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e231ebe5fb
This bug occurs when some trigger for table used by DML statement is created or changed while statement was waiting in lock_tables(). In this situation prelocking set which we have calculated becames invalid which can easily lead to errors and even in some cases to crashes. With proposed patch we no longer silently reopen tables in lock_tables(), instead caller of lock_tables() becomes responsible for reopening tables and recalculation of prelocking set.
116 lines
3.5 KiB
C++
116 lines
3.5 KiB
C++
/* -*- C++ -*- */
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/* Copyright (C) 2002 MySQL AB
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
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#ifndef _SP_H_
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#define _SP_H_
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// Return codes from sp_create_*, sp_drop_*, and sp_show_*:
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#define SP_OK 0
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#define SP_KEY_NOT_FOUND -1
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#define SP_OPEN_TABLE_FAILED -2
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#define SP_WRITE_ROW_FAILED -3
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#define SP_DELETE_ROW_FAILED -4
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#define SP_GET_FIELD_FAILED -5
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#define SP_PARSE_ERROR -6
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#define SP_INTERNAL_ERROR -7
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#define SP_NO_DB_ERROR -8
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#define SP_BAD_IDENTIFIER -9
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#define SP_BODY_TOO_LONG -10
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/* Drop all routines in database 'db' */
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int
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sp_drop_db_routines(THD *thd, char *db);
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sp_head *
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sp_find_procedure(THD *thd, sp_name *name, bool cache_only = 0);
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int
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sp_exists_routine(THD *thd, TABLE_LIST *procs, bool any, bool no_error);
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int
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sp_create_procedure(THD *thd, sp_head *sp);
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int
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sp_drop_procedure(THD *thd, sp_name *name);
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int
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sp_update_procedure(THD *thd, sp_name *name, st_sp_chistics *chistics);
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int
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sp_show_create_procedure(THD *thd, sp_name *name);
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int
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sp_show_status_procedure(THD *thd, const char *wild);
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sp_head *
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sp_find_function(THD *thd, sp_name *name, bool cache_only = 0);
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int
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sp_create_function(THD *thd, sp_head *sp);
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int
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sp_drop_function(THD *thd, sp_name *name);
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int
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sp_update_function(THD *thd, sp_name *name, st_sp_chistics *chistics);
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int
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sp_show_create_function(THD *thd, sp_name *name);
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int
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sp_show_status_function(THD *thd, const char *wild);
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/*
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Procedures for pre-caching of stored routines and building table list
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for prelocking.
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*/
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void sp_get_prelocking_info(THD *thd, bool *need_prelocking,
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bool *first_no_prelocking);
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void sp_add_used_routine(LEX *lex, Query_arena *arena,
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sp_name *rt, char rt_type);
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void sp_remove_not_own_routines(LEX *lex);
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void sp_update_sp_used_routines(HASH *dst, HASH *src);
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bool sp_cache_routines_and_add_tables(THD *thd, LEX *lex,
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bool first_no_prelock);
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void sp_cache_routines_and_add_tables_for_view(THD *thd, LEX *lex,
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LEX *aux_lex);
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void sp_cache_routines_and_add_tables_for_triggers(THD *thd, LEX *lex,
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Table_triggers_list *triggers);
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extern "C" byte* sp_sroutine_key(const byte *ptr, uint *plen, my_bool first);
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/*
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Routines which allow open/lock and close mysql.proc table even when
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we already have some tables open and locked.
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*/
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TABLE *open_proc_table_for_read(THD *thd, Open_tables_state *backup);
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void close_proc_table(THD *thd, Open_tables_state *backup);
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//
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// Utilities...
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//
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// Do a "use newdb". The current db is stored at olddb.
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// If newdb is the same as the current one, nothing is changed.
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// dbchangedp is set to true if the db was actually changed.
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int
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sp_use_new_db(THD *thd, char *newdb, char *olddb, uint olddbmax,
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bool no_access_check, bool *dbchangedp);
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#endif /* _SP_H_ */
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