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----------------------------------------------------------
revno: 2630.22.11
committer: Konstantin Osipov <konstantin@mysql.com>
branch nick: mysql-6.0-records
timestamp: Mon 2008-08-11 16:40:09 +0400
message:
  Move read_record related functions to a new header - records.h

sql/Makefile.am:
  Introduce records.h
sql/handler.h:
  Forward-declare class handler (an unnecessary forward declaration
  was removed from mysql_priv.h).
sql/item_subselect.cc:
  Make read_record function naming more consistent.
  Assign read_record function at once, no need to defer till
  read_first_record invocation.
sql/mysql_priv.h:
  Include records.h, previously part of structs.h
sql/records.cc:
  Use records.h
sql/sql_select.h:
  Update to use new declarations.
sql/structs.h:
  Move declarations of READ_RECORD and related functions to records.h
This commit is contained in:
Konstantin Osipov 2009-10-16 19:58:26 +04:00
commit f0ccd917cc
9 changed files with 92 additions and 40 deletions
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75
sql/records.h Normal file
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#ifndef SQL_RECORDS_H
#define SQL_RECORDS_H
/* Copyright (C) 2008 Sun/MySQL
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
#include <my_global.h> /* for uint typedefs */
struct st_join_table;
class handler;
struct TABLE;
class THD;
class SQL_SELECT;
/**
A context for reading through a single table using a chosen access method:
index read, scan, etc, use of cache, etc.
Use by:
READ_RECORD read_record;
init_read_record(&read_record, ...);
while (read_record.read_record())
{
...
}
end_read_record();
*/
struct READ_RECORD
{
typedef int (*Read_func)(READ_RECORD*);
typedef int (*Setup_func)(struct st_join_table*);
TABLE *table; /* Head-form */
handler *file;
TABLE **forms; /* head and ref forms */
Read_func read_record;
THD *thd;
SQL_SELECT *select;
uint cache_records;
uint ref_length,struct_length,reclength,rec_cache_size,error_offset;
uint index;
uchar *ref_pos; /* pointer to form->refpos */
uchar *record;
uchar *rec_buf; /* to read field values after filesort */
uchar *cache,*cache_pos,*cache_end,*read_positions;
struct st_io_cache *io_cache;
bool print_error, ignore_not_found_rows;
public:
READ_RECORD() {}
};
void init_read_record(READ_RECORD *info, THD *thd, TABLE *reg_form,
SQL_SELECT *select, int use_record_cache,
bool print_errors, bool disable_rr_cache);
void init_read_record_idx(READ_RECORD *info, THD *thd, TABLE *table,
bool print_error, uint idx);
void end_read_record(READ_RECORD *info);
#endif /* SQL_RECORDS_H */