mi_create.c 20.6 KB
Newer Older
bk@work.mysql.com's avatar
bk@work.mysql.com committed
1
/* Copyright (C) 2000 MySQL AB & MySQL Finland AB & TCX DataKonsult AB
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
2

bk@work.mysql.com's avatar
bk@work.mysql.com committed
3 4 5 6
   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.
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
7

bk@work.mysql.com's avatar
bk@work.mysql.com committed
8 9 10 11
   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.
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
12

bk@work.mysql.com's avatar
bk@work.mysql.com committed
13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40
   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 */

/* Create a MyISAM table */

#include "fulltext.h"
#if defined(MSDOS) || defined(__WIN__)
#ifdef __WIN__
#include <fcntl.h>
#else
#include <process.h>			/* Prototype for getpid */
#endif
#endif
#include <m_ctype.h>

	/*
	** Old options is used when recreating database, from isamchk
	*/

int mi_create(const char *name,uint keys,MI_KEYDEF *keydefs,
	      uint columns, MI_COLUMNDEF *recinfo,
	      uint uniques, MI_UNIQUEDEF *uniquedefs,
	      MI_CREATE_INFO *ci,uint flags)
{
  register uint i,j;
  File dfile,file;
  int errpos,save_errno;
41
  myf create_flag;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
42 43 44 45 46
  uint fields,length,max_key_length,packed,pointer,
       key_length,info_length,key_segs,options,min_key_length_skipp,
       base_pos,varchar_count,long_varchar_count,varchar_length,
       max_key_block_length,unique_key_parts,offset;
  ulong reclength, real_reclength,min_pack_length;
47
  char filename[FN_REFLEN],linkname[FN_REFLEN], *linkname_ptr;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
48 49 50 51 52 53 54 55
  ulong pack_reclength;
  ulonglong tot_length,max_rows;
  enum en_fieldtype type;
  MYISAM_SHARE share;
  MI_KEYDEF *keydef,tmp_keydef;
  MI_UNIQUEDEF *uniquedef;
  MI_KEYSEG *keyseg,tmp_keyseg;
  MI_COLUMNDEF *rec;
56
  ulong *rec_per_key_part;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
57 58 59 60 61 62 63 64 65 66
  my_off_t key_root[MI_MAX_POSSIBLE_KEY],key_del[MI_MAX_KEY_BLOCK_SIZE];
  MI_CREATE_INFO tmp_create_info;
  DBUG_ENTER("mi_create");

  if (!ci)
  {
    bzero((char*) &tmp_create_info,sizeof(tmp_create_info));
    ci=&tmp_create_info;
  }

67
  if (keys + uniques > MI_MAX_KEY || columns == 0)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90
  {
    DBUG_RETURN(my_errno=HA_WRONG_CREATE_OPTION);
  }
  LINT_INIT(dfile);
  LINT_INIT(file);
  pthread_mutex_lock(&THR_LOCK_myisam);
  errpos=0;
  options=0;
  bzero((byte*) &share,sizeof(share));

  if (flags & HA_DONT_TOUCH_DATA)
  {
    if (!(ci->old_options & HA_OPTION_TEMP_COMPRESS_RECORD))
      options=ci->old_options &
	(HA_OPTION_COMPRESS_RECORD | HA_OPTION_PACK_RECORD |
	 HA_OPTION_READ_ONLY_DATA | HA_OPTION_CHECKSUM |
	 HA_OPTION_TMP_TABLE | HA_OPTION_DELAY_KEY_WRITE);
    else
      options=ci->old_options &
	(HA_OPTION_CHECKSUM | HA_OPTION_TMP_TABLE | HA_OPTION_DELAY_KEY_WRITE);
  }

  if (ci->reloc_rows > ci->max_rows)
91 92 93 94 95 96
    ci->reloc_rows=ci->max_rows;		/* Check if wrong parameter */

  if (!(rec_per_key_part=
	(ulong*) my_malloc((keys + uniques)*MI_MAX_KEY_SEG*sizeof(long),
			   MYF(MY_WME | MY_ZEROFILL))))
    DBUG_RETURN(my_errno);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121

	/* Start by checking fields and field-types used */

  reclength=varchar_count=varchar_length=long_varchar_count=packed=
    min_pack_length=pack_reclength=0;
  for (rec=recinfo, fields=0 ;
       fields != columns ;
       rec++,fields++)
  {
    reclength+=rec->length;
    if ((type=(enum en_fieldtype) rec->type) != FIELD_NORMAL &&
	type != FIELD_CHECK)
    {
      packed++;
      if (type == FIELD_BLOB)
      {
	share.base.blobs++;
	if (pack_reclength != INT_MAX32)
	{
	  if (rec->length == 4+mi_portable_sizeof_char_ptr)
	    pack_reclength= INT_MAX32;
	  else
	    pack_reclength+=(1 << ((rec->length-mi_portable_sizeof_char_ptr)*8)); /* Max blob length */
	}
      }
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
122 123
      else if (type == FIELD_SKIP_PRESPACE ||
	       type == FIELD_SKIP_ENDSPACE)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140
      {
	if (pack_reclength != INT_MAX32)
	  pack_reclength+= rec->length > 255 ? 2 : 1;
	min_pack_length++;
      }
      else if (type == FIELD_VARCHAR)
      {
	varchar_count++;
	varchar_length+=rec->length-2;
	packed--;
	pack_reclength+=1;
	if (test(rec->length > 257))
	{					/* May be packed on 3 bytes */
	  long_varchar_count++;
	  pack_reclength+=2;
	}
      }
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
141
      else if (type != FIELD_SKIP_ZERO)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
142 143 144 145 146 147 148 149 150 151 152 153 154
      {
	min_pack_length+=rec->length;
	packed--;				/* Not a pack record type */
      }
    }
    else					/* FIELD_NORMAL */
      min_pack_length+=rec->length;
  }
  if ((packed & 7) == 1)
  {				/* Bad packing, try to remove a zero-field */
    while (rec != recinfo)
    {
      rec--;
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
155
      if (rec->type == (int) FIELD_SKIP_ZERO && rec->length == 1)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
156 157 158 159 160 161 162 163 164 165 166
      {
	rec->type=(int) FIELD_NORMAL;
	packed--;
	min_pack_length++;
	break;
      }
    }
  }

  if (packed || (flags & HA_PACK_RECORD))
    options|=HA_OPTION_PACK_RECORD;	/* Must use packed records */
167 168 169
  /* We can't use checksum with static length rows */
  if (!(options & HA_OPTION_PACK_RECORD))
    options&= ~HA_OPTION_CHECKSUM;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229
  if (options & (HA_OPTION_PACK_RECORD | HA_OPTION_COMPRESS_RECORD))
    min_pack_length+=varchar_count;		/* Min length to pack */
  else
  {
    min_pack_length+=varchar_length+2*varchar_count;
  }
  if (flags & HA_CREATE_TMP_TABLE)
    options|= HA_OPTION_TMP_TABLE;
  if (flags & HA_CREATE_CHECKSUM || (options & HA_OPTION_CHECKSUM))
  {
    options|= HA_OPTION_CHECKSUM;
    min_pack_length++;
  }
  if (flags & HA_CREATE_DELAY_KEY_WRITE)
    options|= HA_OPTION_DELAY_KEY_WRITE;

  packed=(packed+7)/8;
  if (pack_reclength != INT_MAX32)
    pack_reclength+= reclength+packed +
      test(test_all_bits(options, HA_OPTION_CHECKSUM | HA_PACK_RECORD));
  min_pack_length+=packed;

  if (!ci->data_file_length)
  {
    if (ci->max_rows == 0 || pack_reclength == INT_MAX32)
      ci->data_file_length= INT_MAX32-1;		/* Should be enough */
    else if ((~(ulonglong) 0)/ci->max_rows < (ulonglong) pack_reclength)
      ci->data_file_length= ~(ulonglong) 0;
    else
      ci->data_file_length=(ulonglong) ci->max_rows*pack_reclength;
  }
  else if (!ci->max_rows)
    ci->max_rows=(ha_rows) (ci->data_file_length/(min_pack_length +
					 ((options & HA_OPTION_PACK_RECORD) ?
					  3 : 0)));

  if (options & (HA_OPTION_COMPRESS_RECORD | HA_OPTION_PACK_RECORD))
    pointer=mi_get_pointer_length(ci->data_file_length,4);
  else
    pointer=mi_get_pointer_length(ci->max_rows,4);
  if (!(max_rows=(ulonglong) ci->max_rows))
    max_rows= ((((ulonglong) 1 << (pointer*8)) -1) / min_pack_length);


  real_reclength=reclength;
  if (!(options & (HA_OPTION_COMPRESS_RECORD | HA_OPTION_PACK_RECORD)))
  {
    if (reclength <= pointer)
      reclength=pointer+1;		/* reserve place for delete link */
  }
  else
    reclength+=long_varchar_count;	/* We need space for this! */

  max_key_length=0; tot_length=0 ; key_segs=0;
  max_key_block_length=0;
  share.state.rec_per_key_part=rec_per_key_part;
  share.state.key_root=key_root;
  share.state.key_del=key_del;
  if (uniques)
  {
230
    max_key_block_length= myisam_block_size;
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
231
    max_key_length=	  MI_UNIQUE_HASH_LENGTH + pointer;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280
  }

  for (i=0, keydef=keydefs ; i < keys ; i++ , keydef++)
  {
    share.state.key_root[i]= HA_OFFSET_ERROR;

    min_key_length_skipp=length=0;
    key_length=pointer;

    if (keydef->flag & HA_FULLTEXT)                                 /* SerG */
    {
      keydef->flag=HA_FULLTEXT | HA_PACK_KEY | HA_VAR_LENGTH_KEY;
      options|=HA_OPTION_PACK_KEYS;             /* Using packed keys */

      if (flags & HA_DONT_TOUCH_DATA)
      {
        /* called by myisamchk - i.e. table structure was taken from
           MYI file and FULLTEXT key *do has* additional FT_SEGS keysegs.
           We'd better delete them now
        */
        keydef->keysegs-=FT_SEGS;
      }

      for (j=0, keyseg=keydef->seg ; (int) j < keydef->keysegs ;
	   j++, keyseg++)
      {
        if (keyseg->type != HA_KEYTYPE_TEXT &&
	    keyseg->type != HA_KEYTYPE_VARTEXT)
        {
          my_errno=HA_WRONG_CREATE_OPTION;
          goto err;
        }
      }
      keydef->keysegs+=FT_SEGS;

      key_length+= HA_FT_MAXLEN+HA_FT_WLEN;
#ifdef EVAL_RUN
      key_length++;
#endif

      length++;                              /* At least one length byte */
      min_key_length_skipp+=HA_FT_MAXLEN;
#if HA_FT_MAXLEN >= 255
      min_key_length_skipp+=2;                  /* prefix may be 3 bytes */
      length+=2;
#endif
    }
    else
    {
281 282
      /* Test if prefix compression */
      if (keydef->flag & HA_PACK_KEY)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
283
      {
284 285 286 287 288
	/* Can't use space_compression on number keys */
	if ((keydef->seg[0].flag & HA_SPACE_PACK) &&
	    keydef->seg[0].type == (int) HA_KEYTYPE_NUM)
	  keydef->seg[0].flag&= ~HA_SPACE_PACK;

289
	/* Only use HA_PACK_KEY when first segment is a variable length key */
290 291 292 293 294 295 296 297 298 299 300 301 302
	if (!(keydef->seg[0].flag & (HA_SPACE_PACK | HA_BLOB_PART |
				     HA_VAR_LENGTH)))
	{
	  /* pack relative to previous key */
	  keydef->flag&= ~HA_PACK_KEY;
	  keydef->flag|= HA_BINARY_PACK_KEY | HA_VAR_LENGTH_KEY;
	}
	else
	{
	  keydef->seg[0].flag|=HA_PACK_KEY;	/* for easyer intern test */
	  keydef->flag|=HA_VAR_LENGTH_KEY;
	  options|=HA_OPTION_PACK_KEYS;		/* Using packed keys */
	}
bk@work.mysql.com's avatar
bk@work.mysql.com committed
303
      }
304
      if (keydef->flag & HA_BINARY_PACK_KEY)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
305 306
	options|=HA_OPTION_PACK_KEYS;		/* Using packed keys */

307
      if (keydef->flag & HA_AUTO_KEY && ci->with_auto_increment)
308 309
	share.base.auto_key=i+1;
      for (j=0, keyseg=keydef->seg ; j < keydef->keysegs ; j++, keyseg++)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
310
      {
311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327
	/* numbers are stored with high by first to make compression easier */
	switch (keyseg->type) {
	case HA_KEYTYPE_SHORT_INT:
	case HA_KEYTYPE_LONG_INT:
	case HA_KEYTYPE_FLOAT:
	case HA_KEYTYPE_DOUBLE:
	case HA_KEYTYPE_USHORT_INT:
	case HA_KEYTYPE_ULONG_INT:
	case HA_KEYTYPE_LONGLONG:
	case HA_KEYTYPE_ULONGLONG:
	case HA_KEYTYPE_INT24:
	case HA_KEYTYPE_UINT24:
	case HA_KEYTYPE_INT8:
	  keyseg->flag|= HA_SWAP_KEY;
	  /* fall through */
	default:
	  break;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
328
	}
329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359
	if (keyseg->flag & HA_SPACE_PACK)
	{
	  keydef->flag |= HA_SPACE_PACK_USED | HA_VAR_LENGTH_KEY;
	  options|=HA_OPTION_PACK_KEYS;		/* Using packed keys */
	  length++;				/* At least one length byte */
	  min_key_length_skipp+=keyseg->length;
	  if (keyseg->length >= 255)
	  {					/* prefix may be 3 bytes */
	    min_key_length_skipp+=2;
	    length+=2;
	  }
	}
	if (keyseg->flag & (HA_VAR_LENGTH | HA_BLOB_PART))
	{
	  keydef->flag|=HA_VAR_LENGTH_KEY;
	  length++;				/* At least one length byte */
	  options|=HA_OPTION_PACK_KEYS;		/* Using packed keys */
	  min_key_length_skipp+=keyseg->length;
	  if (keyseg->length >= 255)
	  {					/* prefix may be 3 bytes */
	    min_key_length_skipp+=2;
	    length+=2;
	  }
	}
	key_length+= keyseg->length;
	if (keyseg->null_bit)
	{
	  key_length++;
	  options|=HA_OPTION_PACK_KEYS;
	  keyseg->flag|=HA_NULL_PART;
	  keydef->flag|=HA_VAR_LENGTH_KEY | HA_NULL_PART_KEY;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
360 361 362 363 364 365 366 367 368
	}
      }
    } /* if HA_FULLTEXT */
    key_segs+=keydef->keysegs;
    if (keydef->keysegs > MI_MAX_KEY_SEG)
    {
      my_errno=HA_WRONG_CREATE_OPTION;
      goto err;
    }
369 370 371 372 373 374 375
    /*
      key_segs may be 0 in the case when we only want to be able to
      add on row into the table. This can happen with some DISTINCT queries
      in MySQL
    */
    if ((keydef->flag & (HA_NOSAME | HA_NULL_PART_KEY)) == HA_NOSAME &&
	key_segs)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
376 377 378
      share.state.rec_per_key_part[key_segs-1]=1L;
    length+=key_length;
    keydef->block_length= MI_BLOCK_SIZE(length,pointer,MI_MAX_KEYPTR_SIZE);
379
    if (keydef->block_length > MI_MAX_KEY_BLOCK_LENGTH ||
380
        length >= MI_MAX_KEY_BUFF)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
381 382 383 384 385 386 387 388 389 390 391 392 393 394 395
    {
      my_errno=HA_WRONG_CREATE_OPTION;
      goto err;
    }
    set_if_bigger(max_key_block_length,keydef->block_length);
    keydef->keylength= (uint16) key_length;
    keydef->minlength= (uint16) (length-min_key_length_skipp);
    keydef->maxlength= (uint16) length;

    if (length > max_key_length)
      max_key_length= length;
    tot_length+= (max_rows/(ulong) (((uint) keydef->block_length-5)/
				    (length*2)))*
      (ulong) keydef->block_length;
  }
396
  for (i=max_key_block_length/MI_MIN_KEY_BLOCK_LENGTH ; i-- ; )
bk@work.mysql.com's avatar
bk@work.mysql.com committed
397 398 399 400 401 402 403 404 405
    key_del[i]=HA_OFFSET_ERROR;

  unique_key_parts=0;
  offset=reclength-uniques*MI_UNIQUE_HASH_LENGTH;
  for (i=0, uniquedef=uniquedefs ; i < uniques ; i++ , uniquedef++)
  {
    uniquedef->key=keys+i;
    unique_key_parts+=uniquedef->keysegs;
    share.state.key_root[keys+i]= HA_OFFSET_ERROR;
406 407 408
    tot_length+= (max_rows/(ulong) (((uint) myisam_block_size-5)/
                         ((MI_UNIQUE_HASH_LENGTH + pointer)*2)))*
                         (ulong) myisam_block_size;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
409 410 411 412 413
  }
  keys+=uniques;				/* Each unique has 1 key */
  key_segs+=uniques;				/* Each unique has 1 key seg */

  base_pos=(MI_STATE_INFO_SIZE + keys * MI_STATE_KEY_SIZE +
414 415
	    max_key_block_length/MI_MIN_KEY_BLOCK_LENGTH*
	    MI_STATE_KEYBLOCK_SIZE+
bk@work.mysql.com's avatar
bk@work.mysql.com committed
416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433
	    key_segs*MI_STATE_KEYSEG_SIZE);
  info_length=base_pos+(uint) (MI_BASE_INFO_SIZE+
			       keys * MI_KEYDEF_SIZE+
			       uniques * MI_UNIQUEDEF_SIZE +
			       (key_segs + unique_key_parts)*MI_KEYSEG_SIZE+
			       columns*MI_COLUMNDEF_SIZE);

  bmove(share.state.header.file_version,(byte*) myisam_file_magic,4);
  ci->old_options=options| (ci->old_options & HA_OPTION_TEMP_COMPRESS_RECORD ?
			HA_OPTION_COMPRESS_RECORD |
			HA_OPTION_TEMP_COMPRESS_RECORD: 0);
  mi_int2store(share.state.header.options,ci->old_options);
  mi_int2store(share.state.header.header_length,info_length);
  mi_int2store(share.state.header.state_info_length,MI_STATE_INFO_SIZE);
  mi_int2store(share.state.header.base_info_length,MI_BASE_INFO_SIZE);
  mi_int2store(share.state.header.base_pos,base_pos);
  share.state.header.language= (ci->language ?
				ci->language : MY_CHARSET_CURRENT);
434
  share.state.header.max_block_size=max_key_block_length/MI_MIN_KEY_BLOCK_LENGTH;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
435 436 437 438

  share.state.dellink = HA_OFFSET_ERROR;
  share.state.process=	(ulong) getpid();
  share.state.unique=	(ulong) 0;
439
  share.state.update_count=(ulong) 0;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
440 441 442 443 444 445 446
  share.state.version=	(ulong) time((time_t*) 0);
  share.state.sortkey=  (ushort) ~0;
  share.state.auto_increment=ci->auto_increment;
  share.options=options;
  share.base.rec_reflength=pointer;
  share.base.key_reflength=
    mi_get_pointer_length((tot_length + max_key_block_length * keys *
447
			   MI_INDEX_BLOCK_MARGIN) / MI_MIN_KEY_BLOCK_LENGTH,
bk@work.mysql.com's avatar
bk@work.mysql.com committed
448 449 450 451 452 453 454 455 456 457
			  3);
  share.base.keys= share.state.header.keys = keys;
  share.state.header.uniques= uniques;
  mi_int2store(share.state.header.key_parts,key_segs);
  mi_int2store(share.state.header.unique_key_parts,unique_key_parts);

  share.state.key_map = ((ulonglong) 1 << keys)-1;
  share.base.keystart = share.state.state.key_file_length=
    MY_ALIGN(info_length, myisam_block_size);
  share.base.max_key_block_length=max_key_block_length;
monty@mashka.mysql.fi's avatar
monty@mashka.mysql.fi committed
458
  share.base.max_key_length=ALIGN_SIZE(max_key_length+4);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
459 460 461
  share.base.records=ci->max_rows;
  share.base.reloc=  ci->reloc_rows;
  share.base.reclength=real_reclength;
462
  share.base.pack_reclength=reclength+ test(options & HA_OPTION_CHECKSUM);
bk@work.mysql.com's avatar
bk@work.mysql.com committed
463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484
  share.base.max_pack_length=pack_reclength;
  share.base.min_pack_length=min_pack_length;
  share.base.pack_bits=packed;
  share.base.fields=fields;
  share.base.pack_fields=packed;
#ifdef USE_RAID
  share.base.raid_type=ci->raid_type;
  share.base.raid_chunks=ci->raid_chunks;
  share.base.raid_chunksize=ci->raid_chunksize;
#endif

  /* max_data_file_length and max_key_file_length are recalculated on open */
  if (options & HA_OPTION_TMP_TABLE)
    share.base.max_data_file_length=(my_off_t) ci->data_file_length;

  share.base.min_block_length=
    (share.base.pack_reclength+3 < MI_EXTEND_BLOCK_LENGTH &&
     ! share.base.blobs) ?
    max(share.base.pack_reclength,MI_MIN_BLOCK_LENGTH) :
    MI_EXTEND_BLOCK_LENGTH;
  if (! (flags & HA_DONT_TOUCH_DATA))
    share.state.create_time= (long) time((time_t*) 0);
monty@hundin.mysql.fi's avatar
monty@hundin.mysql.fi committed
485

486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504
  if (ci->index_file_name)
  {
    fn_format(filename, ci->index_file_name,"",MI_NAME_IEXT,4);
    fn_format(linkname,name, "",MI_NAME_IEXT,4);
    linkname_ptr=linkname;
    /*
      Don't create the table if the link or file exists to ensure that one
      doesn't accidently destroy another table.
    */
    create_flag=0;
  }
  else
  {
    fn_format(filename,name,"",MI_NAME_IEXT,(4+ (flags & HA_DONT_TOUCH_DATA) ?
					     32 : 0));
    linkname_ptr=0;
    /* Replace the current file */
    create_flag=MY_DELETE_OLD;
  }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
505

506 507
  if ((file= my_create_with_symlink(linkname_ptr,
				    filename,
508
				    0, O_RDWR | O_TRUNC,
509
				    MYF(MY_WME | create_flag))) < 0)
bk@work.mysql.com's avatar
bk@work.mysql.com committed
510 511
    goto err;
  errpos=1;
512

bk@work.mysql.com's avatar
bk@work.mysql.com committed
513 514 515 516 517
  if (!(flags & HA_DONT_TOUCH_DATA))
  {
#ifdef USE_RAID
    if (share.base.raid_type)
    {
518 519
      (void) fn_format(filename,name,"",MI_NAME_DEXT,2+4);
      if ((dfile=my_raid_create(filename,0,O_RDWR | O_TRUNC,
bk@work.mysql.com's avatar
bk@work.mysql.com committed
520 521 522 523 524 525 526 527
				share.base.raid_type,
				share.base.raid_chunks,
				share.base.raid_chunksize,
				MYF(MY_WME | MY_RAID))) < 0)
	goto err;
    }
    else
#endif
528
    {
529 530 531 532 533 534 535 536 537 538 539 540 541
      if (ci->data_file_name)
      {
	fn_format(filename, ci->data_file_name,"",MI_NAME_DEXT,4);
	fn_format(linkname, name, "",MI_NAME_DEXT,4);
	linkname_ptr=linkname;
	create_flag=0;
      }
      else
      {
	fn_format(filename,name,"",MI_NAME_DEXT,4);
	linkname_ptr=0;
	create_flag=MY_DELETE_OLD;
      }
542
      if ((dfile= 
543 544 545
	   my_create_with_symlink(linkname_ptr, filename,
				  0,O_RDWR | O_TRUNC,
				  MYF(MY_WME | create_flag))) < 0)
546 547
	goto err;
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565
    errpos=3;
  }

  if (mi_state_info_write(file, &share.state, 2) ||
      mi_base_info_write(file, &share.base))
    goto err;
#ifndef DBUG_OFF
  if ((uint) my_tell(file,MYF(0)) != base_pos+ MI_BASE_INFO_SIZE)
  {
    uint pos=(uint) my_tell(file,MYF(0));
    DBUG_PRINT("warning",("base_length: %d  != used_length: %d",
			  base_pos+ MI_BASE_INFO_SIZE, pos));
  }
#endif

  /* Write key and keyseg definitions */
  for (i=0 ; i < share.base.keys - uniques; i++)
  {
566
    uint ft_segs=(keydefs[i].flag & HA_FULLTEXT) ? FT_SEGS : 0;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
567 568 569 570 571 572

    if (mi_keydef_write(file, &keydefs[i]))
      goto err;
    for (j=0 ; j < keydefs[i].keysegs-ft_segs ; j++)
      if (mi_keyseg_write(file, &keydefs[i].seg[j]))
	goto err;
573
    for (j=0 ; j < ft_segs ; j++)
574 575 576 577
    {
      MI_KEYSEG seg=ft_keysegs[j];
      seg.language= keydefs[i].seg[0].language;
      if (mi_keyseg_write(file, &seg))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
578
        goto err;
579
    }
bk@work.mysql.com's avatar
bk@work.mysql.com committed
580 581 582 583 584 585 586 587 588
  }
  /* Create extra keys for unique definitions */
  offset=reclength-uniques*MI_UNIQUE_HASH_LENGTH;
  bzero((char*) &tmp_keydef,sizeof(tmp_keydef));
  bzero((char*) &tmp_keyseg,sizeof(tmp_keyseg));
  for (i=0; i < uniques ; i++)
  {
    tmp_keydef.keysegs=1;
    tmp_keydef.flag=		HA_UNIQUE_CHECK;
589
    tmp_keydef.block_length=	myisam_block_size;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
590 591
    tmp_keydef.keylength=	MI_UNIQUE_HASH_LENGTH + pointer;
    tmp_keydef.minlength=tmp_keydef.maxlength=tmp_keydef.keylength;
592 593
    tmp_keyseg.type=		MI_UNIQUE_HASH_TYPE;
    tmp_keyseg.length=		MI_UNIQUE_HASH_LENGTH;
bk@work.mysql.com's avatar
bk@work.mysql.com committed
594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625
    tmp_keyseg.start=		offset;
    offset+=			MI_UNIQUE_HASH_LENGTH;
    if (mi_keydef_write(file,&tmp_keydef) ||
	mi_keyseg_write(file,(&tmp_keyseg)))
      goto err;
  }

  /* Save unique definition */
  for (i=0 ; i < share.state.header.uniques ; i++)
  {
    if (mi_uniquedef_write(file, &uniquedefs[i]))
      goto err;
    for (j=0 ; j < uniquedefs[i].keysegs ; j++)
    {
      if (mi_keyseg_write(file, &uniquedefs[i].seg[j]))
	goto err;
    }
  }
  for (i=0 ; i < share.base.fields ; i++)
    if (mi_recinfo_write(file, &recinfo[i]))
      goto err;

#ifndef DBUG_OFF
  if ((uint) my_tell(file,MYF(0)) != info_length)
  {
    uint pos= (uint) my_tell(file,MYF(0));
    DBUG_PRINT("warning",("info_length: %d  != used_length: %d",
			  info_length, pos));
  }
#endif

	/* Enlarge files */
626
  if (my_chsize(file,(ulong) share.base.keystart,0,MYF(0)))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
627 628 629 630 631
    goto err;

  if (! (flags & HA_DONT_TOUCH_DATA))
  {
#ifdef USE_RELOC
632
    if (my_chsize(dfile,share.base.min_pack_length*ci->reloc_rows,0,MYF(0)))
bk@work.mysql.com's avatar
bk@work.mysql.com committed
633 634 635 636 637 638 639 640 641 642
      goto err;
#endif
    errpos=2;
    if (my_close(dfile,MYF(0)))
      goto err;
  }
  errpos=0;
  pthread_mutex_unlock(&THR_LOCK_myisam);
  if (my_close(file,MYF(0)))
    goto err;
643
  my_free((char*) rec_per_key_part,MYF(0));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
644 645 646 647 648 649 650 651 652 653 654
  DBUG_RETURN(0);

err:
  pthread_mutex_unlock(&THR_LOCK_myisam);
  save_errno=my_errno;
  switch (errpos) {
  case 3:
    VOID(my_close(dfile,MYF(0)));
    /* fall through */
  case 2:
    /* QQ: Tnu should add a call to my_raid_delete() here */
655 656 657
  if (! (flags & HA_DONT_TOUCH_DATA))
    my_delete_with_symlink(fn_format(filename,name,"",MI_NAME_DEXT,2+4),
			   MYF(0));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
658 659 660 661
    /* fall through */
  case 1:
    VOID(my_close(file,MYF(0)));
    if (! (flags & HA_DONT_TOUCH_DATA))
662 663
      my_delete_with_symlink(fn_format(filename,name,"",MI_NAME_IEXT,2+4),
			     MYF(0));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
664
  }
665
  my_free((char*) rec_per_key_part, MYF(0));
bk@work.mysql.com's avatar
bk@work.mysql.com committed
666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690
  DBUG_RETURN(my_errno=save_errno);		/* return the fatal errno */
}


uint mi_get_pointer_length(ulonglong file_length, uint def)
{
  if (file_length)				/* If not default */
  {
    if (file_length >= (longlong) 1 << 56)
      def=8;
    if (file_length >= (longlong) 1 << 48)
      def=7;
    if (file_length >= (longlong) 1 << 40)
      def=6;
    else if (file_length >= (longlong) 1 << 32)
      def=5;
    else if (file_length >= (1L << 24))
      def=4;
    else if (file_length >= (1L << 16))
      def=3;
    else
      def=2;
  }
  return def;
}