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diff --git a/lib/mnesia/test/mnesia_index_plugin_test.erl b/lib/mnesia/test/mnesia_index_plugin_test.erl
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+%%
+%% %CopyrightBegin%
+%%
+%% Copyright Ericsson AB 1996-2018. All Rights Reserved.
+%%
+%% Licensed under the Apache License, Version 2.0 (the "License");
+%% you may not use this file except in compliance with the License.
+%% You may obtain a copy of the License at
+%%
+%% http://www.apache.org/licenses/LICENSE-2.0
+%%
+%% Unless required by applicable law or agreed to in writing, software
+%% distributed under the License is distributed on an "AS IS" BASIS,
+%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+%% See the License for the specific language governing permissions and
+%% limitations under the License.
+%%
+%% %CopyrightEnd%
+%%
+
+%%
+-module(mnesia_index_plugin_test).
+-author('[email protected]').
+
+-export([init_per_testcase/2, end_per_testcase/2,
+ init_per_group/2, end_per_group/2,
+ init_per_suite/1, end_per_suite/1,
+ all/0, groups/0]).
+
+-export([
+ add_rm_plugin/1,
+ tab_with_plugin_index/1,
+ tab_with_multiple_plugin_indexes/1,
+ ix_match_w_plugin/1,
+ ix_match_w_plugin_ordered/1,
+ ix_match_w_plugin_bag/1
+ ]).
+
+-export([ix_prefixes/3, % test plugin
+ ix_prefixes2/3]). % test plugin 2
+
+-include("mnesia_test_lib.hrl").
+
+init_per_suite(Conf) ->
+ Conf.
+
+end_per_suite(Conf) ->
+ Conf.
+
+init_per_testcase(Func, Conf) ->
+ mnesia_test_lib:init_per_testcase(Func, Conf).
+
+end_per_testcase(Func, Conf) ->
+ mnesia_test_lib:end_per_testcase(Func, Conf).
+
+all() ->
+ [add_rm_plugin,
+ tab_with_plugin_index,
+ tab_with_multiple_plugin_indexes,
+ ix_match_w_plugin,
+ ix_match_w_plugin_ordered,
+ ix_match_w_plugin_bag].
+
+groups() ->
+ [].
+
+init_per_group(_GroupName, Config) ->
+ Config.
+
+end_per_group(_GroupName, Config) ->
+ Config.
+
+
+add_rm_plugin(suite) -> [];
+add_rm_plugin(Config) when is_list(Config) ->
+ [N1, N2] = Nodes = ?acquire_nodes(2, Config),
+ ok = add_plugin(),
+ ok = rpc_check_plugin(N1),
+ ok = rpc_check_plugin(N2),
+ ok = add_plugin2(),
+ ok = del_plugin(),
+ ok = del_plugin2(),
+ ok = add_plugin(),
+ ok = add_plugin2(),
+ ok = del_plugin(),
+ ok = del_plugin2(),
+ ?verify_mnesia(Nodes, []).
+
+-define(PLUGIN1, {{pfx},?MODULE,ix_prefixes}).
+-define(PLUGIN2, {{pfx2},?MODULE,ix_prefixes2}).
+
+add_plugin() ->
+ {atomic, ok} = mnesia_schema:add_index_plugin({pfx}, ?MODULE, ix_prefixes),
+ [?PLUGIN1] = mnesia_schema:index_plugins(),
+ ok.
+
+add_plugin2() ->
+ {atomic, ok} = mnesia_schema:add_index_plugin({pfx2}, ?MODULE, ix_prefixes2),
+ [?PLUGIN1, ?PLUGIN2] = lists:sort(mnesia_schema:index_plugins()),
+ ok.
+
+del_plugin() ->
+ {atomic, ok} = mnesia_schema:delete_index_plugin({pfx}),
+ [?PLUGIN2] = mnesia_schema:index_plugins(),
+ ok.
+
+del_plugin2() ->
+ {atomic, ok} = mnesia_schema:delete_index_plugin({pfx2}),
+ [] = mnesia_schema:index_plugins(),
+ ok.
+
+rpc_check_plugin(N) ->
+ [?PLUGIN1] =
+ rpc:call(N, mnesia_schema, index_plugins, []),
+ ok.
+
+tab_with_plugin_index(suite) -> [];
+tab_with_plugin_index(Config) when is_list(Config) ->
+ [_N1] = Nodes = ?acquire_nodes(1, Config),
+ ok = add_plugin(),
+ {atomic, ok} = mnesia:create_table(t, [{attributes, [k,v1,v2]},
+ {index, [{{pfx}, ordered},
+ {v1, ordered},
+ v2]}]),
+ [ok,ok,ok,ok] =
+ [mnesia:dirty_write({t, K, V1, V2})
+ || {K,V1,V2} <- [{1,a,"123"},
+ {2,b,"12345"},
+ {3,c,"6789"},
+ {4,d,nil}]],
+ [{t,1,a,"123"},{t,2,b,"12345"}] =
+ mnesia:dirty_index_read(t,<<"123">>,{pfx}),
+ [{t,3,c,"6789"}] =
+ mnesia:dirty_index_read(t,"6789",v2),
+ [{t,1,a,"123"}] =
+ mnesia:dirty_match_object({t,'_',a,"123"}),
+ [{t,1,a,"123"}] =
+ mnesia:dirty_select(t, [{ {t,'_',a,"123"}, [], ['$_']}]),
+ mnesia:dirty_delete(t,2),
+ [{t,1,a,"123"}] =
+ mnesia:dirty_index_read(t,<<"123">>,{pfx}),
+ ?verify_mnesia(Nodes, []).
+
+tab_with_multiple_plugin_indexes(suite) -> [];
+tab_with_multiple_plugin_indexes(Config) when is_list(Config) ->
+ [_N1] = Nodes = ?acquire_nodes(1, Config),
+ ok = add_plugin(),
+ ok = add_plugin2(),
+ {atomic, ok} =
+ mnesia:create_table(u, [{attributes, [k,v1,v2]},
+ {index, [{{pfx}, ordered},
+ {{pfx2}, ordered}]}]),
+ [ok,ok,ok,ok] =
+ [mnesia:dirty_write({u, K, V1, V2})
+ || {K,V1,V2} <- [{1,a,"123"},
+ {2,b,"12345"},
+ {3,c,"6789"},
+ {4,d,nil}]],
+ [{u,1,a,"123"},{u,2,b,"12345"}] =
+ mnesia:dirty_index_read(u,<<"123">>,{pfx}),
+ [{u,1,a,"123"},{u,2,b,"12345"}] =
+ mnesia:dirty_index_read(u,<<"321">>,{pfx2}),
+ ?verify_mnesia(Nodes, []).
+
+ix_match_w_plugin(suite) -> [];
+ix_match_w_plugin(Config) when is_list(Config) ->
+ [_N1] = Nodes = ?acquire_nodes(1, Config),
+ ok = add_plugin(),
+ {atomic, ok} = mnesia:create_table(im1, [{attributes, [k, v1, v2]},
+ {index, [{{pfx}, ordered},
+ {v1, ordered}]}]),
+ fill_and_test_index_match(im1, set),
+ ?verify_mnesia(Nodes, []).
+
+
+ix_match_w_plugin_ordered(suite) -> [];
+ix_match_w_plugin_ordered(Config) when is_list(Config) ->
+ [_N1] = Nodes = ?acquire_nodes(1, Config),
+ ok = add_plugin(),
+ {atomic, ok} = mnesia:create_table(im2, [{attributes, [k, v1, v2]},
+ {type, ordered_set},
+ {index, [{{pfx}, ordered},
+ {v1, ordered}]}]),
+ fill_and_test_index_match(im2, ordered_set),
+ ?verify_mnesia(Nodes, []).
+
+ix_match_w_plugin_bag(suite) -> [];
+ix_match_w_plugin_bag(Config) when is_list(Config) ->
+ [_N1] = Nodes = ?acquire_nodes(1, Config),
+ ok = add_plugin(),
+ {atomic, ok} = mnesia:create_table(im3, [{attributes, [k, v1, v2]},
+ {type, bag},
+ {index, [{{pfx}, ordered},
+ {v1, ordered}]}]),
+ fill_and_test_index_match(im3, bag),
+ ?verify_mnesia(Nodes, []).
+
+fill_and_test_index_match(Tab, Type) ->
+ [ok,ok,ok,ok,ok,ok,ok,ok,ok] =
+ [mnesia:dirty_write({Tab, K, V1, V2})
+ || {K,V1,V2} <- [{1,a,"123"},
+ {2,b,"12345"},
+ {3,c,"123"},
+ {4,d,nil},
+ {5,e,nil},
+ {6,f,nil},
+ {7,g,nil}, %% overwritten if not bag
+ {7,g,"234"},
+ {8,h,"123"}]],
+ mnesia:activity(
+ transaction,
+ fun() ->
+ ok = mnesia:write({Tab, 1, aa, "1234"}), %% replaces if not bag
+ ok = mnesia:delete({Tab, 2}),
+ ok = mnesia:delete({Tab, 4}),
+ ok = mnesia:write({Tab, 6, ff, nil}),
+ ok = mnesia:write({Tab, 7, gg, "123"}),
+ ok = mnesia:write({Tab, 100, x, nil}),
+ ok = mnesia:delete_object({Tab,3,c,"123"}),
+ ok = mnesia:delete_object({Tab,5,e,nil}),
+ Res = mnesia:index_read(Tab, <<"123">>, {pfx}),
+ SetRes = [{Tab,1,aa,"1234"}, {Tab,7,gg,"123"}, {Tab,8,h,"123"}],
+ case Type of
+ set ->
+ SetRes = lists:sort(Res);
+ ordered_set ->
+ SetRes = Res;
+ bag ->
+ [{Tab,1,a,"123"}, {Tab,1,aa,"1234"},
+ {Tab,7,gg,"123"}, {Tab,8,h,"123"}] = lists:sort(Res)
+ end
+ end).
+
+%% ============================================================
+%%
+ix_prefixes(_Tab, _Pos, Obj) ->
+ lists:foldl(
+ fun(V, Acc) when is_list(V) ->
+ try Pfxs = prefixes(list_to_binary(V)),
+ Pfxs ++ Acc
+ catch
+ error:_ ->
+ Acc
+ end;
+ (V, Acc) when is_binary(V) ->
+ Pfxs = prefixes(V),
+ Pfxs ++ Acc;
+ (_, Acc) ->
+ Acc
+ end, [], tl(tuple_to_list(Obj))).
+
+ix_prefixes2(Tab, Pos, Obj) ->
+ [rev(P) || P <- ix_prefixes(Tab, Pos, Obj)].
+
+rev(B) when is_binary(B) ->
+ list_to_binary(lists:reverse(binary_to_list(B))).
+
+prefixes(<<P:3/binary, _/binary>>) ->
+ [P];
+prefixes(_) ->
+ [].
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