myisammrg.h
上传用户:romrleung
上传日期:2022-05-23
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文件大小:4k
- /* Copyright (C) 2000 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 */
- /* This file should be included when using merge_isam_funktions */
- #ifndef _myisammrg_h
- #define _myisammrg_h
- #ifdef __cplusplus
- extern "C" {
- #endif
- #ifndef _my_base_h
- #include <my_base.h>
- #endif
- #ifndef _myisam_h
- #include <myisam.h>
- #endif
- #include <queues.h>
- #define MYRG_NAME_EXT ".MRG"
- /* In which table to INSERT rows */
- #define MERGE_INSERT_DISABLED 0
- #define MERGE_INSERT_TO_FIRST 1
- #define MERGE_INSERT_TO_LAST 2
- extern TYPELIB merge_insert_method;
- /* Param to/from myrg_info */
- typedef struct st_mymerge_info /* Struct from h_info */
- {
- ulonglong records; /* Records in database */
- ulonglong deleted; /* Deleted records in database */
- ulonglong recpos; /* Pos for last used record */
- ulonglong data_file_length;
- uint reclength; /* Recordlength */
- int errkey; /* With key was dupplicated on err */
- uint options; /* HA_OPTION_... used */
- ulong *rec_per_key; /* for sql optimizing */
- } MYMERGE_INFO;
- typedef struct st_myrg_table_info
- {
- struct st_myisam_info *table;
- ulonglong file_offset;
- } MYRG_TABLE;
- typedef struct st_myrg_info
- {
- MYRG_TABLE *open_tables,*current_table,*end_table,*last_used_table;
- ulonglong records; /* records in tables */
- ulonglong del; /* Removed records */
- ulonglong data_file_length;
- ulong cache_size;
- uint merge_insert_method;
- uint tables,options,reclength,keys;
- my_bool cache_in_use;
- LIST open_list;
- QUEUE by_key;
- ulong *rec_per_key_part; /* for sql optimizing */
- } MYRG_INFO;
- /* Prototypes for merge-functions */
- extern int myrg_close(MYRG_INFO *file);
- extern int myrg_delete(MYRG_INFO *file,const byte *buff);
- extern MYRG_INFO *myrg_open(const char *name,int mode,int wait_if_locked);
- extern int myrg_panic(enum ha_panic_function function);
- extern int myrg_rfirst(MYRG_INFO *file,byte *buf,int inx);
- extern int myrg_rlast(MYRG_INFO *file,byte *buf,int inx);
- extern int myrg_rnext(MYRG_INFO *file,byte *buf,int inx);
- extern int myrg_rprev(MYRG_INFO *file,byte *buf,int inx);
- extern int myrg_rnext_same(MYRG_INFO *file,byte *buf);
- extern int myrg_rkey(MYRG_INFO *file,byte *buf,int inx,const byte *key,
- uint key_len, enum ha_rkey_function search_flag);
- extern int myrg_rrnd(MYRG_INFO *file,byte *buf,ulonglong pos);
- extern int myrg_rsame(MYRG_INFO *file,byte *record,int inx);
- extern int myrg_update(MYRG_INFO *file,const byte *old,byte *new_rec);
- extern int myrg_write(MYRG_INFO *info,byte *rec);
- extern int myrg_status(MYRG_INFO *file,MYMERGE_INFO *x,int flag);
- extern int myrg_lock_database(MYRG_INFO *file,int lock_type);
- extern int myrg_create(const char *name, const char **table_names,
- uint insert_method, my_bool fix_names);
- extern int myrg_extra(MYRG_INFO *file,enum ha_extra_function function,
- void *extra_arg);
- extern void myrg_extrafunc(MYRG_INFO *info,invalidator_by_filename inv);
- extern ha_rows myrg_records_in_range(MYRG_INFO *info,int inx,
- key_range *min_key, key_range *max_key);
- extern ulonglong myrg_position(MYRG_INFO *info);
- #ifdef __cplusplus
- }
- #endif
- #endif