{X,Y} || Y <- [1,2], X <- [2,1,2], X > 1], [cache]), {qlc,_,[{generate,_, {list,[1,2]}}, {generate,_,{qlc,_, [{generate,_,{list,{list,[2,1,2]},_}}], [{cache,ets}]}}],[]} = i(Q), [{2,1},{2,1},{2,2},{2,2}] = qlc:e(Q)">>, <<"%% A bug fixed in R11B-2: coalescing simple_qlc:s works now. Q0 = qlc:q([X || {X} <- [{1},{2},{3}]], {cache, ets}), Q1 = qlc:q([X || X <- Q0], {cache, list}), Q = qlc:q([{Y,X} || Y <- [1,2], X <- Q1, X < 2], {cache, list}), {qlc,_,[{generate,_,{list,_}}, {generate,_,{qlc,_,[{generate,_,{list,{list,_},_}}], [{cache,ets}]}},_],[]} = i(Q), [{1,1},{2,1}] = qlc:e(Q)">>, <<"Q = qlc:q([{X,Y} || Y <- [1,2], X <- [1,2], X > 1], [cache,unique]), {qlc,_,[{generate,_,{list,[1,2]}}, {generate,_,{qlc,_, [{generate,_,{list,{list,[1,2]},_}}], [{cache,ets},{unique,true}]}}], [{unique,true}]} = i(Q), [{2,1},{2,2}] = qlc:e(Q)">>, <<"L = [1,2,3], QH1 = qlc:q([{X} || X <- L, X > 1]), QH2 = qlc:q([{X} || X <- QH1, X > 0], [cache]), [{{2}},{{3}}] = qlc:e(QH2), {list,{list,{list,L},_},_} = i(QH2)">>, <<"L = [1,2,3,1,2,3], QH1 = qlc:q([{X} || X <- L, X > 1]), QH2 = qlc:q([{X} || X <- QH1, X > 0], [cache,unique]), [{{2}},{{3}}] = qlc:e(QH2), {qlc,_,[{generate,_,{list,{list,{list,L},_},_}}], [{unique,true}]} = i(QH2)">> ], ?line run(Config, Ts2), LTs = [ <<"etsc(fun(E) -> Q = qlc:q([X || X <- ets:table(E), element(1, X) =:= 1], {lookup,true}), {table,L} = i(Q), true = is_list(L), [{1,a}] = qlc:e(Q), [1] = lookup_keys(Q) end, [{1,a},{2,b}])">>, <<"%% No lookup, use the match spec for traversal instead. etsc(fun(E) -> Q = qlc:q([X || X <- ets:table(E), element(1, X) =:= 1], {lookup,false}), {table,{ets,table,_}} = i(Q), [{1,a}] = qlc:e(Q), false = lookup_keys(Q) end, [{1,a},{2,b}])">>, <<"%% As last one. {max_lookup,0} has the same effect. etsc(fun(E) -> Q = qlc:q([X || X <- ets:table(E), element(1, X) =:= 1], {max_lookup,0}), {table,{ets,table,_}} = i(Q), [{1,a}] = qlc:e(Q), false = lookup_keys(Q) end, [{1,a},{2,b}])">> ], ?line run(Config, LTs), ok. lookup_rec(doc) -> "Lookup keys. With records."; lookup_rec(suite) -> []; lookup_rec(Config) when is_list(Config) -> Ts = [ <<"etsc(fun(E) -> Q = qlc:q([A || #r{a = A} <- ets:table(E), (A =:= 3) or (4 =:= A)]), [3] = qlc:e(Q), [3,4] = lookup_keys(Q) end, [{keypos,2}], [#r{a = a}, #r{a = 3}, #r{a = 5}])">>, {cres, <<"etsc(fun(E) -> Q = qlc:q([A || #r{a = 17 = A} <- ets:table(E), (A =:= 3) or (4 =:= A)]), [] = qlc:e(Q), false = lookup_keys(Q) end, [{keypos,2}], [#r{a = 17}, #r{a = 3}, #r{a = 5}])">>, {warnings,[{{4,44},qlc,nomatch_filter}]}}, <<"%% Compares an integer and a float. etsc(fun(E) -> Q = qlc:q([A || #r{a = 17 = A} <- ets:table(E), (A == 17) or (17.0 == A)]), [_] = qlc:e(Q), [_] = lookup_keys(Q) end, [{keypos,2}], [#r{a = 17}, #r{a = 3}, #r{a = 5}])">>, <<"%% Compares an integer and a float. %% There is a test in qlc_pt.erl (Op =:= '=:=', C1 =:= C2), but %% that case is handled in an earlier clause (unify ... E, E). etsc(fun(E) -> Q = qlc:q([A || #r{a = 17.0 = A} <- ets:table(E), (A =:= 17) or (17.0 =:= A)]), [_] = qlc:e(Q), [_] = lookup_keys(Q) end, [{keypos,2}], [#r{a = 17.0}, #r{a = 3}, #r{a = 5}])">>, <<"%% Matches an integer and a float. etsc(fun(E) -> Q = qlc:q([A || #r{a = 17 = A} <- ets:table(E), (A =:= 17) or (17.0 =:= A)]), [_] = qlc:e(Q), [_] = lookup_keys(Q) end, [{keypos,2}], [#r{a = 17}, #r{a = 3}, #r{a = 5}])">>, <<"etsc(fun(E) -> F = fun(_) -> 17 end, Q = qlc:q([A || #r{a = A} <- ets:table(E), (F(A) =:= 3) and (A =:= 4)]), [] = qlc:e(Q), false = lookup_keys(Q) % F(A) could fail end, [{keypos,2}], [#r{a = 4}, #r{a = 3}, #r{a = 5}])">>, <<"etsc(fun(E) -> Q = qlc:q([X || {X} <- ets:table(E), #r{} == X]), [#r{}] = lists:sort(qlc:e(Q)), {call,_,_,[_,_]} = i(Q, {format, abstract_code}), [#r{}] = lookup_keys(Q) end, [{#r{}},{#r{a=foo}}])">>, <<"etsc(fun(E) -> Q = qlc:q([R#r.a || R <- ets:table(E), R#r.a =:= foo]), [foo] = qlc:e(Q), [_] = lookup_keys(Q) end, [{keypos,2}], [#r{a=foo}])">> ], ?line run(Config, <<"-record(r, {a}).\n">>, Ts), ok. indices(doc) -> "Using indices for lookup."; indices(suite) -> []; indices(Config) when is_list(Config) -> Ts = [ <<"L = [{1,a},{2,b},{3,c}], QH = qlc:q([element(1, X) || X <- qlc_SUITE:table(L, [2]), (element(2, X) =:= a) or (b =:= element(2, X))]), {list, {table,{qlc_SUITE,list_keys,[[a,b],2,L]}}, _MS} = i(QH), [1,2] = qlc:eval(QH)">>, <<"L = [{1,a},{2,b},{3,c}], QH = qlc:q([element(1, X) || X <- qlc_SUITE:table(L, [2]), begin (element(2, X) =:= a) or (b =:= element(2, X)) end]), {qlc,_,[{generate,_,{table,{call,_, {remote,_,_,{atom,_,the_list}},_}}},_],[]} = i(QH), [1,2] = qlc:eval(QH)">>, <<"L = [{1,a,q},{2,b,r},{3,c,s}], QH = qlc:q([element(1, X) || X <- qlc_SUITE:table(L, [2,3]), (element(3, X) =:= q) or (r =:= element(3, X))]), {list, {table,{qlc_SUITE,list_keys, [[q,r],3,L]}}, _MS} = i(QH), [1,2] = qlc:eval(QH)">>, <<"L = [{1,a,q},{2,b,r},{3,c,s}], QH = qlc:q([element(1, X) || X <- qlc_SUITE:table(L, 1, [2]), (element(3, X) =:= q) or (r =:= element(3, X))]), {qlc,_,[{generate,_,{table,{call,_,_,_}}}, _],[]} = i(QH), [1,2] = qlc:eval(QH)">>, <<"L = [{a,1},{b,2},{c,3}], QH = qlc:q([E || {K,I}=E <- qlc_SUITE:table(L, 1, [2]), ((K =:= a) or (K =:= b) or (K =:= c)) and ((I =:= 1) or (I =:= 2))], {max_lookup, 3}), {list, {table,{qlc_SUITE,list_keys,[[a,b,c],1,L]}}, _MS} = i(QH), [{a,1},{b,2}] = qlc:eval(QH)">>, <<"L = [{a,1},{b,2},{c,3}], QH = qlc:q([E || {K,I}=E <- qlc_SUITE:table(L, 1, [2]), ((K =:= a) or (K =:= b) or (K =:= c)) and ((I =:= 1) or (I =:= 2))], {max_lookup, 2}), {list, {table,{qlc_SUITE,list_keys, [[1,2],2,L]}}, _MS} = i(QH), [{a,1},{b,2}] = qlc:eval(QH)">>, <<"L = [{a,1,x,u},{b,2,y,v},{c,3,z,w}], QH = qlc:q([E || {K,I1,I2,I3}=E <- qlc_SUITE:table(L, 1, [2,3,4]), ((K =/= a) or (K =/= b) or (K =/= c)) and ((I1 =:= 1) or (I1 =:= 2) or (I1 =:= 3) or (I1 =:= 4)) and ((I2 =:= x) or (I2 =:= z)) and ((I3 =:= v) or (I3 =:= w))], {max_lookup, 5}), {list, {table,{qlc_SUITE,list_keys, [[x,z],3,L]}}, _MS} = i(QH), [{c,3,z,w}] = qlc:eval(QH)">> ], ?line run(Config, <<"-record(r, {a}).\n">>, Ts), ok. pre_fun(doc) -> "Test the table/2 callback functions parent_fun and stop_fun."; pre_fun(suite) -> []; pre_fun(Config) when is_list(Config) -> Ts = [ <<"PF = process_flag(trap_exit, true), %% cursor: table killing parent L = [{1,a},{2,b},{3,c}], F1 = fun() -> QH = qlc:q([element(1, X) || X <- qlc_SUITE:table_kill_parent(L, [2]), (element(2, X) =:= a) or (b =:= element(2, X))]), _ = qlc:info(QH), _ = qlc:cursor(QH) end, Pid1 = spawn_link(F1), receive {'EXIT', Pid1, killed} -> ok end, timer:sleep(1), process_flag(trap_exit, PF)">>, <<"PF = process_flag(trap_exit, true), %% eval without cursor: table killing parent L = [{1,a},{2,b},{3,c}], F2 = fun() -> QH = qlc:q([element(1, X) || X <- qlc_SUITE:table_kill_parent(L, [2]), (element(2, X) =:= a) or (b =:= element(2, X))]), _ = qlc:eval(QH) end, Pid2 = spawn_link(F2), receive {'EXIT', Pid2, killed} -> ok end, process_flag(trap_exit, PF)">>, <<"L = [{1,a},{2,b},{3,c}], QH = qlc:q([element(1, X) || X <- qlc_SUITE:table_parent_throws(L, [2]), (element(2, X) =:= a) or (b =:= element(2, X))]), _ = qlc:info(QH), {throw,thrown} = (catch {any_term,qlc:cursor(QH)}), {throw,thrown} = (catch {any_term,qlc:eval(QH)})">>, <<"L = [{1,a},{2,b},{3,c}], QH = qlc:q([element(1, X) || X <- qlc_SUITE:table_parent_exits(L, [2]), (element(2, X) =:= a) or (b =:= element(2, X))]), _ = qlc:info(QH), {'EXIT', {badarith,_}} = (catch qlc:cursor(QH)), {'EXIT', {badarith,_}} = (catch qlc:eval(QH))">>, <<"L = [{1,a},{2,b},{3,c}], QH = qlc:q([element(1, X) || X <- qlc_SUITE:table_bad_parent_fun(L, [2]), (element(2, X) =:= a) or (b =:= element(2, X))]), {'EXIT', {badarg,_}} = (catch qlc:cursor(QH)), {'EXIT', {badarg,_}} = (catch qlc:eval(QH))">>, <<"%% Very simple test of stop_fun. Ets = ets:new(apa, [public]), L = [{1,a},{2,b},{3,c}], H = qlc:q([X || {X,_} <- qlc_SUITE:stop_list(L, Ets)]), C = qlc:cursor(H), [{stop_fun,StopFun}] = ets:lookup(Ets, stop_fun), StopFun(), {'EXIT', {{qlc_cursor_pid_no_longer_exists, _}, _}} = (catch qlc:next_answers(C, all_remaining)), ets:delete(Ets)">> ], ?line run(Config, Ts), ok. skip_filters(doc) -> "Lookup keys. With records."; skip_filters(suite) -> []; skip_filters(Config) when is_list(Config) -> %% Skipped filters TsS = [ %% Cannot skip the filter. <<"etsc(fun(E) -> H = qlc:q([X || X <- ets:table(E), (element(1, X) =:= 1) xor (element(1, X) =:= 1)]), [] = qlc:eval(H), [1] = lookup_keys(H) end, [{keypos,1}], [{1},{2}])">>, %% The filter can be skipped. Just a lookup remains. <<"etsc(fun(E) -> H = qlc:q([X || X <- ets:table(E), (element(1, X) =:= 1) or (element(1, X) =:= 1)]), [{1}] = qlc:eval(H), {table, _} = i(H), [1] = lookup_keys(H) end, [{keypos,1}], [{1},{2}])">>, %% safe_unify fails on 3 and <<X:32>> <<"etsc(fun(E) -> H = qlc:q([X || X <- ets:table(E), (element(1, X) =:= 1) and (3 =:= <<X:32>>)]), [] = qlc:eval(H), [1] = lookup_keys(H) end, [{keypos,1}], [{1},{2}])">>, %% Two filters are skipped. <<"etsc(fun(E) -> Q = qlc:q([{B,C,D} || {A={C},B} <- ets:table(E), (A =:= {1}) or (A =:= {2}), (C =:= 1) or (C =:= 2), D <- [1,2]]), {qlc,_,[{generate,_,{table,_}},{generate,_,{list,[1,2]}}],[]} = i(Q), [{1,1,1},{1,1,2},{2,2,1},{2,2,2}] = lists:sort(qlc:eval(Q)), [{1},{2}] = lookup_keys(Q) end, [{{1},1},{{2},2},{{3},3}])">>, <<"etsc(fun(E) -> Q = qlc:q([{B,C} || {A={C},B} <- ets:table(E), (A =:= {1}) or (A =:= {2}), (C =:= 1) or (C =:= 2)]), {qlc,_,[{generate,_,{table,_}}],[]} = i(Q), [{1,1},{2,2}] = lists:sort(qlc:eval(Q)), [{1},{2}] = lookup_keys(Q) end, [{{1},1},{{2},2},{{3},3}])">>, %% Lookup. No match spec, no filter. <<"etsc(fun(E) -> Q = qlc:q([X || X <- ets:table(E), element(1, X) =:= 1]), {table, _} = i(Q), [{1}] = qlc:e(Q), [1] = lookup_keys(Q) end, [{1},{2}])">>, <<"etsc(fun(E) -> Q = qlc:q([{X,Y} || X <- ets:table(E), element(1, X) =:= 1, Y <- [1,2]]), {qlc,_,[{generate,_,{table,_}},{generate,_,{list,_}}],[]} = i(Q), [{{1},1},{{1},2}] = lists:sort(qlc:e(Q)), [1] = lookup_keys(Q) end, [{1},{2}])">>, <<"etsc(fun(E) -> Q = qlc:q([X || {X,Y} <- ets:table(E), X =:= a, X =:= Y]), {list,{table,_},_} = i(Q), [a] = qlc:e(Q), [a] = lookup_keys(Q) end, [{a,a},{b,c},{c,a}])">>, %% The imported variable (A) is never looked up in the current %% implementation. This means that the first filter cannot be skipped; %% the constant 'a' is looked up, and then the first filter evaluates %% to false. <<"etsc(fun(E) -> A = 3, Q = qlc:q([X || X <- ets:table(E), A == element(1,X), element(1,X) =:= a]), [] = qlc:e(Q), [a] = lookup_keys(Q) end, [{a},{b},{c}])">>, %% No lookup. {cres, <<"etsc(fun(E) -> Q = qlc:q([X || {X} <- ets:table(E), X =:= 1, X =:= 2]), {table, _} = i(Q), [] = qlc:e(Q), false = lookup_keys(Q) end, [{1,1},{2,0}])">>, {warnings,[{{4,37},qlc,nomatch_filter}]}}, <<"etsc(fun(E) -> Q = qlc:q([{A,B,C} || {A} <- ets:table(E), A =:= 1, {B} <- ets:table(E), B =:= 2, {C} <- ets:table(E), C =:= 3]), {qlc,_,[{generate,_,{list,{table,_},_}}, {generate,_,{list,{table,_},_}}, {generate,_,{list,{table,_},_}}],[]} = i(Q), [{1,2,3}] = qlc:e(Q), [1,2,3] = lookup_keys(Q) end, [{0},{1},{2},{3},{4}])">> ], ?line run(Config, TsS), Ts = [ <<"etsc(fun(E) -> H = qlc:q([X || {X,_} <- ets:table(E), X =:= 2]), {list,{table,_},_} = i(H), [2] = qlc:e(H) end, [{1,a},{2,b}])">>, <<"etsc(fun(E) -> H = qlc:q([X || {X,_} <- ets:table(E), ((X =:= 2) or (X =:= 1)) and (X > 1)]), {list,{table,_},_} = i(H), [2] = qlc:e(H) end, [{1,a},{2,b}])">>, <<"etsc(fun(E) -> H = qlc:q([X || {X,Y} <- ets:table(E), (X =:= 2) and (Y =:= b)]), {list,{table,_},_} = i(H), [2] = qlc:e(H) end, [{1,a},{2,b}])">>, <<"etsc(fun(E) -> H = qlc:q([X || X <- ets:table(E), (element(1,X) =:= 2) and (X =:= {2,b})]), {list,{table,_},_} = i(H), [{2,b}] = qlc:e(H) end, [{1,a},{2,b}])">>, <<"etsc(fun(E) -> H = qlc:q([{X,Y,Z,W} || {X,Y} <- ets:table(E), {Z,W} <- ets:table(E), (Y =:= 3) or (Y =:= 4)]), {qlc,_,[{generate,_,{table,{ets,table,_}}}, {generate,_,{table,{ets,table,_}}}],[]} = i(H), [{a,3,a,3},{a,3,b,5}] = lists:sort(qlc:e(H)) end, [{a,3},{b,5}])">>, <<"etsc(fun(E) -> H = qlc:q([{X,Y} || {X,Y=3} <- ets:table(E), % no matchspec %% Two columns restricted, but lookup anyway (X =:= a)]), {qlc,_,[{generate,_,{table,_}}],[]} = i(H), [{a,3}] = qlc:e(H) end, [{a,3},{b,4}])">>, <<"etsc(fun(E) -> V = 3, H = qlc:q([{X,Y} || {X,Y} <- ets:table(E), (Y =:= V)]), % imported variable, no lookup {table,{ets,table,_}} = i(H), [{a,3}] = qlc:e(H) end, [{a,3},{b,4}])">>, <<"etsc(fun(E) -> V = b, H = qlc:q([{X,Y} || {X,Y} <- ets:table(E), (X =:= V)]), % imported variable, lookup {list,{table,_},_} = i(H), [{b,4}] = qlc:e(H) end, [{a,3},{b,4}])">>, <<"H = qlc:q([{A,B} || {{A,B}} <- [{{1,a}},{{2,b}}], A =:= 1, B =:= a]), {list,{list,[_,_]},_} = i(H), [{1,a}] = qlc:e(H)">>, <<"etsc(fun(E) -> H = qlc:q([{A,B} || {{A,B}} <- ets:table(E), A =:= 1, B =:= a]), {list,{table,_},_} = i(H), [{1,a}] = qlc:e(H) end, [{{1,a}},{{2,b}}])">>, %% The filters are skipped, and the guards of the match specifications %% are skipped as well. Only the transformations of the matchspecs %% are kept. <<"etsc(fun(E1) -> etsc(fun(E2) -> H = qlc:q([{X,Y,Z,W} || {X,_}=Z <- ets:table(E1), W={Y} <- ets:table(E2), (X =:= 1) or (X =:= 2), (Y =:= a) or (Y =:= b)] ,{lookup,true} ), {qlc,_,[{generate,_,{list,{table,_}, [{{'$1','_'},[],['$_']}]}}, {generate,_,{list,{table,_}, [{{'$1'},[],['$_']}]}}],[]} = i(H), [{1,a,{1,a},{a}}, {1,b,{1,a},{b}}, {2,a,{2,b},{a}}, {2,b,{2,b},{b}}] = qlc:e(H) end, [{a},{b}]) end, [{1,a},{2,b}])">>, %% The same example again, but this time no match specs are run. <<"fun(Z) -> etsc(fun(E1) -> etsc(fun(E2) -> H = qlc:q([{X,Y} || Z > 2, X <- ets:table(E1), Y <- ets:table(E2), (element(1, X) =:= 1) or (element(1, X) =:= 2), (element(1, Y) =:= a) or (element(1, Y) =:= b)] ,{lookup,true} ), {qlc,_,[_,{generate,_,{table,_}}, {generate,_,{table,_}}],[]} = i(H), [{{1,a},{a}}, {{1,a},{b}}, {{2,b},{a}}, {{2,b},{b}}] = qlc:e(H) end, [{a},{b}]) end, [{1,a},{2,b}]) end(4)">>, %% Once again, this time with a join. <<"etsc(fun(E1) -> etsc(fun(E2) -> H = qlc:q([{X,Y,Z,W} || {X,V}=Z <- ets:table(E1), W={Y} <- ets:table(E2), (X =:= 1) or (X =:= 2), (Y =:= a) or (Y =:= b), Y =:= V] ,[{lookup,true},{join,merge}] ), {qlc,_,[{generate,_,{qlc,_, [{generate,_,{qlc,_,[{generate,_, {keysort,{list,{table,_},_},2,[]}}, _C1,_C2],[]}}, {generate,_, {qlc,_,[{generate, _, {keysort,{list,{table,_},_},1,[]}}, _C3], []}}, _], [{join,merge}]}},_],[]} = i(H), [{1,a,{1,a},{a}},{2,b,{2,b},{b}}] = lists:sort(qlc:e(H)) end, [{a},{b}]) end, [{1,a},{2,b}])">>, %% Filters 2 and 3 are not skipped. %% (Only one filter at a time is tried by the parse transform.) <<"etsc(fun(E) -> H = qlc:q([X || {{A,B}=X,Y} <- ets:table(E), % no matchspec Y =:= 3, A =:= 1, B =:= a]), {qlc,_,[{generate,_,{table,_}},_,_,_],[]}= i(H), [{1,a}] = qlc:e(H) end, [{{1,a},3},{{2,b},4}])">>, <<"etsc(fun(E) -> H = qlc:q([X || {X=_,_} <- ets:table(E), % no matchspec (X =:= 3) and (X > 3)]), {qlc,_,[{generate,_,{table,_}},_],[]} = i(H), [] = qlc:e(H) end, [{3,a},{4,b}])">>, <<"etsc(fun(E) -> H = qlc:q([X || {X=_,_} <- ets:table(E), % no matchspec (X =:= 3) or true]), {qlc,_,[{generate,_,{table,{ets,table,_}}},_],[]} = i(H), [3,4] = lists:sort(qlc:e(H)) end, [{3,a},{4,b}])">>, <<"etsc(fun(E) -> H = qlc:q([X || {X=_,_} <- ets:table(E), % no matchspec (X =:= 3) or false]), {qlc,_,[{generate,_,{table,_}}],[]} = i(H), [3] = lists:sort(qlc:e(H)) end, [{3,a},{4,b}])">>, <<"etsc(fun(E) -> H = qlc:q([X || {X=_,_} <- ets:table(E), % no matchspec (X =:= X) and (X =:= 3)]), {qlc,_,[{generate,_,{table,_}}],[]} = i(H), [3] = lists:sort(qlc:e(H)) end, [{3,a},{4,b}])">>, %% The order of filters matters. A guard filter cannot be used %% unless there are no non-guard filter placed before the guard %% filter that uses the guard filter's generator. There is %% more examples in join_filter(). <<"etsc(fun(E) -> %% Lookup. Q = qlc:q([{A,B,A} || {A=_,B} <- ets:table(E), % no match spec A =:= 1, begin 1/B > 0 end]), [{1,1,1}] = lists:sort(qlc:e(Q)) end, [{1,1},{2,0}])">>, <<"etsc(fun(E) -> %% No lookup. Q = qlc:q([{A,B,A} || {A=_,B} <- ets:table(E), % no match spec begin 1/B > 0 end, A =:= 1]), {'EXIT', _} = (catch qlc:e(Q)) end, [{1,1},{2,0}])">>, %% The same thing, with a match specification. <<"etsc(fun(E) -> Q = qlc:q([{A,B,A} || {A,B} <- ets:table(E), % match spec A < 2, begin 1/B > 0 end]), [{1,1,1}] = lists:sort(qlc:e(Q)) end, [{1,1},{2,0}])">>, <<"etsc(fun(E) -> Q = qlc:q([{A,B,A} || {A,B} <- ets:table(E), % match spec begin 1/B > 0 end, A < 2]), {'EXIT', _} = (catch qlc:e(Q)) end, [{1,1},{2,0}])">>, %% More examples, this time two tables. <<"etsc(fun(E) -> Q = qlc:q([{A,B,C,D} || {A,B} <- ets:table(E), % match spec A < 2, {C,D} <- ets:table(E), begin 1/B > 0 end, %\"invalidates\" next filter C =:= 1, begin 1/D > 0 end]), {qlc,_,[{generate,_,{table,{ets,table,_}}}, {generate,_,{table,{ets,table,_}}}, _,_,_],[]} = i(Q), [{1,1,1,1}] = lists:sort(qlc:e(Q)) end, [{1,1},{2,0}])">>, <<"etsc(fun(E) -> Q = qlc:q([{A,B,C,D} || {A,B} <- ets:table(E), {C,D} <- ets:table(E), begin 1/B > 0 end, % \"invalidates\" two filters A < 2, C =:= 1, begin 1/D > 0 end]), {qlc,_,[{generate,_,{table,{ets,table,_}}}, {generate,_,{table,{ets,table,_}}},_,_,_,_],[]} = i(Q), {'EXIT', _} = (catch qlc:e(Q)) end, [{1,1},{2,0}])">>, <<"%% There are objects in the ETS table, but none passes the filter. %% F() would not be run if it did not \"invalidate\" the following %% guards. etsc(fun(E) -> F = fun() -> [foo || A <- [0], 1/A] end, Q1 = qlc:q([X || {X} <- ets:table(E), F(), % \"invalidates\" next guard X =:= 17]), {'EXIT', _} = (catch qlc:e(Q1)) end, [{1},{2},{3}])">>, <<"%% The last example works just like this one: etsc(fun(E) -> F = fun() -> [foo || A <- [0], 1/A] end, Q1 = qlc:q([X || {X} <- ets:table(E), F(), begin X =:= 17 end]), {'EXIT', _} = (catch qlc:e(Q1)) end, [{1},{2},{3}])">> ], ?line run(Config, Ts), ok. ets(doc) -> "ets:table/1,2."; ets(suite) -> []; ets(Config) when is_list(Config) -> Ts = [ <<"E = ets:new(t, [ordered_set]), true = ets:insert(E, [{1},{2}]), {'EXIT', _} = (catch qlc:e(qlc:q([X || {X} <- ets:table(E, bad_option)]))), {'EXIT', _} = (catch qlc:e(qlc:q([X || {X} <- ets:table(E,{traverse,bad})]))), All = [{'$1',[],['$1']}], TravAll = {traverse,{select,All}}, [_, _] = qlc:e(qlc:q([X || {X} <- ets:table(E, TravAll)])), [_, _] = qlc:e(qlc:q([X || {X} <- ets:table(E,{traverse,select})])), [1,2] = qlc:e(qlc:q([X || {X} <- ets:table(E, {traverse, first_next})])), [2,1] = qlc:e(qlc:q([X || {X} <- ets:table(E, {traverse, last_prev})])), {table,{ets,table,[_,[{traverse,{select,_}},{n_objects,1}]]}} = i(qlc:q([X || {X} <- ets:table(E, {n_objects,1})])), {qlc,_,[{generate,_,{table,{ets,table,[_,{n_objects,1}]}}},_],[]} = i(qlc:q([X || {X} <- ets:table(E,{n_objects,1}), begin (X >= 1) or (X < 1) end])), {qlc,_,[{generate,_,{table,{ets,table,[_]}}},_],[]} = i(qlc:q([X || {X} <- ets:table(E), begin (X >= 1) or (X < 1) end])), ets:delete(E)">>, begin MS = ets:fun2ms(fun({X,Y}) when X > 1 -> {X,Y} end), [<<"E = ets:new(apa,[]), true = ets:insert(E, [{1,a},{2,b},{3,c}]), MS = ">>, io_lib:format("~w", [MS]), <<", Q = qlc:q([X || {X,_} <- ets:table(E, {traverse, {select, MS}}), X =:= 1]), R = qlc:e(Q), ets:delete(E), [] = R">>] end ], ?line run(Config, Ts), ok. dets(doc) -> "dets:table/1,2."; dets(suite) -> []; dets(Config) when is_list(Config) -> dets:start(), T = t, Fname = filename(T, Config), Ts = [ [<<"T = t, Fname = \"">>, Fname, <<"\", file:delete(Fname), {ok, _} = dets:open_file(T, [{file,Fname}]), ok = dets:insert(T, [{1},{2}]), {'EXIT', _} = (catch qlc:e(qlc:q([X || {X} <- dets:table(T, bad_option)]))), {'EXIT', _} = (catch qlc:e(qlc:q([X || {X} <- dets:table(T,{traverse,bad})]))), {'EXIT', _} = (catch qlc:e(qlc:q([X || {X} <- dets:table(T,{traverse,last_prev})]))), All = [{'$1',[],['$1']}], TravAll = {traverse,{select,All}}, [_,_] = qlc:e(qlc:q([X || {X} <- dets:table(T, TravAll)])), [_,_] = qlc:e(qlc:q([X || {X} <- dets:table(T,{traverse,select})])), [_,_] = qlc:e(qlc:q([X || {X} <- dets:table(T, {traverse, first_next})])), {table,{dets,table,[T,[{traverse,{select,_}},{n_objects,1}]]}} = i(qlc:q([X || {X} <- dets:table(T, {n_objects,1})])), {qlc,_,[{generate,_,{table,{dets,table,[t,{n_objects,1}]}}},_],[]}= i(qlc:q([X || {X} <- dets:table(T,{n_objects,1}), begin (X >= 1) or (X < 1) end])), {qlc,_,[{generate,_,{table,{dets,table,[_]}}},_],[]} = i(qlc:q([X || {X} <- dets:table(T), begin (X >= 1) or (X < 1) end])), H = qlc:q([X || {X} <- dets:table(T, {n_objects, default}), begin (X =:= 1) or (X =:= 2) or (X =:= 3) end]), [1,2] = lists:sort(qlc:e(H)), {qlc,_,[{generate,_,{table,_}},_],[]} = i(H), H2 = qlc:q([X || {X} <- dets:table(T), (X =:= 1) or (X =:= 2)]), [1,2] = lists:sort(qlc:e(H2)), {list,{table,_},_} = i(H2), true = binary_to_list(<< \"ets:match_spec_run(lists:flatmap(fun(V)->dets:lookup(t,V)end,\" \"[1,2]),ets:match_spec_compile([{{'$1'},[],['$1']}]))\">>) == format_info(H2, true), H3 = qlc:q([X || {X} <- dets:table(T), (X =:= 1)]), [1] = qlc:e(H3), {list,{table,_},_} = i(H3), ok = dets:close(T), file:delete(\"">>, Fname, <<"\"), ok">>], begin MS = ets:fun2ms(fun({X,Y}) when X > 1 -> {X,Y} end), [<<"T = t, Fname = \"">>, Fname, <<"\", {ok, _} = dets:open_file(T, [{file,Fname}]), MS = ">>, io_lib:format("~w", [MS]), <<", ok = dets:insert(T, [{1,a},{2,b},{3,c}]), Q = qlc:q([X || {X,_} <- dets:table(T, {traverse, {select, MS}}), X =:= 1]), R = qlc:e(Q), ok = dets:close(T), file:delete(\"">>, Fname, <<"\"), [] = R">>] end, [<<"T = t, Fname = \"">>, Fname, <<"\", {ok, _} = dets:open_file(T, [{file,Fname}]), Objs = [{X} || X <- lists:seq(1,10)], ok = dets:insert(T, Objs), {ok, Where} = dets:where(T, {2}), ok = dets:close(T), qlc_SUITE:crash(Fname, Where), {ok, _} = dets:open_file(T, [{file,Fname}]), HT = qlc:q([X || {X} <- dets:table(T, {traverse, first_next})]), {'EXIT',{error,{{bad_object,_},_}}} = (catch qlc:e(HT)), _ = dets:close(T), {ok, _} = dets:open_file(T, [{file,Fname}]), HMS = qlc:q([X || {X} <- dets:table(T, {traverse, select})]), {error,{{bad_object,_},_}} = qlc:e(HMS), _ = dets:close(T), {ok, _} = dets:open_file(T, [{file,Fname}]), HLU = qlc:q([X || {X} <- dets:table(T), X =:= 2]), {error,{{bad_object,_},_}} = qlc:e(HLU), _ = dets:close(T), file:delete(Fname)">>] ], ?line run(Config, Ts), _ = file:delete(Fname), ok. join_option(doc) -> "The 'join' option (any, lookup, merge, nested_loop). Also cache/unique."; join_option(suite) -> []; join_option(Config) when is_list(Config) -> Ts = [ <<"Q1 = qlc:q([X || X <- [1,2,3]],{join,merge}), {'EXIT', {no_join_to_carry_out,_}} = (catch {foo, qlc:info(Q1)}), {'EXIT', {no_join_to_carry_out,_}} = (catch {foo, qlc:e(Q1)}), Q2 = qlc:q([X || X <- [1,2,3], X > 1],{join,merge}), {'EXIT', {no_join_to_carry_out,_}} = (catch {foo, qlc:info(Q2)}), {'EXIT', {no_join_to_carry_out,_}} = (catch {foo, qlc:e(Q2)}), Q3 = qlc:q([{X,Y} || {X} <- [{1},{2},{3}], {Y} <- [{a},{b},{c}], X =:= Y], {join, merge}), {1,0,0,2} = join_info(Q3), [] = qlc:e(Q3), Q4 = qlc:q([{X,Y} || {X} <- [{1},{2},{3}], {Y} <- [{a},{b},{c}], X > Y], {join, lookup}), {'EXIT', {no_join_to_carry_out, _}} = (catch {foo, qlc:info(Q4)}), {'EXIT', {no_join_to_carry_out, _}} = (catch {foo, qlc:e(Q4)}), Q5 = qlc:q([{X,Y} || {X} <- [{1},{2},{3}], {Y} <- [{3},{4},{5}], X == Y], {join, merge}), [{3,3}] = qlc:e(Q5), Q6 = qlc:q([{X,Y} || {X} <- [{1},{2},{3}], {Y} <- [{3},{4},{5}], X == Y], {join, lookup}), {'EXIT', {cannot_carry_out_join, _}} = (catch {foo, qlc:info(Q6)}), {'EXIT', {cannot_carry_out_join, _}} = (catch {foo, qlc:e(Q6)}), Q7 = qlc:q([{X,Y} || {X} <- [{1},{2},{3}], {Y} <- [{3},{4},{5}], X == Y], {join, nested_loop}), {0,0,1,0} = join_info(Q7), [{3,3}] = qlc:e(Q7), Q8 = qlc:q([{X,Y} || {X} <- [{1},{2},{3}], {Y} <- [{3},{4},{5}], X =:= Y], {join, nested_loop}), {0,0,1,0} = join_info(Q8), [{3,3}] = qlc:e(Q8), %% Only guards are inspected... Q9 = qlc:q([{X,Y} || {X} <- [{1},{2},{3}], {Y} <- [{3},{4},{5}], begin X =:= Y end], {join, nested_loop}), {'EXIT', {no_join_to_carry_out, _}} = (catch {foo, qlc:info(Q9)}), {'EXIT', {no_join_to_carry_out, _}} = (catch {foo, qlc:e(Q9)}), Q10 = qlc:q([{X,Y} || {X} <- [{1},{2},{3}], {Y} <- [{3},{4},{5}], X < Y], {join, nested_loop}), {'EXIT', {no_join_to_carry_out, _}} = (catch {foo, qlc:info(Q10)}), {'EXIT', {no_join_to_carry_out, _}} = (catch {foo, qlc:e(Q10)}), F = fun(J) -> qlc:q([X || X <- [1,2]], {join,J}) end, {'EXIT', {no_join_to_carry_out, _}} = (catch {foo, qlc:e(F(merge))}), {'EXIT', {no_join_to_carry_out, _}} = (catch {foo, qlc:e(F(lookup))}), {'EXIT', {no_join_to_carry_out, _}} = (catch {foo, qlc:e(F(nested_loop))}), [1,2] = qlc:e(F(any)), %% No join of columns in the same table. Q11 = qlc:q([{X,Y} || {a = X, X = Y} <- [{a,1},{a,a},{a,3},{a,a}]], {join,merge}), {'EXIT', {no_join_to_carry_out, _}} = (catch qlc:e(Q11)), Q12 = qlc:q([{X,Y} || {X = a, X = Y} <- [{a,1},{a,a},{a,3},{a,a}]], {join,merge}), {'EXIT', {no_join_to_carry_out, _}} = (catch qlc:e(Q12)), %% X and Y are \"equal\" (same constants), but must not be joined. Q13 = qlc:q([{X,Y} || {X,_Z} <- [{a,1},{a,2},{b,1},{b,2}], {Y} <- [{a}], (X =:= a) and (Y =:= b) or (X =:= b) and (Y =:= a)], {join,merge}), {'EXIT', {no_join_to_carry_out, _}} = (catch qlc:e(Q13)) ">>, <<"Q1 = qlc:q([X || X <- [1,2,3]], {lookup,true}), {'EXIT', {no_lookup_to_carry_out, _}} = (catch {foo, qlc:info(Q1)}), {'EXIT', {no_lookup_to_carry_out, _}} = (catch {foo, qlc:e(Q1)}), Q2 = qlc:q([{X,Y} || X <- [1,2,3], Y <- [x,y,z]], lookup), {'EXIT', {no_lookup_to_carry_out, _}} = (catch {foo, qlc:info(Q2)}), {'EXIT', {no_lookup_to_carry_out, _}} = (catch {foo, qlc:e(Q2)}), Q3 = qlc:q([X || {X} <- [{1},{2},{3}]], {lookup,true}), {'EXIT', {no_lookup_to_carry_out, _}} = (catch {foo, qlc:e(Q3)}), {'EXIT', {no_lookup_to_carry_out, _}} = (catch {foo, qlc:info(Q3)}), E1 = create_ets(1, 10), Q4 = qlc:q([{X,Y} || {X,Y} <- ets:table(E1), X =:= 3], lookup), {match_spec, _} = strip_qlc_call(Q4), [{3,3}] = qlc:e(Q4), Q5 = qlc:q([{X,Y} || {X,Y} <- ets:table(E1), X =:= 3], {lookup,false}), {table, ets, _} = strip_qlc_call(Q5), [{3,3}] = qlc:e(Q5), Q6 = qlc:q([{X,Y} || {X,Y} <- ets:table(E1), X =:= 3], {lookup,any}), {match_spec, _} = strip_qlc_call(Q6), [{3,3}] = qlc:e(Q6), ets:delete(E1)">> ], ?line run(Config, Ts), %% The 'cache' and 'unique' options of qlc/2 affects join. CUTs = [ <<"L1 = [1,2], L2 = [{1,a},{2,b}], L3 = [{a,1},{b,2}], Q = qlc:q([{X,Y,Z} || Z <- L1, {X,_} <- L2, {_,Y} <- L3, X =:= Y], [cache, unique]), {qlc,_, [{generate,_,{list,L1}}, {generate,_,{qlc,_,[{generate,_, {qlc,_,[{generate,_,{keysort,{list,L2},1,[]}}],[]}}, {generate,_,{qlc,_, [{generate,_,{keysort,{list,L3},2,[]}}],[]}},_], [{join,merge},{cache,ets},{unique,true}]}},_], [{unique,true}]} = i(Q), [{1,1,1},{2,2,1},{1,1,2},{2,2,2}] = qlc:e(Q)">>, <<"L1 = [1,2], L2 = [{1,a},{2,b}], L3 = [{a,1},{b,2}], Q = qlc:q([{X,Y,Z} || Z <- L1, {X,_} <- L2, {_,Y} <- L3, X =:= Y], []), Options = [{cache_all,ets}, unique_all], {qlc,_,[{generate,_,{qlc,_,[{generate,_,{list,L1}}], [{unique,true}]}}, {generate,_,{qlc,_, [{generate,_,{qlc,_,[{generate,_, {keysort,{qlc,_,[{generate,_,{list,L2}}], [{cache,ets},{unique,true}]}, 1,[]}}],[]}}, {generate,_,{qlc,_, [{generate,_,{keysort, {qlc,_,[{generate,_,{list,L3}}], [{cache,ets},{unique,true}]}, 2,[]}}],[]}},_], [{join,merge},{cache,ets},{unique,true}]}}, _],[{unique,true}]} = i(Q, Options), [{1,1,1},{2,2,1},{1,1,2},{2,2,2}] = qlc:e(Q, Options)">> ], ?line run(Config, CUTs), ok. join_filter(doc) -> "Various aspects of filters and join."; join_filter(suite) -> []; join_filter(Config) when is_list(Config) -> Ts = [ <<"E1 = create_ets(1, 10), Q = qlc:q([X || {X,_} <- ets:table(E1), begin A = X * X end, % ej true (?) X >= A]), {'EXIT', _} = (catch qlc:e(Q)), ets:delete(E1)">>, %% The order of filters matters. See also skip_filters(). <<"Q = qlc:q([{X,Y} || {X,Y} <- [{a,1},{b,2}], {Z,W} <- [{a,1},{c,0}], X =:= Z, begin Y/W > 0 end]), [{a,1}] = qlc:e(Q)">>, <<"Q = qlc:q([{X,Y} || {X,Y} <- [{a,1},{b,2}], {Z,W} <- [{a,1},{c,0}], begin Y/W > 0 end, X =:= Z]), {'EXIT', _} = (catch qlc:e(Q))">>, <<"etsc(fun(E1) -> etsc(fun(E2) -> F = fun() -> [foo || A <- [0], 1/A] end, Q1 = qlc:q([X || {X} <- ets:table(E1), {Y} <- ets:table(E2), F(), % invalidates next filter X =:= Y]), {qlc,_,[{generate,_,{table,{ets,table,_}}}, {generate,_,{table,{ets,table,_}}},_,_], []} = i(Q1), {'EXIT', _} = (catch qlc:e(Q1)) end, [{1},{2},{3}]) end, [{a},{b},{c}])">> ], ?line run(Config, Ts), ok. join_lookup(doc) -> "Lookup join."; join_lookup(suite) -> []; join_lookup(Config) when is_list(Config) -> Ts = [ <<"E1 = create_ets(1, 10), E2 = create_ets(5, 15), Q = qlc:q([{X,Y} || {_,Y} <- ets:table(E2), {X,_} <- ets:table(E1), X =:= Y], [{join,lookup}]), {0,1,0,0} = join_info_count(Q), R = qlc:e(Q), ets:delete(E1), ets:delete(E2), [{5,5},{6,6},{7,7},{8,8},{9,9},{10,10}] = lists:sort(R)">>, <<"E1 = create_ets(1, 10), E2 = create_ets(5, 15), F = fun(J) -> qlc:q([{X,Y} || {X,_} <- ets:table(E1), {_,Y} <- ets:table(E2), X =:= Y], {join, J}) end, Q = F(lookup), {0,1,0,0} = join_info_count(Q), R = qlc:e(Q), ets:delete(E1), ets:delete(E2), [{5,5},{6,6},{7,7},{8,8},{9,9},{10,10}] = lists:sort(R)">>, <<"etsc(fun(E1) -> E2 = qlc_SUITE:table([{1,a},{a},{1,b},{b}], 2, []), Q = qlc:q([{X,Y} || {X,Y} <- ets:table(E1), % (1) {_,Z} <- E2, % (2) (Z =:= Y) and (X =:= a) or (Z =:= Y) and (X =:= b)]), %% Cannot look up in (1) (X is keypos). Can look up (2). %% Lookup-join: traverse (1), look up in (2). {0,1,0,0} = join_info_count(Q), [{a,a},{b,a}] = qlc:e(Q) end, [{a,a},{b,a},{c,3},{d,4}])">>, <<"%% The pattern {X,_} is used to filter out looked up objects. etsc(fun(E) -> Q = qlc:q([X || {X,_} <- ets:table(E), Y <- [{a,b},{c,d},{1,2},{3,4}], X =:= element(1, Y)]), {0,1,0,0} = join_info_count(Q), [1] = qlc:e(Q) end, [{1,2},{3}])">>, <<"E = ets:new(e, [bag,{keypos,2}]), L = lists:sort([{a,1},{b,1},{c,1},{d,1}, {aa,2},{bb,2},{cc,2},{dd,2}]), true = ets:insert(E, L ++ [{aaa,1,1},{bbb,2,2},{ccc,3,3}]), Q = qlc:q([Z || {_,Y}=Z <- ets:table(E), {X} <- [{X} || X <- lists:seq(0, 10)], X =:= Y]), {0,1,0,0} = join_info_count(Q), R = qlc:e(Q), ets:delete(E), L = lists:sort(R)">>, <<"E = ets:new(e, [bag,{keypos,2}]), L = lists:sort([{a,1},{b,1},{c,1},{d,1}, {aa,2},{bb,2},{cc,2},{dd,2}]), true = ets:insert(E, L ++ [{aaa,1,1},{bbb,2,2},{ccc,3,3}]), Q = qlc:q([Z || {X} <- [{X} || X <- lists:seq(0, 10)], {_,Y}=Z <- ets:table(E), X =:= Y]), {0,1,0,0} = join_info_count(Q), R = qlc:e(Q), ets:delete(E), L = lists:sort(R)">>, <<"Q = qlc:q([{XX,YY} || {XX,X} <- [{b,1},{c,3}], {Y,YY} <- qlc_SUITE:table_lookup_error([{1,a}]), X =:= Y], {join,lookup}), {error, lookup, failed} = qlc:e(Q)">>, <<"E = create_ets(1, 10), Q = qlc:q([{X,Y} || {X,_} <- ets:table(E), {_,Y} <- qlc_SUITE:table_error([{a,1}], 1, err), X =:= Y]), {0,1,0,0} = join_info_count(Q), err = qlc:e(Q), ets:delete(E)">> ], ?line run(Config, Ts), ok. join_merge(doc) -> "Merge join."; join_merge(suite) -> []; join_merge(Config) when is_list(Config) -> Ts = [ <<"Q = qlc:q([{X,Y} || {X} <- [], {Y} <- [{1}], X =:= Y], {join,merge}), [] = qlc:e(Q) ">>, <<"Q = qlc:q([{X,Y} || {X} <- [{1}], {Y} <- [], X =:= Y], {join,merge}), [] = qlc:e(Q) ">>, <<"Q = qlc:q([{X,Y} || {X} <- [{1},{1},{1}], {Y} <- [{1},{1},{1}], X =:= Y], {join,merge}), 9 = length(qlc:e(Q)) ">>, <<"%% Two merge joins possible. Q = qlc:q([{X,Y,Z,W} || {X,Y} <- [{1,a},{1,b},{1,c}], {Z,W} <- [{1,a},{1,b},{1,c}], X =:= Z, Y =:= W]), {qlc,_,[{generate,_, {qlc,_, [{generate,_, {qlc,_,[{generate,_,{keysort,{list,_},C,[]}}],[]}}, {generate,_, {qlc,_,[{generate,_,{keysort,{list,_},C,[]}}],[]}}, _], [{join,merge}]}}, _,_],[]} = qlc:info(Q, {format,debug}), [{1,a,1,a},{1,b,1,b},{1,c,1,c}] = qlc:e(Q)">>, <<"%% As the last one, but comparison. Q = qlc:q([{X,Y,Z,W} || {X,Y} <- [{1,a},{1,b},{1,c}], {Z,W} <- [{1,a},{1,b},{1,c}], X == Z, % skipped Y =:= W]), {qlc,_,[{generate,_, {qlc,_, [{generate,_, {qlc,_,[{generate,_,{keysort,{list,_},1,[]}}],[]}}, {generate,_, {qlc,_,[{generate,_,{keysort,{list,_},1,[]}}],[]}}, _], [{join,merge}]}}, _],[]} = qlc:info(Q, {format,debug}), [{1,a,1,a},{1,b,1,b},{1,c,1,c}] = qlc:e(Q)">>, <<"%% This is no join. Q = qlc:q([{X,Y,Z,W} || {X,Y} <- [], {Z,W} <- [], X =:= Y, Z =:= W]), {0,0,0,0} = join_info_count(Q)">>, <<"%% Used to replace empty ETS tables with [], but that won't work. E1 = ets:new(e1, []), E2 = ets:new(e2, []), Q = qlc:q([{X,Z,W} || {X, Z} <- ets:table(E1), {W, Y} <- ets:table(E2), X =:= Y], {join, lookup}), [] = qlc:e(Q), ets:delete(E1), ets:delete(E2)">>, <<"Q = qlc:q([{X,Y} || {X} <- [{3},{1},{0}], {Y} <- [{1},{2},{3}], X =:= Y]), {1,0,0,2} = join_info_count(Q), [{1,1},{3,3}] = qlc:e(Q)">>, <<"QH = qlc:q([{X,Y,Z,W} || {X,Y} <- [{3,c},{2,b},{1,a}], {Z,W} <- [{2,b},{4,d},{5,e},{3,c}], X =:= Z, Y =:= W]), {1,0,0,2} = join_info_count(QH), [{2,b,2,b},{3,c,3,c}] = qlc:e(QH)">>, <<"%% QLC finds no join column at run time... QH = qlc:q([1 || X <- [{1,2,3},{4,5,6}], Y <- [{1,2},{3,4}], X =:= Y]), {0,0,0,0} = join_info_count(QH), [] = qlc:e(QH)">>, <<"QH = qlc:q([X || X <- [{1,2,3},{4,5,6}], Y <- [{1,2},{3,4}], element(1, X) =:= element(2, Y)]), {1,0,0,2} = join_info_count(QH), [{4,5,6}] = qlc:e(QH)">>, <<"Q = qlc:q([{A,X,Z,W} || A <- [a,b,c], {X,Z} <- [{a,1},{b,4},{c,6}], {W,Y} <- [{2,a},{3,b},{4,c}], X =:= Y], {cache, list}), _ = qlc:info(Q), [{a,a,1,2},{a,b,4,3},{a,c,6,4},{b,a,1,2},{b,b,4,3}, {b,c,6,4},{c,a,1,2},{c,b,4,3},{c,c,6,4}] = qlc:e(Q)">>, <<"Q = qlc:q([{X,Y} || {X,Z} <- [{a,1},{b,4},{c,6}], {W,Y} <- [{2,a},{3,b},{4,c}], Z > W, X =:= Y], {join,merge}), {qlc,_,[{generate,_,{qlc,_, [{generate,_, {qlc,_,[{generate,_,{keysort,_,1,[]}}],[]}}, {generate,_, {qlc,_,[{generate,_,{keysort,_,2,[]}}], []}},_],[{join,merge}]}}, _,_],[]} = i(Q), [{b,b},{c,c}] = qlc:e(Q)">>, <<"E1 = create_ets(1, 10), E2 = create_ets(5, 15), %% A match spec.; Q does not see Q1 and Q2 as lookup-tables. Q1 = qlc:q([X || X <- ets:table(E1)]), Q2 = qlc:q([X || X <- ets:table(E2)]), F = fun(J) -> qlc:q([{X,Y} || X <- Q1, Y <- Q2, element(1,X) =:= element(1,Y)], [{join,J}]) end, {'EXIT',{cannot_carry_out_join,_}} = (catch qlc:e(F(lookup))), Q = F(merge), {1,0,0,2} = join_info(Q), R = lists:sort(qlc:e(Q)), ets:delete(E1), ets:delete(E2), true = [{Y,Y} || X <- lists:seq(5, 10), {} =/= (Y = {X,X})] =:= R ">>, <<"E1 = create_ets(1, 10), E2 = create_ets(5, 15), Q = qlc:q([{X,Y} || X <- ets:table(E1), Y <- ets:table(E2), element(1,X) =:= element(1,Y)], [{join,merge}]), {1,0,0,2} = join_info(Q), R = lists:sort(qlc:e(Q)), ets:delete(E1), ets:delete(E2), true = [{Y,Y} || X <- lists:seq(5, 10), {} =/= (Y = {X,X})] =:= R ">>, <<"E1 = create_ets(1, 10), E2 = create_ets(5, 15), Q1 = qlc:q([Y || X <- ets:table(E1), begin Y = {X}, true end]), %% A match spec.; Q does not see Q2 as a lookup-table. %% %% OTP-6673: lookup join is considered but since there is no %% filter that can do the job of Q2, lookup join is not an option.. Q2 = qlc:q([{X} || X <- ets:table(E2)]), F = fun(J) -> qlc:q([{X,Y} || X <- Q1, Y <- Q2, element(1,X) =:= element(1,Y)], [{join,J}]) end, {'EXIT',{cannot_carry_out_join,_}} = (catch qlc:e(F(lookup))), Q = F(any), {1,0,0,2} = join_info(Q), R = lists:sort(qlc:e(Q)), ets:delete(E1), ets:delete(E2), true = [{Y,Y} || X <- lists:seq(5, 10), {} =/= (Y = {{X,X}})] =:= R ">>, <<"L1 = [{1,a},{2,a},{1,b},{2,b},{1,c},{2,c}], L2 = [{b,Y} || Y <- lists:seq(1, 10000)], F = fun(J) -> Q = qlc:q([{XX,YY} || {X,XX} <- L1, {YY,Y} <- L2, X == Y], {join,J}), qlc:q([{XX1,YY1,XX2,YY2} || {XX1,YY1} <- Q, {XX2,YY2} <- Q]) end, Qm = F(merge), Qn = F(nested_loop), true = lists:sort(qlc:e(Qm)) =:= lists:sort(qlc:e(Qn))">>, <<"L1 = [{{1,a},2},{{3,c},4}], L2 = [{a,{1,a}},{c,{4,d}}], Q = qlc:q([{X,Y} || {X,_} <- L1, {_,{Y,Z}} <- L2, X == {Y,Z} ]), {qlc,_,[{generate,_,{qlc,_, [{generate,_, {qlc,_,[{generate,_,{keysort,{list,L1},1,[]}}],[]}}, {generate,_, {qlc,_,[{generate,_,{keysort,{list,L2},2,[]}}],[]}}, _], [{join,merge}]}}],[]} = i(Q), [{{1,a},1}] = qlc:e(Q)">>, <<"etsc(fun(E1) -> etsc(fun(E2) -> Q = qlc:q([{X,Y} || {X,Y} <- ets:table(E1), % (1) {Z} <- ets:table(E2), % (2) (Z =:= X) and (Y =:= a) and (X =:= Y) or (Y =:= b) and (Z =:= Y)]), %% Cannot look up in (1) (X is keypos). Can look up (2). %% Lookup join not possible (cannot look up in (1)). %% Merge join is possible (after lookup in (2)). {1,0,0,2} = join_info_count(Q), {qlc,_, [{generate,_, {qlc,_,[{generate,_, {qlc,_,[{generate,_, {keysort, {table,{ets,table,_}}, 2,[]}},_C1],[]}}, {generate,_, {qlc,_,[{generate,_, {keysort,{table,_},1,[]}},_C2], []}}, _],[{join,merge}]}},_],[]} = i(Q), [{a,a}] = qlc:e(Q) end, [{a}]) end, [{a,1},{a,a},{b,1},{b,2}])">>, <<"Q = qlc:q([{G1,G2} || G1<- [{1}], G2 <- [{1}], element(1, G1) =:= element(1, G2)]), {1,0,0,2} = join_info(Q), [{{1},{1}}] = qlc:e(Q)">>, <<"Q = qlc:q([{X,Y} || X <- [{1}], Y <- [{1}], element(1, X) =:= element(1, Y)], {join,merge}), {1,0,0,2} = join_info(Q), [{{1},{1}}] = qlc:e(Q)">>, <<"%% Generator after the join-filter. Q = qlc:q([Z || {X} <- [{1},{2},{3}], {Y} <- [{2},{3},{4}], X =:= Y, Z <- [1,2]]), {qlc,_, [{generate,_,{qlc,_, [{generate,_,{qlc,_, [{generate,_,{keysort,{list,[{1},{2},{3}]},1,[]}}],[]}}, {generate,_,{qlc,_, [{generate,_,{keysort,{list,_},1,[]}}],[]}},_], [{join,merge}]}}, _,{generate,_,{list,_}}],[]} = i(Q), [1,2,1,2] = qlc:e(Q)">>, <<"%% X and W occur twice in the pattern of the extra join handle. Q = qlc:q([{Z,W} || {X,Z,X} <- [{1,2,1},{1,2,2}], {W,Y,W} <- [{a,1,a}], X =:= Y]), [{2,a}] = qlc:e(Q)">> ], ?line run(Config, Ts), %% Small examples. Returning an error term. ETs = [ <<"F = fun(M) -> qlc:q([{XX,YY} || {XX,X} <- [{a,1},{b,2},{bb,2},{c,3},{cc,3}], {Y,YY} <- [{0,a},{1,a},{1,aa},{2,b},{2,bb},{2,bbb}, {3,c},{3,cc}], X =:= Y], {join,M}) end, R = qlc:e(F(nested_loop)), R = qlc:e(F(merge))">>, <<"F = fun(M) -> qlc:q([{XX,YY} || {XX,X} <- [{a,1},{b,2},{bb,2},{c,3},{cc,3}], {Y,YY} <- [{0,a},{1,a},{1,aa},{2,b},{2,bb},{2,bbb}, {4,d}], X =:= Y], {join,M}) end, R = qlc:e(F(nested_loop)), R = qlc:e(F(merge))">>, <<"Q = qlc:q([{XX,YY} || {XX,X} <- [{b,1},{c,3}], {Y,YY} <- [{1,a}], X =:= Y], {join,merge}), [{b,a}] = qlc:e(Q)">>, <<"Q = qlc:q([{XX,YY} || {XX,X} <- [{b,1},{c,3}], {Y,YY} <- qlc_SUITE:table_error([{1,a}], 1, err), X =:= Y], {join,merge}), err = qlc:e(Q)">>, <<"Q = qlc:q([{XX,YY} || {XX,X} <- [{a,1},{aa,1}], {Y,YY} <- [{1,a}], X =:= Y], {join,merge}), [{a,a},{aa,a}] = qlc:e(Q)">>, <<"Q = qlc:q([{XX,YY} || {XX,X} <- qlc_SUITE:table_error([{a,1},{aa,1}], 2, err), {Y,YY} <- [{1,a}], X =:= Y], {join,merge}), err = qlc:e(Q)">>, <<"Q = qlc:q([{XX,YY} || {XX,X} <- [{a,1}], {Y,YY} <- [{1,a},{1,aa}], X =:= Y], {join,merge}), [{a,a},{a,aa}]= qlc:e(Q)">>, <<"Q = qlc:q([{XX,YY} || {XX,X} <- qlc_SUITE:table_error([{a,1}], 2, err), {Y,YY} <- [{1,a},{1,aa}], X =:= Y], {join,merge}), C = qlc:cursor(Q), [{a,a}] = qlc:next_answers(C, 1), qlc:delete_cursor(C), err = qlc:e(Q)">>, <<"F = fun(M) -> qlc:q([{XX,YY} || {XX,X} <- [{a,1},{b,2},{bb,2},{c,3},{cc,3}], {Y,YY} <- [{0,a},{1,a},{1,aa},{2,b}, {2,bb},{2,bbb}], X =:= Y], {join,M}) end, %% [{a,a},{a,aa},{b,b},{b,bb},{b,bbb},{bb,b},{bb,bb},{bb,bbb}] R = qlc:e(F(nested_loop)), R = qlc:e(F(merge))">>, <<"F = fun(M) -> qlc:q([{XX,YY} || {XX,X} <- [{a,1},{b,2},{bb,2},{c,3},{cc,3}], {Y,YY} <- qlc_SUITE:table_error([{0,a},{1,a},{1,aa}, {2,b},{2,bb}, {2,bbb}], 1, err), X =:= Y], {join,M}) end, %% [{a,a},{a,aa},{b,b},{b,bb},{b,bbb},{bb,b},{bb,bb},{bb,bbb}] err = qlc:e(F(nested_loop)), err = qlc:e(F(merge))">>, <<"Q = qlc:q([{XX,YY} || {XX,X} <- qlc_SUITE:table_error([], 2, err), {Y,YY} <- [{2,b},{3,c}], X =:= Y], {join,merge}), err = qlc:e(Q)">>, <<"Q = qlc:q([{XX,YY} || {XX,X} <- [{a,1},{c,3}], {Y,YY} <- [{2,b},{3,c}], X =:= Y], {join,merge}), [{c,c}] = qlc:e(Q)">>, <<"Q = qlc:q([{XX,YY} || {XX,X} <- [{a,1},{aa,1}], {Y,YY} <- [{1,a},{1,aa}], X =:= Y], {join,merge}), [{a,a},{a,aa},{aa,a},{aa,aa}] = qlc:e(Q)">>, <<"Q = qlc:q([{XX,YY} || {XX,X} <- [{a,1},{b,2}], {Y,YY} <- [{1,a},{1,aa}], X =:= Y], {join,merge}), [{a,a},{a,aa}] = qlc:e(Q)">>, <<"Q = qlc:q([{XX,YY} || {XX,X} <- [{a,1},{b,2}], {Y,YY} <- qlc_SUITE:table_error([{1,a},{1,aa}], 1, err), X =:= Y], {join,merge}), err = qlc:e(Q)">>, <<"Q = qlc:q([{XX,YY} || {XX,X} <- [{a,1},{b,2}], {Y,YY} <- [{1,a},{1,aa},{1,aaa},{1,aaaa}], X =:= Y], {join,merge}), [{a,a},{a,aa},{a,aaa},{a,aaaa}]= qlc:e(Q)">>, <<"Q = qlc:q([{element(1, X), element(2, Y)} || X <- [{a,1},{aa,1}], Y <- [{1,a},{1,aa}], element(2, X) =:= element(1, Y)], {join,merge}), [{a,a},{a,aa},{aa,a},{aa,aa}] = qlc:e(Q)">>, <<"Q = qlc:q([{element(1, X), element(2, Y)} || X <- [{a,1},{aa,1}], Y <- qlc_SUITE:table_error([], 1, err), element(2, X) =:= element(1, Y)], {join,merge}), err = qlc:e(Q)">>, <<"Q = qlc:q([{element(1, X), element(2, Y)} || X <- qlc_SUITE:table_error([{a,1}], 2, err), Y <- [{2,b}], element(2, X) =:= element(1, Y)], {join,merge}), err = qlc:e(Q)">>, <<"Q = qlc:q([{XX,YY} || {XX,X} <- [{1,a},{'1b',b},{2,b}], {Y,YY} <- [{a,1},{b,'1b'},{c,1}], X == Y], {join,merge}), [{1,1},{'1b','1b'},{2,'1b'}] = qlc:e(Q)">>, <<"Q = qlc:q([{XX,YY} || {XX,X} <- qlc_SUITE:table_error([{1,a},{'1b',b},{2,b}], 2, err), {Y,YY} <- [{a,1},{b,'1b'},{c,1}], X == Y], {join,merge}), err = qlc:e(Q)">> ], ?line run(Config, ETs), %% Mostly examples where temporary files are needed while merging. FTs = [ <<"L1 = [{Y,a} || Y <- lists:seq(1, 2)], L2 = [{a,Y} || Y <- lists:seq(1, 10000)], F = fun(J) -> qlc:q([{XX,YY} || {XX,X} <- L1, {Y,YY} <- L2, X == Y], {join,J}) end, Qm = F(merge), Qn = F(nested_loop), true = qlc:e(Qm,{max_list_size, 0}) =:= qlc:e(Qn)">>, <<"L1 = [{Y,a} || Y <- lists:seq(1, 2)], L2 = [{a,Y} || Y <- lists:seq(1, 10000)], Q = qlc:q([{XX,YY} || {XX,X} <- L1, {Y,YY} <- L2, X == Y], {join,merge}), {error,_,{file_error,_,_}} = qlc:e(Q, [{max_list_size,64*1024},{tmpdir,\"/a/b/c\"}])">>, <<"L1 = qlc_SUITE:table_error([{1,a},{2,a}], 2, err), L2 = [{a,Y} || Y <- lists:seq(1, 10000)], F = fun(J) -> qlc:q([{XX,YY} || {XX,X} <- L1, {Y,YY} <- L2, X == Y], {join,J}) end, Qm = F(merge), Qn = F(nested_loop), err = qlc:e(Qm, {max_list_size,64*1024}), err = qlc:e(Qn)">>, <<"L1 = [{Y,a} || Y <- lists:seq(1, 2)], L2 = qlc_SUITE:table_error([{a,Y} || Y <- lists:seq(1, 10000)], 1, err), F = fun(J) -> qlc:q([{XX,YY} || {XX,X} <- L1, {Y,YY} <- L2, X == Y], {join,J}) end, Qm = F(merge), Qn = F(nested_loop), err = qlc:e(Qm, {max_list_size,64*1024}), err = qlc:e(Qn)">>, <<"L1 = [{Y,a} || Y <- lists:seq(1, 2)] ++ [{'1b',b},{2,b}] ++ [{Y,d} || Y <- lists:seq(1, 2)], L2 = [{a,Y} || Y <- lists:seq(1, 10000)] ++ [{b,'1b'}] ++ [{c,1}] ++ [{d,Y} || Y <- lists:seq(1, 10000)], F = fun(J) -> qlc:q([{XX,YY} || {XX,X} <- L1, {Y,YY} <- L2, X == Y], {join,J}) end, Qm = F(merge), Qn = F(nested_loop), true = lists:sort(qlc:e(Qm, {max_list_size,64*1024})) =:= lists:sort(qlc:e(Qn))">>, <<"F = fun(J) -> qlc:q([{XX,YY} || {XX,X} <- [{Y,a} || Y <- lists:seq(1, 2)], {Y,YY} <- [{a,Y} || Y <- lists:seq(1,100000)], X == Y], {join,J}) end, Qm = F(merge), Qn = F(nested_loop), true = qlc:e(Qm, {max_list_size,64*1024}) =:= qlc:e(Qn)">>, %% More than one join in one QLC expression. <<"L1 = [{Y,a} || Y <- lists:seq(1, 2)], L2 = [{a,Y} || Y <- lists:seq(1, 10000)], F = fun(J) -> Q = qlc:q([{XX,YY} || {XX,X} <- L1, {Y,YY} <- L2, X == Y, begin XX > 1 end, begin YY > 9999 end], {join,J}), qlc:q([{XX1,YY1,XX2,YY2} || {XX1,YY1} <- Q, {XX2,YY2} <- Q]) end, Qm = F(merge), Qn = F(nested_loop), R1 = lists:sort(qlc:e(Qm, {max_list_size,64*1024})), R2 = lists:sort(qlc:e(Qm, {max_list_size,1 bsl 31})), true = R1 =:= lists:sort(qlc:e(Qn)), true = R1 =:= R2">>, <<"L1 = [{Y,a} || Y <- lists:seq(1, 2)], L2 = [{a,Y} || Y <- lists:seq(1, 10000)], F = fun(J) -> Q = qlc:q([{XX,YY} || {XX,X} <- L1, {Y,YY} <- L2, X == Y, begin XX > 1 end, begin YY > 9999 end], {join,J}), qlc:q([{XX1,YY1,XX2,YY2} || {XX1,YY1} <- Q, {XX2,YY2} <- Q, throw(thrown)]) end, Qm = F(merge), thrown = (catch {any_term, qlc:e(Qm, {max_list_size,64*1024})})">>, <<"%% Bigger than 64*1024. T1 = {1, lists:seq(1, 20000)}, L1 = [{a,T1},{b,T1}], L2 = [{T1,a},{T1,b}], F = fun(J) -> qlc:q([{XX,YY} || {XX,X} <- L1, {Y,YY} <- L2, X == Y], {join,J}) end, Qm = F(merge), Qn = F(nested_loop), R = [{a,a},{a,b},{b,a},{b,b}], R = qlc:e(Qm, {max_list_size,64*1024}), R = qlc:e(Qn)">>, <<"%% Bigger than 64*1024. No temporary files. T1 = {1, lists:seq(1, 20000)}, L1 = [{a,T1},{b,T1}], L2 = [{T1,a},{T1,b}], F = fun(J) -> qlc:q([{XX,YY} || {XX,X} <- L1, {Y,YY} <- L2, X == Y], {join,J}) end, Qm = F(merge), Qn = F(nested_loop), R = [{a,a},{a,b},{b,a},{b,b}], R = qlc:e(Qm, {max_list_size,1 bsl 31}), R = qlc:e(Qn)">> ], ?line run(Config, FTs), ok. join_sort(doc) -> "Merge join optimizations (avoid unnecessary sorting)."; join_sort(suite) -> []; join_sort(Config) when is_list(Config) -> Ts = [ <<"H1_1 = qlc:keysort(1, [{1,2,3},{4,5,6}]), H1 = qlc:q([X || X <- H1_1], unique), H2 = qlc:keysort(2, [{1,2},{3,4}]), H3 = qlc:q([{X,Y} || {X,_,_} <- H1, {_,Y} <- H2, X =:= Y]), {1,0,0,2} = join_info(H3), [{4,4}] = qlc:e(H3)">>, <<"H1_1 = qlc:keysort(1, [{1,2,3},{4,5,6}]), H1 = qlc:q([X || X <- H1_1], unique), % keeps the order H2 = qlc:keysort(2, [{1,2},{3,4}]), H3 = qlc:q([{X,Y} || {X,_,_} <- H1, % no extra keysort {Y,_} <- H2, % an extra keysort X =:= Y]), {1,0,0,3} = join_info(H3), [{1,1}] = qlc:e(H3)">>, <<"H1_1 = qlc:keysort(1, [{1,2,3},{4,5,6}], {tmpdir,\"\"}), H1 = qlc:q([X || X <- H1_1], unique), H2 = qlc:keysort(2, [{1,2},{3,4}]), H3 = qlc:q([{X,Y} || {_,X,_} <- H1, {_,Y} <- H2, X =:= Y]), {1,0,0,3} = join_info(H3), [{2,2}] = qlc:e(H3)">>, <<"H1_1 = qlc:keysort(1, [{1,2,3},{4,5,6}], {tmpdir,\"\"}), H1 = qlc:q([X || X <- H1_1], unique), H2 = qlc:keysort(2, [{1,2},{3,4}]), H3 = qlc:q([{X,Y} || {_,X,_} <- H1, {_,Y} <- H2, X =:= Y]), {1,0,0,3} = join_info(H3), [{2,2}] = qlc:e(H3)">>, <<"H1 = qlc:sort([{1,a},{2,b},{3,c}]), %% Since H1 is sorted it is also keysorted on the first column. Q = qlc:q([{X, Y} || {X,_} <- H1, {Y} <- [{0},{1},{2}], X == Y]), {1,0,0,1} = join_info(Q), [{1,1},{2,2}] = qlc:e(Q)">>, <<"H1 = qlc:sort([{r,a,1},{r,b,2},{r,c,3}]), Q = qlc:q([{X, Y} || {r,_,X} <- H1, % needs keysort(3) {Y} <- [{0},{1},{2}], X == Y]), {1,0,0,2} = join_info(Q), [{1,1},{2,2}] = qlc:e(Q)">>, <<"QH = qlc:q([X || X <- [{1,2,3},{4,5,6}], Y <- qlc:sort([{1,2},{3,4}]), element(1, X) =:= element(2, Y)]), {1,0,0,2} = join_info_count(QH), [{4,5,6}] = qlc:e(QH)">>, <<"H1_1 = qlc:keysort(1, [{1,2,3},{4,5,6},{1,2,3}]), H1 = qlc:q([X || X <- H1_1], unique), H2 = qlc:keysort(2, [{2,1},{3,4}]), H3 = qlc:q([{X,Y} || {X,_,_} <- H1, {_,Y} <- H2, X =:= Y]), H4 = qlc:keysort(1, [{1,2},{3,4},{4,a}]), H5 = qlc:q([{X,Y} || {X,_} <- H4, {_,Y} <- H3, X =:= Y]), {2,0,0,3} = join_info_count(H5), [{1,1},{4,4}]= qlc:e(H5)">>, <<" H1 = qlc:keysort(2, [{1,a,u},{2,b,k},{3,c,l}]), H2 = qlc:q([{a,X,Y,a} || {1,X,u} <- H1, {2,Y,k} <- H1]), %% Neither H1 nor H2 need to be key-sorted %% (the columns are constant). H3 = qlc:q([{A,B,C,D,E,F,G,H} || {A,B,C,D} <- H2, {E,F,G,H} <- H2, A =:= H], {join,merge}), {1,0,0,4} = join_info_count(H3), [{a,a,b,a,a,a,b,a}] = qlc:e(H3)">>, <<"%% Q1 is sorted on X or Y. Q1 = qlc:q([{X,Y} || {X,_} <- qlc:keysort(1, [{1,a},{2,b}]), {_,Y} <- qlc:keysort(2, [{aa,11},{bb,22}]), X < Y]), [{1,11},{1,22},{2,11},{2,22}] = qlc:e(Q1), Q = qlc:q([{X,Y} || {X,_} <- Q1, % no need to sort Q1 {Y} <- [{0},{1},{2},{3}], X =:= Y]), {1,0,0,3} = join_info_count(Q), [{1,1},{1,1},{2,2},{2,2}] = qlc:e(Q)">>, <<"H1 = qlc:keysort([2], [{r,1},{r,2},{r,3}]), %% H1 is actually sorted, but this info is not captured. Q = qlc:q([{X, Y} || {r,X} <- H1, {Y} <- [{0},{1},{2}], X == Y]), {1,0,0,2} = join_info_count(Q), [{1,1},{2,2}] = qlc:e(Q)">>, <<"%% Two leading constants columns and sorted objects %% implies keysorted on column 3. H1 = qlc:sort(qlc:q([{a,X,Y} || {X,Y} <- [{1,2},{2,3},{3,3}]])), H2 = qlc:q([{X,Y} || {a,3,X} <- H1, {a,2,Y} <- H1, X =:= Y]), {1,0,0,0} = join_info_count(H2), [{3,3}] = qlc:e(H2)">>, <<"QH = qlc:q([{X,Y} || {X,Y} <- [{1,4},{1,3}], {Z} <- [{1}], X =:= Z, (Y =:= 3) or (Y =:= 4)]), {1,0,0,1} = join_info_count(QH), [{1,4},{1,3}] = qlc:e(QH)">>, <<"E = ets:new(join, [ordered_set]), true = ets:insert(E, [{1,a},{2,b},{3,c}]), Q = qlc:q([{X, Y} || {X,_} <- ets:table(E), % no need to sort {Y} <- [{0},{1},{2}], X == Y], {join,merge}), {1,0,0,1} = join_info(Q), [{1,1},{2,2}] = qlc:e(Q), ets:delete(E)">>, <<"H1 = qlc:sort([{r,1,a},{r,2,b},{r,3,c}]), Q = qlc:q([{X, Y} || {r,X,_} <- H1, % does not need keysort(3) {Y} <- [{0},{1},{2}], X == Y]), {1,0,0,1} = join_info(Q), [{1,1},{2,2}] = qlc:e(Q)">>, <<"H1 = qlc:keysort(2,[{r,1},{r,2},{r,3}]), H2 = [{a},{b}], %% Several columns in different qualifiers have initial %% constant columns. H3 = qlc:keysort(1,[{c1,c2,1},{foo,bar,2},{c1,c2,3},{c1,c2,2}]), Q = qlc:q([{r,X,Y,Z} || {r,X} <- H1, {Y} <- H2, {c1,c2,Z} <- H3, X =:= Z], {join,merge}), {1,0,0,3} = join_info(Q), [{r,1,a,1},{r,1,b,1},{r,2,a,2},{r,2,b,2},{r,3,a,3},{r,3,b,3}] = qlc:e(Q)">>, <<"H1 = qlc:keysort(2,[{r,1},{r,2},{r,3}]), H2 = [{a},{b}], %% As the last one, but one keysort less. H3 = qlc:keysort(3,[{c1,c2,1},{foo,bar,2},{c1,c2,3},{c1,c2,2}]), Q = qlc:q([{r,X,Y,Z} || {r,X} <- H1, {Y} <- H2, {c1,c2,Z} <- H3, X =:= Z], {join,merge}), {1,0,0,2} = join_info(Q), [{r,1,a,1},{r,1,b,1},{r,2,a,2},{r,2,b,2},{r,3,a,3},{r,3,b,3}] = qlc:e(Q)">>, <<"H1 = qlc:keysort(2,[{r,1},{r,2},{r,3}]), H2 = [{a},{b}], H3 = qlc:keysort(1,[{c1,c2,1},{foo,bar,2},{c1,c2,3},{c1,c2,2}]), %% One generator before the joined generators. Q = qlc:q([{r,X,Y,Z} || {Y} <- H2, {r,X} <- H1, {c1,c2,Z} <- H3, X =:= Z], {join,merge}), {1,0,0,3} = join_info(Q), [{r,1,a,1},{r,2,a,2},{r,3,a,3},{r,1,b,1},{r,2,b,2},{r,3,b,3}] = qlc:e(Q)">>, <<"H1 = [{a,1},{b,2},{c,3},{d,4}], H2 = [{a},{b}], H3 = [{c1,c2,a},{foo,bar,b},{c1,c2,c},{c1,c2,d}], %% A couple of \"extra\" filters and generators. Q = qlc:q([{X,Y,Z} || {X,_} <- H1, {Y} <- H2, X > Y, {c1,c2,Z} <- H3, {W} <- [{a},{b}], W > a, X =:= Z]), {1,0,0,2} = join_info(Q), [{c,a,c},{c,b,c},{d,a,d},{d,b,d}] = qlc:e(Q)">>, <<"H1 = qlc:keysort(2,[{r,1},{r,2},{r,3}]), H2 = qlc:sort([{c1,c2,1},{foo,bar,2},{c1,c2,3},{c1,c2,2}]), %% H2 is sorted, no keysort necessary. %% This example shows that the 'filter-part' of the pattern %% ({c1,c2,Z}) should be evaluated _before_ the join. %% Otherwise the objects cannot be assumed to be keysort:ed on the %% third column (if merge join), and lookup-join would lookup %% more keys than necessary. Q = qlc:q([{r,X,Z} || {r,X} <- H1, {c1,c2,Z} <- H2, X =:= Z] ,{join,merge}), {1,0,0,1} = join_info(Q), [{r,1,1},{r,2,2},{r,3,3}] = qlc:e(Q)">>, <<"H1 = [{1,a},{2,b},{3,c}], H2 = [{0,0},{1,1},{2,2}], H3 = qlc:q([{A,C,D} || {A,_B} <- H1, {C,D} <- H2, A == D, C == D]), H4 = [{1,1},{2,2},{3,3}], H5 = qlc:q([{X,Y} || {X,_,_} <- H3, % no need to sort this one (merge join) {_,Y} <- H4, X == Y]), Q = qlc:q([{X,Y} || {X,_} <- H5, % no need to sort this one {Y,_} <- H4, X == Y]), {{3,0,0,4},{3,0,0,6}} = join_info(Q), [{1,1},{2,2}] = qlc:e(Q)">>, <<"%% There is an extra test (_C1, element(1, X) =:= 1) that is not %% necessary since the match spec does the same check. This can be %% improved upon. Q = qlc:q([{X,Y} || X <- [{2},{1}], element(1, X) =:= 1, Y=_ <- [{2},{1}], element(1, X) =:= element(1, Y)]), {qlc,_, [{generate,_,{qlc,_, [{generate,_,{qlc,_, [{generate,_,{list,{list,_},_}}, _C1],[]}}, {generate,_,{qlc,_, [{generate,_,{list,[{2},{1}]}}, _C2],[]}},_], [{join,merge}]}},_],[]} = i(Q), {1,0,0,0} = join_info_count(Q), [{{1},{1}}] = qlc:e(Q)">>, <<"etsc(fun(E) -> L = [{a,b,a},{c,d,b},{1,2,a},{3,4,b}], Q = qlc:q([P1 || {X,2,Z}=P1 <- ets:table(E), Y <- L, X =:= 1, Z =:= a, P1 =:= Y, X =:= element(1, Y)]), {1,0,0,0} = join_info_count(Q), [{1,2,a}] = qlc:e(Q) end, [{1,2,a},{3,4,b}])">>, %% Merge join on Z and element(3, Y). No need to sort! <<"etsc(fun(E) -> L = [{a,b,a},{c,d,b},{1,2,a},{3,4,b}], Q = qlc:q([P1 || {X,2,Z}=P1 <- ets:table(E), Y <- L, (X =:= 1) or (X =:= 2), Z =:= a, P1 =:= Y, X =:= element(1, Y)]), {1,0,0,0} = join_info_count(Q), [{1,2,a}] = qlc:e(Q) end, [{1,2,a},{3,4,b}])">>, <<"%% Y is constant as well as X. No keysort, which means that %% Y must be filtered before merge join. etsc(fun(E) -> Q = qlc:q([X || {1,2}=X <- ets:table(E), Y <- [{a,b},{c,d},{1,2},{3,4}], X =:= Y, element(1, X) =:= element(1, Y)]), {1,0,0,0} = join_info_count(Q), [{1,2}] = qlc:e(Q) end, [{1,2},{3,4}])">> ], ?line run(Config, Ts), ok. join_complex(doc) -> "Join of more than two columns."; join_complex(suite) -> []; join_complex(Config) when is_list(Config) -> Ts = [{three, <<"three() -> L = [], Q = qlc:q([{X,Y,Z} || {X,_} <- L, {_,Y} <- L, {Z,_} <- L, X =:= Y, Y == Z ]), qlc:e(Q).">>, [], {warnings,[{3,qlc,too_complex_join}]}}, {two, <<"two() -> Q = qlc:q([{X,Y,Z,W} || {X} <- [], {Y} <- [], {Z} <- [], {W} <- [], X =:= Y, Z =:= W],{join,merge}), qlc:e(Q).">>, [], {warnings,[{2,qlc,too_many_joins}]}} ], ?line compile(Config, Ts), Ts2 = [{three, <<"three() -> L = [], Q = qlc:q([{X,Y,Z} || {X,_} <- L, {_,Y} <- L, {Z,_} <- L, X =:= Y, Y == Z ]), qlc:e(Q).">>, [], {[], ["cannot handle join of three or more generators efficiently"]}}, {two, <<"two() -> Q = qlc:q([{X,Y,Z,W} || {X} <- [], {Y} <- [], {Z} <- [], {W} <- [], X =:= Y, Z =:= W],{join,merge}), qlc:e(Q).">>, [], {[],["cannot handle more than one join efficiently"]}} ], ?line compile_format(Config, Ts2), ok. otp_5644(doc) -> "OTP-5644. Handle the new language element M:F/A."; otp_5644(suite) -> []; otp_5644(Config) when is_list(Config) -> Ts = [ <<"Q = qlc:q([fun modul:mfa/0 || _ <- [1,2], is_function(fun modul:mfa/0, 0)]), [_,_] = qlc:eval(Q)">> ], ?line run(Config, Ts), ok. otp_5195(doc) -> "OTP-5195. Allow traverse functions returning terms."; otp_5195(suite) -> []; otp_5195(Config) when is_list(Config) -> %% Several minor improvements have been implemented in OTP-5195. %% The test cases are spread all over... except these. %% %% Traverse functions returning terms. Ts = [<<"L = [1,2,3], Err = {error,modul,err}, H = qlc:q([X || X <- qlc_SUITE:table_error(L, Err)]), Err = qlc:e(H)">>, <<"Err = {error,modul,err}, TravFun = fun() -> Err end, H1 = qlc:sort(qlc:q([X || X <- qlc:table(TravFun, [])])), H = qlc:q([{X} || X <- H1]), Err = qlc:e(H)">>, <<"L = [1,2,3], Err = {error,modul,err}, H = qlc:q([X || X <- qlc_SUITE:table_error(L, Err)]), C = qlc:cursor(H), R = qlc:next_answers(C, all_remaining), qlc:delete_cursor(C), Err = R">>, <<"L = [1,2,3], Err = {error,modul,err}, H = qlc:q([X || X <- qlc_SUITE:table_error(L, Err)]), F = fun(Obj, A) -> A++[Obj] end, Err = qlc:fold(F, [], H)">>, <<"Err = {error,modul,err}, TravFun = fun() -> Err end, H1 = qlc:sort(qlc:q([X || X <- qlc:table(TravFun, [])])), H = qlc:q([{X} || X <- H1]), F = fun(Obj, A) -> A++[Obj] end, Err = qlc:fold(F, [], H)">>, <<"Q1 = qlc:append([qlc:append([ugly()]),[3]]), Q = qlc:q([X || X <- Q1]), 42 = qlc:e(Q), ok. ugly() -> [apa | fun() -> 42 end]. foo() -> bar">>, <<"L = [1,2,3], Err = {error,modul,err}, H = qlc:q([X || X <- qlc_SUITE:table_error(L, Err)]), H1 = qlc:q([X || X <- H], unique), Err = qlc:e(H1)">>, <<"Err = {error, module, err}, L = [1,2,3], H1 = qlc:q([{X} || X <- qlc_SUITE:table_error(L, Err)]), H = qlc:q([{X,Y,Z} || X <- H1, Y <- H1, Z <- L], cache), qlc:e(H, cache_all)">>, <<"Err = {error, module, err}, L = [1,2,3], H1 = qlc:q([X || X <- qlc_SUITE:table_error(L, Err)]), H = qlc:q([{X,Y,Z} || X <- H1, Y <- H1, Z <- L], cache), qlc:e(H, [cache_all,unique_all])">>, <<"L = [{1},{2},{3}], H = qlc:q([X || {X} <- qlc_SUITE:table_lookup_error(L), X =:= 2]), {error, lookup, failed} = qlc:e(H)">>, %% The traverse function can return any value, but it must not %% return an improper list. Improper lists must not be given anyway. <<"{'EXIT', {{badfun,a},_}} = (catch qlc:e(qlc:q([{X} || X <- [1 | a], begin true end])))">> ], ?line run(Config, Ts), Ts2 = [<<"Q = qlc:q([{X,Y} || {X} <- [{1},{2},{3}], begin %% Used to generate a badly formed file Y = 3, true end, X =:= Y]), [{3,3}] = qlc:e(Q)">>], ?line run(Config, Ts2), ok. otp_6038_bug(doc) -> "OTP-6038. Bug fixes: unique and keysort; cache."; otp_6038_bug(suite) -> []; otp_6038_bug(Config) when is_list(Config) -> %% The 'unique' option can no longer be merged with the keysort options. %% This used to return [{1,a},{1,c},{2,b},{2,d}], but since %% file_sorter:keysort now removes duplicates based on keys, the %% correct return value is [{1,a},{2,b}]. Ts = [<<"H1 = qlc:q([X || X <- [{1,a},{2,b},{1,c},{2,d}]], unique), H2 = qlc:keysort(1, H1, [{unique,true}]), [{1,a},{2,b}] = qlc:e(H2)">>], ?line run(Config, Ts), %% Sometimes the cache options did not empty the correct tables. CTs = [ <<"Options = [cache,unique], V1 = qlc:q([{X,Y} || X <- [1,2], Y <- [3]], Options), V2 = qlc:q([{X,Y} || X <- [a,b], Y <- V1]), V3 = qlc:q([{X,Y} || X <- [5,6], Y <- [7]], Options), Q = qlc:q([{X,Y} || X <- V2, Y <- V3]), R = qlc:e(Q), L1 = [{X,Y} || X <- [1,2], Y <- [3]], L2 = [{X,Y} || X <- [a,b], Y <- L1], L3 = [{X,Y} || X <- [5,6], Y <- [7]], L = [{X,Y} || X <- L2, Y <- L3], true = R =:= L">>, <<"Options = [cache,unique], V1 = qlc:q([{X,Y} || X <- [1,2], Y <- [3]], Options), V2 = qlc:q([{X,Y} || X <- [a,b], Y <- V1]), V3 = qlc:q([{X,Y} || X <- [5,6], Y <- [7]], Options), V4 = qlc:q([{X,Y} || X <- V2, Y <- V3], Options), Q = qlc:q([{X,Y} || X <- [1,2], Y <- V4]), R = qlc:e(Q), L1 = [{X,Y} || X <- [1,2], Y <- [3]], L2 = [{X,Y} || X <- [a,b], Y <- L1], L3 = [{X,Y} || X <- [5,6], Y <- [7]], L4 = [{X,Y} || X <- L2, Y <- L3], L = [{X,Y} || X <- [1,2], Y <- L4], true = R =:= L">> ], ?line run(Config, CTs), ok. otp_6359(doc) -> "OTP-6359. dets:select() never returns the empty list."; otp_6359(suite) -> []; otp_6359(Config) when is_list(Config) -> dets:start(), T = luna, Fname = filename(T, Config), Ts = [ [<<"T = luna, Fname = \"">>, Fname, <<"\", {ok, _} = dets:open_file(T, [{file,Fname}]), Q = qlc:q([F || F <- dets:table(T), (F band ((1 bsl 0)) =/= 0), true]), [] = qlc:eval(Q), ok = dets:close(T), file:delete(\"">>, Fname, <<"\"), ok">>] ], ?line run(Config, Ts), ok. otp_6562(doc) -> "OTP-6562. compressed = false (should be []) when sorting before join."; otp_6562(suite) -> []; otp_6562(Config) when is_list(Config) -> Bug = [ %% This example uses a file to sort E2 on the second column. It is %% not easy to verify that this happens; the file_sorter module's %% size option cannot be set in this case. But it is not likely %% that the default size (512 KiB) will ever change, so it should %% be future safe. <<"E1 = create_ets(1, 10), E2 = create_ets(5, 150000), Q = qlc:q([{XX,YY} || {X,XX} <- ets:table(E1), {YY,Y} <- ets:table(E2), X == Y], {join,merge}), [{5,5},{6,6},{7,7},{8,8},{9,9},{10,10}] = qlc:e(Q), ets:delete(E1), ets:delete(E2)">> ], ?line run(Config, Bug), Bits = [ {otp_6562_1, <<"otp_6562_1() -> Q = qlc:q([X || <<X:8>> <= <<\"hej\">>]), qlc:info(Q). ">>, [], {errors,[{2,qlc,binary_generator}], []}} ], ?line [] = compile(Config, Bits), ?line R1 = {error,qlc,{1,qlc,binary_generator}} = qlc:string_to_handle("[X || <<X:8>> <= <<\"hej\">>]."), ?line "1: cannot handle binary generators\n" = lists:flatten(qlc:format_error(R1)), ok. otp_6590(doc) -> "OTP-6590. Bug fix (join info)."; otp_6590(suite) -> []; otp_6590(Config) when is_list(Config) -> Ts = [<<"fun(Tab1Value) -> Q = qlc:q([T1#tab1.id || T1 <- [#tab1{id = id1, value = v, tab2_id = id}], T2 <- [#tab2{id = id}], T1#tab1.value =:= Tab1Value, T1#tab1.tab2_id =:= T2#tab2.id]), [id1] = qlc:e(Q) end(v)">>], ?line run(Config, <<"-record(tab1, {id, tab2_id, value}). -record(tab2, {id, value}).\n">>, Ts), ok. otp_6673(doc) -> "OTP-6673. Optimizations and fixes."; otp_6673(suite) -> []; otp_6673(Config) when is_list(Config) -> Ts_PT = [<<"etsc(fun(E1) -> etsc(fun(E2) -> Q = qlc:q([{A,B,C,D} || {A,B} <- ets:table(E1), {C,D} <- ets:table(E2), A =:= 2, % lookup B =:= D, % join C =:= g]), % lookup invalidated by join {qlc,_,[{generate,_, {qlc,_, [{generate,_, {qlc,_,[{generate,_, {keysort, {list,{table,_}, [{{'$1','$2'},[],['$_']}]}, 2,[]}},_],[]}}, {generate,_,{qlc,_, [{generate,_, {keysort,{table,_},2,[]}}], []}},_], [{join,merge}]}},_,_],[]} = i(Q), [{2,y,g,y}] = qlc:e(Q) end, [{f,x},{g,y},{h,z}]) end, [{1,x},{2,y},{3,z}])">>, <<"etsc(fun(E1) -> etsc(fun(E2) -> Q = qlc:q([{A,B,C,D} || {A,B} <- ets:table(E1), {C,D} <- ets:table(E2), A =:= 2, % lookup C =:= g, % lookup B =:= D]), % join {qlc,_,[{generate,_, {qlc,_, [{generate,_, {qlc,_,[{generate,_, {keysort, {list,{table,_}, [{{'$1','$2'},[],['$_']}]}, 2,[]}},_],[]}}, {generate,_,{qlc,_, [{generate,_, {keysort, {list,{table,_}, [{{'$1','$2'},[],['$_']}]}, 2,[]}},_],[]}},_], [{join,merge}]}},_],[]} = i(Q), [{2,y,g,y}] = qlc:e(Q) end, [{f,x},{g,y},{h,z}]) end, [{1,x},{2,y},{3,z}])">>], ?line run(Config, Ts_PT), MS = ets:fun2ms(fun({X,_Y}=T) when X > 1 -> T end), Ts_RT = [ [<<"%% Explicit match-spec. ets:table() ensures there is no lookup %% function, which means that lookup join will not be considered. MS = ">>, io_lib:format("~w", [MS]), <<", etsc(fun(E) -> F = fun(J) -> qlc:q([{X,W} || {X,_Y} <- ets:table(E,{traverse, {select,MS}}), {Z,W} <- [{1,1},{2,2},{3,3}], X =:= Z], {join,J}) end, Qm = F(any), [{2,2},{3,3}] = qlc:e(Qm), {'EXIT',{cannot_carry_out_join,_}} = (catch qlc:e(F(lookup))) end, [{1,a},{2,b},{3,c}])">>], <<"%% The filter 'A =< y' can be evaluated by traversing E1 using a %% match specification, but then lookup join cannot use E1 for %% looking up keys. This example shows that the filter is kept if %% lookup join is employed (otherwise it is optimized away since %% the match spec is used). etsc(fun(E1) -> Q = qlc:q([{A,B,C,D} || {A,B} <- ets:table(E1), {C,D} <- [{x,f},{y,g},{z,h}], A =< y, % kept A =:= C], {join,lookup}), [{x,1,x,f},{y,2,y,g}] = lists:sort(qlc:e(Q)) end, [{x,1},{y,2},{z,3}])">> ], ?line run(Config, Ts_RT), ok. otp_6964(doc) -> "OTP-6964. New option 'tmpdir_usage'."; otp_6964(suite) -> []; otp_6964(Config) when is_list(Config) -> T1 = [ <<"Q1 = qlc:q([{X} || X <- [1,2]]), {'EXIT', {badarg,_}} = (catch qlc:e(Q1, {tmpdir_usage,bad})), %% merge join F = fun(Use) -> L1 = [{Y,a} || Y <- lists:seq(1, 2)], L2 = [{a,Y} || Y <- lists:seq(1, 10000)], Q = qlc:q([{XX,YY} || {XX,X} <- L1, {Y,YY} <- L2, X == Y], {join,merge}), qlc:e(Q, [{max_list_size,64*1024},{tmpdir_usage,Use}]) end, D = erlang:system_flag(backtrace_depth, 0), try 20000 = length(F(allowed)), ErrReply = F(not_allowed), {error, qlc, {tmpdir_usage,joining}} = ErrReply, \"temporary file was needed for joining\n\" = lists:flatten(qlc:format_error(ErrReply)), qlc_SUITE:install_error_logger(), 20000 = length(F(warning_msg)), {error, joining} = qlc_SUITE:read_error_logger(), 20000 = length(F(info_msg)), {info, joining} = qlc_SUITE:read_error_logger(), 20000 = length(F(error_msg)), {error, joining} = qlc_SUITE:read_error_logger() after _ = erlang:system_flag(backtrace_depth, D) end, qlc_SUITE:uninstall_error_logger()">>], ?line run(Config, T1), T2 = [ <<"%% File sorter. T = lists:seq(1, 10000), Q0 = qlc:q([{X} || X <- [T,T,T], begin X > 0 end], [{cache,list},unique]), Q1 = qlc:q([{X,Y,Z} || X <- Q0, Y <- Q0, Z <- Q0], [{cache,list},unique]), Q = qlc:q([{X, Y} || Y <- [1], X <- Q1]), F = fun(Use) -> qlc:e(Q, [{max_list_size,10000},{tmpdir_usage,Use}]) end, 1 = length(F(allowed)), ErrReply = F(not_allowed), {error, qlc, {tmpdir_usage,caching}} = ErrReply, \"temporary file was needed for caching\n\" = lists:flatten(qlc:format_error(ErrReply)), qlc_SUITE:install_error_logger(), 1 = length(F(error_msg)), {error, caching} = qlc_SUITE:read_error_logger(), {error, caching} = qlc_SUITE:read_error_logger(), 1 = length(F(warning_msg)), {error, caching} = qlc_SUITE:read_error_logger(), {error, caching} = qlc_SUITE:read_error_logger(), 1 = length(F(info_msg)), {info, caching} = qlc_SUITE:read_error_logger(), {info, caching} = qlc_SUITE:read_error_logger(), qlc_SUITE:uninstall_error_logger()">>], ?line run(Config, T2), T3 = [ <<"%% sort/keysort E1 = create_ets(1, 10), E2 = create_ets(5, 50000), Q = qlc:q([{XX,YY} || {X,XX} <- ets:table(E1), {YY,Y} <- ets:table(E2), X == Y], {join,merge}), F = fun(Use) -> qlc:e(Q, {tmpdir_usage,Use}) end, ErrReply = F(not_allowed), {error,qlc,{tmpdir_usage,sorting}} = ErrReply, \"temporary file was needed for sorting\n\" = lists:flatten(qlc:format_error(ErrReply)), qlc_SUITE:install_error_logger(), L = [{5,5},{6,6},{7,7},{8,8},{9,9},{10,10}], L = F(allowed), L = F(error_msg), {error, sorting} = qlc_SUITE:read_error_logger(), L = F(info_msg), {info, sorting} = qlc_SUITE:read_error_logger(), L = F(warning_msg), {error, sorting} = qlc_SUITE:read_error_logger(), qlc_SUITE:uninstall_error_logger(), ets:delete(E1), ets:delete(E2)">>], ?line run(Config, T3), T4 = [ <<"%% cache list etsc(fun(E) -> Q0 = qlc:q([X || X <- ets:table(E), begin element(1, X) > 5 end], {cache,list}), Q = qlc:q([{X, element(1,Y)} || X <- lists:seq(1, 5), Y <- Q0]), R = [{X,Y} || X <- lists:seq(1, 5), Y <- lists:seq(6, 10)], F = fun(Use) -> qlc:e(Q, [{max_list_size, 100*1024}, {tmpdir_usage, Use}]) end, R = lists:sort(F(allowed)), qlc_SUITE:install_error_logger(), R = lists:sort(F(info_msg)), {info, caching} = qlc_SUITE:read_error_logger(), R = lists:sort(F(error_msg)), {error, caching} = qlc_SUITE:read_error_logger(), R = lists:sort(F(warning_msg)), {error, caching} = qlc_SUITE:read_error_logger(), qlc_SUITE:uninstall_error_logger(), ErrReply = F(not_allowed), {error,qlc,{tmpdir_usage,caching}} = ErrReply, \"temporary file was needed for caching\n\" = lists:flatten(qlc:format_error(ErrReply)) end, [{keypos,1}], [{I,a,lists:duplicate(100000,1)} || I <- lists:seq(1, 10)])">>], ?line run(Config, T4), ok. otp_7238(doc) -> "OTP-7238. info-option 'depth', &c."; otp_7238(suite) -> []; otp_7238(Config) when is_list(Config) -> dets:start(), T = otp_7238, Fname = filename(T, Config), ?line ok = compile_gb_table(Config), %% A few more warnings. T1 = [ %% The same error message string, but with different tags %% (the strings are not compared :-( {nomatch_1, <<"nomatch_1() -> {qlc:q([X || X={X} <- []]), [t || \"a\"=\"b\" <- []]}.">>, [], {warnings,[{{2,30},qlc,nomatch_pattern}, {{2,44},v3_core,nomatch}]}}, %% Not found by qlc... {nomatch_2, <<"nomatch_2() -> qlc:q([t || {\"a\"++\"b\"} = {\"ac\"} <- []]).">>, [], {warnings,[{{2,22},v3_core,nomatch}]}}, {nomatch_3, <<"nomatch_3() -> qlc:q([t || [$a, $b] = \"ba\" <- []]).">>, [], {warnings,[{{2,37},qlc,nomatch_pattern}]}}, %% Not found by qlc... {nomatch_4, <<"nomatch_4() -> qlc:q([t || \"a\"++_=\"b\" <- []]).">>, [], {warnings,[{{2,22},v3_core,nomatch}]}}, %% Found neither by the compiler nor by qlc... {nomatch_5, <<"nomatch_5() -> qlc:q([X || X = <<X>> <- [3]]).">>, [], []}, {nomatch_6, <<"nomatch_6() -> qlc:q([X || X <- [], X =:= {X}]).">>, [], {warnings,[{{3,30},qlc,nomatch_filter}]}}, {nomatch_7, <<"nomatch_7() -> qlc:q([X || {X=Y,{Y}=X} <- []]).">>, [], {warnings,[{{2,28},qlc,nomatch_pattern}]}}, {nomatch_8, <<"nomatch_8() -> qlc:q([X || {X={},X=[]} <- []]).">>, [], {warnings,[{{2,28},qlc,nomatch_pattern}]}}, {nomatch_9, <<"nomatch_9() -> qlc:q([X || X <- [], X =:= {}, X =:= []]).">>, [], {warnings,[{{2,49},qlc,nomatch_filter}]}}, {nomatch_10, <<"nomatch_10() -> qlc:q([X || X <- [], ((X =:= 1) or (X =:= 2)) and (X =:= 3)]).">>, [], {warnings,[{{3,53},qlc,nomatch_filter}]}}, {nomatch_11, <<"nomatch_11() -> qlc:q([X || X <- [], x =:= []]).">>, [], {warnings,[{{2,39},qlc,nomatch_filter}]}}, {nomatch_12, <<"nomatch_12() -> qlc:q([X || X={} <- [], X =:= []]).">>, [], {warnings,[{{2,42},qlc,nomatch_filter}]}}, {nomatch_13, <<"nomatch_13() -> qlc:q([Z || Z <- [], X={X} <- [], Y={Y} <- []]).">>, [], {warnings,[{{3,29},qlc,nomatch_pattern}, {{4,29},qlc,nomatch_pattern}]}}, {nomatch_14, <<"nomatch_14() -> qlc:q([X || X={X} <- [], 1 > 0, 1 > X]).">>, [], {warnings,[{{2,29},qlc,nomatch_pattern}]}}, {nomatch_15, <<"nomatch_15() -> qlc:q([{X,Y} || X={X} <- [1], Y <- [1], 1 > 0, 1 > X]).">>, [], {warnings,[{{2,32},qlc,nomatch_pattern}]}}, %% Template warning. {nomatch_template1, <<"nomatch_template1() -> qlc:q([{X} = {} || X <- []]).">>, [], {warnings,[{2,sys_core_fold,no_clause_match}]}} ], ?line [] = compile(Config, T1), %% 'depth' is a new option used by info() T2 = [ %% Firstly: lists <<"L = [[a,b,c],{a,b,c},[],<<\"foobar\">>], Q = qlc:q([{X} || X <- L]), {call, _, {remote,_,{atom,_,ets},{atom,_,match_spec_run}}, [{cons,_,{atom,_,'...'}, {cons,_,{atom,_,'...'}, {cons,_,{nil,_},{cons,_,{atom,_,'...'},{nil,_}}}}}, _]} = qlc:info(Q, [{format,abstract_code},{depth,0}]), {call,_,_, [{cons,_,{cons,_,{atom,_,'...'},{nil,_}}, {cons,_, {tuple,_,[{atom,_,'...'}]}, {cons,_,{nil,_}, {cons,_, {bin,_, [{_,_,{_,_,$.},_,_}, {_,_,{_,_,$.},_,_}, {_,_,{_,_,$.},_,_}]}, {nil,_}}}}}, _]} = qlc:info(Q, [{format,abstract_code},{depth,1}]), {call,_, _, [{cons,_,{cons,_,{atom,_,a},{atom,_,'...'}}, {cons,_, {tuple,_,[{atom,_,a},{atom,_,'...'}]}, {cons,_,{nil,_}, {cons,_, {bin,_, [{_,_,{_,_,$f},_,_}, {_,_,{_,_,$.},_,_}, {_,_,{_,_,$.},_,_}, {_,_,{_,_,$.},_,_}]}, {nil,_}}}}}, _]} = qlc:info(Q, [{format,abstract_code},{depth,2}]), {call,_,_, [{cons,_, {cons,_,{atom,_,a},{cons,_,{atom,_,b},{atom,_,'...'}}}, {cons,_, {tuple,_,[{atom,_,a},{atom,_,b},{atom,_,'...'}]}, {cons,_,{nil,_}, {cons,_, {bin,_, [{_,_,{_,_,$f},_,_}, {_,_,{_,_,$o},_,_},_,_,_]}, {nil,_}}}}}, _]} = qlc:info(Q, [{format,abstract_code},{depth,3}]), {call,_,_, [{cons,_, {cons,_, {atom,_,a},{cons,_,{atom,_,b},{cons,_,{atom,_,c},{nil,_}}}}, {cons,_, {tuple,_,[{atom,_,a},{atom,_,b},{atom,_,c}]}, {cons,_,{nil,_}, {cons,_, {bin,_, [{_,_,{_,_,$f},_,_}, {_,_,{_,_,$o},_,_}, {_,_,{_,_,$o},_,_}, {_,_,{_,_,$b},_,_}, {_,_,{_,_,$a},_,_}, {_,_,{_,_,$r},_,_}]}, {nil,_}}}}}, _]} = qlc:info(Q, [{format,abstract_code},{depth,10}]), {call,_,_, [{cons,_, {cons,_, {atom,_,a},{cons,_,{atom,_,b},{cons,_,{atom,_,c},{nil,_}}}}, {cons,_, {tuple,_,[{atom,_,a},{atom,_,b},{atom,_,c}]}, {cons,_,{nil,_}, {cons,_, {bin,_, [{_,_,{_,_,$f},_,_}, {_,_,{_,_,$o},_,_}, {_,_,{_,_,$o},_,_}, {_,_,{_,_,$b},_,_}, {_,_,{_,_,$a},_,_}, {_,_,{_,_,$r},_,_}]}, {nil,_}}}}}, _]} = qlc:info(Q, [{format,abstract_code},{depth,infinity}])">>, %% Secondly: looked up keys <<"F = fun(D) -> etsc(fun(E) -> Q = qlc:q([C || {N,C} <- ets:table(E), (N =:= {2,2}) or (N =:= {3,3})]), F = qlc:info(Q, [{format,abstract_code},{depth,D}]), {call,_,_,[{call,_,_,[_Fun,Values]},_]} = F, [b,c] = lists:sort(qlc:eval(Q)), Values end, [{{1,1},a},{{2,2},b},{{3,3},c},{{4,4},d}]) end, [{cons,_,{atom,_,'...'},{cons,_,{atom,_,'...'},{nil,_}}}, {cons,_, {tuple,_,[{atom,_,'...'}]}, {cons,_,{tuple,_,[{atom,_,'...'}]},{nil,_}}}, {cons,_, {tuple,_,[{integer,_,2},{atom,_,'...'}]}, {cons,_,{tuple,_,[{integer,_,3},{atom,_,'...'}]},{nil,_}}}, {cons,_, {tuple,_,[{integer,_,2},{integer,_,2}]}, {cons,_,{tuple,_,[{integer,_,3},{integer,_,3}]},{nil,_}}}, {cons,_, {tuple,_,[{integer,_,2},{integer,_,2}]}, {cons,_,{tuple,_,[{integer,_,3},{integer,_,3}]},{nil,_}}}] = lists:map(F, [0,1,2,3,infinity])">>, [<<"T = otp_7238, Fname = \"">>, Fname, <<"\", {ok, _} = dets:open_file(T, [{file,Fname}]), ok = dets:insert(T, [{{1,1},a},{{2,2},b},{{3,3},c},{{4,4},d}]), Q = qlc:q([C || {N,C} <- dets:table(T), (N =:= {2,2}) or (N =:= {3,3})]), F = qlc:info(Q, [{format,abstract_code},{depth,1}]), [b,c] = lists:sort(qlc:eval(Q)), {call,_,_, [{call,_,_, [_, {cons,_, {tuple,_,[{atom,_,'...'}]}, {cons,_,{tuple,_,[{atom,_,'...'}]},{nil,_}}}]}, _]} = F, ok = dets:close(T), file:delete(\"">>, Fname, <<"\")">>], %% Thirdly: format_fun has been extended (in particular: gb_table) <<"T = gb_trees:from_orddict([{{1,a},w},{{2,b},v},{{3,c},u}]), QH = qlc:q([X || {{X,Y},_} <- gb_table:table(T), ((X =:= 1) or (X =:= 2)), ((Y =:= a) or (Y =:= b) or (Y =:= c))]), {call,_,_, [{call,_,_, [{'fun',_, {clauses, [{clause,_,_,[], [{'case',_, {call,_,_, [_, {call,_,_, [{cons,_, {tuple,_,[{atom,_,'...'}]}, {cons,_, {tuple,_,[{atom,_,'...'}]}, {cons,_,{tuple,_,[{atom,_,'...'}]},{nil,_}}}}]}]}, [_,_]}]}]}}, {cons,_, {tuple,_,[{atom,_,'...'}]}, {cons,_, {tuple,_,[{atom,_,'...'}]}, {cons,_, {tuple,_,[{atom,_,'...'}]}, {cons,_, {tuple,_,[{atom,_,'...'}]}, {cons,_, {tuple,_,[{atom,_,'...'}]}, {cons,_,{tuple,_,[{atom,_,'...'}]},{nil,_}}}}}}}]}, {call,_,_, [{cons,_,{tuple,_,[{atom,_,'...'}]},{nil,_}}]}]} = qlc:info(QH, [{format,abstract_code},{depth,1}])">>, <<"T1 = [{1,1,a},{2,2,b},{3,3,c},{4,4,d}], T2 = [{x,1},{y,1},{z,2}], QH1 = T1, T = gb_trees:from_orddict(T2), QH2 = qlc:q([X || {_,X} <- gb_table:table(T)], cache), Q = qlc:q([{X1,X2,X3} || {X1,X2,X3} <- QH1, Y2 <- QH2, X2 =:= Y2]), {block,_, [{match,_,_, {call,_,_, [{lc,_,_, [{generate,_,_, {call,_,_, [{call,_,_, [{cons,_, {tuple,_,[{atom,_,'...'}]}, {atom,_,'...'}}]}]}}]}, _]}}, {call,_,_, [{lc,_,_, [{generate,_,_, {cons,_,{tuple,_,[{atom,_,'...'}]},{atom,_,'...'}}}, _,_]}]}]} = qlc:info(Q, [{format,abstract_code},{depth, 1}, {n_elements,1}])">>, <<"L = [{{key,1},a},{{key,2},b},{{key,3},c}], T = gb_trees:from_orddict(orddict:from_list(L)), Q = qlc:q([K || {K,_} <- gb_table:table(T), (K =:= {key,1}) or (K =:= {key,2})]), {call,_,_, [{call,_,_, [{'fun',_, {clauses, [{clause,_,_,[], [{'case',_, {call,_,_, [_, {call,_,_, [{cons,_, {tuple,_,[{tuple,_,[{atom,_,'...'}]},{atom,_,'...'}]}, {cons,_, {tuple,_,[{tuple,_,[{atom,_,'...'}]},{atom,_,'...'}]}, {cons,_, {tuple,_,[{tuple,_,[{atom,_,'...'}]},{atom,_,'...'}]}, {nil,_}}}}]}]}, _}]}]}}, {cons,_, {tuple,_,[{atom,_,key},{atom,_,'...'}]}, {cons,_,{tuple,_,[{atom,_,key},{atom,_,'...'}]},{nil,_}}}]}, {call,_, {remote,_,{atom,_,ets},{atom,_,match_spec_compile}}, [{cons,_, {tuple,_,[{tuple,_,[{atom,_,'...'}]},{atom,_,'...'}]}, {nil,_}}]}]} = qlc:info(Q, [{format,abstract_code},{depth, 2}])">> ], ?line run(Config, T2), T3 = [ {nomatch_6, <<"nomatch_6() -> qlc:q([X || X <- [], X =:= {X}]).">>, [], {[],["filter evaluates to 'false'"]}}, {nomatch_7, <<"nomatch_7() -> qlc:q([X || {X=Y,{Y}=X} <- []]).">>, [], {[],["pattern cannot possibly match"]}}], ?line compile_format(Config, T3), %% *Very* simple test - just check that it doesn't crash. Type = [{cres, <<"Q = qlc:q([X || {X} <- []]), {'EXIT',{{badfun,_},_}} = (catch qlc:e(Q))">>, [type_checker], []}], ?line run(Config, Type), ok. otp_7114(doc) -> "OTP-7114. Match spec, table and duplicated objects.."; otp_7114(suite) -> []; otp_7114(Config) when is_list(Config) -> Ts = [<<"T = ets:new(t, [bag]), [ets:insert(T, {t, I, I div 2}) || I <- lists:seq(1,10)], Q1 = qlc:q([element(3, E) || E <- ets:table(T)]), [0,1,1,2,2,3,3,4,4,5] = lists:sort(qlc:e(Q1)), [0,1,2,3,4,5] = qlc:e(Q1, unique_all), [0,1,2,3,4,5] = qlc:e(qlc:sort(Q1), unique_all), [0,1,2,3,4,5] = qlc:e(qlc:sort(qlc:e(Q1)), unique_all), ets:delete(T), ok">>], ?line run(Config, Ts). otp_7232(doc) -> "OTP-7232. qlc:info() bug (pids, ports, refs, funs)."; otp_7232(suite) -> []; otp_7232(Config) when is_list(Config) -> Ts = [<<"L = [fun math:sqrt/1, list_to_pid(\"<0.4.1>\"), erlang:make_ref()], \"[fun math:sqrt/1,<0.4.1>,#Ref<\" ++ _ = qlc:info(L), {call,_, {remote,_,{atom,_,qlc},{atom,_,sort}}, [{cons,_, {'fun',_,{function,{atom,_,math},{atom,_,sqrt},_}}, {cons,_, {string,_,\"<0.4.1>\"}, % could use list_to_pid.. {cons,_,{string,_,\"#Ref<\"++_},{nil,_}}}}, {nil,_}]} = qlc:info(qlc:sort(L),{format,abstract_code})">>, <<"Q1 = qlc:q([X || X <- [55296,56296]]), Q = qlc:sort(Q1, {order, fun(A,B)-> A>B end}), \"qlc:sort([55296,56296],[{order,fun'-function/0-fun-2-'/2}])\" = format_info(Q, true), AC = qlc:info(Q, {format, abstract_code}), \"qlc:sort([55296,56296], [{order,fun '-function/0-fun-2-'/2}])\" = binary_to_list(iolist_to_binary(erl_pp:expr(AC)))">>, %% OTP-7234. erl_parse:abstract() handles bit strings <<"Q = qlc:sort([<<17:9>>]), \"[<<8,1:1>>]\" = qlc:info(Q)">> ], ?line run(Config, Ts). otp_7552(doc) -> "OTP-7552. Merge join bug."; otp_7552(suite) -> []; otp_7552(Config) when is_list(Config) -> %% The poor performance cannot be observed unless the %% (redundant) join filter is skipped. Ts = [<<"Few = lists:seq(1, 2), Many = lists:seq(1, 10), S = [d,e], L1 = [{Y,a} || Y <- Few] ++ [{'1b',b},{2,b}] ++ [{Y,X} || X <- S, Y <- Few], L2 = [{a,Y} || Y <- Many] ++ [{b,'1b'}] ++ [{c,1}] ++ [{X,Y} || X <- S, Y <- Many], F = fun(J) -> qlc:q([{XX,YY} || {XX,X} <- L1, {Y,YY} <- L2, X == Y], {join,J}) end, Qm = F(merge), Qn = F(nested_loop), true = lists:sort(qlc:e(Qm, {max_list_size,20})) =:= lists:sort(qlc:e(Qn))">>], ?line run(Config, Ts). otp_7714(doc) -> "OTP-7714. Merge join bug."; otp_7714(suite) -> []; otp_7714(Config) when is_list(Config) -> %% The original example uses Mnesia. This one does not. Ts = [<<"E1 = ets:new(set,[]), true = ets:insert(E1, {a,1}), E2 = ets:new(set,[]), _ = [true = ets:insert(E2, {I, 1}) || I <- lists:seq(1, 3)], Q = qlc:q([{A,B} || {A,I1} <- ets:table(E1), {B,I2} <- ets:table(E2), I1 =:= I2],{join,merge}), [{a,1},{a,2},{a,3}] = lists:sort(qlc:e(Q)), ets:delete(E1), ets:delete(E2)">>], ?line run(Config, Ts). otp_11758(doc) -> "OTP-11758. Bug."; otp_11758(suite) -> []; otp_11758(Config) when is_list(Config) -> Ts = [<<"T = ets:new(r, [{keypos, 2}]), L = [{rrr, xxx, aaa}, {rrr, yyy, bbb}], true = ets:insert(T, L), QH = qlc:q([{rrr, B, C} || {rrr, B, C} <- ets:table(T), (B =:= xxx) or (B =:= yyy) and (C =:= aaa)]), [{rrr,xxx,aaa}] = qlc:e(QH), ets:delete(T)">>], run(Config, Ts). otp_6674(doc) -> "OTP-6674. match/comparison."; otp_6674(suite) -> []; otp_6674(Config) when is_list(Config) -> ?line ok = compile_gb_table(Config), Ts = [%% lookup join <<"E = ets:new(join, [ordered_set]), true = ets:insert(E, [{1,a},{2,b},{3,c}]), Q = qlc:q([{X, Y} || {X,_} <- ets:table(E), {Y} <- [{0},{1},{2}], X == Y]), {0,1,0,0} = join_info(Q), [{1,1},{2,2}] = qlc:e(Q), ets:delete(E)">>, <<"E = ets:new(join, [ordered_set]), true = ets:insert(E, [{1,a},{2,b},{3,c}]), Q = qlc:q([{X, Y} || {X,_} <- ets:table(E), {Y} <- [{0},{1},{2}], X =:= Y]), {0,1,0,0} = join_info(Q), {block,_, [_, {match,_,_, {call,_,_, [{lc,_,_, [_,_,{op,_,'==',_,_}]}, {cons,_, {tuple,_,[{atom,_,join},{atom,_,lookup}]},_}]}}, _]} = qlc:info(Q, {format, abstract_code}), [{1,1},{2,2}] = qlc:e(Q), ets:delete(E)">>, <<"E = ets:new(join, [set]), Q = qlc:q([{X, Y} || {X,_} <- ets:table(E), {Y} <- [{0},{1},{2}], X == Y], {join, lookup}), {'EXIT',{cannot_carry_out_join,_}} = (catch qlc:e(Q)), ets:delete(E)">>, %% Lookup join possible in both directions. <<"E1 = ets:new(join, [ordered_set]), E2 = ets:new(join, [set]), true = ets:insert(E1, [{1.0,a},{2,b},{3,c}]), true = ets:insert(E2, [{0},{1},{2}]), Q = qlc:q([{X, Y} || {X,_} <- ets:table(E1), {Y} <- ets:table(E2), X == Y],{join,lookup}), % skipped {qlc,_, [{generate,_, {qlc,_, [{generate,_, {qlc,_,[{generate,_,{table,{ets,table,[_]}}}],[]}}, {generate,_,{table,{ets,table,[_]}}}, _], [{join,lookup}]}}], []} = qlc:info(Q, {format,debug}), {0,1,0,0} = join_info(Q), [{1.0,1},{2,2}] = lists:sort(qlc:e(Q)), ets:delete(E1), ets:delete(E2)">>, <<"E1 = ets:new(join, [ordered_set]), E2 = ets:new(join, [set]), true = ets:insert(E1, [{1.0,a},{2,b},{3,c}]), true = ets:insert(E2, [{0},{1},{2}]), Q = qlc:q([{X, Y} || {X,_} <- ets:table(E1), {Y} <- ets:table(E2), X =:= Y],{join,merge}), % not skipped {1,0,0,1} = join_info(Q), [{2,2}] = qlc:e(Q), ets:delete(E1), ets:delete(E2)">>, <<"E1 = ets:new(join, [ordered_set]), E2 = ets:new(join, [set]), true = ets:insert(E1, [{1.0,a},{2,b},{3,c}]), true = ets:insert(E2, [{0},{1},{2}]), Q = qlc:q([{X, Y} || {X,_} <- ets:table(E1), {Y} <- ets:table(E2), X =:= Y],{join,lookup}), % skipped {qlc,_, [{generate,_, {qlc,_, [{generate,_, {qlc,_, [{generate,_,{table,{ets,table,[_]}}}], []}}, {generate,_,{table,{ets,table,[_]}}}, _], [{join,lookup}]}}], []} = qlc:info(Q, {format,debug}), {0,1,0,0} = join_info(Q), [{2,2}] = qlc:e(Q), ets:delete(E1), ets:delete(E2)">>, <<"E1 = ets:new(join, [ordered_set]), E2 = ets:new(join, [set]), true = ets:insert(E1, [{1.0,a},{2,b},{3,c}]), true = ets:insert(E2, [{0},{1},{2}]), Q = qlc:q([{X, Y} || {X,_} <- ets:table(E1), {Y} <- ets:table(E2), %% Independent of term comparison: X =:= Y, X == Y]), {0,1,0,0} = join_info(Q), [{2,2}] = qlc:e(Q), ets:delete(E1), ets:delete(E2)">>, <<"E = ets:new(join, [ordered_set]), true = ets:insert(E, [{1,1},{2,2},{3,c}]), Q = qlc:q([{X, Y} || {X,Z} <- ets:table(E), {Y} <- [{0},{1},{2}], X == Z, Y == Z]), % cannot skip (yet) {qlc,_, [{generate,_, {qlc,_,[_,_,_],[{join,lookup}]}}, _,_],[]} = qlc:info(Q,{format,debug}), {0,1,0,0} = join_info(Q), [{1,1},{2,2}] = qlc:e(Q), ets:delete(E)">>, %% The following moved here from skip_filters. It was buggy! <<"etsc(fun(E) -> A = 3, Q = qlc:q([X || X <- ets:table(E), A == element(1,X)]), {table, _} = i(Q), case qlc:e(Q) of [{3},{3.0}] -> ok; [{3.0},{3}] -> ok end, false = lookup_keys(Q) end, [{3},{3.0},{c}])">>, <<"H1 = qlc:sort([{{192,192.0},1,a},{{192.0,192.0},2,b},{{192,192.0},3,c}]), Q = qlc:q([{X, Y} || {{A,B},X,_} <- H1, % does not need keysort(3) A == 192, B =:= 192.0, {Y} <- [{0},{1},{2}], X == Y]), {block,0, [{match,_,_, {call,_,_, [{lc,_,_, [_, %% Has to compare extra constant: {op,_,'==', {tuple,_,[{integer,_,192},{float,_,192.0}]}, {call,_,{atom,_,element},[{integer,_,1},{var,_,'P0'}]}}]}]}}, _,_, {call,_,_, [{lc,_,_, [_, %% The join filter has been skipped. {op,_,'==',{var,_,'A'},{integer,_,192}}, {op,_,'=:=',{var,_,'B'},{float,_,192.0}}]}]}]} = qlc:info(Q, {format,abstract_code}), {1,0,0,1} = join_info(Q), [{1,1},{2,2}] = qlc:e(Q)">>, %% Does not handle more than one lookup value (conjunctive). <<"T = gb_trees:from_orddict([{1,a},{2,b}]), H = qlc:q([X || {X,_} <- gb_table:table(T), X =:= 1 andalso X == 1.0]), false = lookup_keys(H), [1] = qlc:e(H)">>, %% EqualConstants... <<"etsc(fun(E) -> Q = qlc:q([{X,Y} || {X} <- ets:table(E), {Y} <- [{{1}},{{2}},{{1.0}},{{2.0}}], X =:= {1}, X == {1.0}, X == Y], {join, merge}), [{{1},{1}},{{1},{1.0}}] = lists:sort(qlc:e(Q)), false = lookup_keys(Q) end, [{{1}}, {{2}}])">>, <<"T = gb_trees:from_orddict([{foo,{1}}, {bar,{2}}]), Q = qlc:q([{X,Y} || {_,X} <- gb_table:table(T), {Y} <- [{{1}},{{2}},{{1.0}},{{2.0}}], (X =:= {1}) or (X == {2}), (X == {1.0}) or (X =:= {2.0}), X == Y], {join, merge}), [{{1},{1}},{{1},{1.0}}] = qlc:e(Q)">>, %% Compare key <<"T = gb_trees:from_orddict([{1,a},{2,b}]), H = qlc:q([X || {X,_} <- gb_table:table(T), X == 1]), [1] = lookup_keys(H), [1] = qlc:e(H)">>, <<"T = gb_trees:from_orddict([{1,a},{2,b}]), H = qlc:q([X || {X,_} <- gb_table:table(T), X == 1.0]), [1.0] = lookup_keys(H), % this is how gb_table works... [1.0] = qlc:e(H)">>, <<"etsc(fun(E) -> H = qlc:q([X || {X,_} <- ets:table(E), X == 1.0]), [1] = qlc:e(H), % and this is how ETS works. [1.0] = lookup_keys(H) end, [ordered_set], [{1,a},{2,b}])">>, <<"T = gb_trees:from_orddict([{1,a},{2,b}]), H = qlc:q([X || {X,_} <- gb_table:table(T), X =:= 2]), [2] = lookup_keys(H), %% Cannot (generally) remove the matching filter (the table %% compares the key). But note that gb_table returns the given %% term as key, so in this case the filter _could_ have been removed. %% However, there is no callback to inform qlc about that. {call,_,_, [_,{call,_,_, [{cons,_,{tuple,_, [_,{cons,_, {tuple,_,[{atom,_,'=:='},{atom,_,'$1'},{integer,_,2}]}, _},_]},_}]}]} = qlc:info(H, {format,abstract_code}), [2] = qlc:e(H)">>, <<"T = gb_trees:from_orddict([{1,a},{2,b}]), H = qlc:q([X || {X,_} <- gb_table:table(T), X =:= 2.0]), %% Just shows that the term (not the key) is returned. [2.0] = lookup_keys(H), [2.0] = qlc:e(H)">>, <<"I = 1, T = gb_trees:from_orddict([{1,a},{2,b}]), H = qlc:q([X || {X,_} <- gb_table:table(T), X == I]), % imported variable [1] = lookup_keys(H), {call,_,_, [_,{call,_,_, [{cons,_, {tuple,_, [{tuple,_,[{atom,_,'$1'},{atom,_,'_'}]}, {nil,_}, % the filter has been skipped {cons,_,{atom,_,'$1'},_}]}, _}]}]} = qlc:info(H, {format, abstract_code}), [1] = qlc:e(H)">>, <<"I = 2, T = gb_trees:from_orddict([{1,a},{2,b}]), H = qlc:q([X || {X,_} <- gb_table:table(T), X =:= I]), [2] = lookup_keys(H), {call,_,_, [_,{call,_,_, [{cons,_,{tuple,_, [_,{cons,_, {tuple,_, [{atom,_,'=:='}, {atom,_,'$1'}, {tuple,_,[{atom,_,const},{integer,_,2}]}]}, _},_]}, _}]}]} = qlc:info(H, {format, abstract_code}), [2] = qlc:e(H)">>, <<"etsc(fun(E) -> Q = qlc:q([X || {X,_} <- ets:table(E), X =:= a]), % skipped [a] = qlc:e(Q), {list,{table,_},_} = i(Q), [a] = lookup_keys(Q) end, [ordered_set], [{a,1},{b,2},{3,c}])">>, %% Does not find that if for instance X =:= {1} then the filter %% X == {1} can be removed. <<"etsc(fun(E) -> Q = qlc:q([X || {X} <- ets:table(E), X =:= {1}, X == {1.0}]), [{1}] = qlc:e(Q), [{1}] = lookup_keys(Q) end, [{{1}}, {{2}}])">>, <<"etsc(fun(E) -> Q = qlc:q([X || {X} <- ets:table(E), X =:= {1}, X == {1.0}]), [{1}] = qlc:e(Q), false = lookup_keys(Q) end, [ordered_set], [{{1}}, {{2}}])">>, <<"etsc(fun(E) -> Q = qlc:q([X || {X} <- ets:table(E), X == {1.0}, X =:= {1}]), [{1}] = qlc:e(Q), [{1}] = lookup_keys(Q) end, [{{1}}, {{2}}])">>, <<"etsc(fun(E) -> Q = qlc:q([X || {X} <- ets:table(E), X == {1.0}, X =:= {1}]), [{1}] = qlc:e(Q), false = lookup_keys(Q) end, [ordered_set], [{{1}}, {{2}}])">>, <<"E = ets:new(apa, []), true = ets:insert(E, [{1,a},{2,b}]), {'EXIT', {badarg, _}} = (catch qlc_SUITE:bad_table_key_equality(E)), ets:delete(E)">>, <<"etsc(fun(E) -> Q = qlc:q([X || {X} <- ets:table(E), X =:= 1, X =:= is_integer(X)]), [] = qlc:e(Q), [1] = lookup_keys(Q) end, [{1}, {2}])">>, <<"etsc(fun(E) -> Q = qlc:q([X || {X=1} <- ets:table(E), X =:= is_integer(X)]), {call,_,_, [{lc,_,_, [_, {op,_,'=:=', {var,_,'X'}, {call,_, {atom,_,is_integer}, [{var,_,'X'}]}}]}]} = qlc:info(Q, {format, abstract_code}), [] = qlc:e(Q), [1] = lookup_keys(Q) end, [{1}, {2}])">>, <<"T = gb_trees:from_orddict([{1,a},{2,b}]), H = qlc:q([X || {X,Y} <- gb_table:table(T), Y =:= a, true, X =:= 1]), [1] = lookup_keys(H), [1] = qlc:e(H)">>, <<"T = gb_trees:from_orddict([{{1.0,1},a},{{2.0,2},b}]), H = qlc:q([X || {{1.0,B}=X,_} <- gb_table:table(T), B == 1]), % skipped [{1.0, 1}] = qlc:e(H), {qlc,_,[{generate,_,{table,_}}], []} = qlc:info(H, {format,debug})">>, <<"T = gb_trees:from_orddict([{{1.0,1},a},{{2.0,2},b}]), H = qlc:q([X || {{1.0,B}=X,_} <- gb_table:table(T), B == 1.0]), % skipped [{1.0, 1.0}] = qlc:e(H), % this is how gb_table works... {qlc,_,[{generate,_,{table,_}}], []} = qlc:info(H, {format,debug})">>, <<"T = gb_trees:from_orddict([{{1.0,1},a},{{2.0,2},b}]), H = qlc:q([X || {{1.0,B}=X,_} <- gb_table:table(T), B =:= 1.0]), % not skipped [{1.0, 1.0}] = qlc:e(H), {qlc,_,[{generate,_,{table,_}},_], []} = qlc:info(H,{format,debug})">>, <<"T = gb_trees:from_orddict([{{1.0,1},a},{{2.0,2},b}]), H = qlc:q([X || {{1.0,B}=X,_} <- gb_table:table(T), B =:= 1]), % not skipped [{1.0, 1}] = qlc:e(H), {qlc,_,[{generate,_,{table,_}},_], []} = qlc:info(H,{format,debug})">>, <<"%% The imported variables do not interfere with join. E = ets:new(join, [ordered_set]), {A, B} = {1,1}, true = ets:insert(E, [{1,a},{2,b},{3,c}]), Q = qlc:q([{X, Y} || {X,_Z} <- ets:table(E), {Y} <- [{0},{1},{2}], X =:= A, Y =:= B, Y == X], % skipped {join, merge}), [{1,1}] = qlc:e(Q), {qlc,_, [{generate,_, {qlc,_, [{generate,_, {qlc,_,[{generate,_,{list,{table,_},_}},_],[]}}, {generate,_, {qlc,_,[{generate,_,{list,_,_}},_],[]}}, _], [{join,merge}]}}], []} = qlc:info(Q, {format, debug}), ets:delete(E)">>, <<"% An old bug: usort() should not be used when matching values etsc(fun(E) -> I = 1, H = qlc:q([X || {X,_} <- ets:table(E), X =:= 1.0 orelse X =:= I]), [1] = qlc:e(H), [1.0] = lookup_keys(H) % do not look up twice end, [set], [{1,a},{2,b}])">>, <<"etsc(fun(E) -> H = qlc:q([X || {X,_} <- ets:table(E), X =:= 1.0 orelse X == 1]), [1] = qlc:e(H), false = lookup_keys(H) % doesn't handle this case end, [ordered_set], [{1,a},{2,b}])">>, <<"etsc(fun(E) -> I1 = 1, I2 = 1, H = qlc:q([X || {X,_} <- ets:table(E), X =:= I1 orelse X == I2]), [1] = qlc:e(H), % do not look up twice [1] = lookup_keys(H) end, [ordered_set], [{1,a},{2,b}])">>, <<"etsc(fun(E) -> I1 = 1, I2 = 1, I3 = 1, H = qlc:q([X || {X,_} <- ets:table(E), I1 == I2, I1 =:= I3, I3 == I2, I2 =:= I3, X =:= I1 orelse X == I2 ]), [1] = qlc:e(H), [1] = lookup_keys(H) end, [ordered_set], [{1,a},{2,b}])">>, <<"E = ets:new(join, [ordered_set]), true = ets:insert(E, [{1,a},{2,b,x},{3,c}]), Q = qlc:q([P || P <- ets:table(E), P =:= {1,a} orelse P =:= {2,b,x}]), [{1,a},{2,b,x}] = qlc:e(Q), ets:delete(E)">>, <<"etsc(fun(E) -> Q = qlc:q([X || {X,Y} <- ets:table(E), ((X =:= 3) or (Y =:= 4)) and (X == a)]), {list,{table,_},_} = i(Q), [] = qlc:e(Q), % a is not an answer [a] = lookup_keys(Q) end, [{keypos,1},ordered_set], [{a,3},{b,4}])">>, <<"Q = qlc:q([{X,Y} || {X} <- [{<<3:4>>}], {Y} <- [{<<3:4>>}], X =:= <<1:3,1:1>>, % <<3:4>> Y =:= <<0:2,1:1,1:1>>, % <<3:4>> X =:= Y]), [{<<3:4>>,<<3:4>>}] = qlc:e(Q)">> ], ?line run(Config, Ts). manpage(doc) -> "Examples from qlc(3)."; manpage(suite) -> []; manpage(Config) when is_list(Config) -> ?line ok = compile_gb_table(Config), Ts = [ <<"QH = qlc:q([{X,Y} || X <- [a,b], Y <- [1,2]]), QC = qlc:cursor(QH), [{a,1}] = qlc:next_answers(QC, 1), [{a,2}] = qlc:next_answers(QC, 1), [{b,1},{b,2}] = qlc:next_answers(QC, all_remaining), ok = qlc:delete_cursor(QC)">>, <<"QH = qlc:q([{X,Y} || X <- [a,b], Y <- [1,2]]), [{a,1},{a,2},{b,1},{b,2}] = qlc:eval(QH)">>, <<"QH = [1,2,3,4,5,6], 21 = qlc:fold(fun(X, Sum) -> X + Sum end, 0, QH)">>, <<"QH = qlc:q([{X,Y} || X <- [x,y], Y <- [a,b]]), B = \"begin\n\" \" V1 =\n\" \" qlc:q([ \n\" \" SQV ||\n\" \" SQV <- [x,y]\n\" \" ],\n\" \" [{unique,true}]),\n\" \" V2 =\n\" \" qlc:q([ \n\" \" SQV ||\n\" \" SQV <- [a,b]\n\" \" ],\n\" \" [{unique,true}]),\n\" \" qlc:q([ \n\" \" {X,Y} ||\n\" \" X <- V1,\n\" \" Y <- V2\n\" \" ],\n\" \" [{unique,true}])\n\" \"end\", true = B =:= qlc:info(QH, unique_all)">>, <<"E1 = ets:new(e1, []), E2 = ets:new(e2, []), true = ets:insert(E1, [{1,a},{2,b}]), true = ets:insert(E2, [{a,1},{b,2}]), Q = qlc:q([{X,Z,W} || {X, Z} <- ets:table(E1), {W, Y} <- ets:table(E2), X =:= Y]), L = \"begin\n\" \" V1 =\n\" \" qlc:q([ \n\" \" P0 ||\n\" \" P0 = {W,Y} <- ets:table(_)\n\" \" ]),\n\" \" V2 =\n\" \" qlc:q([ \n\" \" [G1|G2] ||\n\" \" G2 <- V1,\n\" \" G1 <- ets:table(_),\n\" \" element(2, G1) =:= element(1, G2)\n\" \" ],\n\" \" [{join,lookup}]),\n\" \" qlc:q([ \n\" \" {X,Z,W} ||\n\" \" [{X,Z}|{W,Y}] <- V2\n\" \" ])\n\" \"end\", Info = re:replace(qlc:info(Q), \"table\\\\(-*[0-9]*\", \"table(_\", [{return,list},global]), L = Info, ets:delete(E1), ets:delete(E2)">>, <<"Q = qlc:q([{A,X,Z,W} || A <- [a,b,c], {X,Z} <- [{a,1},{b,4},{c,6}], {W,Y} <- [{2,a},{3,b},{4,c}], X =:= Y], {cache, list}), L = \"begin\n\" \" V1 =\n\" \" qlc:q([ \n\" \" P0 ||\n\" \" P0 = {X,Z} <- qlc:keysort(1, [{a,1},{b,4},{c,6}], [])\n\" \" ]),\n\" \" V2 =\n\" \" qlc:q([ \n\" \" P0 ||\n\" \" P0 = {W,Y} <- qlc:keysort(2, [{2,a},{3,b},{4,c}], [])\n\" \" ]),\n\" \" V3 =\n\" \" qlc:q([ \n\" \" [G1|G2] ||\n\" \" G1 <- V1,\n\" \" G2 <- V2,\n\" \" element(1, G1) == element(2, G2)\n\" \" ],\n\" \" [{join,merge},{cache,list}]),\n\" \" qlc:q([ \n\" \" {A,X,Z,W} ||\n\" \" A <- [a,b,c],\n\" \" [{X,Z}|{W,Y}] <- V3,\n\" \" X =:= Y\n\" \" ])\n\" \"end\", L = qlc:info(Q)">>, <<"E1 = ets:new(t, [set]), % uses =:=/2 Q1 = qlc:q([K || {K} <- ets:table(E1), K == 2.71 orelse K == a]), {list,{table,_}, [{{'$1'},[],['$1']}]} = i(Q1), true = ets:delete(E1)">>, <<"F = fun(E, I) -> qlc:q([V || {K,V} <- ets:table(E), K == I]) end, E2 = ets:new(t, [set]), true = ets:insert(E2, [{{2,2},a},{{2,2.0},b},{{2.0,2},c}]), Q2 = F(E2, {2,2}), {table,{ets,table,[_, [{traverse,{select,[{{'$1','$2'}, [{'==','$1',{const,{2,2}}}], ['$2']}]}}]]}} = i(Q2), [a,b,c] = lists:sort(qlc:e(Q2)), true = ets:delete(E2), E3 = ets:new(t, [ordered_set]), % uses ==/2 true = ets:insert(E3, [{{2,2.0},b}]), Q3 = F(E3,{2,2}), {list,{table,_},[{{'$1','$2'},[],['$2']}]} = i(Q3), [b] = qlc:e(Q3), true = ets:delete(E3)">>, <<"T = gb_trees:empty(), QH = qlc:q([X || {{X,Y},_} <- gb_table:table(T), ((X == 1) or (X == 2)) andalso ((Y == a) or (Y == b) or (Y == c))]), L = \"ets:match_spec_run(lists:flatmap(fun(K) -> case gb_trees:lookup(K, gb_trees:from_orddict([])) of {value,V} -> [{K,V}]; none -> [] end end, [{1,a},{1,b},{1,c},{2,a},{2,b},{2,c}]), ets:match_spec_compile([{{{'$1','$2'},'_'},[],['$1']}]))\", L = qlc:info(QH)">> ], ?line run(Config, Ts), L = [1,2,3], Bs = erl_eval:add_binding('L', L, erl_eval:new_bindings()), QH = qlc:string_to_handle("[X+1 || X <- L].", [], Bs), [2,3,4] = qlc:eval(QH), %% ets(3) MS = ets:fun2ms(fun({X,Y}) when (X > 1) or (X < 5) -> {Y} end), ETs = [ [<<"true = ets:insert(Tab = ets:new(t, []),[{1,a},{2,b},{3,c},{4,d}]), MS = ">>, io_lib:format("~w", [MS]), <<", QH1 = ets:table(Tab, [{traverse, {select, MS}}]), QH2 = qlc:q([{Y} || {X,Y} <- ets:table(Tab), (X > 1) or (X < 5)]), true = qlc:info(QH1) =:= qlc:info(QH2), true = ets:delete(Tab)">>]], ?line run(Config, ETs), %% dets(3) DTs = [ [<<"{ok, T} = dets:open_file(t, []), ok = dets:insert(T, [{1,a},{2,b},{3,c},{4,d}]), MS = ">>, io_lib:format("~w", [MS]), <<", QH1 = dets:table(T, [{traverse, {select, MS}}]), QH2 = qlc:q([{Y} || {X,Y} <- dets:table(t), (X > 1) or (X < 5)]), true = qlc:info(QH1) =:= qlc:info(QH2), ok = dets:close(T)">>]], ?line run(Config, DTs), ok. compile_gb_table(Config) -> GB_table_file = filename("gb_table.erl", Config), ?line ok = file:write_file(GB_table_file, gb_table()), ?line {ok, gb_table} = compile:file(GB_table_file, [{outdir,?privdir}]), ?line code:purge(gb_table), ?line {module, gb_table} = code:load_abs(filename:rootname(GB_table_file)), ok. gb_table() -> <<" -module(gb_table). -export([table/1]). table(T) -> TF = fun() -> qlc_next(gb_trees:next(gb_trees:iterator(T))) end, InfoFun = fun(num_of_objects) -> gb_trees:size(T); (keypos) -> 1; (is_sorted_key) -> true; (is_unique_objects) -> true; (_) -> undefined end, LookupFun = fun(1, Ks) -> lists:flatmap(fun(K) -> case gb_trees:lookup(K, T) of {value, V} -> [{K,V}]; none -> [] end end, Ks) end, FormatFun = fun({all, NElements, ElementFun}) -> ValsS = io_lib:format(\"gb_trees:from_orddict(~w)\", [gb_nodes(T, NElements, ElementFun)]), io_lib:format(\"gb_table:table(~s)\", [ValsS]); ({lookup, 1, KeyValues, _NElements, ElementFun}) -> ValsS = io_lib:format(\"gb_trees:from_orddict(~w)\", [gb_nodes(T, infinity, ElementFun)]), io_lib:format(\"lists:flatmap(fun(K) -> \" \"case gb_trees:lookup(K, ~s) of \" \"{value, V} -> [{K,V}];none -> [] end \" \"end, ~w)\", [ValsS, [ElementFun(KV) || KV <- KeyValues]]) end, qlc:table(TF, [{info_fun, InfoFun}, {format_fun, FormatFun}, {lookup_fun, LookupFun},{key_equality,'=='}]). qlc_next({X, V, S}) -> [{X,V} | fun() -> qlc_next(gb_trees:next(S)) end]; qlc_next(none) -> []. gb_nodes(T, infinity, ElementFun) -> gb_nodes(T, -1, ElementFun); gb_nodes(T, NElements, ElementFun) -> gb_iter(gb_trees:iterator(T), NElements, ElementFun). gb_iter(_I, 0, _EFun) -> '...'; gb_iter(I0, N, EFun) -> case gb_trees:next(I0) of {X, V, I} -> [EFun({X,V}) | gb_iter(I, N-1, EFun)]; none -> [] end. ">>. backward(doc) -> "OTP-6674. Join info and extra constants."; backward(suite) -> []; backward(Config) when is_list(Config) -> try_old_join_info(Config), ok. try_old_join_info(Config) -> %% Check join info for handlers of extra constants. File = filename:join(?datadir, "join_info_compat.erl"), M = join_info_compat, {ok, M} = compile:file(File, [{outdir, ?datadir}]), {module, M} = code:load_abs(filename:rootname(File)), H = M:create_handle(), {block,0, [{match,_,_, {call,_,_, [{lc,_,_, [_, {op,_,'=:=', {float,_,192.0}, {call,_,{atom,_,element},[{integer,_,1},_]}}]}]}}, _,_, {call,_,_, [{lc,_,_, [_, {op,_,'=:=',{var,_,'B'},{float,_,192.0}}, {op,_,'==',{var,_,'X'},{var,_,'Y'}}]}]}]} = qlc:info(H,{format,abstract_code}), [{1,1},{2,2}] = qlc:e(H), H2 = M:lookup_handle(), {qlc,_,[{generate,_,{qlc,_,_,[{join,lookup}]}},_],[]} = qlc:info(H2, {format,debug}), [{1,1},{2,2}] = qlc:e(H2). forward(doc) -> ""; forward(suite) -> []; forward(Config) when is_list(Config) -> Ts = [ %% LC_fun() returns something unknown. <<"FakeH = {qlc_handle,{qlc_lc,fun() -> {foo,bar} end, {qlc_opt,false,false,-1,any,[],any,524288}}}, {'EXIT', {{unsupported_qlc_handle,_},_}} = (catch qlc:e(FakeH))">>, %% 'f1' should be used for new stuff that does not interfer with old behavior % %% The unused element 'f1' of #qlc_table seems to be used. % <<"DF = fun() -> foo end, % FakeH = {qlc_handle,{qlc_table,DF, % true,DF,DF,DF,DF,DF, % undefined,not_undefined,undefined,no_match_spec}}, % {'EXIT', {{unsupported_qlc_handle,_},_}} = (catch qlc:e(FakeH))">>, %% #qlc_opt has changed. <<"H = qlc:q([X || X <- []]), {qlc_handle, {qlc_lc, Fun, _Opt}} = H, FakeH = {qlc_handle, {qlc_lc, Fun, {new_qlc_opt, a,b,c}}}, {'EXIT', {{unsupported_qlc_handle,_},_}} = (catch qlc:e(FakeH))">> ], ?line run(Config, Ts), ok. eep37(Config) when is_list(Config) -> Ts = [ <<"H = (fun _Handle() -> qlc:q([X || X <- []]) end)(), [] = qlc:eval(H)">> ], run(Config, Ts), ok. %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% bad_table_throw(Tab) -> Limit = 1, Select = fun(MS) -> cb(ets:select(Tab, MS, Limit)) end, PreFun = fun(_) -> throw({throw,bad_pre_fun}) end, PostFun = fun() -> throw({throw,bad_post_fun}) end, InfoFun = fun(Tag) -> info(Tab, Tag) end, qlc:table(Select, [{pre_fun,PreFun}, {post_fun, PostFun}, {info_fun, InfoFun}]). bad_table_exit(Tab) -> Limit = 1, Select = fun(MS) -> cb(ets:select(Tab, MS, Limit)) end, PreFun = fun(_) -> erlang:error(bad_pre_fun) end, PostFun = fun() -> erlang:error(bad_post_fun) end, InfoFun = fun(Tag) -> info(Tab, Tag) end, qlc:table(Select, [{pre_fun,PreFun}, {post_fun, PostFun}, {info_fun, InfoFun}]). info(_Tab, is_unique_objects) -> false; info(Tab, Tag) -> try ets:info(Tab, Tag) catch _:_ -> undefined end. create_ets(S, E) -> create_ets(lists:seq(S, E)). create_ets(L) -> E1 = ets:new(e, []), true = ets:insert(E1, [{X,X} || X <- L]), E1. etsc(F, Objs) -> etsc(F, [{keypos,1}], Objs). etsc(F, Opts, Objs) -> E = ets:new(test, Opts), true = ets:insert(E, Objs), V = F(E), ets:delete(E), V. join_info(H) -> {qlc, S, Options} = strip_qlc_call(H), %% "Hide" the call to qlc_pt from the test in run_test(). LoadedPT = code:is_loaded(qlc_pt), QH = qlc:string_to_handle(S, Options), _ = [unload_pt() || false <- [LoadedPT]], % doesn't take long... case {join_info_count(H), join_info_count(QH)} of {N, N} -> N; Ns -> Ns end. strip_qlc_call(H) -> S = qlc:info(H, {flat, false}), {ok, Tokens, _EndLine} = erl_scan:string(S++"."), {ok, [Expr]} = erl_parse:parse_exprs(Tokens), case Expr of {call,_,{remote,_,{atom,_,qlc},{atom,_,q}},[LC]} -> {qlc, lists:flatten([erl_pp:expr(LC), "."]), []}; {call,_,{remote,_,{atom,_,qlc},{atom,_,q}},[LC, Opts]} -> {qlc, lists:flatten([erl_pp:expr(LC), "."]), erl_parse:normalise(Opts)}; {call,_,{remote,_,{atom,_,ets},{atom,_,match_spec_run}},_} -> {match_spec, Expr}; {call,_,{remote,_,{atom,_,M},{atom,_,table}},_} -> {table, M, Expr}; _ -> [] end. -record(ji, {nmerge = 0, nlookup = 0, nnested_loop = 0, nkeysort = 0}). %% Counts join options and (all) calls to qlc:keysort(). join_info_count(H) -> S = qlc:info(H, {flat, false}), {ok, Tokens, _EndLine} = erl_scan:string(S++"."), {ok, [Expr]} = erl_parse:parse_exprs(Tokens), #ji{nmerge = Nmerge, nlookup = Nlookup, nkeysort = NKeysort, nnested_loop = Nnested_loop} = ji(Expr, #ji{}), {Nmerge, Nlookup, Nnested_loop, NKeysort}. ji({call,_,{remote,_,{atom,_,qlc},{atom,_,q}},[LC,Options]}, JI) -> NJI = case lists:keysearch(join, 1, erl_parse:normalise(Options)) of {value, {join, merge}} -> JI#ji{nmerge = JI#ji.nmerge + 1}; {value, {join, lookup}} -> JI#ji{nlookup = JI#ji.nlookup + 1}; {value, {join, nested_loop}} -> JI#ji{nnested_loop = JI#ji.nnested_loop + 1}; _ -> JI end, ji(LC, NJI); ji({call,_,{remote,_,{atom,_,qlc},{atom,_,keysort}},[_KP,H,_Options]}, JI) -> ji(H, JI#ji{nkeysort = JI#ji.nkeysort + 1}); ji(T, JI) when is_tuple(T) -> ji(tuple_to_list(T), JI); ji([E | Es], JI) -> ji(Es, ji(E, JI)); ji(_, JI) -> JI. %% Designed for ETS' and gb_table's format funs. lookup_keys(Q) -> case lists:flatten(lookup_keys(i(Q), [])) of [] -> false; L -> lists:usort(L) end. lookup_keys([Q | Qs], L) -> lookup_keys(Qs, lookup_keys(Q, L)); lookup_keys({qlc,_,Quals,_}, L) -> lookup_keys(Quals, L); lookup_keys({list,Q,_}, L) -> lookup_keys(Q, L); lookup_keys({generate,_,Q}, L) -> lookup_keys(Q, L); lookup_keys({table,Chars}, L) when is_list(Chars) -> {ok, Tokens, _} = erl_scan:string(lists:flatten(Chars++".")), {ok, [Expr]} = erl_parse:parse_exprs(Tokens), case Expr of {call,_,_,[_fun,AKs]} -> case erl_parse:normalise(AKs) of Ks when is_list(Ks) -> [lists:sort(Ks) | L]; K -> % assume keys are never lists (ets only) [K | L] end; _ -> % gb_table L end; lookup_keys(_Q, L) -> L. bad_table_format(Tab) -> Limit = 1, SelectFun = fun(MS) -> cb(ets:select(Tab, MS, Limit)) end, FormatFun = {is, no, good}, qlc:table(SelectFun, [{format_fun, FormatFun}]). bad_table_format_arity(Tab) -> Limit = 1, SelectFun = fun(MS) -> cb(ets:select(Tab, MS, Limit)) end, FormatFun = fun() -> {?MODULE, bad_table_format_arity, [Tab]} end, qlc:table(SelectFun, [{format_fun, FormatFun}]). bad_table_traverse(Tab) -> Limit = 1, Select = fun(MS, _) -> cb(ets:select(Tab, MS, Limit)) end, qlc:table(Select, []). bad_table_post(Tab) -> Limit = 1, SelectFun = fun(MS) -> cb(ets:select(Tab, MS, Limit)) end, qlc:table(SelectFun, [{pre_fun,undefined}, {post_fun, fun(X) -> X end}, {info_fun, undefined}]). bad_table_lookup(Tab) -> Limit = 1, SelectFun = fun(MS) -> cb(ets:select(Tab, MS, Limit)) end, qlc:table(SelectFun, {lookup_fun, fun(X) -> X end}). bad_table_max_lookup(Tab) -> Limit = 1, SelectFun = fun(MS) -> cb(ets:select(Tab, MS, Limit)) end, qlc:table(SelectFun, {max_lookup, -2}). bad_table_info_arity(Tab) -> Limit = 1, SelectFun = fun(MS) -> cb(ets:select(Tab, MS, Limit)) end, InfoFun = fun() -> {?MODULE, bad_table_info_arity, [Tab]} end, qlc:table(SelectFun, [{info_fun, InfoFun}]). default_table(Tab) -> Limit = 1, SelectFun = fun(MS) -> cb(ets:select(Tab, MS, Limit)) end, qlc:table(SelectFun, [{format_fun, undefined}, {info_fun, undefined}, {lookup_fun, undefined}, {parent_fun, undefined}, {pre_fun,undefined}, {post_fun, undefined}]). bad_table(Tab) -> Limit = 1, SelectFun = fun(MS) -> cb(ets:select(Tab, MS, Limit)) end, qlc:table(SelectFun, [{info, fun() -> ok end}]). bad_table_info_fun_n_objects(Tab) -> Limit = 1, SelectFun = fun(MS) -> cb(ets:select(Tab, MS, Limit)) end, LookupFun = fun(_Pos, Ks) -> lists:flatmap(fun(K) -> ets:lookup(Tab, K) end, Ks) end, InfoFun = fun(num_of_objects) -> exit(finito); (_) -> undefined end, qlc:table(SelectFun, [{info_fun, InfoFun}, {lookup_fun, LookupFun}]). bad_table_info_fun_indices(Tab) -> Limit = 1, SelectFun = fun(MS) -> cb(ets:select(Tab, MS, Limit)) end, LookupFun = fun(_Pos, Ks) -> lists:flatmap(fun(K) -> ets:lookup(Tab, K) end, Ks) end, InfoFun = fun(indices) -> throw({throw,apa}); (_) -> undefined end, qlc:table(SelectFun, [{info_fun, InfoFun}, {lookup_fun, LookupFun}]). bad_table_info_fun_keypos(Tab) -> Limit = 1, SelectFun = fun(MS) -> cb(ets:select(Tab, MS, Limit)) end, LookupFun = fun(_Pos, Ks) -> lists:flatmap(fun(K) -> ets:lookup(Tab, K) end, Ks) end, InfoFun = fun(indices) -> erlang:error(keypos); (_) -> undefined end, qlc:table(SelectFun, [{info_fun, InfoFun}, {lookup_fun, LookupFun}]). bad_table_key_equality(Tab) -> Limit = 1, SelectFun = fun(MS) -> cb(ets:select(Tab, MS, Limit)) end, LookupFun = fun(_Pos, Ks) -> lists:flatmap(fun(K) -> ets:lookup(Tab, K) end, Ks) end, qlc:table(SelectFun, [{lookup_fun, LookupFun},{key_equality,'=/='}]). cb('$end_of_table') -> []; cb({Objects,Cont}) -> Objects ++ fun() -> cb(ets:select(Cont)) end. i(H) -> i(H, []). i(H, Options) when is_list(Options) -> case has_format(Options) of true -> qlc:info(H, Options); false -> qlc:info(H, [{format, debug} | Options]) end; i(H, Option) -> i(H, [Option]). has_format({format,_}) -> true; has_format([E | Es]) -> has_format(E) or has_format(Es); has_format(_) -> false. format_info(H, Flat) -> L = qlc:info(H, [{flat, Flat}, {format,string}]), re:replace(L, "\s|\n|\t|\f|\r|\v", "", [{return,list},global]). %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% %% A list turned into a table... table_kill_parent(List, Indices) -> ParentFun = fun() -> exit(self(), kill) end, table_i(List, Indices, ParentFun). table_parent_throws(List, Indices) -> ParentFun = fun() -> throw({throw,thrown}) end, table_i(List, Indices, ParentFun). table_parent_exits(List, Indices) -> ParentFun = fun() -> 1 + Indices end, table_i(List, Indices, ParentFun). table_bad_parent_fun(List, Indices) -> ParentFun = fun(X) -> X end, % parent_fun should be nullary table_i(List, Indices, ParentFun). table(List, Indices) -> ParentFun = fun() -> self() end, table_i(List, Indices, ParentFun). table(List, KeyPos, Indices) -> ParentFun = fun() -> self() end, table(List, Indices, KeyPos, ParentFun). table_i(List, Indices, ParentFun) -> table(List, Indices, undefined, ParentFun). table(List, Indices, KeyPos, ParentFun) -> TraverseFun = fun() -> list_traverse(List) end, PreFun = fun(PreArgs) -> {value, {parent_value, Pid}} = lists:keysearch(parent_value, 1, PreArgs), true = is_pid(Pid) end, PostFun = fun() -> ok end, InfoFun = fun(indices) -> Indices; (is_unique_objects) -> undefined; (keypos) -> KeyPos; (num_of_objects) -> undefined; (_) -> undefined end, LookupFun = fun(Column, Values) -> lists:flatmap(fun(V) -> case lists:keysearch(V, Column, List) of false -> []; {value,Val} -> [Val] end end, Values) end, FormatFun = fun(all) -> L = 17, {call,L,{remote,L,{atom,1,?MODULE},{atom,L,the_list}}, [erl_parse:abstract(List, 17)]}; ({lookup, Column, Values}) -> {?MODULE, list_keys, [Values, Column, List]} end, qlc:table(TraverseFun, [{info_fun,InfoFun}, {pre_fun, PreFun}, {post_fun, PostFun}, {lookup_fun, LookupFun}, {format_fun, FormatFun}, {parent_fun, ParentFun}]). stop_list(List, Ets) -> Traverse = fun() -> list_traverse(List) end, PV = a_sample_parent_value, ParentFun = fun() -> PV end, Pre = fun(PreArgs) -> {value, {parent_value, PV}} = lists:keysearch(parent_value, 1, PreArgs), {value, {stop_fun, Fun}} = lists:keysearch(stop_fun, 1, PreArgs), true = ets:insert(Ets, {stop_fun, Fun}) end, qlc:table(Traverse, [{pre_fun, Pre}, {parent_fun, ParentFun}]). list_traverse([]) -> []; list_traverse([E | Es]) -> [E | fun() -> list_traverse(Es) end]. table_error(List, Error) -> table_error(List, undefined, Error). table_error(List, KeyPos, Error) -> TraverseFun = fun() -> list_traverse2(lists:sort(List), Error) end, InfoFun = fun(is_sorted_key) -> true; (keypos) -> KeyPos; (_) -> undefined end, qlc:table(TraverseFun, [{info_fun,InfoFun}]). list_traverse2([], Err) -> Err; list_traverse2([E | Es], Err) -> [E | fun() -> list_traverse2(Es, Err) end]. table_lookup_error(List) -> TraverseFun = fun() -> list_traverse(List) end, LookupFun = fun(_Column, _Values) -> {error,lookup,failed} end, InfoFun = fun(keypos) -> 1; (_) -> undefined end, qlc:table(TraverseFun, [{lookup_fun,LookupFun},{info_fun,InfoFun}]). prep_scratchdir(Dir) -> put('$qlc_tmpdir', true), _ = filelib:ensure_dir(Dir), lists:foreach(fun(F) -> file:delete(F) end, filelib:wildcard(filename:join(Dir, "*"))), true. %% Truncate just once. truncate_tmpfile(Dir, Where) -> case get('$qlc_tmpdir') of true -> {ok, [TmpFile0 | _]} = file:list_dir(Dir), TmpFile = filename:join(Dir, TmpFile0), truncate(TmpFile, Where), erase('$qlc_tmpdir'); _ -> true end. truncate(File, Where) -> {ok, Fd} = file:open(File, [read, write]), {ok, _} = file:position(Fd, Where), ok = file:truncate(Fd), ok = file:close(Fd). %% Crash just once. crash_tmpfile(Dir, Where) -> case get('$qlc_tmpdir') of true -> {ok, [TmpFile0 | _]} = file:list_dir(Dir), TmpFile = filename:join(Dir, TmpFile0), crash(TmpFile, Where), erase('$qlc_tmpdir'); _ -> true end. crash(File, Where) -> {ok, Fd} = file:open(File, [read, write]), {ok, _} = file:position(Fd, Where), ok = file:write(Fd, [10]), ok = file:close(Fd). %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% run(Config, Tests) -> run(Config, [], Tests). run(Config, Extra, Tests) -> lists:foreach(fun(Body) -> run_test(Config, Extra, Body) end, Tests). run_test(Config, Extra, {cres, Body, ExpectedCompileReturn}) -> run_test(Config, Extra, {cres, Body, _Opts = [], ExpectedCompileReturn}); run_test(Config, Extra, {cres, Body, Opts, ExpectedCompileReturn}) -> {SourceFile, Mod} = compile_file_mod(Config), P = [Extra,<<"function() -> ">>, Body, <<", ok. ">>], CompileReturn = compile_file(Config, P, Opts), case comp_compare(ExpectedCompileReturn, CompileReturn) of true -> ok; false -> expected(ExpectedCompileReturn, CompileReturn, SourceFile) end, AbsFile = filename:rootname(SourceFile, ".erl"), _ = code:purge(Mod), {module, _} = code:load_abs(AbsFile, Mod), Ms0 = erlang:process_info(self(),messages), Before = {get(), pps(), ets:all(), Ms0}, %% Prepare the check that the qlc module does not call qlc_pt. _ = [unload_pt() || {file, Name} <- [code:is_loaded(qlc_pt)], Name =/= cover_compiled], R = case catch Mod:function() of {'EXIT', _Reason} = Error -> ?t:format("failed, got ~p~n", [Error]), fail(SourceFile); Reply -> Reply end, %% Check that the qlc module does not call qlc_pt: case code:is_loaded(qlc_pt) of {file, cover_compiled} -> ok; {file, _} -> ?t:format("qlc_pt was loaded in runtime~n", []), fail(SourceFile); false -> ok end, wait_for_expected(R, Before, SourceFile, true), code:purge(Mod); run_test(Config, Extra, Body) -> run_test(Config, Extra, {cres,Body,[]}). wait_for_expected(R, Before, SourceFile, Wait) -> Ms = erlang:process_info(self(),messages), After = {get(), pps(), ets:all(), Ms}, case {R, After} of {ok, Before} -> ok; _ when Wait -> timer:sleep(1000), wait_for_expected(R, Before, SourceFile, false); _ -> expected({ok,Before}, {R,After}, SourceFile) end. unload_pt() -> erlang:garbage_collect(), % get rid of references to qlc_pt... _ = code:purge(qlc_pt), _ = code:delete(qlc_pt). compile_format(Config, Tests) -> Fun = fun(Test, Opts) -> Return = compile_file(Config, Test, Opts), format_messages(Return) end, compile(Config, Tests, Fun). format_messages({warnings,Ws}) -> format_messages({errors,[],Ws}); format_messages({errors,Es,Ws}) -> {[format_msg(E, Mod) || {_Line,Mod,E} <- Es], [format_msg(W, Mod) || {_Line,Mod,W} <- Ws]}. format_msg(Msg, Mod) -> IOlist = Mod:format_error(Msg), binary_to_list(iolist_to_binary(IOlist)). compile(Config, Tests) -> Fun = fun(Test, Opts) -> catch compile_file(Config, Test, Opts) end, compile(Config, Tests, Fun). compile(Config, Tests, Fun) -> F = fun({TestName,Test,Opts,Expected}, BadL) -> Return = Fun(Test, Opts), case comp_compare(Expected, Return) of true -> BadL; false -> {File, _Mod} = compile_file_mod(Config), expected(TestName, Expected, Return, File) end end, lists:foldl(F, [], Tests). %% Compiles a test module and returns the list of errors and warnings. compile_file(Config, Test0, Opts0) -> {File, Mod} = compile_file_mod(Config), Test = list_to_binary(["-module(", atom_to_list(Mod), "). " "-compile(export_all). " "-import(qlc_SUITE, [i/1,i/2,format_info/2]). " "-import(qlc_SUITE, [etsc/2, etsc/3]). " "-import(qlc_SUITE, [create_ets/2]). " "-import(qlc_SUITE, [strip_qlc_call/1]). " "-import(qlc_SUITE, [join_info/1]). " "-import(qlc_SUITE, [join_info_count/1]). " "-import(qlc_SUITE, [lookup_keys/1]). " "-include_lib(\"stdlib/include/qlc.hrl\"). ", Test0]), Opts = [export_all,return,nowarn_unused_record,{outdir,?privdir}|Opts0], ok = file:write_file(File, Test), case compile:file(File, Opts) of {ok, _M, Ws} -> warnings(File, Ws); {error, [{File,Es}], []} -> {errors, Es, []}; {error, [{File,Es}], [{File,Ws}]} -> {error, Es, Ws} end. comp_compare(T, T) -> true; comp_compare(T1, T2_0) -> T2 = wskip(T2_0), T1 =:= T2 %% This clause should eventually be removed. orelse ln(T1) =:= T2 orelse T1 =:= ln(T2). wskip([]) -> []; wskip([{_,sys_core_fold,{eval_failure,badarg}}|L]) -> wskip(L); wskip([{{L,_C},sys_core_fold,M}|L]) -> [{L,sys_core_fold,M}|wskip(L)]; wskip({T,L}) -> {T,wskip(L)}; wskip([M|L]) -> [M|wskip(L)]; wskip(T) -> T. %% Replaces locations like {Line,Column} with Line. ln({warnings,L}) -> {warnings,ln0(L)}; ln({errors,EL,WL}) -> {errors,ln0(EL),ln0(WL)}; ln(L) -> ln0(L). ln0(L) -> lists:sort(ln1(L)). ln1([]) -> []; ln1([{File,Ms}|MsL]) when is_list(File) -> [{File,ln0(Ms)}|ln1(MsL)]; ln1([{{L,_C},Mod,Mess0}|Ms]) -> Mess = case Mess0 of {exported_var,V,{Where,{L1,_C1}}} -> {exported_var,V,{Where,L1}}; {unsafe_var,V,{Where,{L1,_C1}}} -> {unsafe_var,V,{Where,L1}}; %% There are more... M -> M end, [{L,Mod,Mess}|ln1(Ms)]; ln1([M|Ms]) -> [M|ln1(Ms)]. %% -> {FileName, Module}; {string(), atom()} compile_file_mod(Config) -> NameL = lists:concat([?TESTMODULE, "_", ?testcase]), Name = list_to_atom(NameL), File = filename(NameL ++ ".erl", Config), {File, Name}. filename(Name, Config) when is_atom(Name) -> filename(atom_to_list(Name), Config); filename(Name, Config) -> filename:join(?privdir, Name). pps() -> {port_list(), process_list()}. port_list() -> [{P,safe_second_element(erlang:port_info(P, name))} || P <- erlang:ports()]. process_list() -> [{P,process_info(P, registered_name), safe_second_element(process_info(P, initial_call))} || P <- processes(), is_process_alive(P)]. safe_second_element({_,Info}) -> Info; safe_second_element(Other) -> Other. warnings(File, Ws) -> case lists:append([W || {F, W} <- Ws, F =:= File]) of [] -> []; L -> {warnings, L} end. expected(Test, Expected, Got, File) -> ?t:format("~nTest ~p failed. ", [Test]), expected(Expected, Got, File). expected(Expected, Got, File) -> ?t:format("Expected~n ~p~n, but got~n ~p~n", [Expected, Got]), fail(File). fail(Source) -> io:format("failed~n"), ?t:fail({failed,testcase,on,Source}). %% Copied from global_SUITE.erl. install_error_logger() -> error_logger:add_report_handler(?MODULE, self()). uninstall_error_logger() -> error_logger:delete_report_handler(?MODULE). read_error_logger() -> receive {error, Why} -> {error, Why}; {info, Why} -> {info, Why}; {error, Pid, Tuple} -> {error, Pid, Tuple} after 1000 -> ?line io:format("No reply after 1 s\n", []), ?line ?t:fail() end. %%----------------------------------------------------------------- %% The error_logger handler used. %% (Copied from stdlib/test/proc_lib_SUITE.erl.) %%----------------------------------------------------------------- init(Tester) -> {ok, Tester}. handle_event({error, _GL, {_Pid, _Msg, [Why, _]}}, Tester) when is_atom(Why) -> Tester ! {error, Why}, {ok, Tester}; handle_event({error, _GL, {_Pid, _Msg, [P, T]}}, Tester) when is_pid(P) -> Tester ! {error, P, T}, {ok, Tester}; handle_event({info_msg, _GL, {_Pid, _Msg, [Why, _]}}, Tester) -> Tester ! {info, Why}, {ok, Tester}; handle_event(_Event, State) -> {ok, State}. handle_info(_, State) -> {ok, State}. handle_call(_Query, State) -> {ok, {error, bad_query}, State}. terminate(_Reason, State) -> State.