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myisam.h
/* Copyright (c) 2000, 2013, Oracle and/or its affiliates. Copyright (c) 2009, 2013, Monty Program 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; version 2 of the License. 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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */ /* This file should be included when using myisam_functions */ #ifndef _myisam_h #define _myisam_h #ifdef __cplusplus extern "C" { #endif #include <my_base.h> #include <m_ctype.h> #include "keycache.h" #include "my_compare.h" #include <myisamchk.h> #include <mysql/plugin.h> #include <my_check_opt.h> /* Limit max keys according to HA_MAX_POSSIBLE_KEY; See myisamchk.h for details */ #if MAX_INDEXES > HA_MAX_POSSIBLE_KEY #define MI_MAX_KEY HA_MAX_POSSIBLE_KEY /* Max allowed keys */ #else #define MI_MAX_KEY MAX_INDEXES /* Max allowed keys */ #endif #define MI_MAX_POSSIBLE_KEY_BUFF HA_MAX_POSSIBLE_KEY_BUFF /* The following defines can be increased if necessary. But beware the dependency of MI_MAX_POSSIBLE_KEY_BUFF and MI_MAX_KEY_LENGTH. */ #define MI_MAX_KEY_LENGTH 1000 /* Max length in bytes */ #define MI_MAX_KEY_SEG 16 /* Max segments for key */ #define MI_NAME_IEXT ".MYI" #define MI_NAME_DEXT ".MYD" /* Possible values for myisam_block_size (must be power of 2) */ #define MI_KEY_BLOCK_LENGTH 1024 /* default key block length */ #define MI_MIN_KEY_BLOCK_LENGTH 1024 /* Min key block length */ #define MI_MAX_KEY_BLOCK_LENGTH 16384 /* In the following macros '_keyno_' is 0 .. keys-1. If there can be more keys than bits in the key_map, the highest bit is for all upper keys. They cannot be switched individually. This means that clearing of high keys is ignored, setting one high key sets all high keys. */ #define MI_KEYMAP_BITS (8 * SIZEOF_LONG_LONG) #define MI_KEYMAP_HIGH_MASK (1ULL << (MI_KEYMAP_BITS - 1)) #define mi_get_mask_all_keys_active(_keys_) \ (((_keys_) < MI_KEYMAP_BITS) ? \ ((1ULL << (_keys_)) - 1ULL) : \ (~ 0ULL)) #if MI_MAX_KEY > MI_KEYMAP_BITS #define mi_is_key_active(_keymap_,_keyno_) \ (((_keyno_) < MI_KEYMAP_BITS) ? \ MY_TEST((_keymap_) & (1ULL << (_keyno_))) : \ MY_TEST((_keymap_) & MI_KEYMAP_HIGH_MASK)) #define mi_set_key_active(_keymap_,_keyno_) \ (_keymap_)|= (((_keyno_) < MI_KEYMAP_BITS) ? \ (1ULL << (_keyno_)) : \ MI_KEYMAP_HIGH_MASK) #define mi_clear_key_active(_keymap_,_keyno_) \ (_keymap_)&= (((_keyno_) < MI_KEYMAP_BITS) ? \ (~ (1ULL << (_keyno_))) : \ (~ (0ULL)) /*ignore*/ ) #else #define mi_is_key_active(_keymap_,_keyno_) \ MY_TEST((_keymap_) & (1ULL << (_keyno_))) #define mi_set_key_active(_keymap_,_keyno_) \ (_keymap_)|= (1ULL << (_keyno_)) #define mi_clear_key_active(_keymap_,_keyno_) \ (_keymap_)&= (~ (1ULL << (_keyno_))) #endif #define mi_is_any_key_active(_keymap_) \ MY_TEST((_keymap_)) #define mi_is_all_keys_active(_keymap_,_keys_) \ ((_keymap_) == mi_get_mask_all_keys_active(_keys_)) #define mi_set_all_keys_active(_keymap_,_keys_) \ (_keymap_)= mi_get_mask_all_keys_active(_keys_) #define mi_clear_all_keys_active(_keymap_) \ (_keymap_)= 0 #define mi_intersect_keys_active(_to_,_from_) \ (_to_)&= (_from_) #define mi_is_any_intersect_keys_active(_keymap1_,_keys_,_keymap2_) \ ((_keymap1_) & (_keymap2_) & \ mi_get_mask_all_keys_active(_keys_)) #define mi_copy_keys_active(_to_,_maxkeys_,_from_) \ (_to_)= (mi_get_mask_all_keys_active(_maxkeys_) & \ (_from_)) /* 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 */ char *data_file_name, *index_file_name; uint keys; /* Number of keys in use */ uint options; /* HA_OPTION_... 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 */ } MI_ISAMINFO; typedef struct st_mi_create_info { const char *index_file_name, *data_file_name; /* If using symlinks */ ha_rows max_rows; ha_rows reloc_rows; ulonglong auto_increment; ulonglong data_file_length; ulonglong key_file_length; uint old_options; uint16 language; my_bool with_auto_increment; } MI_CREATE_INFO; struct st_myisam_info; /* For reference */ struct st_mi_isam_share; typedef struct st_myisam_info MI_INFO; struct st_mi_s_param; typedef struct st_mi_keydef /* Key definition with open & info */ { struct st_mi_isam_share *share; /* Pointer to base (set in mi_open) */ uint16 keysegs; /* Number of key-segment */ uint16 flag; /* NOSAME, PACK_USED */ uint8 key_alg; /* BTREE, RTREE */ 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_index; /* block_size (auto) */ uint32 version; /* For concurrent read/write */ uint32 ftkey_nr; /* full-text index number */ HA_KEYSEG *seg,*end; struct st_mysql_ftparser *parser; /* Fulltext [pre]parser */ 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); int (*ck_insert)(struct st_myisam_info *inf, uint k_nr, uchar *k, uint klen); int (*ck_delete)(struct st_myisam_info *inf, uint k_nr, uchar *k, uint klen); } 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; HA_KEYSEG *seg,*end; } MI_UNIQUEDEF; typedef struct st_mi_decode_tree /* Decode huff-table */ { uint16 *table; uint quick_table_bits; uchar *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 */ { enum en_fieldtype type; 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 char * myisam_log_filename; /* Name of logfile */ extern ulong myisam_block_size; extern ulong myisam_concurrent_insert; extern my_bool myisam_flush,myisam_delay_key_write,myisam_single_user; extern my_off_t myisam_max_temp_length; extern ulong myisam_data_pointer_size; /* usually used to check if a symlink points into the mysql data home */ /* which is normally forbidden */ extern int (*myisam_test_invalid_symlink)(const char *filename); extern ulonglong myisam_mmap_size, myisam_mmap_used; extern mysql_mutex_t THR_LOCK_myisam_mmap; /* Prototypes for myisam-functions */ extern int mi_close(struct st_myisam_info *file); extern int mi_delete(struct st_myisam_info *file,const uchar *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,uchar *buf,int inx); extern int mi_rkey(MI_INFO *info, uchar *buf, int inx, const uchar *key, key_part_map keypart_map, enum ha_rkey_function search_flag); extern int mi_rlast(struct st_myisam_info *file,uchar *buf,int inx); extern int mi_rnext(struct st_myisam_info *file,uchar *buf,int inx); extern int mi_rnext_same(struct st_myisam_info *info, uchar *buf); extern int mi_rprev(struct st_myisam_info *file,uchar *buf,int inx); extern int mi_rrnd(struct st_myisam_info *file,uchar *buf, my_off_t pos); extern int mi_scan_init(struct st_myisam_info *file); extern int mi_scan(struct st_myisam_info *file,uchar *buf); extern int mi_rsame(struct st_myisam_info *file,uchar *record,int inx); extern int mi_rsame_with_pos(struct st_myisam_info *file,uchar *record, int inx, my_off_t pos); extern int mi_update(struct st_myisam_info *file,const uchar *old, const uchar *new_record); extern int mi_write(struct st_myisam_info *file,const uchar *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, void *extra_arg); extern int mi_reset(struct st_myisam_info *file); extern ha_rows mi_records_in_range(MI_INFO *info,int inx, const key_range *min_key, const key_range *max_key, page_range *pages); 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 uchar *pos); extern uint mi_get_pointer_length(ulonglong file_length, uint def); extern int mi_make_backup_of_index(struct st_myisam_info *info, time_t backup_time, myf flags); #define myisam_max_key_length() HA_MAX_KEY_LENGTH #define myisam_max_key_segments() HA_MAX_KEY_SEG #define MEMMAP_EXTRA_MARGIN 7 /* Write this as a suffix for mmap file */ /* this is used to pass to mysql_myisamchk_table */ #define MYISAMCHK_REPAIR 1 /* equivalent to myisamchk -r */ #define MYISAMCHK_VERIFY 2 /* Verify, run repair if failure */ typedef uint mi_bit_type; typedef struct st_sort_key_blocks SORT_KEY_BLOCKS; typedef struct st_sort_ftbuf SORT_FT_BUF; 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; typedef struct st_sort_info { /* sync things */ mysql_mutex_t mutex; mysql_cond_t cond; MI_INFO *info; HA_CHECK *param; uchar *buff; SORT_KEY_BLOCKS *key_block, *key_block_end; SORT_FT_BUF *ft_buf; my_off_t filelength, dupp, buff_length; ha_rows max_records; uint current_key, total_keys; volatile uint got_error; uint threads_running; myf myf_rw; enum data_file_type new_data_file_type; } MI_SORT_INFO; typedef struct st_mi_sort_param { pthread_t thr; IO_CACHE read_cache, tempfile, tempfile_for_exceptions; DYNAMIC_ARRAY buffpek; MI_BIT_BUFF bit_buff; /* For parallel repair of packrec. */ MI_KEYDEF *keyinfo; MI_SORT_INFO *sort_info; HA_KEYSEG *seg; uchar **sort_keys; uchar *rec_buff; void *wordlist, *wordptr; MEM_ROOT wordroot; uchar *record; MY_TMPDIR *tmpdir; /* The next two are used to collect statistics, see update_key_parts for description. */ ulonglong unique[HA_MAX_KEY_SEG+1]; ulonglong notnull[HA_MAX_KEY_SEG+1]; my_off_t pos,max_pos,filepos,start_recpos; uint key, key_length,real_key_length; uint maxbuffers, find_length; ulonglong sortbuff_size; ha_rows keys; my_bool fix_datafile, master; my_bool calc_checksum; /* calculate table checksum */ 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)(HA_CHECK *); int (*write_keys)(struct st_mi_sort_param *, uchar **, ulonglong , struct st_buffpek *, IO_CACHE *); my_off_t (*read_to_buffer)(IO_CACHE *,struct st_buffpek *, uint); int (*write_key)(struct st_mi_sort_param *, IO_CACHE *,uchar *, uint, ulonglong); } MI_SORT_PARAM; /* functions in mi_check */ void myisamchk_init(HA_CHECK *param); int chk_status(HA_CHECK *param, MI_INFO *info); int chk_del(HA_CHECK *param, MI_INFO *info, ulonglong test_flag); int chk_size(HA_CHECK *param, MI_INFO *info); int chk_key(HA_CHECK *param, MI_INFO *info); int chk_data_link(HA_CHECK *param, MI_INFO *info, my_bool extend); int mi_repair(HA_CHECK *param, MI_INFO *info, char * name, int rep_quick); int mi_sort_index(HA_CHECK *param, MI_INFO *info, char * name); int mi_repair_by_sort(HA_CHECK *param, MI_INFO *info, const char * name, int rep_quick); int mi_repair_parallel(HA_CHECK *param, MI_INFO *info, const char * name, int rep_quick); int change_to_newfile(const char * filename, const char * old_ext, const char * new_ext, time_t backup_time, myf myflags); int lock_file(HA_CHECK *param, File file, my_off_t start, int lock_type, const char *filetype, const char *filename); void lock_memory(HA_CHECK *param); void update_auto_increment_key(HA_CHECK *param, MI_INFO *info, my_bool repair); int update_state_info(HA_CHECK *param, MI_INFO *info,uint update); void update_key_parts(MI_KEYDEF *keyinfo, ulong *rec_per_key_part, ulonglong *unique, ulonglong *notnull, ulonglong records); int filecopy(HA_CHECK *param, File to,File from,my_off_t start, my_off_t length, const char *type); int movepoint(MI_INFO *info,uchar *record,my_off_t oldpos, my_off_t newpos, uint prot_key); int write_data_suffix(MI_SORT_INFO *sort_info, my_bool fix_datafile); int test_if_almost_full(MI_INFO *info); int recreate_table(HA_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, ulonglong key_map, my_bool force); int mi_init_bulk_insert(MI_INFO *info, size_t cache_size, ha_rows rows); void mi_flush_bulk_insert(MI_INFO *info, uint inx); int mi_end_bulk_insert(MI_INFO *info, my_bool abort); int mi_assign_to_key_cache(MI_INFO *info, ulonglong key_map, KEY_CACHE *key_cache); void mi_change_key_cache(KEY_CACHE *old_key_cache, KEY_CACHE *new_key_cache); int mi_preload(MI_INFO *info, ulonglong key_map, my_bool ignore_leaves); int write_data_suffix(MI_SORT_INFO *sort_info, my_bool fix_datafile); 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); int sort_write_record(MI_SORT_PARAM *sort_param); int _create_index_by_sort(MI_SORT_PARAM *info,my_bool no_messages, ulonglong); my_bool mi_too_big_key_for_sort(MI_KEYDEF *key, ha_rows rows); #ifdef __cplusplus } #endif #endif
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