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/* Copyright (C) 2010 Monty Program 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; 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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#ifdef USE_PRAGMA_INTERFACE
#pragma interface /* gcc class implementation */
#endif
/* Open handlers are stored here */
class SQL_HANDLER {
public:
TABLE *table;
List<Item> fields; /* Fields, set on open */
THD *thd;
LEX_STRING handler_name;
LEX_STRING db;
LEX_STRING table_name;
MEM_ROOT mem_root;
MYSQL_LOCK *lock;
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::INITIALIZED)
{ init(); clear_alloc_root(&mem_root); base_data= 0; }
void init() { keyno= -1; table= 0; lock= 0; }
void reset();
~SQL_HANDLER();
};
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,char *,
List<Item> *,enum ha_rkey_function,Item *,ha_rows,ha_rows);
void mysql_ha_flush(THD *thd);
void mysql_ha_rm_tables(THD *thd, TABLE_LIST *tables, bool is_locked);
void mysql_ha_cleanup(THD *thd);
SQL_HANDLER *mysql_ha_read_prepare(THD *thd, TABLE_LIST *tables,
enum enum_ha_read_modes mode, char *keyname,
List<Item> *key_expr, Item *cond);
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