-
Notifications
You must be signed in to change notification settings - Fork 4k
/
Copy pathmyisamchk.cc
1683 lines (1583 loc) · 65.5 KB
/
myisamchk.cc
1
2
3
4
5
6
7
8
9
10
11
12
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
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
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
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
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
230
231
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
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
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
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
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
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
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
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/* Copyright (c) 2000, 2025, Oracle and/or its affiliates.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2.0,
as published by the Free Software Foundation.
This program is designed to work with certain software (including
but not limited to OpenSSL) that is licensed under separate terms,
as designated in a particular file or component or in included license
documentation. The authors of MySQL hereby grant you an additional
permission to link the program and your derivative works with the
separately licensed software that they have either included with
the program or referenced in the documentation.
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, version 2.0, 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 02110-1301 USA */
/* Describe, check and repair of MyISAM tables */
#include "my_config.h"
#include <assert.h>
#include <errno.h>
#include <fcntl.h>
#include <limits.h>
#include <stdarg.h>
#include <stdlib.h>
#include <sys/types.h>
#include <time.h>
#include <bit>
#include "m_string.h"
#include "my_byteorder.h"
#include "my_compiler.h"
#include "my_dbug.h"
#include "my_default.h"
#include "my_getopt.h"
#include "my_inttypes.h"
#include "my_io.h"
#include "my_macros.h"
#include "my_systime.h" // get_date
#include "mysql/strings/int2str.h"
#include "mysql/strings/m_ctype.h"
#include "nulls.h"
#include "print_version.h"
#include "storage/myisam/fulltext.h"
#include "storage/myisam/myisam_sys.h"
#include "storage/myisam/myisamdef.h"
#include "typelib.h"
#include "welcome_copyright_notice.h" // ORACLE_WELCOME_COPYRIGHT_NOTICE
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif
static uint decode_bits;
static const char *load_default_groups[] = {"myisamchk", nullptr};
static const char *set_collation_name, *opt_tmpdir;
static CHARSET_INFO *set_collation;
static long opt_myisam_block_size;
static long opt_key_cache_block_size;
static const char *my_progname_short;
static int stopwords_inited = 0;
static MY_TMPDIR myisamchk_tmpdir;
static const char *type_names[] = {"impossible",
"char",
"binary",
"short",
"long",
"float",
"double",
"number",
"unsigned short",
"unsigned long",
"longlong",
"ulonglong",
"int24",
"uint24",
"int8",
"varchar",
"varbin",
"?",
"?"};
static const char *prefix_packed_txt = "packed ", *bin_packed_txt = "prefix ",
*diff_txt = "stripped ", *null_txt = "NULL",
*blob_txt = "BLOB ";
static const char *field_pack[] = {"",
"no endspace",
"no prespace",
"no zeros",
"blob",
"constant",
"table-lockup",
"always zero",
"varchar",
"unique-hash",
"?",
"?"};
static const char *myisam_stats_method_str = "nulls_unequal";
static void get_options(int *argc, char ***argv, MEM_ROOT *alloc);
static void usage(void);
static int myisamchk(MI_CHECK *param, char *filename);
static void descript(MI_CHECK *param, MI_INFO *info, char *name);
static int mi_sort_records(MI_CHECK *param, MI_INFO *info, char *name,
uint sort_key, bool write_info, bool update_index);
static int sort_record_index(MI_SORT_PARAM *sort_param, MI_INFO *info,
MI_KEYDEF *keyinfo, my_off_t page, uchar *buff,
uint sortkey, File new_file, bool update_index);
MI_CHECK check_param;
/* myisamchk can create multiple threads (see sort.c) */
extern st_keycache_thread_var *keycache_thread_var() { return keycache_tls; }
/* Main program */
int main(int argc, char **argv) {
int error;
MY_INIT(argv[0]);
memset(&main_thread_keycache_var, 0, sizeof(st_keycache_thread_var));
mysql_cond_init(PSI_NOT_INSTRUMENTED, &main_thread_keycache_var.suspend);
keycache_tls = &main_thread_keycache_var;
my_progname_short = my_progname + dirname_length(my_progname);
myisamchk_init(&check_param);
check_param.using_global_keycache = false;
MEM_ROOT alloc{PSI_NOT_INSTRUMENTED, 512};
get_options(&argc, (char ***)&argv, &alloc);
myisam_quick_table_bits = decode_bits;
error = 0;
while (--argc >= 0) {
int new_error = myisamchk(&check_param, *(argv++));
if ((check_param.testflag & T_REP_ANY) != T_REP)
check_param.testflag &= ~T_REP;
(void)fflush(stdout);
(void)fflush(stderr);
if ((check_param.error_printed | check_param.warning_printed) &&
(check_param.testflag & T_FORCE_CREATE) &&
(!(check_param.testflag &
(T_REP | T_REP_BY_SORT | T_SORT_RECORDS | T_SORT_INDEX)))) {
uint old_testflag = check_param.testflag;
if (!(check_param.testflag & T_REP))
check_param.testflag |= T_REP_BY_SORT;
check_param.testflag &= ~T_EXTEND; /* Don't needed */
error |= myisamchk(&check_param, argv[-1]);
check_param.testflag = old_testflag;
(void)fflush(stdout);
(void)fflush(stderr);
} else
error |= new_error;
if (argc &&
(!(check_param.testflag & T_SILENT) || check_param.testflag & T_INFO)) {
puts("\n---------\n");
(void)fflush(stdout);
}
}
if (check_param.total_files > 1) { /* Only if descript */
char buff[22], buff2[22];
if (!(check_param.testflag & T_SILENT) || check_param.testflag & T_INFO)
puts("\n---------\n");
printf(
"\nTotal of all %d MyISAM-files:\nData records: %9s Deleted blocks: "
"%9s\n",
check_param.total_files, llstr(check_param.total_records, buff),
llstr(check_param.total_deleted, buff2));
}
free_tmpdir(&myisamchk_tmpdir);
ft_free_stopwords();
my_end(check_param.testflag & T_INFO ? MY_CHECK_ERROR | MY_GIVE_INFO
: MY_CHECK_ERROR);
mysql_cond_destroy(&main_thread_keycache_var.suspend);
exit(error);
} /* main */
enum options_mc {
OPT_CHARSETS_DIR = 256,
OPT_SET_COLLATION,
OPT_START_CHECK_POS,
OPT_CORRECT_CHECKSUM,
OPT_KEY_BUFFER_SIZE,
OPT_KEY_CACHE_BLOCK_SIZE,
OPT_MYISAM_BLOCK_SIZE,
OPT_READ_BUFFER_SIZE,
OPT_WRITE_BUFFER_SIZE,
OPT_SORT_BUFFER_SIZE,
OPT_SORT_KEY_BLOCKS,
OPT_DECODE_BITS,
OPT_FT_MIN_WORD_LEN,
OPT_FT_MAX_WORD_LEN,
OPT_FT_STOPWORD_FILE,
OPT_MAX_RECORD_LENGTH,
OPT_STATS_METHOD
};
static struct my_option my_long_options[] = {
{"analyze", 'a',
"Analyze distribution of keys. Will make some joins in MySQL faster. You "
"can check the calculated distribution.",
nullptr, nullptr, nullptr, GET_NO_ARG, NO_ARG, 0, 0, 0, nullptr, 0,
nullptr},
{"block-search", 'b', "No help available.", nullptr, nullptr, nullptr,
GET_ULONG, REQUIRED_ARG, 0, 0, 0, nullptr, 0, nullptr},
{"backup", 'B', "Make a backup of the .MYD file as 'filename-time.BAK'.",
nullptr, nullptr, nullptr, GET_NO_ARG, NO_ARG, 0, 0, 0, nullptr, 0,
nullptr},
{"character-sets-dir", OPT_CHARSETS_DIR,
"Directory where character sets are.", &charsets_dir, nullptr, nullptr,
GET_STR, REQUIRED_ARG, 0, 0, 0, nullptr, 0, nullptr},
{"check", 'c', "Check table for errors.", nullptr, nullptr, nullptr,
GET_NO_ARG, NO_ARG, 0, 0, 0, nullptr, 0, nullptr},
{"check-only-changed", 'C',
"Check only tables that have changed since last check. It also applies to "
"other requested actions (e.g. --analyze will be ignored if the table is "
"already analyzed).",
nullptr, nullptr, nullptr, GET_NO_ARG, NO_ARG, 0, 0, 0, nullptr, 0,
nullptr},
{"correct-checksum", OPT_CORRECT_CHECKSUM,
"Correct checksum information for table.", nullptr, nullptr, nullptr,
GET_NO_ARG, NO_ARG, 0, 0, 0, nullptr, 0, nullptr},
#ifdef NDEBUG
{"debug", '#', "This is a non-debug version. Catch this and exit.", nullptr,
nullptr, nullptr, GET_DISABLED, OPT_ARG, 0, 0, 0, nullptr, 0, nullptr},
#else
{"debug", '#', "Output debug log. Often this is 'd:t:o,filename'.", nullptr,
nullptr, nullptr, GET_STR, OPT_ARG, 0, 0, 0, nullptr, 0, nullptr},
#endif
{"description", 'd', "Prints some information about table.", nullptr,
nullptr, nullptr, GET_NO_ARG, NO_ARG, 0, 0, 0, nullptr, 0, nullptr},
{"data-file-length", 'D',
"Max length of data file (when recreating data-file when it's full).",
&check_param.max_data_file_length, &check_param.max_data_file_length,
nullptr, GET_LL, REQUIRED_ARG, 0, 0, 0, nullptr, 0, nullptr},
{"extend-check", 'e',
"If used when checking a table, ensure that the table is 100 percent "
"consistent, which will take a long time. If used when repairing a table, "
"try to recover every possible row from the data file. Normally this will "
"also find a lot of garbage rows; Don't use this option with repair if "
"you are not totally desperate.",
nullptr, nullptr, nullptr, GET_NO_ARG, NO_ARG, 0, 0, 0, nullptr, 0,
nullptr},
{"fast", 'F',
"Check only tables that haven't been closed properly. It also applies to "
"other requested actions (e.g. --analyze will be ignored if the table is "
"already analyzed).",
nullptr, nullptr, nullptr, GET_NO_ARG, NO_ARG, 0, 0, 0, nullptr, 0,
nullptr},
{"force", 'f',
"Restart with -r if there are any errors in the table. States will be "
"updated as with --update-state.",
nullptr, nullptr, nullptr, GET_NO_ARG, NO_ARG, 0, 0, 0, nullptr, 0,
nullptr},
{"HELP", 'H', "Display this help and exit.", nullptr, nullptr, nullptr,
GET_NO_ARG, NO_ARG, 0, 0, 0, nullptr, 0, nullptr},
{"help", '?', "Display this help and exit.", nullptr, nullptr, nullptr,
GET_NO_ARG, NO_ARG, 0, 0, 0, nullptr, 0, nullptr},
{"information", 'i',
"Print statistics information about table that is checked.", nullptr,
nullptr, nullptr, GET_NO_ARG, NO_ARG, 0, 0, 0, nullptr, 0, nullptr},
{"keys-used", 'k',
"Tell MyISAM to update only some specific keys. # is a bit mask of which "
"keys to use. This can be used to get faster inserts.",
&check_param.keys_in_use, &check_param.keys_in_use, nullptr, GET_ULL,
REQUIRED_ARG, -1, 0, 0, nullptr, 0, nullptr},
{"max-record-length", OPT_MAX_RECORD_LENGTH,
"Skip rows bigger than this if myisamchk can't allocate memory to hold it",
&check_param.max_record_length, &check_param.max_record_length, nullptr,
GET_ULL, REQUIRED_ARG, LLONG_MAX, 0, LLONG_MAX, nullptr, 0, nullptr},
{"medium-check", 'm',
"Faster than extend-check, but only finds 99.99% of all errors. Should be "
"good enough for most cases.",
nullptr, nullptr, nullptr, GET_NO_ARG, NO_ARG, 0, 0, 0, nullptr, 0,
nullptr},
{"quick", 'q', "Faster repair by not modifying the data file.", nullptr,
nullptr, nullptr, GET_NO_ARG, NO_ARG, 0, 0, 0, nullptr, 0, nullptr},
{"read-only", 'T', "Don't mark table as checked.", nullptr, nullptr,
nullptr, GET_NO_ARG, NO_ARG, 0, 0, 0, nullptr, 0, nullptr},
{"recover", 'r',
"Can fix almost anything except unique keys that aren't unique.", nullptr,
nullptr, nullptr, GET_NO_ARG, NO_ARG, 0, 0, 0, nullptr, 0, nullptr},
{"safe-recover", 'o',
"Uses old recovery method; Slower than '-r' but can handle a couple of "
"cases where '-r' reports that it can't fix the data file.",
nullptr, nullptr, nullptr, GET_NO_ARG, NO_ARG, 0, 0, 0, nullptr, 0,
nullptr},
{"sort-recover", 'n',
"Force recovering with sorting even if the temporary file was very big.",
nullptr, nullptr, nullptr, GET_NO_ARG, NO_ARG, 0, 0, 0, nullptr, 0,
nullptr},
#ifdef DEBUG
{"start-check-pos", OPT_START_CHECK_POS, "No help available.", 0, 0, 0,
GET_ULL, REQUIRED_ARG, 0, 0, 0, 0, 0, 0},
#endif
{"set-auto-increment", 'A',
"Force auto_increment to start at this or higher value. If no value is "
"given, then sets the next auto_increment value to the highest used value "
"for the auto key + 1.",
&check_param.auto_increment_value, &check_param.auto_increment_value,
nullptr, GET_ULL, OPT_ARG, 0, 0, 0, nullptr, 0, nullptr},
{"set-collation", OPT_SET_COLLATION,
"Change the collation used by the index", &set_collation_name, nullptr,
nullptr, GET_STR, REQUIRED_ARG, 0, 0, 0, nullptr, 0, nullptr},
{"silent", 's',
"Only print errors. One can use two -s to make myisamchk very silent.",
nullptr, nullptr, nullptr, GET_NO_ARG, NO_ARG, 0, 0, 0, nullptr, 0,
nullptr},
{"sort-index", 'S',
"Sort index blocks. This speeds up 'read-next' in applications.", nullptr,
nullptr, nullptr, GET_NO_ARG, NO_ARG, 0, 0, 0, nullptr, 0, nullptr},
{"sort-records", 'R',
"Sort records according to an index. This makes your data much more "
"localized and may speed up things. (It may be VERY slow to do a sort the "
"first time!)",
&check_param.opt_sort_key, &check_param.opt_sort_key, nullptr, GET_UINT,
REQUIRED_ARG, 0, 0, 0, nullptr, 0, nullptr},
{"tmpdir", 't', "Path for temporary files.", &opt_tmpdir, nullptr, nullptr,
GET_STR, REQUIRED_ARG, 0, 0, 0, nullptr, 0, nullptr},
{"update-state", 'U', "Mark tables as crashed if any errors were found.",
nullptr, nullptr, nullptr, GET_NO_ARG, NO_ARG, 0, 0, 0, nullptr, 0,
nullptr},
{"unpack", 'u', "Unpack file packed with myisampack.", nullptr, nullptr,
nullptr, GET_NO_ARG, NO_ARG, 0, 0, 0, nullptr, 0, nullptr},
{"verbose", 'v',
"Print more information. This can be used with --description and --check. "
"Use many -v for more verbosity!",
nullptr, nullptr, nullptr, GET_NO_ARG, NO_ARG, 0, 0, 0, nullptr, 0,
nullptr},
{"version", 'V', "Print version and exit.", nullptr, nullptr, nullptr,
GET_NO_ARG, NO_ARG, 0, 0, 0, nullptr, 0, nullptr},
{"wait", 'w', "Wait if table is locked.", nullptr, nullptr, nullptr,
GET_NO_ARG, NO_ARG, 0, 0, 0, nullptr, 0, nullptr},
{"key_buffer_size", OPT_KEY_BUFFER_SIZE, "", &check_param.use_buffers,
&check_param.use_buffers, nullptr, GET_ULL, REQUIRED_ARG, USE_BUFFER_INIT,
MALLOC_OVERHEAD, SIZE_T_MAX, nullptr, IO_SIZE, nullptr},
{"key_cache_block_size", OPT_KEY_CACHE_BLOCK_SIZE, "",
&opt_key_cache_block_size, &opt_key_cache_block_size, nullptr, GET_LONG,
REQUIRED_ARG, MI_KEY_BLOCK_LENGTH, MI_MIN_KEY_BLOCK_LENGTH,
MI_MAX_KEY_BLOCK_LENGTH, nullptr, MI_MIN_KEY_BLOCK_LENGTH, nullptr},
{"myisam_block_size", OPT_MYISAM_BLOCK_SIZE, "", &opt_myisam_block_size,
&opt_myisam_block_size, nullptr, GET_LONG, REQUIRED_ARG,
MI_KEY_BLOCK_LENGTH, MI_MIN_KEY_BLOCK_LENGTH, MI_MAX_KEY_BLOCK_LENGTH,
nullptr, MI_MIN_KEY_BLOCK_LENGTH, nullptr},
{"read_buffer_size", OPT_READ_BUFFER_SIZE, "",
&check_param.read_buffer_length, &check_param.read_buffer_length, nullptr,
GET_ULONG, REQUIRED_ARG, (long)READ_BUFFER_INIT, (long)MALLOC_OVERHEAD,
INT_MAX32, nullptr, (long)1L, nullptr},
{"write_buffer_size", OPT_WRITE_BUFFER_SIZE, "",
&check_param.write_buffer_length, &check_param.write_buffer_length,
nullptr, GET_ULONG, REQUIRED_ARG, (long)READ_BUFFER_INIT,
(long)MALLOC_OVERHEAD, INT_MAX32, nullptr, (long)1L, nullptr},
{"sort_buffer_size", OPT_SORT_BUFFER_SIZE,
"Deprecated. myisam_sort_buffer_size alias is being used",
&check_param.sort_buffer_length, &check_param.sort_buffer_length, nullptr,
GET_ULL, REQUIRED_ARG, (long)SORT_BUFFER_INIT,
(long)(MIN_SORT_BUFFER + MALLOC_OVERHEAD), SIZE_T_MAX, nullptr, (long)1L,
nullptr},
{"myisam_sort_buffer_size", OPT_SORT_BUFFER_SIZE,
"Alias of sort_buffer_size parameter", &check_param.sort_buffer_length,
&check_param.sort_buffer_length, nullptr, GET_ULL, REQUIRED_ARG,
(long)SORT_BUFFER_INIT, (long)(MIN_SORT_BUFFER + MALLOC_OVERHEAD),
SIZE_T_MAX, nullptr, (long)1L, nullptr},
{"sort_key_blocks", OPT_SORT_KEY_BLOCKS, "", &check_param.sort_key_blocks,
&check_param.sort_key_blocks, nullptr, GET_ULONG, REQUIRED_ARG,
BUFFERS_WHEN_SORTING, 4L, 100L, nullptr, 1L, nullptr},
{"decode_bits", OPT_DECODE_BITS, "", &decode_bits, &decode_bits, nullptr,
GET_UINT, REQUIRED_ARG, 9L, 4L, 17L, nullptr, 1L, nullptr},
{"ft_min_word_len", OPT_FT_MIN_WORD_LEN, "", &ft_min_word_len,
&ft_min_word_len, nullptr, GET_ULONG, REQUIRED_ARG, 4, 1, HA_FT_MAXCHARLEN,
nullptr, 1, nullptr},
{"ft_max_word_len", OPT_FT_MAX_WORD_LEN, "", &ft_max_word_len,
&ft_max_word_len, nullptr, GET_ULONG, REQUIRED_ARG, HA_FT_MAXCHARLEN, 10,
HA_FT_MAXCHARLEN, nullptr, 1, nullptr},
{"ft_stopword_file", OPT_FT_STOPWORD_FILE,
"Use stopwords from this file instead of built-in list.",
&ft_stopword_file, &ft_stopword_file, nullptr, GET_STR, REQUIRED_ARG, 0, 0,
0, nullptr, 0, nullptr},
{"stats_method", OPT_STATS_METHOD,
"Specifies how index statistics collection code should treat NULLs. "
"Possible values of name are \"nulls_unequal\" (default behavior for "
"4.1/5.0), "
"\"nulls_equal\" (emulate 4.0 behavior), and \"nulls_ignored\".",
&myisam_stats_method_str, &myisam_stats_method_str, nullptr, GET_STR,
REQUIRED_ARG, 0, 0, 0, nullptr, 0, nullptr},
{nullptr, 0, nullptr, nullptr, nullptr, nullptr, GET_NO_ARG, NO_ARG, 0, 0,
0, nullptr, 0, nullptr}};
static void usage(void) {
print_version();
puts(ORACLE_WELCOME_COPYRIGHT_NOTICE("2000"));
puts("Description, check and repair of MyISAM tables.");
puts(
"Used without options all tables on the command will be checked for "
"errors");
printf("Usage: %s [OPTIONS] tables[.MYI]\n", my_progname_short);
printf("\nGlobal options:\n");
#ifndef NDEBUG
printf(
"\
-#, --debug=... Output debug log. Often this is 'd:t:o,filename'.\n");
#endif
printf(
"\
-H, --HELP Display this help and exit.\n\
-?, --help Display this help and exit.\n\
-t, --tmpdir=path Path for temporary files. Multiple paths can be\n\
specified, separated by ");
#if defined(_WIN32)
printf("semicolon (;)");
#else
printf("colon (:)");
#endif
printf(
", they will be used\n\
in a round-robin fashion.\n\
-s, --silent Only print errors. One can use two -s to make\n\
myisamchk very silent.\n\
-v, --verbose Print more information. This can be used with\n\
--description and --check. Use many -v for more verbosity.\n\
-V, --version Print version and exit.\n\
-w, --wait Wait if table is locked.\n\n");
#ifdef DEBUG
puts(" --start-check-pos=# Start reading file at given offset.\n");
#endif
puts(
"Check options (check is the default action for myisamchk):\n\
-c, --check Check table for errors.\n\
-e, --extend-check Check the table VERY thoroughly. Only use this in\n\
extreme cases as myisamchk should normally be able to\n\
find out if the table is ok even without this switch.\n\
-F, --fast Check only tables that haven't been closed properly.\n\
-C, --check-only-changed\n\
Check only tables that have changed since last check.\n\
-f, --force Restart with '-r' if there are any errors in the table.\n\
States will be updated as with '--update-state'.\n\
-i, --information Print statistics information about table that is checked.\n\
-m, --medium-check Faster than extend-check, but only finds 99.99% of\n\
all errors. Should be good enough for most cases.\n\
-U --update-state Mark tables as crashed if you find any errors.\n\
-T, --read-only Don't mark table as checked.\n");
puts(
"Repair options (When using '-r' or '-o'):\n\
-B, --backup Make a backup of the .MYD file as 'filename-time.BAK'.\n\
--correct-checksum Correct checksum information for table.\n\
-D, --data-file-length=# Max length of data file (when recreating data\n\
file when it's full).\n\
-e, --extend-check Try to recover every possible row from the data file\n\
Normally this will also find a lot of garbage rows;\n\
Don't use this option if you are not totally desperate.\n\
-f, --force Overwrite old temporary files.\n\
-k, --keys-used=# Tell MyISAM to update only some specific keys. # is a\n\
bit mask of which keys to use. This can be used to\n\
get faster inserts.\n\
--max-record-length=#\n\
Skip rows bigger than this if myisamchk can't allocate\n\
memory to hold it.\n\
-r, --recover Can fix almost anything except unique keys that aren't\n\
unique.\n\
-n, --sort-recover Forces recovering with sorting even if the temporary\n\
file would be very big.\n\
-o, --safe-recover Uses old recovery method; Slower than '-r' but can\n\
handle a couple of cases where '-r' reports that it\n\
can't fix the data file.\n\
--character-sets-dir=...\n\
Directory where character sets are.\n\
--set-collation=name\n\
Change the collation used by the index.\n\
-q, --quick Faster repair by not modifying the data file.\n\
One can give a second '-q' to force myisamchk to\n\
modify the original datafile in case of duplicate keys.\n\
NOTE: Tables where the data file is corrupted can't be\n\
fixed with this option.\n\
-u, --unpack Unpack file packed with myisampack.\n\
");
puts(
"Other actions:\n\
-a, --analyze Analyze distribution of keys. Will make some joins in\n\
MySQL faster. You can check the calculated distribution\n\
by using '--description --verbose table_name'.\n\
--stats_method=name Specifies how index statistics collection code should\n\
treat NULLs. Possible values of name are \"nulls_unequal\"\n\
(default for 4.1/5.0), \"nulls_equal\" (emulate 4.0), and \n\
\"nulls_ignored\".\n\
-d, --description Prints some information about table.\n\
-A, --set-auto-increment[=value]\n\
Force auto_increment to start at this or higher value\n\
If no value is given, then sets the next auto_increment\n\
value to the highest used value for the auto key + 1.\n\
-S, --sort-index Sort index blocks. This speeds up 'read-next' in\n\
applications.\n\
-R, --sort-records=#\n\
Sort records according to an index. This makes your\n\
data much more localized and may speed up things\n\
(It may be VERY slow to do a sort the first time!).\n\
-b, --block-search=#\n\
Find a record, a block at given offset belongs to.");
print_defaults("my", load_default_groups);
my_print_variables(my_long_options);
}
const char *myisam_stats_method_names[] = {"nulls_unequal", "nulls_equal",
"nulls_ignored", NullS};
TYPELIB myisam_stats_method_typelib = {
array_elements(myisam_stats_method_names) - 1, "",
myisam_stats_method_names, nullptr};
/* Read options */
static bool get_one_option(int optid,
const struct my_option *opt [[maybe_unused]],
char *argument) {
switch (optid) {
case 'a':
if (argument == disabled_my_option)
check_param.testflag &= ~T_STATISTICS;
else
check_param.testflag |= T_STATISTICS;
break;
case 'A':
if (argument)
check_param.auto_increment_value = my_strtoull(argument, nullptr, 0);
else
check_param.auto_increment_value = 0; /* Set to max used value */
check_param.testflag |= T_AUTO_INC;
break;
case 'b':
check_param.search_after_block = strtoul(argument, nullptr, 10);
break;
case 'B':
if (argument == disabled_my_option)
check_param.testflag &= ~T_BACKUP_DATA;
else
check_param.testflag |= T_BACKUP_DATA;
break;
case 'c':
if (argument == disabled_my_option)
check_param.testflag &= ~T_CHECK;
else
check_param.testflag |= T_CHECK;
break;
case 'C':
if (argument == disabled_my_option)
check_param.testflag &= ~(T_CHECK | T_CHECK_ONLY_CHANGED);
else
check_param.testflag |= T_CHECK | T_CHECK_ONLY_CHANGED;
break;
case 'D':
check_param.max_data_file_length = my_strtoll(argument, nullptr, 10);
break;
case 's': /* silent */
if (argument == disabled_my_option)
check_param.testflag &= ~(T_SILENT | T_VERY_SILENT);
else {
if (check_param.testflag & T_SILENT)
check_param.testflag |= T_VERY_SILENT;
check_param.testflag |= T_SILENT;
check_param.testflag &= ~T_WRITE_LOOP;
}
break;
case 'w':
if (argument == disabled_my_option)
check_param.testflag &= ~T_WAIT_FOREVER;
else
check_param.testflag |= T_WAIT_FOREVER;
break;
case 'd': /* description if isam-file */
if (argument == disabled_my_option)
check_param.testflag &= ~T_DESCRIPT;
else
check_param.testflag |= T_DESCRIPT;
break;
case 'e': /* extend check */
if (argument == disabled_my_option)
check_param.testflag &= ~T_EXTEND;
else
check_param.testflag |= T_EXTEND;
break;
case 'i':
if (argument == disabled_my_option)
check_param.testflag &= ~T_INFO;
else
check_param.testflag |= T_INFO;
break;
case 'f':
if (argument == disabled_my_option) {
check_param.tmpfile_createflag = O_RDWR | O_TRUNC | O_EXCL;
check_param.testflag &= ~(T_FORCE_CREATE | T_UPDATE_STATE);
} else {
check_param.tmpfile_createflag = O_RDWR | O_TRUNC;
check_param.testflag |= T_FORCE_CREATE | T_UPDATE_STATE;
}
break;
case 'F':
if (argument == disabled_my_option)
check_param.testflag &= ~T_FAST;
else
check_param.testflag |= T_FAST;
break;
case 'k':
check_param.keys_in_use = (ulonglong)my_strtoll(argument, nullptr, 10);
break;
case 'm':
if (argument == disabled_my_option)
check_param.testflag &= ~T_MEDIUM;
else
check_param.testflag |= T_MEDIUM; /* Medium check */
break;
case 'r': /* Repair table */
check_param.testflag &= ~T_REP_ANY;
if (argument != disabled_my_option) check_param.testflag |= T_REP_BY_SORT;
break;
case 'o':
check_param.testflag &= ~T_REP_ANY;
check_param.force_sort = false;
if (argument != disabled_my_option) {
check_param.testflag |= T_REP;
}
break;
case 'n':
check_param.testflag &= ~T_REP_ANY;
if (argument == disabled_my_option)
check_param.force_sort = false;
else {
check_param.testflag |= T_REP_BY_SORT;
check_param.force_sort = true;
}
break;
case 'q':
if (argument == disabled_my_option)
check_param.testflag &= ~(T_QUICK | T_FORCE_UNIQUENESS);
else
check_param.testflag |=
(check_param.testflag & T_QUICK) ? T_FORCE_UNIQUENESS : T_QUICK;
break;
case 'u':
if (argument == disabled_my_option)
check_param.testflag &= ~(T_UNPACK | T_REP_BY_SORT);
else
check_param.testflag |= T_UNPACK | T_REP_BY_SORT;
break;
case 'v': /* Verbose */
if (argument == disabled_my_option) {
check_param.testflag &= ~T_VERBOSE;
check_param.verbose = 0;
} else {
check_param.testflag |= T_VERBOSE;
check_param.verbose++;
}
break;
case 'R': /* Sort records */
if (argument == disabled_my_option)
check_param.testflag &= ~T_SORT_RECORDS;
else {
check_param.testflag |= T_SORT_RECORDS;
check_param.opt_sort_key = (uint)atoi(argument) - 1;
if (check_param.opt_sort_key >= MI_MAX_KEY) {
fprintf(stderr,
"The value of the sort key is bigger than max key: %d.\n",
MI_MAX_KEY);
exit(1);
}
}
break;
case 'S': /* Sort index */
if (argument == disabled_my_option)
check_param.testflag &= ~T_SORT_INDEX;
else
check_param.testflag |= T_SORT_INDEX;
break;
case 'T':
if (argument == disabled_my_option)
check_param.testflag &= ~T_READONLY;
else
check_param.testflag |= T_READONLY;
break;
case 'U':
if (argument == disabled_my_option)
check_param.testflag &= ~T_UPDATE_STATE;
else
check_param.testflag |= T_UPDATE_STATE;
break;
case '#':
if (argument == disabled_my_option) {
DBUG_POP();
} else {
DBUG_PUSH(argument ? argument : "d:t:o,/tmp/myisamchk.trace");
}
break;
case 'V':
print_version();
exit(0);
case OPT_CORRECT_CHECKSUM:
if (argument == disabled_my_option)
check_param.testflag &= ~T_CALC_CHECKSUM;
else
check_param.testflag |= T_CALC_CHECKSUM;
break;
case OPT_STATS_METHOD: {
int method;
enum_mi_stats_method method_conv = MI_STATS_METHOD_NULLS_NOT_EQUAL;
myisam_stats_method_str = argument;
if ((method = find_type(argument, &myisam_stats_method_typelib,
FIND_TYPE_BASIC)) <= 0) {
fprintf(stderr, "Invalid value of stats_method: %s.\n", argument);
exit(1);
}
switch (method - 1) {
case 0:
method_conv = MI_STATS_METHOD_NULLS_EQUAL;
break;
case 1:
method_conv = MI_STATS_METHOD_NULLS_NOT_EQUAL;
break;
case 2:
method_conv = MI_STATS_METHOD_IGNORE_NULLS;
break;
default:
assert(0); /* Impossible */
}
check_param.stats_method = method_conv;
break;
}
#ifdef DEBUG /* Only useful if debugging */
case OPT_START_CHECK_POS:
check_param.start_check_pos = my_strtoull(argument, NULL, 0);
break;
#endif
case 'H':
my_print_help(my_long_options);
exit(0);
case '?':
usage();
exit(0);
}
return false;
}
static void get_options(int *argc, char ***argv, MEM_ROOT *alloc) {
int ho_error;
if (load_defaults("my", load_default_groups, argc, argv, alloc)) exit(1);
if (isatty(fileno(stdout))) check_param.testflag |= T_WRITE_LOOP;
if ((ho_error = handle_options(argc, argv, my_long_options, get_one_option)))
exit(ho_error);
/* If using repair, then update checksum if one uses --update-state */
if ((check_param.testflag & T_UPDATE_STATE) &&
(check_param.testflag & T_REP_ANY))
check_param.testflag |= T_CALC_CHECKSUM;
if (*argc == 0) {
usage();
exit(1);
}
if ((check_param.testflag & T_UNPACK) &&
(check_param.testflag & (T_QUICK | T_SORT_RECORDS))) {
(void)fprintf(stderr,
"%s: --unpack can't be used with --quick or --sort-records\n",
my_progname_short);
exit(1);
}
if ((check_param.testflag & T_READONLY) &&
(check_param.testflag &
(T_REP_ANY | T_STATISTICS | T_AUTO_INC | T_SORT_RECORDS | T_SORT_INDEX |
T_FORCE_CREATE))) {
(void)fprintf(stderr,
"%s: Can't use --readonly when repairing or sorting\n",
my_progname_short);
exit(1);
}
if (init_tmpdir(&myisamchk_tmpdir, opt_tmpdir)) exit(1);
check_param.tmpdir = &myisamchk_tmpdir;
check_param.key_cache_block_size = opt_key_cache_block_size;
if (set_collation_name)
if (!(set_collation = get_charset_by_name(set_collation_name, MYF(MY_WME))))
exit(1);
myisam_block_size = std::bit_floor<unsigned>(opt_myisam_block_size);
return;
} /* get options */
/* Check table */
static int myisamchk(MI_CHECK *param, char *filename) {
int error, lock_type, recreate;
int rep_quick = param->testflag & (T_QUICK | T_FORCE_UNIQUENESS);
MI_INFO *info;
File datafile;
char llbuff[22], llbuff2[22];
bool state_updated = false;
MYISAM_SHARE *share;
DBUG_TRACE;
param->out_flag = error = param->warning_printed = param->error_printed =
recreate = 0;
datafile = 0;
param->isam_file_name = filename; /* For error messages */
if (!(info = mi_open(
filename,
(param->testflag & (T_DESCRIPT | T_READONLY)) ? O_RDONLY : O_RDWR,
HA_OPEN_FOR_REPAIR |
((param->testflag & T_WAIT_FOREVER) ? HA_OPEN_WAIT_IF_LOCKED
: (param->testflag & T_DESCRIPT)
? HA_OPEN_IGNORE_IF_LOCKED
: HA_OPEN_ABORT_IF_LOCKED)))) {
/* Avoid twice printing of isam file name */
param->error_printed = 1;
switch (my_errno()) {
case HA_ERR_CRASHED:
mi_check_print_error(param,
"'%s' doesn't have a correct index definition. "
"You need to recreate it before you can do a "
"repair",
filename);
break;
case HA_ERR_NOT_A_TABLE:
mi_check_print_error(param, "'%s' is not a MyISAM-table", filename);
break;
case HA_ERR_CRASHED_ON_USAGE:
mi_check_print_error(param, "'%s' is marked as crashed", filename);
break;
case HA_ERR_CRASHED_ON_REPAIR:
mi_check_print_error(
param, "'%s' is marked as crashed after last repair", filename);
break;
case HA_ERR_OLD_FILE:
mi_check_print_error(param, "'%s' is an old type of MyISAM-table",
filename);
break;
case HA_ERR_END_OF_FILE:
mi_check_print_error(param, "Couldn't read complete header from '%s'",
filename);
break;
case EAGAIN:
mi_check_print_error(
param, "'%s' is locked. Use -w to wait until unlocked", filename);
break;
case ENOENT:
mi_check_print_error(param, "File '%s' doesn't exist", filename);
break;
case EACCES:
mi_check_print_error(param, "You don't have permission to use '%s'",
filename);
break;
default:
mi_check_print_error(param, "%d when opening MyISAM-table '%s'",
my_errno(), filename);
break;
}
return 1;
}
share = info->s;
share->options &= ~HA_OPTION_READ_ONLY_DATA; /* We are modifying it */
share->tot_locks -= share->r_locks;
share->r_locks = 0;
/*
Skip the checking of the file if:
We are using --fast and the table is closed properly
We are using --check-only-changed-tables and the table hasn't changed
*/
if (param->testflag & (T_FAST | T_CHECK_ONLY_CHANGED)) {
bool need_to_check = mi_is_crashed(info) || share->state.open_count != 0;
if ((param->testflag & (T_REP_ANY | T_SORT_RECORDS)) &&
((share->state.changed &
(STATE_CHANGED | STATE_CRASHED | STATE_CRASHED_ON_REPAIR) ||
!(param->testflag & T_CHECK_ONLY_CHANGED))))
need_to_check = true;
if (info->s->base.keys && info->state->records) {
if ((param->testflag & T_STATISTICS) &&
(share->state.changed & STATE_NOT_ANALYZED))
need_to_check = true;
if ((param->testflag & T_SORT_INDEX) &&
(share->state.changed & STATE_NOT_SORTED_PAGES))
need_to_check = true;
if ((param->testflag & T_REP_BY_SORT) &&
(share->state.changed & STATE_NOT_OPTIMIZED_KEYS))
need_to_check = true;
}
if ((param->testflag & T_CHECK_ONLY_CHANGED) &&
(share->state.changed &
(STATE_CHANGED | STATE_CRASHED | STATE_CRASHED_ON_REPAIR)))
need_to_check = true;
if (!need_to_check) {
if (!(param->testflag & T_SILENT) || param->testflag & T_INFO)
printf("MyISAM file: %s is already checked\n", filename);
if (mi_close(info)) {
mi_check_print_error(param, "%d when closing MyISAM-table '%s'",
my_errno(), filename);
return 1;
}
return 0;
}
}
if ((param->testflag &
(T_REP_ANY | T_STATISTICS | T_SORT_RECORDS | T_SORT_INDEX)) &&
(((param->testflag & T_UNPACK) &&
share->data_file_type == COMPRESSED_RECORD) ||
mi_uint2korr(share->state.header.state_info_length) !=
MI_STATE_INFO_SIZE ||
mi_uint2korr(share->state.header.base_info_length) !=
MI_BASE_INFO_SIZE ||
mi_is_any_intersect_keys_active(param->keys_in_use, share->base.keys,
~share->state.key_map) ||
test_if_almost_full(info) ||
info->s->state.header.file_version[3] != myisam_file_magic[3] ||
(set_collation &&
set_collation->number != share->state.header.language) ||
myisam_block_size != MI_KEY_BLOCK_LENGTH)) {
if (set_collation) param->language = set_collation->number;
if (recreate_table(param, &info, filename)) {
(void)fprintf(stderr,
"MyISAM-table '%s' is not fixed because of errors\n",
filename);
return -1;
}
recreate = 1;
if (!(param->testflag & T_REP_ANY)) {
param->testflag |= T_REP_BY_SORT; /* if only STATISTICS */
if (!(param->testflag & T_SILENT))
printf("- '%s' has old table-format. Recreating index\n", filename);
rep_quick |= T_QUICK;
}
share = info->s;
share->tot_locks -= share->r_locks;
share->r_locks = 0;
}
if (param->testflag & T_DESCRIPT) {
param->total_files++;
param->total_records += info->state->records;
param->total_deleted += info->state->del;
descript(param, info, filename);
} else {
if (!stopwords_inited++) ft_init_stopwords();
if (!(param->testflag & T_READONLY))
lock_type = F_WRLCK; /* table is changed */
else
lock_type = F_RDLCK;
if (info->lock_type == F_RDLCK)
info->lock_type = F_UNLCK; /* Read only table */
if (_mi_readinfo(info, lock_type, 0)) {
mi_check_print_error(param, "Can't lock indexfile of '%s', error: %d",
filename, my_errno());
param->error_printed = 0;
goto end2;
}
/*
_mi_readinfo() has locked the table.
We mark the table as locked (without doing file locks) to be able to
use functions that only works on locked tables (like row caching).
*/
mi_lock_database(info, F_EXTRA_LCK);
datafile = info->dfile;
if (param->testflag & (T_REP_ANY | T_SORT_RECORDS | T_SORT_INDEX)) {
if (param->testflag & T_REP_ANY) {
ulonglong tmp = share->state.key_map;
mi_copy_keys_active(share->state.key_map, share->base.keys,
param->keys_in_use);
if (tmp != share->state.key_map) info->update |= HA_STATE_CHANGED;
}
if (rep_quick && chk_del(param, info, param->testflag & ~T_VERBOSE)) {
if (param->testflag & T_FORCE_CREATE) {
rep_quick = 0;
mi_check_print_info(param, "Creating new data file\n");
} else {
error = 1;
mi_check_print_error(
param, "Quick-recover aborted; Run recovery without switch 'q'");
}
}
if (!error) {
if ((param->testflag & T_REP_BY_SORT) &&
(mi_is_any_key_active(share->state.key_map) ||