mariadb/sql/sp.h
dlenev@brandersnatch.localdomain 5a6c7027f0 Better approach for prelocking of tables for stored routines execution
and some SP-related cleanups.

- We don't have separate stage for calculation of list of tables
  to be prelocked and doing implicit LOCK/UNLOCK any more.
  Instead we calculate this list at open_tables() and do implicit
  LOCK in lock_tables() (and UNLOCK in close_thread_tables()).
  Also now we support cases when same table (with same alias) is
  used several times in the same query in SP.

- Cleaned up execution of SP. Moved all common code which handles
  LEX and does preparations before statement execution or complex
  expression evaluation to auxilary sp_lex_keeper class. Now 
  all statements in SP (and corresponding instructions) that
  evaluate expression which can contain subquery have their
  own LEX.
2005-03-04 16:35:28 +03:00

106 lines
2.7 KiB
C++

/* -*- C++ -*- */
/* Copyright (C) 2002 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#ifndef _SP_H_
#define _SP_H_
// Return codes from sp_create_*, sp_drop_*, and sp_show_*:
#define SP_OK 0
#define SP_KEY_NOT_FOUND -1
#define SP_OPEN_TABLE_FAILED -2
#define SP_WRITE_ROW_FAILED -3
#define SP_DELETE_ROW_FAILED -4
#define SP_GET_FIELD_FAILED -5
#define SP_PARSE_ERROR -6
#define SP_INTERNAL_ERROR -7
#define SP_NO_DB_ERROR -8
/* Drop all routines in database 'db' */
int
sp_drop_db_routines(THD *thd, char *db);
sp_head *
sp_find_procedure(THD *thd, sp_name *name, bool cache_only = 0);
int
sp_exists_routine(THD *thd, TABLE_LIST *procs, bool any, bool no_error);
int
sp_create_procedure(THD *thd, sp_head *sp);
int
sp_drop_procedure(THD *thd, sp_name *name);
int
sp_update_procedure(THD *thd, sp_name *name, st_sp_chistics *chistics);
int
sp_show_create_procedure(THD *thd, sp_name *name);
int
sp_show_status_procedure(THD *thd, const char *wild);
sp_head *
sp_find_function(THD *thd, sp_name *name, bool cache_only = 0);
int
sp_create_function(THD *thd, sp_head *sp);
int
sp_drop_function(THD *thd, sp_name *name);
int
sp_update_function(THD *thd, sp_name *name, st_sp_chistics *chistics);
int
sp_show_create_function(THD *thd, sp_name *name);
int
sp_show_status_function(THD *thd, const char *wild);
bool
sp_function_exists(THD *thd, sp_name *name);
/*
* For precaching of functions and procedures
*/
void
sp_add_to_hash(HASH *h, sp_name *fun);
bool
sp_merge_hash(HASH *dst, HASH *src);
void
sp_cache_routines(THD *thd, LEX *lex);
//
// Utilities...
//
// Do a "use newdb". The current db is stored at olddb.
// If newdb is the same as the current one, nothing is changed.
// dbchangedp is set to true if the db was actually changed.
int
sp_use_new_db(THD *thd, char *newdb, char *olddb, uint olddbmax,
bool no_access_check, bool *dbchangedp);
// Like mysql_change_db() but handles empty db name and the send_ok() problem.
int
sp_change_db(THD *thd, char *db, bool no_access_check);
#endif /* _SP_H_ */