myisamdef.h
上传用户:romrleung
上传日期:2022-05-23
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文件大小:30k
- /* Copyright (C) 2000,2004 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 fulltext_keys;
- uchar not_used; /* 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 HA_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;
- uchar version;
- } MI_PACK;
- typedef struct st_mi_isam_share { /* Shared between opens */
- MI_STATE_INFO state;
- MI_BASE_INFO base;
- MI_KEYDEF ft2_keyinfo; /* Second-level ft-key definition */
- MI_KEYDEF *keyinfo; /* Key definitions */
- MI_UNIQUEDEF *uniqueinfo; /* unique definitions */
- HA_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 */
- KEY_CACHE *key_cache; /* ref to the current key cache */
- 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 */
- uint unique_name_length;
- 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;
- 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;
- #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,*blob_end;
- 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;
- DYNAMIC_ARRAY *ft1_to_ft2; /* used only in ft1->ft2 conversion */
- char *filename; /* parameter to open filename */
- uchar *buff, /* Temp area for key */
- *lastkey,*lastkey2; /* Last used search key */
- uchar *first_mbr_key; /* Searhed spatial key */
- byte *rec_buff; /* Tempbuff for recordpack */
- uchar *int_keypos, /* Save position for next/previous */
- *int_maxpos; /* -""- */
- uint int_nod_flag; /* -""- */
- uint32 int_keytree_version; /* -""- */
- 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;
- /* QQ: the folloing two xxx_length fields should be removed,
- as they are not compatible with parallel repair */
- 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 */
- int lastinx; /* Last used index */
- uint lastkey_length; /* Length of key in lastkey */
- uint last_rkey_length; /* Last length in mi_rkey() */
- enum ha_rkey_function last_key_func; /* CONTAIN, OVERLAP, etc */
- uint save_lastkey_length;
- uint pack_key_length; /* For MYISAMMRG */
- 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;
- LIST open_list;
- IO_CACHE rec_cache; /* When cacheing records */
- uint preload_buff_size; /* When preloading indexes */
- 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 once_flags; /* For MYISAMMRG */
- #ifdef THREAD
- THR_LOCK_DATA lock;
- #endif
- uchar *rtree_recursion_state; /* For RTREE */
- int rtree_recursion_depth;
- };
- typedef struct st_buffpek {
- my_off_t file_pos; /* Where we are in the sort file */
- uchar *base,*key; /* Key pointers */
- ha_rows count; /* Number of rows in table */
- ulong mem_count; /* numbers of keys in memory */
- ulong max_keys; /* Max keys in buffert */
- } BUFFPEK;
- typedef struct st_mi_sort_param
- {
- pthread_t thr;
- IO_CACHE read_cache, tempfile, tempfile_for_exceptions;
- DYNAMIC_ARRAY buffpek;
-
- /*
- The next two are used to collect statistics, see update_key_parts for
- description.
- */
- ulonglong unique[MI_MAX_KEY_SEG+1];
- ulonglong notnull[MI_MAX_KEY_SEG+1];
- my_off_t pos,max_pos,filepos,start_recpos;
- uint key, key_length,real_key_length,sortbuff_size;
- uint maxbuffers, keys, find_length, sort_keys_length;
- my_bool fix_datafile, master;
- MI_KEYDEF *keyinfo;
- HA_KEYSEG *seg;
- SORT_INFO *sort_info;
- uchar **sort_keys;
- byte *rec_buff;
- void *wordlist, *wordptr;
- char *record;
- MY_TMPDIR *tmpdir;
- int (*key_cmp)(struct st_mi_sort_param *, const void *, const void *);
- int (*key_read)(struct st_mi_sort_param *,void *);
- int (*key_write)(struct st_mi_sort_param *, const void *);
- void (*lock_in_memory)(MI_CHECK *);
- NEAR int (*write_keys)(struct st_mi_sort_param *, register uchar **,
- uint , struct st_buffpek *, IO_CACHE *);
- NEAR uint (*read_to_buffer)(IO_CACHE *,struct st_buffpek *, uint);
- NEAR int (*write_key)(struct st_mi_sort_param *, IO_CACHE *,char *,
- uint, uint);
- } MI_SORT_PARAM;
- /* 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
- /* once_flags */
- #define USE_PACKED_KEYS 1
- #define RRND_PRESERVE_LASTINX 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_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_full_length_rdonly(length,key)
- { if ((uchar) *(key) != 255)
- length= ((uint) (uchar) *((key)))+1;
- else
- { length=mi_uint2korr((key)+1)+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 ha_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
- #define MI_MIN_ROWS_TO_DISABLE_INDEXES 100
- #define MI_MIN_ROWS_TO_USE_WRITE_CACHE 10
- /* 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_ck_real_write_btree(MI_INFO *info, MI_KEYDEF *keyinfo,
- uchar *key, uint key_length,
- my_off_t *root, uint comp_flag);
- extern int _mi_enlarge_root(MI_INFO *info,MI_KEYDEF *keyinfo,uchar *key, my_off_t *root);
- 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 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 ha_key_cmp(HA_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 uint _mi_keylength_part(MI_KEYDEF *keyinfo, register uchar *key,
- HA_KEYSEG *end);
- 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,
- int level,uchar *buff,int return_buffer);
- extern int _mi_write_keypage(MI_INFO *info,MI_KEYDEF *keyinfo,my_off_t page,
- int level, uchar *buff);
- extern int _mi_dispose(MI_INFO *info,MI_KEYDEF *keyinfo,my_off_t pos,
- int level);
- extern my_off_t _mi_new(MI_INFO *info,MI_KEYDEF *keyinfo,int level);
- 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, HA_KEYSEG **last_used_keyseg);
- 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,
- ulong packed_length, my_bool with_checkum);
- 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,HA_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 *, MI_BLOCK_INFO *, File, my_off_t);
- 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(uint version, byte *block_buff, ulong length);
- extern uint read_pack_length(uint version, const uchar *buf, ulong *length);
- extern uint calc_pack_length(uint version, 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 HA_KEYSEG *keyseg);
- char *mi_keyseg_read(char *ptr, HA_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);
- extern int mi_disable_indexes(MI_INFO *info);
- extern int mi_enable_indexes(MI_INFO *info);
- extern int mi_indexes_are_disabled(MI_INFO *info);
- 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);
- extern MI_INFO *test_if_reopen(char *filename);
- 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 */
- volatile my_bool *killed_ptr(MI_CHECK *param);
- 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 sort_ft_buf_flush(MI_SORT_PARAM *sort_param);
- int thr_write_keys(MI_SORT_PARAM *sort_param);
- #ifdef THREAD
- pthread_handler_decl(thr_find_all_keys,arg);
- #endif
- int flush_blocks(MI_CHECK *param, KEY_CACHE *key_cache, File file);
- int sort_write_record(MI_SORT_PARAM *sort_param);
- int _create_index_by_sort(MI_SORT_PARAM *info,my_bool no_messages, ulong);
- #ifdef __cplusplus
- }
- #endif