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86 lines
2.3 KiB
C++
86 lines
2.3 KiB
C++
/*
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This class holds all information about triggers of table.
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QQ: Will it be merged into TABLE in future ?
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*/
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class Table_triggers_list: public Sql_alloc
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{
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/* Triggers as SPs grouped by event, action_time */
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sp_head *bodies[3][2];
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/*
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Copy of TABLE::Field array with field pointers set to old version
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of record, used for OLD values in trigger on UPDATE.
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*/
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Field **old_field;
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/*
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Names of triggers.
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Should correspond to order of triggers on definitions_list,
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used in CREATE/DROP TRIGGER for looking up trigger by name.
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*/
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List<LEX_STRING> names_list;
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public:
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/*
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Field responsible for storing triggers definitions in file.
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It have to be public because we are using it directly from parser.
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*/
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List<LEX_STRING> definitions_list;
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Table_triggers_list():
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old_field(0)
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{
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bzero((char *)bodies, sizeof(bodies));
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}
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~Table_triggers_list();
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bool create_trigger(THD *thd, TABLE_LIST *table);
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bool drop_trigger(THD *thd, TABLE_LIST *table);
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bool process_triggers(THD *thd, trg_event_type event,
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trg_action_time_type time_type)
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{
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int res= 0;
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if (bodies[event][time_type])
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{
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#ifndef EMBEDDED_LIBRARY
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/* Surpress OK packets in case if we will execute statements */
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my_bool nsok= thd->net.no_send_ok;
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thd->net.no_send_ok= TRUE;
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#endif
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/*
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FIXME: We should juggle with security context here (because trigger
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should be invoked with creator rights).
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*/
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/*
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We disable binlogging, as in SP/functions, even though currently
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triggers can't do updates. When triggers can do updates, someone
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should add such a trigger to rpl_sp.test to verify that the update
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does NOT go into binlog.
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*/
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tmp_disable_binlog(thd);
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res= bodies[event][time_type]->execute_function(thd, 0, 0, 0);
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reenable_binlog(thd);
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#ifndef EMBEDDED_LIBRARY
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thd->net.no_send_ok= nsok;
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#endif
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}
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return res;
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}
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static bool check_n_load(THD *thd, const char *db, const char *table_name,
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TABLE *table);
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bool has_delete_triggers()
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{
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return (bodies[TRG_EVENT_DELETE][TRG_ACTION_BEFORE] ||
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bodies[TRG_EVENT_DELETE][TRG_ACTION_AFTER]);
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}
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friend class Item_trigger_field;
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private:
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bool prepare_old_row_accessors(TABLE *table);
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};
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