home
***
CD-ROM
|
disk
|
FTP
|
other
***
search
/
Chip 2001 January
/
Chip_2001-01_cd1.bin
/
tema
/
mysql
/
mysql-3.23.28g-win-source.exe
/
include
/
myisam.h
< prev
next >
Wrap
C/C++ Source or Header
|
2000-11-22
|
14KB
|
393 lines
/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public
License as published by the Free Software Foundation; either
version 2 of the License, or (at your option) any later version.
This library 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
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with this library; 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 myisam_funktions */
#ifndef _myisam_h
#define _myisam_h
#ifdef __cplusplus
extern "C" {
#endif
#ifndef _my_base_h
#include <my_base.h>
#endif
#ifndef _m_ctype_h
#include <m_ctype.h>
#endif
/* defines used by myisam-funktions */
/* The following defines can be increased if necessary */
#define MI_MAX_KEY 32 /* Max allowed keys */
#define MI_MAX_KEY_SEG 16 /* Max segments for key */
#define MI_MAX_KEY_LENGTH 500
#define MI_MAX_KEY_BUFF (MI_MAX_KEY_LENGTH+MI_MAX_KEY_SEG*6+8+8)
#define MI_MAX_POSSIBLE_KEY_BUFF (1024+6+6) /* For myisam_chk */
#define MI_MAX_POSSIBLE_KEY 64 /* For myisam_chk */
#define MI_MAX_MSG_BUF 1024 /* used in CHECK TABLE, REPAIR TABLE */
#define MI_NAME_IEXT ".MYI"
#define MI_NAME_DEXT ".MYD"
/* Max extra space to use when sorting keys */
#define MI_MAX_TEMP_LENGTH 256*1024L*1024L
#define mi_portable_sizeof_char_ptr 8
typedef uint32 ha_checksum;
/* Param to/from mi_info */
typedef struct st_mi_isaminfo /* Struct from h_info */
{
ha_rows records; /* Records in database */
ha_rows deleted; /* Deleted records in database */
my_off_t recpos; /* Pos for last used record */
my_off_t newrecpos; /* Pos if we write new record */
my_off_t dupp_key_pos; /* Position to record with dupp key */
my_off_t data_file_length, /* Length of data file */
max_data_file_length,
index_file_length,
max_index_file_length,
delete_length;
ulong reclength; /* Recordlength */
ulong mean_reclength; /* Mean recordlength (if packed) */
ulonglong auto_increment;
ulonglong key_map; /* Which keys are used */
uint keys; /* Number of keys in use */
uint options; /* HA_OPTIONS_... used */
int errkey, /* With key was dupplicated on err */
sortkey; /* clustered by this key */
File filenr; /* (uniq) filenr for datafile */
time_t create_time; /* When table was created */
time_t check_time;
time_t update_time;
uint reflength;
ulong record_offset;
ulong *rec_per_key; /* for sql optimizing */
uint raid_type,raid_chunks;
ulong raid_chunksize;
} MI_ISAMINFO;
typedef struct st_mi_create_info
{
ha_rows max_rows;
ha_rows reloc_rows;
ulonglong auto_increment;
ulonglong data_file_length;
uint raid_type,raid_chunks;
ulong raid_chunksize;
uint old_options;
uint8 language;
} MI_CREATE_INFO;
struct st_myisam_info; /* For referense */
typedef struct st_myisam_info MI_INFO;
typedef struct st_mi_keyseg /* Key-portion */
{
uint8 type; /* Type of key (for sort) */
uint8 language;
uint8 null_bit; /* bitmask to test for NULL */
uint8 bit_start,bit_end; /* if bit field */
uint16 flag;
uint16 length; /* Keylength */
uint32 start; /* Start of key in record */
uint32 null_pos; /* position to NULL indicator */
CHARSET_INFO *charset;
} MI_KEYSEG;
struct st_mi_s_param;
typedef struct st_mi_keydef /* Key definition with open & info */
{
uint16 keysegs; /* Number of key-segment */
uint16 flag; /* NOSAME, PACK_USED */
uint16 block_length; /* Length of keyblock (auto) */
uint16 underflow_block_length; /* When to execute underflow */
uint16 keylength; /* Tot length of keyparts (auto) */
uint16 minlength; /* min length of (packed) key (auto) */
uint16 maxlength; /* max length of (packed) key (auto) */
uint16 block_size; /* block_size (auto) */
uint32 version; /* For concurrent read/write */
MI_KEYSEG *seg,*end;
int (*bin_search)(struct st_myisam_info *info,struct st_mi_keydef *keyinfo,
uchar *page,uchar *key,
uint key_len,uint comp_flag,uchar * *ret_pos,
uchar *buff, my_bool *was_last_key);
uint (*get_key)(struct st_mi_keydef *keyinfo,uint nod_flag,uchar * *page,
uchar *key);
int (*pack_key)(struct st_mi_keydef *keyinfo,uint nod_flag,uchar *next_key,
uchar *org_key, uchar *prev_key, uchar *key,
struct st_mi_s_param *s_temp);
void (*store_key)(struct st_mi_keydef *keyinfo, uchar *key_pos,
struct st_mi_s_param *s_temp);
} MI_KEYDEF;
#define MI_UNIQUE_HASH_LENGTH 4
typedef struct st_unique_def /* Segment definition of unique */
{
uint16 keysegs; /* Number of key-segment */
uchar key; /* Mapped to which key */
uint8 null_are_equal;
MI_KEYSEG *seg,*end;
} MI_UNIQUEDEF;
typedef struct st_mi_decode_tree /* Decode huff-table */
{
uint16 *table;
uint quick_table_bits;
byte *intervalls;
} MI_DECODE_TREE;
struct st_mi_bit_buff;
/* Note that null markers should always be first in a row !
When creating a column, one should only specify:
type, length, null_bit and null_pos */
typedef struct st_columndef /* column information */
{
int16 type; /* en_fieldtype */
uint16 length; /* length of field */
uint32 offset; /* Offset to position in row */
uint8 null_bit; /* If column may be 0 */
uint16 null_pos; /* position for null marker */
#ifndef NOT_PACKED_DATABASES
void (*unpack)(struct st_columndef *rec,struct st_mi_bit_buff *buff,
uchar *start,uchar *end);
enum en_fieldtype base_type;
uint space_length_bits,pack_type;
MI_DECODE_TREE *huff_tree;
#endif
} MI_COLUMNDEF;
extern my_string myisam_log_filename; /* Name of logfile */
extern uint myisam_block_size;
extern my_bool myisam_flush,myisam_delay_key_write;
extern my_bool myisam_concurrent_insert;
extern my_off_t myisam_max_temp_length,myisam_max_extra_temp_length;
/* Prototypes for myisam-functions */
extern int mi_close(struct st_myisam_info *file);
extern int mi_delete(struct st_myisam_info *file,const byte *buff);
extern struct st_myisam_info *mi_open(const char *name,int mode,
uint wait_if_locked);
extern int mi_panic(enum ha_panic_function function);
extern int mi_rfirst(struct st_myisam_info *file,byte *buf,int inx);
extern int mi_rkey(struct st_myisam_info *file,byte *buf,int inx,
const byte *key,
uint key_len, enum ha_rkey_function search_flag);
extern int mi_rlast(struct st_myisam_info *file,byte *buf,int inx);
extern int mi_rnext(struct st_myisam_info *file,byte *buf,int inx);
extern int mi_rnext_same(struct st_myisam_info *info, byte *buf);
extern int mi_rprev(struct st_myisam_info *file,byte *buf,int inx);
extern int mi_rrnd(struct st_myisam_info *file,byte *buf, my_off_t pos);
extern int mi_scan_init(struct st_myisam_info *file);
extern int mi_scan(struct st_myisam_info *file,byte *buf);
extern int mi_rsame(struct st_myisam_info *file,byte *record,int inx);
extern int mi_rsame_with_pos(struct st_myisam_info *file,byte *record,
int inx, my_off_t pos);
extern int mi_update(struct st_myisam_info *file,const byte *old,
byte *new_record);
extern int mi_write(struct st_myisam_info *file,byte *buff);
extern my_off_t mi_position(struct st_myisam_info *file);
extern int mi_status(struct st_myisam_info *info, MI_ISAMINFO *x, uint flag);
extern int mi_lock_database(struct st_myisam_info *file,int lock_type);
extern int mi_create(const char *name,uint keys,MI_KEYDEF *keydef,
uint columns, MI_COLUMNDEF *columndef,
uint uniques, MI_UNIQUEDEF *uniquedef,
MI_CREATE_INFO *create_info, uint flags);
extern int mi_delete_table(const char *name);
extern int mi_rename(const char *from, const char *to);
extern int mi_extra(struct st_myisam_info *file,
enum ha_extra_function function);
extern ha_rows mi_records_in_range(struct st_myisam_info *info,int inx,
const byte *start_key,uint start_key_len,
enum ha_rkey_function start_search_flag,
const byte *end_key,uint end_key_len,
enum ha_rkey_function end_search_flag);
extern int mi_log(int activate_log);
extern int mi_is_changed(struct st_myisam_info *info);
extern int mi_delete_all_rows(struct st_myisam_info *info);
extern ulong _mi_calc_blob_length(uint length , const byte *pos);
extern uint mi_get_pointer_length(ulonglong file_length, uint def);
/* this is used to pass to mysql_myisamchk_table -- by Sasha Pachev */
#define MYISAMCHK_REPAIR 1 /* equivalent to myisamchk -r*/
#define MYISAMCHK_VERIFY 2 /* run equivalent of myisamchk -c,
* if corruption is detected, do myisamchk -r*/
/* definitions needed for myisamchk.c -- by Sasha Pachev */
#define T_VERBOSE 1
#define T_SILENT 2
#define T_DESCRIPT 4
#define T_EXTEND 8
#define T_INFO 16
#define T_REP 32
#define T_OPT 64 /* Not currently used */
#define T_FORCE_CREATE 128
#define T_WRITE_LOOP 256
#define T_UNPACK 512
#define T_STATISTICS 1024
#define T_VERY_SILENT 2048
#define T_SORT_RECORDS 4096
#define T_SORT_INDEX 8192
#define T_WAIT_FOREVER 16384
#define T_REP_BY_SORT 32768L
#define T_FAST 65536L
#define T_READONLY 131072L
#define T_MEDIUM T_READONLY*2
#define T_AUTO_INC T_MEDIUM*2
#define T_CHECK T_AUTO_INC*2
#define T_UPDATE_STATE T_CHECK*2
#define T_CHECK_ONLY_CHANGED T_UPDATE_STATE*2
#define T_DONT_CHECK_CHECKSUM T_CHECK_ONLY_CHANGED*2
#define T_TRUST_HEADER T_DONT_CHECK_CHECKSUM*2
#define T_CREATE_MISSING_KEYS T_TRUST_HEADER*2
#define T_SAFE_REPAIR T_CREATE_MISSING_KEYS*2
#define T_AUTO_REPAIR T_SAFE_REPAIR*2
#define T_BACKUP_DATA T_AUTO_REPAIR*2
#define O_NEW_INDEX 1 /* Bits set in out_flag */
#define O_NEW_DATA 2
#define O_DATA_LOST 4
/* these struct is used by my_check to tell it what to do */
typedef struct st_sort_key_blocks { /* Used when sorting */
uchar *buff,*end_pos;
uchar lastkey[MI_MAX_POSSIBLE_KEY_BUFF];
uint last_length;
int inited;
} SORT_KEY_BLOCKS;
struct st_mi_check_param;
typedef struct st_sort_info {
MI_INFO *info;
struct st_mi_check_param *param;
enum data_file_type new_data_file_type;
SORT_KEY_BLOCKS *key_block,*key_block_end;
uint key,find_length;
my_off_t pos,max_pos,filepos,start_recpos,filelength,dupp,buff_length;
ha_rows max_records;
ulonglong unique[MI_MAX_KEY_SEG+1];
my_bool fix_datafile;
char *record,*buff;
MI_KEYDEF *keyinfo;
MI_KEYSEG *keyseg;
} SORT_INFO;
typedef struct st_mi_check_param
{
ulonglong auto_increment_value;
ulonglong max_data_file_length;
ulonglong keys_in_use;
my_off_t search_after_block;
my_off_t new_file_pos,key_file_blocks;
my_off_t keydata,totaldata,key_blocks,start_check_pos;
ha_rows total_records,total_deleted;
ha_checksum record_checksum,glob_crc;
ulong use_buffers,read_buffer_length,write_buffer_length,
sort_buffer_length,sort_key_blocks;
uint out_flag,warning_printed,error_printed,
opt_rep_quick,verbose;
uint opt_sort_key,total_files,max_level;
uint testflag;
uint8 language;
my_bool using_global_keycache, opt_lock_memory, opt_follow_links;
my_bool retry_repair,retry_without_quick;
char temp_filename[FN_REFLEN],*isam_file_name,*tmpdir;
int tmpfile_createflag;
myf myf_rw;
IO_CACHE read_cache;
SORT_INFO sort_info;
ulonglong unique_count[MI_MAX_KEY_SEG+1];
ha_checksum key_crc[MI_MAX_POSSIBLE_KEY];
ulong rec_per_key_part[MI_MAX_KEY_SEG*MI_MAX_POSSIBLE_KEY];
void* thd;
char* table_name;
char* op_name;
} MI_CHECK;
typedef struct st_mi_sortinfo {
ha_rows max_records;
SORT_INFO *sort_info;
char *tmpdir;
int (*key_cmp)(SORT_INFO *info, const void *, const void *);
int (*key_read)(SORT_INFO *info,void *buff);
int (*key_write)(SORT_INFO *info, const void *buff);
void (*lock_in_memory)(MI_CHECK *info);
uint key_length;
myf myf_rw;
} MI_SORT_PARAM;
/* functions in mi_check */
void myisamchk_init(MI_CHECK *param);
int chk_status(MI_CHECK *param, MI_INFO *info);
int chk_del(MI_CHECK *param, register MI_INFO *info, uint test_flag);
int chk_size(MI_CHECK *param, MI_INFO *info);
int chk_key(MI_CHECK *param, MI_INFO *info);
int chk_data_link(MI_CHECK *param, MI_INFO *info,int extend);
int mi_repair(MI_CHECK *param, register MI_INFO *info,
my_string name, int rep_quick);
int mi_sort_index(MI_CHECK *param, register MI_INFO *info, my_string name);
int mi_repair_by_sort(MI_CHECK *param, register MI_INFO *info,
const char * name, int rep_quick);
int change_to_newfile(const char * filename, const char * old_ext,
const char * new_ext, uint raid_chunks,
myf myflags);
int lock_file(MI_CHECK *param, File file, my_off_t start, int lock_type,
const char *filetype, const char *filename);
void lock_memory(MI_CHECK *param);
int flush_blocks(MI_CHECK *param, File file);
void update_auto_increment_key(MI_CHECK *param, MI_INFO *info,
my_bool repair);
int update_state_info(MI_CHECK *param, MI_INFO *info,uint update);
int filecopy(MI_CHECK *param, File to,File from,my_off_t start,
my_off_t length, const char *type);
int movepoint(MI_INFO *info,byte *record,my_off_t oldpos,
my_off_t newpos, uint prot_key);
int sort_write_record(SORT_INFO *sort_info);
int write_data_suffix(MI_CHECK *param, MI_INFO *info);
int _create_index_by_sort(MI_SORT_PARAM *info,my_bool no_messages,
ulong);
int test_if_almost_full(MI_INFO *info);
int recreate_table(MI_CHECK *param, MI_INFO **org_info, char *filename);
void mi_disable_non_unique_index(MI_INFO *info, ha_rows rows);
my_bool mi_test_if_sort_rep(MI_INFO *info, ha_rows rows, my_bool force);
#ifdef __cplusplus
}
#endif
#endif