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mariadb/myisam/myisamdef.h
unknown b5e37b242e Don't count NULL values in cardinalty for MyISAM tables. 
Free row buffer cache after each query for MyISAM tables.
Added table join option FORCE INDEX
Fixed core dump bug when connecting with hostname that could not be resolved.


include/my_base.h:
  Don't count NULL values in cardinalty
myisam/mi_check.c:
  Don't count NULL values in cardinalty
myisam/mi_extra.c:
  Free row buffer cache after each query
myisam/mi_open.c:
  Avoid realloc if cache size doesn't change
myisam/mi_search.c:
  Don't count NULL values in cardinalty
myisam/myisamdef.h:
  Change buffer length from uint to uint32 to make it more portable/predictable
mysql-test/r/myisam.result:
  Test case for cardinality with NULL keys and FORCE INDEX
mysql-test/t/myisam.test:
  Test case for cardinality with NULL keys and FORCE INDEX
sql/lex.h:
  Added table join option FORCE INDEX
sql/mysql_priv.h:
  Added table join option FORCE INDEX
sql/opt_range.cc:
  Added table join option FORCE INDEX
sql/sql_base.cc:
  Added table join option FORCE INDEX
sql/sql_lex.h:
  Added table join option FORCE INDEX
sql/sql_parse.cc:
  Added table join option FORCE INDEX
  Don't use strlen() on hostname without first checking if it's not NULL
sql/sql_select.cc:
  Added table join option FORCE INDEX
sql/sql_yacc.yy:
  Added table join option FORCE INDEX
sql/table.h:
  Added table join option FORCE INDEX
2003-01-09 02:19:14 +02:00

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/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult 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 is included by all internal myisam files */
#include "myisam.h" /* Structs & some defines */
#include "myisampack.h" /* packing of keys */
#include <my_tree.h>
#ifdef THREAD
#include <my_pthread.h>
#include <thr_lock.h>
#else
#include <my_no_pthread.h>
#endif
#if defined(my_write) && !defined(MAP_TO_USE_RAID)
#undef my_write /* undef map from my_nosys; We need test-if-disk full */
#endif
typedef struct st_mi_status_info
{
ha_rows records; /* Rows in table */
ha_rows del; /* Removed rows */
my_off_t empty; /* lost space in datafile */
my_off_t key_empty; /* lost space in indexfile */
my_off_t key_file_length;
my_off_t data_file_length;
} MI_STATUS_INFO;
typedef struct st_mi_state_info
{
struct { /* Fileheader */
uchar file_version[4];
uchar options[2];
uchar header_length[2];
uchar state_info_length[2];
uchar base_info_length[2];
uchar base_pos[2];
uchar key_parts[2]; /* Key parts */
uchar unique_key_parts[2]; /* Key parts + unique parts */
uchar keys; /* number of keys in file */
uchar uniques; /* number of UNIQUE definitions */
uchar language; /* Language for indexes */
uchar max_block_size; /* max keyblock size */
uchar not_used[2]; /* To align to 8 */
} header;
MI_STATUS_INFO state;
ha_rows split; /* number of split blocks */
my_off_t dellink; /* Link to next removed block */
ulonglong auto_increment;
ulong process; /* process that updated table last */
ulong unique; /* Unique number for this process */
ulong update_count; /* Updated for each write lock */
ulong status;
ulong *rec_per_key_part;
my_off_t *key_root; /* Start of key trees */
my_off_t *key_del; /* delete links for trees */
my_off_t rec_per_key_rows; /* Rows when calculating rec_per_key */
ulong sec_index_changed; /* Updated when new sec_index */
ulong sec_index_used; /* which extra index are in use */
ulonglong key_map; /* Which keys are in use */
ha_checksum checksum;
ulong version; /* timestamp of create */
time_t create_time; /* Time when created database */
time_t recover_time; /* Time for last recover */
time_t check_time; /* Time for last check */
uint sortkey; /* sorted by this key (not used) */
uint open_count;
uint8 changed; /* Changed since myisamchk */
/* the following isn't saved on disk */
uint state_diff_length; /* Should be 0 */
uint state_length; /* Length of state header in file */
ulong *key_info;
} MI_STATE_INFO;
#define MI_STATE_INFO_SIZE (24+14*8+7*4+2*2+8)
#define MI_STATE_KEY_SIZE 8
#define MI_STATE_KEYBLOCK_SIZE 8
#define MI_STATE_KEYSEG_SIZE 4
#define MI_STATE_EXTRA_SIZE ((MI_MAX_KEY+MI_MAX_KEY_BLOCK_SIZE)*MI_STATE_KEY_SIZE + MI_MAX_KEY*MI_MAX_KEY_SEG*MI_STATE_KEYSEG_SIZE)
#define MI_KEYDEF_SIZE (2+ 5*2)
#define MI_UNIQUEDEF_SIZE (2+1+1)
#define MI_KEYSEG_SIZE (6+ 2*2 + 4*2)
#define MI_COLUMNDEF_SIZE (2*3+1)
#define MI_BASE_INFO_SIZE (5*8 + 8*4 + 4 + 4*2 + 16)
#define MI_INDEX_BLOCK_MARGIN 16 /* Safety margin for .MYI tables */
typedef struct st_mi_base_info
{
my_off_t keystart; /* Start of keys */
my_off_t max_data_file_length;
my_off_t max_key_file_length;
my_off_t margin_key_file_length;
ha_rows records,reloc; /* Create information */
ulong mean_row_length; /* Create information */
ulong reclength; /* length of unpacked record */
ulong pack_reclength; /* Length of full packed rec. */
ulong min_pack_length;
ulong max_pack_length; /* Max possibly length of packed rec.*/
ulong min_block_length;
ulong fields, /* fields in table */
pack_fields; /* packed fields in table */
uint rec_reflength; /* = 2-8 */
uint key_reflength; /* = 2-8 */
uint keys; /* same as in state.header */
uint auto_key; /* Which key-1 is a auto key */
uint blobs; /* Number of blobs */
uint pack_bits; /* Length of packed bits */
uint max_key_block_length; /* Max block length */
uint max_key_length; /* Max key length */
/* Extra allocation when using dynamic record format */
uint extra_alloc_bytes;
uint extra_alloc_procent;
/* Info about raid */
uint raid_type,raid_chunks;
ulong raid_chunksize;
/* The following are from the header */
uint key_parts,all_key_parts;
} MI_BASE_INFO;
/* Structs used intern in database */
typedef struct st_mi_blob /* Info of record */
{
ulong offset; /* Offset to blob in record */
uint pack_length; /* Type of packed length */
ulong length; /* Calc:ed for each record */
} MI_BLOB;
typedef struct st_mi_isam_pack {
ulong header_length;
uint ref_length;
} MI_PACK;
typedef struct st_mi_isam_share { /* Shared between opens */
MI_STATE_INFO state;
MI_BASE_INFO base;
MI_KEYDEF *keyinfo; /* Key definitions */
MI_UNIQUEDEF *uniqueinfo; /* unique definitions */
MI_KEYSEG *keyparts; /* key part info */
MI_COLUMNDEF *rec; /* Pointer to field information */
MI_PACK pack; /* Data about packed records */
MI_BLOB *blobs; /* Pointer to blobs */
char *unique_file_name; /* realpath() of index file */
char *data_file_name, /* Resolved path names from symlinks */
*index_file_name;
byte *file_map; /* mem-map of file if possible */
MI_DECODE_TREE *decode_trees;
uint16 *decode_tables;
int (*read_record)(struct st_myisam_info*, my_off_t, byte*);
int (*write_record)(struct st_myisam_info*, const byte*);
int (*update_record)(struct st_myisam_info*, my_off_t, const byte*);
int (*delete_record)(struct st_myisam_info*);
int (*read_rnd)(struct st_myisam_info*, byte*, my_off_t, my_bool);
int (*compare_record)(struct st_myisam_info*, const byte *);
ha_checksum (*calc_checksum)(struct st_myisam_info*, const byte *);
int (*compare_unique)(struct st_myisam_info*, MI_UNIQUEDEF *,
const byte *record, my_off_t pos);
invalidator_by_filename invalidator; /* query cache invalidator */
ulong this_process; /* processid */
ulong last_process; /* For table-change-check */
ulong last_version; /* Version on start */
ulong options; /* Options used */
ulong min_pack_length; /* Theese are used by packed data */
ulong max_pack_length;
ulong state_diff_length;
uint rec_reflength; /* rec_reflength in use now */
File kfile; /* Shared keyfile */
File data_file; /* Shared data file */
int mode; /* mode of file on open */
uint reopen; /* How many times reopened */
uint w_locks,r_locks,tot_locks; /* Number of read/write locks */
uint blocksize; /* blocksize of keyfile */
myf write_flag;
int rnd; /* rnd-counter */
enum data_file_type data_file_type;
my_bool changed, /* If changed since lock */
global_changed, /* If changed since open */
not_flushed,
temporary,delay_key_write,
concurrent_insert,
fulltext_index;
#ifdef THREAD
THR_LOCK lock;
pthread_mutex_t intern_lock; /* Locking for use with _locking */
rw_lock_t *key_root_lock;
#endif
} MYISAM_SHARE;
typedef uint mi_bit_type;
typedef struct st_mi_bit_buff { /* Used for packing of record */
mi_bit_type current_byte;
uint bits;
uchar *pos,*end,*blob_pos;
uint error;
} MI_BIT_BUFF;
struct st_myisam_info {
MYISAM_SHARE *s; /* Shared between open:s */
MI_STATUS_INFO *state,save_state;
MI_BLOB *blobs; /* Pointer to blobs */
MI_BIT_BUFF bit_buff;
/* accumulate indexfile changes between write's */
TREE *bulk_insert;
char *filename; /* parameter to open filename */
uchar *buff, /* Temp area for key */
*lastkey,*lastkey2; /* Last used search key */
byte *rec_buff; /* Tempbuff for recordpack */
uchar *int_keypos, /* Save position for next/previous */
*int_maxpos; /* -""- */
int (*read_record)(struct st_myisam_info*, my_off_t, byte*);
invalidator_by_filename invalidator; /* query cache invalidator */
ulong this_unique; /* uniq filenumber or thread */
ulong last_unique; /* last unique number */
ulong this_loop; /* counter for this open */
ulong last_loop; /* last used counter */
my_off_t lastpos, /* Last record position */
nextpos; /* Position to next record */
my_off_t save_lastpos;
my_off_t pos; /* Intern variable */
my_off_t last_keypage; /* Last key page read */
my_off_t last_search_keypage; /* Last keypage when searching */
my_off_t dupp_key_pos;
ha_checksum checksum;
ulong packed_length,blob_length; /* Length of found, packed record */
int dfile; /* The datafile */
uint opt_flag; /* Optim. for space/speed */
uint update; /* If file changed since open */
uint int_nod_flag; /* -""- */
int lastinx; /* Last used index */
uint lastkey_length; /* Length of key in lastkey */
uint last_rkey_length; /* Last length in mi_rkey() */
uint save_lastkey_length;
int errkey; /* Got last error on this key */
int lock_type; /* How database was locked */
int tmp_lock_type; /* When locked by readinfo */
uint data_changed; /* Somebody has changed data */
uint save_update; /* When using KEY_READ */
int save_lastinx;
uint32 int_keytree_version; /* -""- */
LIST open_list;
IO_CACHE rec_cache; /* When cacheing records */
myf lock_wait; /* is 0 or MY_DONT_WAIT */
my_bool was_locked; /* Was locked in panic */
my_bool quick_mode;
my_bool page_changed; /* If info->buff can't be used for rnext */
my_bool buff_used; /* If info->buff has to be reread for rnext */
my_bool use_packed_key; /* For MYISAMMRG */
#ifdef THREAD
THR_LOCK_DATA lock;
#endif
};
/* Some defines used by isam-funktions */
#define USE_WHOLE_KEY MI_MAX_KEY_BUFF*2 /* Use whole key in _mi_search() */
#define F_EXTRA_LCK -1
/* bits in opt_flag */
#define MEMMAP_USED 32
#define REMEMBER_OLD_POS 64
#define WRITEINFO_UPDATE_KEYFILE 1
#define WRITEINFO_NO_UNLOCK 2
/* bits in state.changed */
#define STATE_CHANGED 1
#define STATE_CRASHED 2
#define STATE_CRASHED_ON_REPAIR 4
#define STATE_NOT_ANALYZED 8
#define STATE_NOT_OPTIMIZED_KEYS 16
#define STATE_NOT_SORTED_PAGES 32
/* options to mi_read_cache */
#define READING_NEXT 1
#define READING_HEADER 2
#define mi_getint(x) ((uint) mi_uint2korr(x) & 32767)
#define mi_putint(x,y,nod) { uint16 boh=(nod ? (uint16) 32768 : 0) + (uint16) (y);\
mi_int2store(x,boh); }
#define mi_test_if_nod(x) (x[0] & 128 ? info->s->base.key_reflength : 0)
#define mi_mark_crashed(x) (x)->s->state.changed|=STATE_CRASHED
#define mi_mark_crashed_on_repair(x) { (x)->s->state.changed|=STATE_CRASHED|STATE_CRASHED_ON_REPAIR ; (x)->update|= HA_STATE_CHANGED; }
#define mi_is_crashed(x) ((x)->s->state.changed & STATE_CRASHED)
#define mi_is_crashed_on_repair(x) ((x)->s->state.changed & STATE_CRASHED_ON_REPAIR)
/* Functions to store length of space packed keys, VARCHAR or BLOB keys */
#define store_key_length_inc(key,length) \
{ if ((length) < 255) \
{ *(key)++=(length); } \
else \
{ *(key)=255; mi_int2store((key)+1,(length)); (key)+=3; } \
}
#define store_key_length(key,length) \
{ if ((length) < 255) \
{ *(key)=(length); } \
else \
{ *(key)=255; mi_int2store((key)+1,(length)); } \
}
#define get_key_length(length,key) \
{ if ((uchar) *(key) != 255) \
length= (uint) (uchar) *((key)++); \
else \
{ length=mi_uint2korr((key)+1); (key)+=3; } \
}
#define get_key_full_length(length,key) \
{ if ((uchar) *(key) != 255) \
length= ((uint) (uchar) *((key)++))+1; \
else \
{ length=mi_uint2korr((key)+1)+3; (key)+=3; } \
}
#define get_key_pack_length(length,length_pack,key) \
{ if ((uchar) *(key) != 255) \
{ length= (uint) (uchar) *((key)++); length_pack=1; }\
else \
{ length=mi_uint2korr((key)+1); (key)+=3; length_pack=3; } \
}
#define get_pack_length(length) ((length) >= 255 ? 3 : 1)
#define MI_MIN_BLOCK_LENGTH 20 /* Because of delete-link */
#define MI_EXTEND_BLOCK_LENGTH 20 /* Don't use to small record-blocks */
#define MI_SPLIT_LENGTH ((MI_EXTEND_BLOCK_LENGTH+4)*2)
#define MI_MAX_DYN_BLOCK_HEADER 20 /* Max prefix of record-block */
#define MI_BLOCK_INFO_HEADER_LENGTH 20
#define MI_DYN_DELETE_BLOCK_HEADER 20 /* length of delete-block-header */
#define MI_DYN_MAX_BLOCK_LENGTH ((1L << 24)-4L)
#define MI_DYN_MAX_ROW_LENGTH (MI_DYN_MAX_BLOCK_LENGTH - MI_SPLIT_LENGTH)
#define MI_DYN_ALIGN_SIZE 4 /* Align blocks on this */
#define MI_MAX_DYN_HEADER_BYTE 13 /* max header byte for dynamic rows */
#define MI_MAX_BLOCK_LENGTH ((((ulong) 1 << 24)-1) & (~ (ulong) (MI_DYN_ALIGN_SIZE-1)))
#define MI_REC_BUFF_OFFSET ALIGN_SIZE(MI_DYN_DELETE_BLOCK_HEADER+sizeof(uint32))
#define MEMMAP_EXTRA_MARGIN 7 /* Write this as a suffix for file */
#define PACK_TYPE_SELECTED 1 /* Bits in field->pack_type */
#define PACK_TYPE_SPACE_FIELDS 2
#define PACK_TYPE_ZERO_FILL 4
#define MI_FOUND_WRONG_KEY 32738 /* Impossible value from _mi_key_cmp */
#define MI_MAX_KEY_BLOCK_SIZE (MI_MAX_KEY_BLOCK_LENGTH/MI_MIN_KEY_BLOCK_LENGTH)
#define MI_BLOCK_SIZE(key_length,data_pointer,key_pointer) ((((key_length+data_pointer+key_pointer)*4+key_pointer+2)/myisam_block_size+1)*myisam_block_size)
#define MI_MAX_KEYPTR_SIZE 5 /* For calculating block lengths */
#define MI_MIN_KEYBLOCK_LENGTH 50 /* When to split delete blocks */
#define MI_MIN_SIZE_BULK_INSERT_TREE 16384 /* this is per key */
#define MI_MIN_ROWS_TO_USE_BULK_INSERT 100
/* The UNIQUE check is done with a hashed long key */
#define MI_UNIQUE_HASH_TYPE HA_KEYTYPE_ULONG_INT
#define mi_unique_store(A,B) mi_int4store((A),(B))
#ifdef THREAD
extern pthread_mutex_t THR_LOCK_myisam;
#endif
#if !defined(THREAD) || defined(DONT_USE_RW_LOCKS)
#define rw_wrlock(A) {}
#define rw_rdlock(A) {}
#define rw_unlock(A) {}
#endif
/* Some extern variables */
extern LIST *myisam_open_list;
extern uchar NEAR myisam_file_magic[],NEAR myisam_pack_file_magic[];
extern uint NEAR myisam_read_vec[],NEAR myisam_readnext_vec[];
extern uint myisam_quick_table_bits;
extern File myisam_log_file;
extern ulong myisam_pid;
/* This is used by _mi_calc_xxx_key_length och _mi_store_key */
typedef struct st_mi_s_param
{
uint ref_length,key_length,
n_ref_length,
n_length,
totlength,
part_of_prev_key,prev_length,pack_marker;
uchar *key, *prev_key,*next_key_pos;
bool store_not_null;
} MI_KEY_PARAM;
/* Prototypes for intern functions */
extern int _mi_read_dynamic_record(MI_INFO *info,my_off_t filepos,byte *buf);
extern int _mi_write_dynamic_record(MI_INFO*, const byte*);
extern int _mi_update_dynamic_record(MI_INFO*, my_off_t, const byte*);
extern int _mi_delete_dynamic_record(MI_INFO *info);
extern int _mi_cmp_dynamic_record(MI_INFO *info,const byte *record);
extern int _mi_read_rnd_dynamic_record(MI_INFO *, byte *,my_off_t, my_bool);
extern int _mi_write_blob_record(MI_INFO*, const byte*);
extern int _mi_update_blob_record(MI_INFO*, my_off_t, const byte*);
extern int _mi_read_static_record(MI_INFO *info, my_off_t filepos,byte *buf);
extern int _mi_write_static_record(MI_INFO*, const byte*);
extern int _mi_update_static_record(MI_INFO*, my_off_t, const byte*);
extern int _mi_delete_static_record(MI_INFO *info);
extern int _mi_cmp_static_record(MI_INFO *info,const byte *record);
extern int _mi_read_rnd_static_record(MI_INFO*, byte *,my_off_t, my_bool);
extern int _mi_ck_write(MI_INFO *info,uint keynr,uchar *key,uint length);
extern int _mi_enlarge_root(MI_INFO *info,uint keynr,uchar *key);
extern int _mi_insert(MI_INFO *info,MI_KEYDEF *keyinfo,uchar *key,
uchar *anc_buff,uchar *key_pos,uchar *key_buff,
uchar *father_buff, uchar *father_keypos,
my_off_t father_page, my_bool insert_last);
extern int _mi_split_page(MI_INFO *info,MI_KEYDEF *keyinfo,uchar *key,
uchar *buff,uchar *key_buff, my_bool insert_last);
extern uchar *_mi_find_half_pos(uint nod_flag,MI_KEYDEF *keyinfo,uchar *page,
uchar *key,uint *return_key_length,
uchar **after_key);
extern int _mi_calc_static_key_length(MI_KEYDEF *keyinfo,uint nod_flag,
uchar *key_pos, uchar *org_key,
uchar *key_buff,
uchar *key, MI_KEY_PARAM *s_temp);
extern int _mi_calc_var_key_length(MI_KEYDEF *keyinfo,uint nod_flag,
uchar *key_pos, uchar *org_key,
uchar *key_buff,
uchar *key, MI_KEY_PARAM *s_temp);
extern int _mi_calc_var_pack_key_length(MI_KEYDEF *keyinfo,uint nod_flag,
uchar *key_pos, uchar *org_key,
uchar *prev_key,
uchar *key, MI_KEY_PARAM *s_temp);
extern int _mi_calc_bin_pack_key_length(MI_KEYDEF *keyinfo,uint nod_flag,
uchar *key_pos,uchar *org_key,
uchar *prev_key,
uchar *key, MI_KEY_PARAM *s_temp);
void _mi_store_static_key(MI_KEYDEF *keyinfo, uchar *key_pos,
MI_KEY_PARAM *s_temp);
void _mi_store_var_pack_key(MI_KEYDEF *keyinfo, uchar *key_pos,
MI_KEY_PARAM *s_temp);
#ifdef NOT_USED
void _mi_store_pack_key(MI_KEYDEF *keyinfo, uchar *key_pos,
MI_KEY_PARAM *s_temp);
#endif
void _mi_store_bin_pack_key(MI_KEYDEF *keyinfo, uchar *key_pos,
MI_KEY_PARAM *s_temp);
extern int _mi_ck_delete(MI_INFO *info,uint keynr,uchar *key,uint key_length);
extern int _mi_readinfo(MI_INFO *info,int lock_flag,int check_keybuffer);
extern int _mi_writeinfo(MI_INFO *info,uint options);
extern int _mi_test_if_changed(MI_INFO *info);
extern int _mi_mark_file_changed(MI_INFO *info);
extern int _mi_decrement_open_count(MI_INFO *info);
extern int _mi_check_index(MI_INFO *info,int inx);
extern int _mi_search(MI_INFO *info,MI_KEYDEF *keyinfo,uchar *key,uint key_len,
uint nextflag,my_off_t pos);
extern int _mi_bin_search(struct st_myisam_info *info,MI_KEYDEF *keyinfo,
uchar *page,uchar *key,uint key_len,uint comp_flag,
uchar * *ret_pos,uchar *buff, my_bool *was_last_key);
extern int _mi_seq_search(MI_INFO *info,MI_KEYDEF *keyinfo,uchar *page,
uchar *key,uint key_len,uint comp_flag,
uchar **ret_pos,uchar *buff, my_bool *was_last_key);
extern int _mi_prefix_search(MI_INFO *info,MI_KEYDEF *keyinfo,uchar *page,
uchar *key,uint key_len,uint comp_flag,
uchar **ret_pos,uchar *buff, my_bool *was_last_key);
extern int _mi_compare_text(CHARSET_INFO *, uchar *, uint, uchar *, uint ,
my_bool);
extern my_off_t _mi_kpos(uint nod_flag,uchar *after_key);
extern void _mi_kpointer(MI_INFO *info,uchar *buff,my_off_t pos);
extern my_off_t _mi_dpos(MI_INFO *info, uint nod_flag,uchar *after_key);
extern my_off_t _mi_rec_pos(MYISAM_SHARE *info, uchar *ptr);
extern void _mi_dpointer(MI_INFO *info, uchar *buff,my_off_t pos);
extern int _mi_key_cmp(MI_KEYSEG *keyseg, uchar *a,uchar *b,
uint key_length,uint nextflag,uint *diff_length);
extern uint _mi_get_static_key(MI_KEYDEF *keyinfo,uint nod_flag,uchar * *page,
uchar *key);
extern uint _mi_get_pack_key(MI_KEYDEF *keyinfo,uint nod_flag,uchar * *page,
uchar *key);
extern uint _mi_get_binary_pack_key(MI_KEYDEF *keyinfo, uint nod_flag,
uchar **page_pos, uchar *key);
extern uchar *_mi_get_last_key(MI_INFO *info,MI_KEYDEF *keyinfo,uchar *keypos,
uchar *lastkey,uchar *endpos,
uint *return_key_length);
extern uchar *_mi_get_key(MI_INFO *info, MI_KEYDEF *keyinfo, uchar *page,
uchar *key, uchar *keypos, uint *return_key_length);
extern uint _mi_keylength(MI_KEYDEF *keyinfo,uchar *key);
extern uchar *_mi_move_key(MI_KEYDEF *keyinfo,uchar *to,uchar *from);
extern int _mi_search_next(MI_INFO *info,MI_KEYDEF *keyinfo,uchar *key,
uint key_length,uint nextflag,my_off_t pos);
extern int _mi_search_first(MI_INFO *info,MI_KEYDEF *keyinfo,my_off_t pos);
extern int _mi_search_last(MI_INFO *info,MI_KEYDEF *keyinfo,my_off_t pos);
extern uchar *_mi_fetch_keypage(MI_INFO *info,MI_KEYDEF *keyinfo,my_off_t page,
uchar *buff,int return_buffer);
extern int _mi_write_keypage(MI_INFO *info,MI_KEYDEF *keyinfo,my_off_t page,
uchar *buff);
extern int _mi_dispose(MI_INFO *info,MI_KEYDEF *keyinfo,my_off_t pos);
extern my_off_t _mi_new(MI_INFO *info,MI_KEYDEF *keyinfo);
extern uint _mi_make_key(MI_INFO *info,uint keynr,uchar *key,
const byte *record,my_off_t filepos);
extern uint _mi_pack_key(MI_INFO *info,uint keynr,uchar *key,uchar *old,
uint key_length);
extern int _mi_read_key_record(MI_INFO *info,my_off_t filepos,byte *buf);
extern int _mi_read_cache(IO_CACHE *info,byte *buff,my_off_t pos,
uint length,int re_read_if_possibly);
extern void update_auto_increment(MI_INFO *info,const byte *record);
extern byte *mi_alloc_rec_buff(MI_INFO *,ulong, byte**);
#define mi_get_rec_buff_ptr(info,buf) \
((((info)->s->options & HA_OPTION_PACK_RECORD) && (buf)) ? \
(buf) - MI_REC_BUFF_OFFSET : (buf))
#define mi_get_rec_buff_len(info,buf) \
(*((uint32 *)(mi_get_rec_buff_ptr(info,buf))))
extern ulong _mi_rec_unpack(MI_INFO *info,byte *to,byte *from,
ulong reclength);
extern my_bool _mi_rec_check(MI_INFO *info,const char *record, byte *packpos);
extern int _mi_write_part_record(MI_INFO *info,my_off_t filepos,ulong length,
my_off_t next_filepos,byte **record,
ulong *reclength,int *flag);
extern void _mi_print_key(FILE *stream,MI_KEYSEG *keyseg,const uchar *key,
uint length);
extern my_bool _mi_read_pack_info(MI_INFO *info,pbool fix_keys);
extern int _mi_read_pack_record(MI_INFO *info,my_off_t filepos,byte *buf);
extern int _mi_read_rnd_pack_record(MI_INFO*, byte *,my_off_t, my_bool);
extern int _mi_pack_rec_unpack(MI_INFO *info,byte *to,byte *from,
ulong reclength);
extern ulonglong mi_safe_mul(ulonglong a,ulonglong b);
extern int _mi_ft_update(MI_INFO *info, uint keynr, byte *keybuf,
const byte *oldrec, const byte *newrec, my_off_t pos);
struct st_sort_info;
typedef struct st_mi_block_info { /* Parameter to _mi_get_block_info */
uchar header[MI_BLOCK_INFO_HEADER_LENGTH];
ulong rec_len;
ulong data_len;
ulong block_len;
ulong blob_len;
my_off_t filepos;
my_off_t next_filepos;
my_off_t prev_filepos;
uint second_read;
uint offset;
} MI_BLOCK_INFO;
/* bits in return from _mi_get_block_info */
#define BLOCK_FIRST 1
#define BLOCK_LAST 2
#define BLOCK_DELETED 4
#define BLOCK_ERROR 8 /* Wrong data */
#define BLOCK_SYNC_ERROR 16 /* Right data at wrong place */
#define BLOCK_FATAL_ERROR 32 /* hardware-error */
#define NEED_MEM ((uint) 10*4*(IO_SIZE+32)+32) /* Nead for recursion */
#define MAXERR 20
#define BUFFERS_WHEN_SORTING 16 /* Alloc for sort-key-tree */
#define WRITE_COUNT MY_HOW_OFTEN_TO_WRITE
#define INDEX_TMP_EXT ".TMM"
#define DATA_TMP_EXT ".TMD"
#define UPDATE_TIME 1
#define UPDATE_STAT 2
#define UPDATE_SORT 4
#define UPDATE_AUTO_INC 8
#define UPDATE_OPEN_COUNT 16
#define USE_BUFFER_INIT (((1024L*512L-MALLOC_OVERHEAD)/IO_SIZE)*IO_SIZE)
#define READ_BUFFER_INIT (1024L*256L-MALLOC_OVERHEAD)
#define SORT_BUFFER_INIT (2048L*1024L-MALLOC_OVERHEAD)
#define MIN_SORT_BUFFER (4096-MALLOC_OVERHEAD)
enum myisam_log_commands {
MI_LOG_OPEN,MI_LOG_WRITE,MI_LOG_UPDATE,MI_LOG_DELETE,MI_LOG_CLOSE,MI_LOG_EXTRA,MI_LOG_LOCK,MI_LOG_DELETE_ALL
};
#define myisam_log(a,b,c,d) if (myisam_log_file >= 0) _myisam_log(a,b,c,d)
#define myisam_log_command(a,b,c,d,e) if (myisam_log_file >= 0) _myisam_log_command(a,b,c,d,e)
#define myisam_log_record(a,b,c,d,e) if (myisam_log_file >= 0) _myisam_log_record(a,b,c,d,e)
#define fast_mi_writeinfo(INFO) if (!(INFO)->s->tot_locks) (void) _mi_writeinfo((INFO),0)
#define fast_mi_readinfo(INFO) ((INFO)->lock_type == F_UNLCK) && _mi_readinfo((INFO),F_RDLCK,1)
#ifdef __cplusplus
extern "C" {
#endif
extern uint _mi_get_block_info(MI_BLOCK_INFO *,File, my_off_t);
extern uint _mi_rec_pack(MI_INFO *info,byte *to,const byte *from);
extern uint _mi_pack_get_block_info(MI_INFO *mysql, MI_BLOCK_INFO *, File,
my_off_t, char *rec_buf);
extern void _my_store_blob_length(byte *pos,uint pack_length,uint length);
extern void _myisam_log(enum myisam_log_commands command,MI_INFO *info,
const byte *buffert,uint length);
extern void _myisam_log_command(enum myisam_log_commands command,
MI_INFO *info, const byte *buffert,
uint length, int result);
extern void _myisam_log_record(enum myisam_log_commands command,MI_INFO *info,
const byte *record,my_off_t filepos,
int result);
extern my_bool _mi_memmap_file(MI_INFO *info);
extern void _mi_unmap_file(MI_INFO *info);
extern uint save_pack_length(byte *block_buff,ulong length);
uint mi_state_info_write(File file, MI_STATE_INFO *state, uint pWrite);
char *mi_state_info_read(char *ptr, MI_STATE_INFO *state);
uint mi_state_info_read_dsk(File file, MI_STATE_INFO *state, my_bool pRead);
uint mi_base_info_write(File file, MI_BASE_INFO *base);
char *my_n_base_info_read(char *ptr, MI_BASE_INFO *base);
int mi_keyseg_write(File file, const MI_KEYSEG *keyseg);
char *mi_keyseg_read(char *ptr, MI_KEYSEG *keyseg);
uint mi_keydef_write(File file, MI_KEYDEF *keydef);
char *mi_keydef_read(char *ptr, MI_KEYDEF *keydef);
uint mi_uniquedef_write(File file, MI_UNIQUEDEF *keydef);
char *mi_uniquedef_read(char *ptr, MI_UNIQUEDEF *keydef);
uint mi_recinfo_write(File file, MI_COLUMNDEF *recinfo);
char *mi_recinfo_read(char *ptr, MI_COLUMNDEF *recinfo);
ulong _my_calc_total_blob_length(MI_INFO *info, const byte *record);
ha_checksum mi_checksum(MI_INFO *info, const byte *buf);
ha_checksum mi_static_checksum(MI_INFO *info, const byte *buf);
my_bool mi_check_unique(MI_INFO *info, MI_UNIQUEDEF *def, byte *record,
ha_checksum unique_hash, my_off_t pos);
ha_checksum mi_unique_hash(MI_UNIQUEDEF *def, const byte *buf);
int _mi_cmp_static_unique(MI_INFO *info, MI_UNIQUEDEF *def,
const byte *record, my_off_t pos);
int _mi_cmp_dynamic_unique(MI_INFO *info, MI_UNIQUEDEF *def,
const byte *record, my_off_t pos);
int mi_unique_comp(MI_UNIQUEDEF *def, const byte *a, const byte *b,
my_bool null_are_equal);
void mi_get_status(void* param);
void mi_update_status(void* param);
void mi_copy_status(void* to,void *from);
my_bool mi_check_status(void* param);
void mi_disable_non_unique_index(MI_INFO *info, ha_rows rows);
my_bool check_table_is_closed(const char *name, const char *where);
int mi_open_datafile(MI_INFO *info, MYISAM_SHARE *share, File file_to_dup);
int mi_open_keyfile(MYISAM_SHARE *share);
void mi_setup_functions(register MYISAM_SHARE *share);
/* Functions needed by mi_check */
void mi_check_print_error _VARARGS((MI_CHECK *param, const char *fmt,...));
void mi_check_print_warning _VARARGS((MI_CHECK *param, const char *fmt,...));
void mi_check_print_info _VARARGS((MI_CHECK *param, const char *fmt,...));
int flush_pending_blocks(MI_SORT_PARAM *param);
int thr_write_keys(MI_SORT_PARAM *sort_param);
#ifdef THREAD
pthread_handler_decl(thr_find_all_keys,arg);
#endif
#ifdef __cplusplus
}
#endif
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