dep/mysqllite/include/myisammrg.h

   1 /* Copyright (C) 2000 MySQL AB
   2
   3    This program is free software; you can redistribute it and/or modify
   4    it under the terms of the GNU General Public License as published by
   5    the Free Software Foundation; version 2 of the License.
   6
   7    This program is distributed in the hope that it will be useful,
   8    but WITHOUT ANY WARRANTY; without even the implied warranty of
   9    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  10    GNU General Public License for more details.
  11
  12    You should have received a copy of the GNU General Public License
  13    along with this program; if not, write to the Free Software
  14    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
  15
  16 /* This file should be included when using merge_isam_funktions */
  17
  18 #ifndef _myisammrg_h
  19 #define _myisammrg_h
  20 #ifdef  __cplusplus
  21 extern "C" {
  22 #endif
  23
  24 #ifndef _my_base_h
  25 #include <my_base.h>
  26 #endif
  27 #ifndef _myisam_h
  28 #include <myisam.h>
  29 #endif
  30
  31 #include <queues.h>
  32
  33 #define MYRG_NAME_EXT   ".MRG"
  34
  35 /* In which table to INSERT rows */
  36 #define MERGE_INSERT_DISABLED   0
  37 #define MERGE_INSERT_TO_FIRST   1
  38 #define MERGE_INSERT_TO_LAST    2
  39
  40 extern TYPELIB merge_insert_method;
  41
  42         /* Param to/from myrg_info */
  43
  44 typedef struct st_mymerge_info          /* Struct from h_info */
  45 {
  46   ulonglong records;                    /* Records in database */
  47   ulonglong deleted;                    /* Deleted records in database */
  48   ulonglong recpos;                     /* Pos for last used record */
  49   ulonglong data_file_length;
  50   ulonglong dupp_key_pos;               /* Offset of the Duplicate key in the merge table */
  51   uint  reclength;                      /* Recordlength */
  52   int   errkey;                         /* With key was dupplicated on err */
  53   uint  options;                        /* HA_OPTION_... used */
  54   ulong *rec_per_key;                   /* for sql optimizing */
  55 } MYMERGE_INFO;
  56
  57 typedef struct st_myrg_table_info
  58 {
  59   struct st_myisam_info *table;
  60   ulonglong file_offset;
  61 } MYRG_TABLE;
  62
  63 typedef struct st_myrg_info
  64 {
  65   MYRG_TABLE *open_tables,*current_table,*end_table,*last_used_table;
  66   ulonglong records;                    /* records in tables */
  67   ulonglong del;                        /* Removed records */
  68   ulonglong data_file_length;
  69   ulong  cache_size;
  70   uint   merge_insert_method;
  71   uint   tables,options,reclength,keys;
  72   my_bool cache_in_use;
  73   /* If MERGE children attached to parent. See top comment in ha_myisammrg.cc */
  74   my_bool children_attached;
  75   LIST   open_list;
  76   QUEUE  by_key;
  77   ulong *rec_per_key_part;                      /* for sql optimizing */
  78   pthread_mutex_t mutex;
  79 } MYRG_INFO;
  80
  81
  82         /* Prototypes for merge-functions */
  83
  84 extern int myrg_close(MYRG_INFO *file);
  85 extern int myrg_delete(MYRG_INFO *file,const uchar *buff);
  86 extern MYRG_INFO *myrg_open(const char *name,int mode,int wait_if_locked);
  87 extern MYRG_INFO *myrg_parent_open(const char *parent_name,
  88                                    int (*callback)(void*, const char*),
  89                                    void *callback_param);
  90 extern int myrg_attach_children(MYRG_INFO *m_info, int handle_locking,
  91                                 MI_INFO *(*callback)(void*),
  92                                 void *callback_param,
  93                                 my_bool *need_compat_check);
  94 extern int myrg_detach_children(MYRG_INFO *m_info);
  95 extern int myrg_panic(enum ha_panic_function function);
  96 extern int myrg_rfirst(MYRG_INFO *file,uchar *buf,int inx);
  97 extern int myrg_rlast(MYRG_INFO *file,uchar *buf,int inx);
  98 extern int myrg_rnext(MYRG_INFO *file,uchar *buf,int inx);
  99 extern int myrg_rprev(MYRG_INFO *file,uchar *buf,int inx);
 100 extern int myrg_rnext_same(MYRG_INFO *file,uchar *buf);
 101 extern int myrg_rkey(MYRG_INFO *info,uchar *buf,int inx, const uchar *key,
 102                      key_part_map keypart_map, enum ha_rkey_function search_flag);
 103 extern int myrg_rrnd(MYRG_INFO *file,uchar *buf,ulonglong pos);
 104 extern int myrg_rsame(MYRG_INFO *file,uchar *record,int inx);
 105 extern int myrg_update(MYRG_INFO *file,const uchar *old,uchar *new_rec);
 106 extern int myrg_write(MYRG_INFO *info,uchar *rec);
 107 extern int myrg_status(MYRG_INFO *file,MYMERGE_INFO *x,int flag);
 108 extern int myrg_lock_database(MYRG_INFO *file,int lock_type);
 109 extern int myrg_create(const char *name, const char **table_names,
 110                        uint insert_method, my_bool fix_names);
 111 extern int myrg_extra(MYRG_INFO *file,enum ha_extra_function function,
 112                       void *extra_arg);
 113 extern int myrg_reset(MYRG_INFO *info);
 114 extern void myrg_extrafunc(MYRG_INFO *info,invalidator_by_filename inv);
 115 extern ha_rows myrg_records_in_range(MYRG_INFO *info, int inx,
 116                                      key_range *min_key, key_range *max_key);
 117 extern ha_rows myrg_records(MYRG_INFO *info);
 118
 119 extern ulonglong myrg_position(MYRG_INFO *info);
 120 #ifdef  __cplusplus
 121 }
 122 #endif
 123 #endif