Current File : //usr/include/mysql/server/private/sql_handler.h
#ifndef SQL_HANDLER_INCLUDED
#define SQL_HANDLER_INCLUDED
/* Copyright (c) 2006, 2015, Oracle and/or its affiliates.
Copyright (C) 2010, 2015, MariaDB
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; version 2 of the License.
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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */
#ifdef USE_PRAGMA_INTERFACE
#pragma interface /* gcc class implementation */
#endif
#include "sql_class.h" /* enum_ha_read_mode */
#include "my_base.h" /* ha_rkey_function, ha_rows */
#include "sql_list.h" /* List */
/* Open handlers are stored here */
class SQL_HANDLER {
public:
TABLE *table;
List<Item> fields; /* Fields, set on open */
THD *thd;
LEX_CSTRING handler_name;
LEX_CSTRING db;
LEX_CSTRING table_name;
MEM_ROOT mem_root;
MYSQL_LOCK *lock;
MDL_request mdl_request;
key_part_map keypart_map;
int keyno; /* Used key */
uint key_len;
enum enum_ha_read_modes mode;
/* This is only used when deleting many handler objects */
SQL_HANDLER *next;
Query_arena arena;
char *base_data;
SQL_HANDLER(THD *thd_arg) :
thd(thd_arg), arena(&mem_root, Query_arena::STMT_INITIALIZED)
{ init(); clear_alloc_root(&mem_root); base_data= 0; }
void init()
{
keyno= -1;
table= 0;
lock= 0;
mdl_request.ticket= 0;
}
void reset();
~SQL_HANDLER();
};
class THD;
struct TABLE_LIST;
bool mysql_ha_open(THD *thd, TABLE_LIST *tables, SQL_HANDLER *reopen);
bool mysql_ha_close(THD *thd, TABLE_LIST *tables);
bool mysql_ha_read(THD *, TABLE_LIST *,enum enum_ha_read_modes, const char *,
List<Item> *,enum ha_rkey_function,Item *,ha_rows,ha_rows);
void mysql_ha_flush(THD *thd);
void mysql_ha_flush_tables(THD *thd, TABLE_LIST *all_tables);
void mysql_ha_rm_tables(THD *thd, TABLE_LIST *tables);
void mysql_ha_cleanup_no_free(THD *thd);
void mysql_ha_cleanup(THD *thd);
void mysql_ha_set_explicit_lock_duration(THD *thd);
void mysql_ha_rm_temporary_tables(THD *thd);
SQL_HANDLER *mysql_ha_read_prepare(THD *thd, TABLE_LIST *tables,
enum enum_ha_read_modes mode,
const char *keyname,
List<Item> *key_expr, enum ha_rkey_function ha_rkey_mode,
Item *cond);
#endif
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