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src/libmysql_std/include/my_base.h
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00001 /* Copyright (C) 2000 MySQL AB
00002 
00003    This program is free software; you can redistribute it and/or modify
00004    it under the terms of the GNU General Public License as published by
00005    the Free Software Foundation; version 2 of the License.
00006 
00007    This program is distributed in the hope that it will be useful,
00008    but WITHOUT ANY WARRANTY; without even the implied warranty of
00009    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
00010    GNU General Public License for more details.
00011 
00012    You should have received a copy of the GNU General Public License
00013    along with this program; if not, write to the Free Software
00014    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA */
00015 
00016 /* This file includes constants used with all databases */
00017 /* Author: Michael Widenius */
00018 
00019 #ifndef _my_base_h
00020 #define _my_base_h
00021 
00022 #ifndef stdin                           /* Included first in handler */
00023 #define USES_TYPES                      /* my_dir with sys/types is included */
00024 #define CHSIZE_USED
00025 #include <my_global.h>
00026 #include <my_dir.h>                     /* This includes types */
00027 #include <my_sys.h>
00028 #include <m_string.h>
00029 #include <errno.h>
00030 
00031 #ifndef EOVERFLOW
00032 #define EOVERFLOW 84
00033 #endif
00034 
00035 #ifdef MSDOS
00036 #include <share.h>                      /* Neaded for sopen() */
00037 #endif
00038 #if !defined(USE_MY_FUNC) && !defined(THREAD)
00039 #include <my_nosys.h>                   /* For faster code, after test */
00040 #endif  /* USE_MY_FUNC */
00041 #endif  /* stdin */
00042 #include <my_list.h>
00043 
00044 /* The following is bits in the flag parameter to ha_open() */
00045 
00046 #define HA_OPEN_ABORT_IF_LOCKED         0       /* default */
00047 #define HA_OPEN_WAIT_IF_LOCKED          1
00048 #define HA_OPEN_IGNORE_IF_LOCKED        2
00049 #define HA_OPEN_TMP_TABLE               4       /* Table is a temp table */
00050 #define HA_OPEN_DELAY_KEY_WRITE         8       /* Don't update index  */
00051 #define HA_OPEN_ABORT_IF_CRASHED        16
00052 #define HA_OPEN_FOR_REPAIR              32      /* open even if crashed */
00053 
00054         /* The following is parameter to ha_rkey() how to use key */
00055 
00056 /*
00057   We define a complete-field prefix of a key value as a prefix where
00058   the last included field in the prefix contains the full field, not
00059   just some bytes from the start of the field. A partial-field prefix
00060   is allowed to contain only a few first bytes from the last included
00061   field.
00062 
00063   Below HA_READ_KEY_EXACT, ..., HA_READ_BEFORE_KEY can take a
00064   complete-field prefix of a key value as the search
00065   key. HA_READ_PREFIX and HA_READ_PREFIX_LAST could also take a
00066   partial-field prefix, but currently (4.0.10) they are only used with
00067   complete-field prefixes. MySQL uses a padding trick to implement
00068   LIKE 'abc%' queries.
00069 
00070   NOTE that in InnoDB HA_READ_PREFIX_LAST will NOT work with a
00071   partial-field prefix because InnoDB currently strips spaces from the
00072   end of varchar fields!
00073 */
00074 
00075 enum ha_rkey_function {
00076   HA_READ_KEY_EXACT,              /* Find first record else error */
00077   HA_READ_KEY_OR_NEXT,            /* Record or next record */
00078   HA_READ_KEY_OR_PREV,            /* Record or previous */
00079   HA_READ_AFTER_KEY,              /* Find next rec. after key-record */
00080   HA_READ_BEFORE_KEY,             /* Find next rec. before key-record */
00081   HA_READ_PREFIX,                 /* Key which as same prefix */
00082   HA_READ_PREFIX_LAST,            /* Last key with the same prefix */
00083   HA_READ_PREFIX_LAST_OR_PREV,    /* Last or prev key with the same prefix */
00084   HA_READ_MBR_CONTAIN,
00085   HA_READ_MBR_INTERSECT,
00086   HA_READ_MBR_WITHIN,
00087   HA_READ_MBR_DISJOINT,
00088   HA_READ_MBR_EQUAL
00089 };
00090 
00091         /* Key algorithm types */
00092 
00093 enum ha_key_alg {
00094   HA_KEY_ALG_UNDEF=     0,              /* Not specified (old file) */
00095   HA_KEY_ALG_BTREE=     1,              /* B-tree, default one          */
00096   HA_KEY_ALG_RTREE=     2,              /* R-tree, for spatial searches */
00097   HA_KEY_ALG_HASH=      3,              /* HASH keys (HEAP tables) */
00098   HA_KEY_ALG_FULLTEXT=  4               /* FULLTEXT (MyISAM tables) */
00099 };
00100 
00101         /* The following is parameter to ha_extra() */
00102 
00103 enum ha_extra_function {
00104   HA_EXTRA_NORMAL=0,                    /* Optimize for space (def) */
00105   HA_EXTRA_QUICK=1,                     /* Optimize for speed */
00106   HA_EXTRA_RESET=2,                     /* Reset database to after open */
00107   HA_EXTRA_CACHE=3,                     /* Cache record in HA_rrnd() */
00108   HA_EXTRA_NO_CACHE=4,                  /* End caching of records (def) */
00109   HA_EXTRA_NO_READCHECK=5,              /* No readcheck on update */
00110   HA_EXTRA_READCHECK=6,                 /* Use readcheck (def) */
00111   HA_EXTRA_KEYREAD=7,                   /* Read only key to database */
00112   HA_EXTRA_NO_KEYREAD=8,                /* Normal read of records (def) */
00113   HA_EXTRA_NO_USER_CHANGE=9,            /* No user is allowed to write */
00114   HA_EXTRA_KEY_CACHE=10,
00115   HA_EXTRA_NO_KEY_CACHE=11,
00116   HA_EXTRA_WAIT_LOCK=12,                /* Wait until file is avalably (def) */
00117   HA_EXTRA_NO_WAIT_LOCK=13,             /* If file is locked, return quickly */
00118   HA_EXTRA_WRITE_CACHE=14,              /* Use write cache in ha_write() */
00119   HA_EXTRA_FLUSH_CACHE=15,              /* flush write_record_cache */
00120   HA_EXTRA_NO_KEYS=16,                  /* Remove all update of keys */
00121   HA_EXTRA_KEYREAD_CHANGE_POS=17,       /* Keyread, but change pos */
00122                                         /* xxxxchk -r must be used */
00123   HA_EXTRA_REMEMBER_POS=18,             /* Remember pos for next/prev */
00124   HA_EXTRA_RESTORE_POS=19,
00125   HA_EXTRA_REINIT_CACHE=20,             /* init cache from current record */
00126   HA_EXTRA_FORCE_REOPEN=21,             /* Datafile have changed on disk */
00127   HA_EXTRA_FLUSH,                       /* Flush tables to disk */
00128   HA_EXTRA_NO_ROWS,                     /* Don't write rows */
00129   HA_EXTRA_RESET_STATE,                 /* Reset positions */
00130   HA_EXTRA_IGNORE_DUP_KEY,              /* Dup keys don't rollback everything*/
00131   HA_EXTRA_NO_IGNORE_DUP_KEY,
00132   /*
00133     Instructs InnoDB to retrieve all columns (except in key read), not just
00134     those where field->query_id is the same as the current query id
00135   */
00136   HA_EXTRA_RETRIEVE_ALL_COLS,
00137   /*
00138     Instructs InnoDB to retrieve at least all the primary key columns
00139   */
00140   HA_EXTRA_RETRIEVE_PRIMARY_KEY,
00141   HA_EXTRA_PREPARE_FOR_DELETE,
00142   HA_EXTRA_PREPARE_FOR_UPDATE,          /* Remove read cache if problems */
00143   HA_EXTRA_PRELOAD_BUFFER_SIZE,         /* Set buffer size for preloading */
00144   /*
00145     On-the-fly switching between unique and non-unique key inserting.
00146   */
00147   HA_EXTRA_CHANGE_KEY_TO_UNIQUE,
00148   HA_EXTRA_CHANGE_KEY_TO_DUP,
00149   /*
00150     When using HA_EXTRA_KEYREAD, overwrite only key member fields and keep 
00151     other fields intact. When this is off (by default) InnoDB will use memcpy
00152     to overwrite entire row.
00153   */
00154   HA_EXTRA_KEYREAD_PRESERVE_FIELDS,
00155   /*
00156     Informs handler that write_row() which tries to insert new row into the
00157     table and encounters some already existing row with same primary/unique
00158     key can replace old row with new row instead of reporting error (basically
00159     it informs handler that we do REPLACE instead of simple INSERT).
00160     Off by default.
00161   */
00162   HA_EXTRA_WRITE_CAN_REPLACE,
00163   HA_EXTRA_WRITE_CANNOT_REPLACE,
00164   /*
00165     Inform handler that delete_row()/update_row() cannot batch deletes/updates
00166     and should perform them immediately. This may be needed when table has 
00167     AFTER DELETE/UPDATE triggers which access to subject table.
00168     These flags are reset by the handler::extra(HA_EXTRA_RESET) call.
00169   */
00170   HA_EXTRA_DELETE_CANNOT_BATCH,
00171   HA_EXTRA_UPDATE_CANNOT_BATCH,
00172   /*
00173     Inform handler that an "INSERT...ON DUPLICATE KEY UPDATE" will be
00174     executed. This condition is unset by HA_EXTRA_NO_IGNORE_DUP_KEY.
00175   */
00176   HA_EXTRA_INSERT_WITH_UPDATE
00177 };
00178 
00179         /* The following is parameter to ha_panic() */
00180 
00181 enum ha_panic_function {
00182   HA_PANIC_CLOSE,                       /* Close all databases */
00183   HA_PANIC_WRITE,                       /* Unlock and write status */
00184   HA_PANIC_READ                         /* Lock and read keyinfo */
00185 };
00186 
00187         /* The following is parameter to ha_create(); keytypes */
00188 
00189 enum ha_base_keytype {
00190   HA_KEYTYPE_END=0,
00191   HA_KEYTYPE_TEXT=1,                    /* Key is sorted as letters */
00192   HA_KEYTYPE_BINARY=2,                  /* Key is sorted as unsigned chars */
00193   HA_KEYTYPE_SHORT_INT=3,
00194   HA_KEYTYPE_LONG_INT=4,
00195   HA_KEYTYPE_FLOAT=5,
00196   HA_KEYTYPE_DOUBLE=6,
00197   HA_KEYTYPE_NUM=7,                     /* Not packed num with pre-space */
00198   HA_KEYTYPE_USHORT_INT=8,
00199   HA_KEYTYPE_ULONG_INT=9,
00200   HA_KEYTYPE_LONGLONG=10,
00201   HA_KEYTYPE_ULONGLONG=11,
00202   HA_KEYTYPE_INT24=12,
00203   HA_KEYTYPE_UINT24=13,
00204   HA_KEYTYPE_INT8=14,
00205   /* Varchar (0-255 bytes) with length packed with 1 byte */
00206   HA_KEYTYPE_VARTEXT1=15,               /* Key is sorted as letters */
00207   HA_KEYTYPE_VARBINARY1=16,             /* Key is sorted as unsigned chars */
00208   /* Varchar (0-65535 bytes) with length packed with 2 bytes */
00209   HA_KEYTYPE_VARTEXT2=17,               /* Key is sorted as letters */
00210   HA_KEYTYPE_VARBINARY2=18,             /* Key is sorted as unsigned chars */
00211   HA_KEYTYPE_BIT=19
00212 };
00213 
00214 #define HA_MAX_KEYTYPE  31              /* Must be log2-1 */
00215 
00216         /* These flags kan be OR:ed to key-flag */
00217 
00218 #define HA_NOSAME                1      /* Set if not dupplicated records */
00219 #define HA_PACK_KEY              2      /* Pack string key to previous key */
00220 #define HA_AUTO_KEY              16
00221 #define HA_BINARY_PACK_KEY       32     /* Packing of all keys to prev key */
00222 #define HA_FULLTEXT             128     /* For full-text search */
00223 #define HA_UNIQUE_CHECK         256     /* Check the key for uniqueness */
00224 #define HA_SPATIAL              1024    /* For spatial search */
00225 #define HA_NULL_ARE_EQUAL       2048    /* NULL in key are cmp as equal */
00226 #define HA_GENERATED_KEY        8192    /* Automaticly generated key */
00227 
00228         /* Automatic bits in key-flag */
00229 
00230 #define HA_SPACE_PACK_USED       4      /* Test for if SPACE_PACK used */
00231 #define HA_VAR_LENGTH_KEY        8
00232 #define HA_NULL_PART_KEY         64
00233 #ifndef ISAM_LIBRARY
00234 #define HA_SORT_ALLOWS_SAME      512    /* Intern bit when sorting records */
00235 #else
00236 /* poor old NISAM has 8-bit flags :-( */
00237 #define HA_SORT_ALLOWS_SAME      128    /* Intern bit when sorting records */
00238 #endif
00239 #if MYSQL_VERSION_ID < 0x50200
00240 /*
00241   Key has a part that can have end space.  If this is an unique key
00242   we have to handle it differently from other unique keys as we can find
00243   many matching rows for one key (because end space are not compared)
00244 */
00245 #define HA_END_SPACE_KEY      0 /* was: 4096 */
00246 #else
00247 #error HA_END_SPACE_KEY is obsolete, please remove it
00248 #endif
00249 
00250 
00251         /* These flags can be added to key-seg-flag */
00252 
00253 #define HA_SPACE_PACK            1      /* Pack space in key-seg */
00254 #define HA_PART_KEY_SEG          4      /* Used by MySQL for part-key-cols */
00255 #define HA_VAR_LENGTH_PART       8
00256 #define HA_NULL_PART             16
00257 #define HA_BLOB_PART             32
00258 #define HA_SWAP_KEY              64
00259 #define HA_REVERSE_SORT          128    /* Sort key in reverse order */
00260 #define HA_NO_SORT               256 /* do not bother sorting on this keyseg */
00261 /*
00262   End space in unique/varchar are considered equal. (Like 'a' and 'a ')
00263   Only needed for internal temporary tables.
00264 */
00265 #define HA_END_SPACE_ARE_EQUAL   512
00266 #define HA_BIT_PART             1024
00267 
00268         /* optionbits for database */
00269 #define HA_OPTION_PACK_RECORD           1
00270 #define HA_OPTION_PACK_KEYS             2
00271 #define HA_OPTION_COMPRESS_RECORD       4
00272 #define HA_OPTION_LONG_BLOB_PTR         8 /* new ISAM format */
00273 #define HA_OPTION_TMP_TABLE             16
00274 #define HA_OPTION_CHECKSUM              32
00275 #define HA_OPTION_DELAY_KEY_WRITE       64
00276 #define HA_OPTION_NO_PACK_KEYS          128  /* Reserved for MySQL */
00277 #define HA_OPTION_CREATE_FROM_ENGINE    256
00278 #define HA_OPTION_TEMP_COMPRESS_RECORD  ((uint) 16384)  /* set by isamchk */
00279 #define HA_OPTION_READ_ONLY_DATA        ((uint) 32768)  /* Set by isamchk */
00280 
00281         /* Bits in flag to create() */
00282 
00283 #define HA_DONT_TOUCH_DATA      1       /* Don't empty datafile (isamchk) */
00284 #define HA_PACK_RECORD          2       /* Request packed record format */
00285 #define HA_CREATE_TMP_TABLE     4
00286 #define HA_CREATE_CHECKSUM      8
00287 #define HA_CREATE_KEEP_FILES    16      /* don't overwrite .MYD and MYI */
00288 #define HA_CREATE_DELAY_KEY_WRITE 64
00289 
00290 /*
00291   The following flags (OR-ed) are passed to handler::info() method.
00292   The method copies misc handler information out of the storage engine
00293   to data structures accessible from MySQL
00294 
00295   Same flags are also passed down to mi_status, myrg_status, etc.
00296 */
00297 
00298 /* this one is not used */
00299 #define HA_STATUS_POS            1
00300 /*
00301   assuming the table keeps shared actual copy of the 'info' and
00302   local, possibly outdated copy, the following flag means that
00303   it should not try to get the actual data (locking the shared structure)
00304   slightly outdated version will suffice
00305 */
00306 #define HA_STATUS_NO_LOCK        2
00307 /* update the time of the last modification (in handler::update_time) */
00308 #define HA_STATUS_TIME           4
00309 /*
00310   update the 'constant' part of the info:
00311   handler::max_data_file_length, max_index_file_length, create_time
00312   sortkey, ref_length, block_size, data_file_name, index_file_name.
00313   handler::table->s->keys_in_use, keys_for_keyread, rec_per_key
00314 */
00315 #define HA_STATUS_CONST          8
00316 /*
00317   update the 'variable' part of the info:
00318   handler::records, deleted, data_file_length, index_file_length,
00319   delete_length, check_time, mean_rec_length
00320 */
00321 #define HA_STATUS_VARIABLE      16
00322 /*
00323   get the information about the key that caused last duplicate value error
00324   update handler::errkey and handler::dupp_ref
00325   see handler::get_dup_key()
00326 */
00327 #define HA_STATUS_ERRKEY        32
00328 /*
00329   update handler::auto_increment_value
00330 */
00331 #define HA_STATUS_AUTO          64
00332 
00333         /* Errorcodes given by functions */
00334 
00335 /* opt_sum_query() assumes these codes are > 1 */
00336 /* Do not add error numbers before HA_ERR_FIRST. */
00337 /* If necessary to add lower numbers, change HA_ERR_FIRST accordingly. */
00338 #define HA_ERR_FIRST            120 /*Copy first error nr.*/
00339 #define HA_ERR_KEY_NOT_FOUND    120     /* Didn't find key on read or update */
00340 #define HA_ERR_FOUND_DUPP_KEY   121     /* Dupplicate key on write */
00341 #define HA_ERR_RECORD_CHANGED   123     /* Uppdate with is recoverable */
00342 #define HA_ERR_WRONG_INDEX      124     /* Wrong index given to function */
00343 #define HA_ERR_CRASHED          126     /* Indexfile is crashed */
00344 #define HA_ERR_WRONG_IN_RECORD  127     /* Record-file is crashed */
00345 #define HA_ERR_OUT_OF_MEM       128     /* Record-file is crashed */
00346 #define HA_ERR_NOT_A_TABLE      130     /* not a MYI file - no signature */
00347 #define HA_ERR_WRONG_COMMAND    131     /* Command not supported */
00348 #define HA_ERR_OLD_FILE         132     /* old databasfile */
00349 #define HA_ERR_NO_ACTIVE_RECORD 133     /* No record read in update() */
00350 #define HA_ERR_RECORD_DELETED   134     /* Intern error-code */
00351 #define HA_ERR_RECORD_FILE_FULL 135     /* No more room in file */
00352 #define HA_ERR_INDEX_FILE_FULL  136     /* No more room in file */
00353 #define HA_ERR_END_OF_FILE      137     /* end in next/prev/first/last */
00354 #define HA_ERR_UNSUPPORTED      138     /* unsupported extension used */
00355 #define HA_ERR_TO_BIG_ROW       139     /* Too big row */
00356 #define HA_WRONG_CREATE_OPTION  140     /* Wrong create option */
00357 #define HA_ERR_FOUND_DUPP_UNIQUE 141    /* Dupplicate unique on write */
00358 #define HA_ERR_UNKNOWN_CHARSET   142    /* Can't open charset */
00359 #define HA_ERR_WRONG_MRG_TABLE_DEF 143    /* conflicting MyISAM tables in MERGE */
00360 #define HA_ERR_CRASHED_ON_REPAIR 144    /* Last (automatic?) repair failed */
00361 #define HA_ERR_CRASHED_ON_USAGE  145    /* Table must be repaired */
00362 #define HA_ERR_LOCK_WAIT_TIMEOUT 146
00363 #define HA_ERR_LOCK_TABLE_FULL   147
00364 #define HA_ERR_READ_ONLY_TRANSACTION 148 /* Updates not allowed */
00365 #define HA_ERR_LOCK_DEADLOCK     149
00366 #define HA_ERR_CANNOT_ADD_FOREIGN 150    /* Cannot add a foreign key constr. */
00367 #define HA_ERR_NO_REFERENCED_ROW 151     /* Cannot add a child row */
00368 #define HA_ERR_ROW_IS_REFERENCED 152     /* Cannot delete a parent row */
00369 #define HA_ERR_NO_SAVEPOINT      153     /* No savepoint with that name */
00370 #define HA_ERR_NON_UNIQUE_BLOCK_SIZE 154 /* Non unique key block size */
00371 #define HA_ERR_NO_SUCH_TABLE     155  /* The table does not exist in engine */
00372 #define HA_ERR_TABLE_EXIST       156  /* The table existed in storage engine */
00373 #define HA_ERR_NO_CONNECTION     157  /* Could not connect to storage engine */
00374 #define HA_ERR_NULL_IN_SPATIAL   158  /* NULLs are not supported in spatial index */
00375 #define HA_ERR_TABLE_DEF_CHANGED 159  /* The table changed in storage engine */
00376 #define HA_ERR_TABLE_NEEDS_UPGRADE 160  /* The table changed in storage engine */
00377 #define HA_ERR_TABLE_READONLY    161  /* The table is not writable */
00378 #define HA_ERR_AUTOINC_READ_FAILED 162/* Failed to get the next autoinc value */
00379 #define HA_ERR_AUTOINC_ERANGE    163  /* Failed to set the row autoinc value */
00380 
00381 #define HA_ERR_LAST              163  /*Copy last error nr.*/
00382 /* Add error numbers before HA_ERR_LAST and change it accordingly. */
00383 #define HA_ERR_ERRORS            (HA_ERR_LAST - HA_ERR_FIRST + 1)
00384 
00385         /* Other constants */
00386 
00387 #define HA_NAMELEN 64                   /* Max length of saved filename */
00388 #define NO_SUCH_KEY ((uint)~0)          /* used as a key no. */
00389 
00390         /* Intern constants in databases */
00391 
00392         /* bits in _search */
00393 #define SEARCH_FIND     1
00394 #define SEARCH_NO_FIND  2
00395 #define SEARCH_SAME     4
00396 #define SEARCH_BIGGER   8
00397 #define SEARCH_SMALLER  16
00398 #define SEARCH_SAVE_BUFF        32
00399 #define SEARCH_UPDATE   64
00400 #define SEARCH_PREFIX   128
00401 #define SEARCH_LAST     256
00402 #define MBR_CONTAIN     512
00403 #define MBR_INTERSECT   1024
00404 #define MBR_WITHIN      2048
00405 #define MBR_DISJOINT    4096
00406 #define MBR_EQUAL       8192
00407 #define MBR_DATA        16384
00408 #define SEARCH_NULL_ARE_EQUAL 32768     /* NULL in keys are equal */
00409 #define SEARCH_NULL_ARE_NOT_EQUAL 65536 /* NULL in keys are not equal */
00410 
00411         /* bits in opt_flag */
00412 #define QUICK_USED      1
00413 #define READ_CACHE_USED 2
00414 #define READ_CHECK_USED 4
00415 #define KEY_READ_USED   8
00416 #define WRITE_CACHE_USED 16
00417 #define OPT_NO_ROWS     32
00418 
00419         /* bits in update */
00420 #define HA_STATE_CHANGED        1       /* Database has changed */
00421 #define HA_STATE_AKTIV          2       /* Has a current record */
00422 #define HA_STATE_WRITTEN        4       /* Record is written */
00423 #define HA_STATE_DELETED        8
00424 #define HA_STATE_NEXT_FOUND     16      /* Next found record (record before) */
00425 #define HA_STATE_PREV_FOUND     32      /* Prev found record (record after) */
00426 #define HA_STATE_NO_KEY         64      /* Last read didn't find record */
00427 #define HA_STATE_KEY_CHANGED    128
00428 #define HA_STATE_WRITE_AT_END   256     /* set in _ps_find_writepos */
00429 #define HA_STATE_BUFF_SAVED     512     /* If current keybuff is info->buff */
00430 #define HA_STATE_ROW_CHANGED    1024    /* To invalide ROW cache */
00431 #define HA_STATE_EXTEND_BLOCK   2048
00432 #define HA_STATE_RNEXT_SAME     4096    /* rnext_same occupied lastkey2 */
00433 
00434 /* myisampack expects no more than 32 field types. */
00435 enum en_fieldtype {
00436   FIELD_LAST=-1,FIELD_NORMAL,FIELD_SKIP_ENDSPACE,FIELD_SKIP_PRESPACE,
00437   FIELD_SKIP_ZERO,FIELD_BLOB,FIELD_CONSTANT,FIELD_INTERVALL,FIELD_ZERO,
00438   FIELD_VARCHAR,FIELD_CHECK,
00439   FIELD_enum_val_count
00440 };
00441 
00442 enum data_file_type {
00443   STATIC_RECORD,DYNAMIC_RECORD,COMPRESSED_RECORD
00444 };
00445 
00446 /* For key ranges */
00447 
00448 #define NO_MIN_RANGE    1
00449 #define NO_MAX_RANGE    2
00450 #define NEAR_MIN        4
00451 #define NEAR_MAX        8
00452 #define UNIQUE_RANGE    16
00453 #define EQ_RANGE        32
00454 #define NULL_RANGE      64
00455 #define GEOM_FLAG      128
00456 
00457 typedef struct st_key_range
00458 {
00459   const byte *key;
00460   uint length;
00461   enum ha_rkey_function flag;
00462 } key_range;
00463 
00464 typedef struct st_key_multi_range
00465 {
00466   key_range start_key;
00467   key_range end_key;
00468   char  *ptr;                 /* Free to use by caller (ptr to row etc) */
00469   uint  range_flag;           /* key range flags see above */
00470 } KEY_MULTI_RANGE;
00471 
00472 
00473 /* For number of records */
00474 #ifdef BIG_TABLES
00475 #define rows2double(A)  ulonglong2double(A)
00476 typedef my_off_t        ha_rows;
00477 #else
00478 #define rows2double(A)  (double) (A)
00479 typedef ulong           ha_rows;
00480 #endif
00481 
00482 #define HA_POS_ERROR    (~ (ha_rows) 0)
00483 #define HA_OFFSET_ERROR (~ (my_off_t) 0)
00484 
00485 #if SYSTEM_SIZEOF_OFF_T == 4
00486 #define MAX_FILE_SIZE   INT_MAX32
00487 #else
00488 #define MAX_FILE_SIZE   LONGLONG_MAX
00489 #endif
00490 
00491 #define HA_VARCHAR_PACKLENGTH(field_length) ((field_length) < 256 ? 1 :2)
00492 
00493 #endif /* _my_base_h */
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