summaryrefslogtreecommitdiffstats
path: root/storage/spider/spd_include.h
blob: 4763cd8915a70b23248d36b79afd4fb0c376887c (plain)
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
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
/* Copyright (C) 2008-2020 Kentoku Shiba
   Copyright (C) 2019-2022 MariaDB corp

  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 Street, Fifth Floor, Boston, MA 02110-1335 USA */

#define SPIDER_DETAIL_VERSION PACKAGE_VERSION
#define SPIDER_HEX_VERSION (MYSQL_VERSION_MAJOR << 8 | MYSQL_VERSION_MINOR)

#define spider_my_free(A,B) my_free(A)
#ifdef pthread_mutex_t
#undef pthread_mutex_t
#endif
#define pthread_mutex_t mysql_mutex_t
#ifdef pthread_mutex_lock
#undef pthread_mutex_lock
#endif
#define pthread_mutex_lock mysql_mutex_lock
#ifdef pthread_mutex_trylock
#undef pthread_mutex_trylock
#endif
#define pthread_mutex_trylock mysql_mutex_trylock
#ifdef pthread_mutex_unlock
#undef pthread_mutex_unlock
#endif
#define pthread_mutex_unlock mysql_mutex_unlock
#ifdef pthread_mutex_destroy
#undef pthread_mutex_destroy
#endif
#define pthread_mutex_destroy mysql_mutex_destroy
#define pthread_mutex_assert_owner(A) mysql_mutex_assert_owner(A)
#define pthread_mutex_assert_not_owner(A) mysql_mutex_assert_not_owner(A)
#ifdef pthread_cond_t
#undef pthread_cond_t
#endif
#define pthread_cond_t mysql_cond_t
#ifdef pthread_cond_wait
#undef pthread_cond_wait
#endif
#define pthread_cond_wait mysql_cond_wait
#ifdef pthread_cond_timedwait
#undef pthread_cond_timedwait
#endif
#define pthread_cond_timedwait mysql_cond_timedwait
#ifdef pthread_cond_signal
#undef pthread_cond_signal
#endif
#define pthread_cond_signal mysql_cond_signal
#ifdef pthread_cond_broadcast
#undef pthread_cond_broadcast
#endif
#define pthread_cond_broadcast mysql_cond_broadcast
#ifdef pthread_cond_destroy
#undef pthread_cond_destroy
#endif
#define pthread_cond_destroy mysql_cond_destroy
#define my_sprintf(A,B) sprintf B

#define spider_stmt_da_message(A) thd_get_error_message(A)
#define spider_stmt_da_sql_errno(A) thd_get_error_number(A)
#define spider_user_defined_key_parts(A) (A)->user_defined_key_parts
#define spider_join_table_count(A) (A)->table_count
#define SPIDER_CAN_BG_UPDATE (1LL << 39)
#define SPIDER_ALTER_PARTITION_ADD         ALTER_PARTITION_ADD
#define SPIDER_ALTER_PARTITION_DROP        ALTER_PARTITION_DROP
#define SPIDER_ALTER_PARTITION_COALESCE    ALTER_PARTITION_COALESCE
#define SPIDER_ALTER_PARTITION_REORGANIZE  ALTER_PARTITION_REORGANIZE
#define SPIDER_ALTER_PARTITION_TABLE_REORG ALTER_PARTITION_TABLE_REORG
#define SPIDER_ALTER_PARTITION_REBUILD     ALTER_PARTITION_REBUILD
#define SPIDER_WARN_LEVEL_WARN            Sql_condition::WARN_LEVEL_WARN
#define SPIDER_WARN_LEVEL_NOTE            Sql_condition::WARN_LEVEL_NOTE
#define SPIDER_THD_KILL_CONNECTION        KILL_CONNECTION

#define SPIDER_HAS_EXPLAIN_QUERY

#define SPIDER_TEST(A) MY_TEST(A)

#define SPIDER_FIELD_FIELDPTR_REQUIRES_THDPTR
#define SPIDER_ENGINE_CONDITION_PUSHDOWN_IS_ALWAYS_ON

#define SPIDER_Item_args_arg_count_IS_PROTECTED

#define SPIDER_Item_func_conv_charset_conv_charset collation.collation

#define SPIDER_WITHOUT_HA_STATISTIC_INCREMENT
#define SPIDER_init_read_record(A,B,C,D,E,F,G,H) init_read_record(A,B,C,D,E,F,G,H)
#define SPIDER_HAS_NEXT_THREAD_ID
#define SPIDER_new_THD(A) (new THD(A))
#define SPIDER_order_direction_is_asc(A) (A->direction == ORDER::ORDER_ASC)

#define SPIDER_open_temporary_table

#define SPIDER_generate_partition_syntax(A,B,C,D,E,F,G,H) generate_partition_syntax(A,B,C,E,F,G)

#define SPIDER_create_partition_name(A,B,C,D,E,F) create_partition_name(A,B,C,D,E,F)
#define SPIDER_create_subpartition_name(A,B,C,D,E,F) create_subpartition_name(A,B,C,D,E,F)
#define SPIDER_free_part_syntax(A,B)

#define SPIDER_read_record_read_record(A) read_record()
#define SPIDER_has_Item_with_subquery
#define SPIDER_use_LEX_CSTRING_for_Field_blob_constructor
#define SPIDER_use_LEX_CSTRING_for_database_tablename_alias
#define SPIDER_THD_db_str(A) (A)->db.str
#define SPIDER_THD_db_length(A) (A)->db.length
#define SPIDER_TABLE_LIST_db_str(A) (A)->db.str
#define SPIDER_TABLE_LIST_db_length(A) (A)->db.length
#define SPIDER_TABLE_LIST_table_name_str(A) (A)->table_name.str
#define SPIDER_TABLE_LIST_table_name_length(A) (A)->table_name.length
#define SPIDER_TABLE_LIST_alias_str(A) (A)->alias.str
#define SPIDER_TABLE_LIST_alias_length(A) (A)->alias.length
#define SPIDER_field_name_str(A) (A)->field_name.str
#define SPIDER_field_name_length(A) (A)->field_name.length
#define SPIDER_item_name_str(A) (A)->name.str
#define SPIDER_item_name_length(A) (A)->name.length
const LEX_CSTRING SPIDER_empty_string = {"", 0};

#define SPIDER_date_mode_t(A) date_mode_t(A)
#define SPIDER_str_to_datetime(A,B,C,D,E) str_to_datetime_or_date(A,B,C,D,E)
#define SPIDER_get_linkage(A) A->get_linkage()

typedef start_new_trans *SPIDER_Open_tables_backup;

#define SPIDER_reset_n_backup_open_tables_state(A,B,C) do { \
  if (!(*(B) = new start_new_trans(A))) \
  { \
    DBUG_RETURN(C); \
  } \
} while (0)
#define SPIDER_restore_backup_open_tables_state(A,B) do { \
  (*(B))->restore_old_transaction(); \
  delete *(B); \
} while (0)
#define SPIDER_sys_close_thread_tables(A) (A)->commit_whole_transaction_and_close_tables()

#define spider_bitmap_size(A) ((A + 7) / 8)
#define spider_set_bit(BITMAP, BIT) \
  ((BITMAP)[(BIT) / 8] |= (1 << ((BIT) & 7)))
#define spider_clear_bit(BITMAP, BIT) \
  ((BITMAP)[(BIT) / 8] &= ~(1 << ((BIT) & 7)))
#define spider_bit_is_set(BITMAP, BIT) \
  (uint) ((BITMAP)[(BIT) / 8] & (1 << ((BIT) & 7)))

#define SPIDER_LINK_STATUS_NO_CHANGE         0
#define SPIDER_LINK_STATUS_OK                1
#define SPIDER_LINK_STATUS_RECOVERY          2
#define SPIDER_LINK_STATUS_NG                3

#define SPIDER_LINK_MON_OK                   0
#define SPIDER_LINK_MON_NG                  -1
#define SPIDER_LINK_MON_DRAW_FEW_MON         1
#define SPIDER_LINK_MON_DRAW                 2

#define SPIDER_TMP_SHARE_CHAR_PTR_COUNT     23
#define SPIDER_TMP_SHARE_UINT_COUNT         SPIDER_TMP_SHARE_CHAR_PTR_COUNT
#define SPIDER_TMP_SHARE_LONG_COUNT         19
#define SPIDER_TMP_SHARE_LONGLONG_COUNT      3

#define SPIDER_MEM_CALC_LIST_NUM           314
#define SPIDER_CONN_META_BUF_LEN           64

#define SPIDER_BACKUP_DASTATUS \
  bool da_status; if (thd) da_status = thd->is_error(); else da_status = FALSE;
#define SPIDER_RESTORE_DASTATUS \
  if (!da_status && thd->is_error()) thd->clear_error();
#define SPIDER_CONN_RESTORE_DASTATUS \
  if (thd && conn->error_mode) {SPIDER_RESTORE_DASTATUS;}
#define SPIDER_CONN_RESTORE_DASTATUS_AND_RESET_ERROR_NUM \
  if (thd && conn->error_mode) {SPIDER_RESTORE_DASTATUS; error_num = 0;}
#define SPIDER_CONN_RESTORE_DASTATUS_AND_RESET_TMP_ERROR_NUM \
  if (thd && conn->error_mode) {SPIDER_RESTORE_DASTATUS; tmp_error_num = 0;}

#define SPIDER_SET_FILE_POS(A) \
  {(A)->thd = current_thd; (A)->func_name = __func__; (A)->file_name = __FILE__; (A)->line_no = __LINE__;}
#define SPIDER_CLEAR_FILE_POS(A) \
  {DBUG_PRINT("info", ("spider thd=%p func_name=%s file_name=%s line_no=%lu", (A)->thd, (A)->func_name ? (A)->func_name : "NULL", (A)->file_name ? (A)->file_name : "NULL", (A)->line_no)); (A)->thd = NULL; (A)->func_name = NULL; (A)->file_name = NULL; (A)->line_no = 0;}

class ha_spider;
typedef struct st_spider_share SPIDER_SHARE;
typedef struct st_spider_table_mon_list SPIDER_TABLE_MON_LIST;
typedef struct st_spider_ip_port_conn SPIDER_IP_PORT_CONN;

typedef struct st_spider_thread
{
  uint                  thread_idx;
  THD                   *thd;
  volatile bool         killed;
  volatile bool         thd_wait;
  volatile bool         first_free_wait;
  volatile int          error;
  pthread_t             thread;
  pthread_cond_t        cond;
  pthread_mutex_t       mutex;
  pthread_cond_t        sync_cond;
  volatile SPIDER_SHARE *queue_first;
  volatile SPIDER_SHARE *queue_last;
} SPIDER_THREAD;

typedef struct st_spider_file_pos
{
  THD                *thd;
  const char         *func_name;
  const char         *file_name;
  ulong              line_no;
} SPIDER_FILE_POS;

typedef struct st_spider_link_for_hash
{
  ha_spider          *spider;
  int                link_idx;
  spider_string      *db_table_str;
  my_hash_value_type db_table_str_hash_value;
} SPIDER_LINK_FOR_HASH;

/* alter table */
typedef struct st_spider_alter_table
{
  bool               now_create;
  char               *table_name;
  uint               table_name_length;
  char               *tmp_char;
  my_hash_value_type table_name_hash_value;
  longlong           tmp_priority;
  uint               link_count;
  uint               all_link_count;

  char               **tmp_server_names;
  char               **tmp_tgt_table_names;
  char               **tmp_tgt_dbs;
  char               **tmp_tgt_hosts;
  char               **tmp_tgt_usernames;
  char               **tmp_tgt_passwords;
  char               **tmp_tgt_sockets;
  char               **tmp_tgt_wrappers;
  char               **tmp_tgt_ssl_cas;
  char               **tmp_tgt_ssl_capaths;
  char               **tmp_tgt_ssl_certs;
  char               **tmp_tgt_ssl_ciphers;
  char               **tmp_tgt_ssl_keys;
  char               **tmp_tgt_default_files;
  char               **tmp_tgt_default_groups;
  char               **tmp_tgt_dsns;
  char               **tmp_tgt_filedsns;
  char               **tmp_tgt_drivers;
  char               **tmp_static_link_ids;
  long               *tmp_tgt_ports;
  long               *tmp_tgt_ssl_vscs;
  long               *tmp_monitoring_binlog_pos_at_failing;
  long               *tmp_link_statuses;

  uint               *tmp_server_names_lengths;
  uint               *tmp_tgt_table_names_lengths;
  uint               *tmp_tgt_dbs_lengths;
  uint               *tmp_tgt_hosts_lengths;
  uint               *tmp_tgt_usernames_lengths;
  uint               *tmp_tgt_passwords_lengths;
  uint               *tmp_tgt_sockets_lengths;
  uint               *tmp_tgt_wrappers_lengths;
  uint               *tmp_tgt_ssl_cas_lengths;
  uint               *tmp_tgt_ssl_capaths_lengths;
  uint               *tmp_tgt_ssl_certs_lengths;
  uint               *tmp_tgt_ssl_ciphers_lengths;
  uint               *tmp_tgt_ssl_keys_lengths;
  uint               *tmp_tgt_default_files_lengths;
  uint               *tmp_tgt_default_groups_lengths;
  uint               *tmp_tgt_dsns_lengths;
  uint               *tmp_tgt_filedsns_lengths;
  uint               *tmp_tgt_drivers_lengths;
  uint               *tmp_static_link_ids_lengths;

  uint               tmp_server_names_charlen;
  uint               tmp_tgt_table_names_charlen;
  uint               tmp_tgt_dbs_charlen;
  uint               tmp_tgt_hosts_charlen;
  uint               tmp_tgt_usernames_charlen;
  uint               tmp_tgt_passwords_charlen;
  uint               tmp_tgt_sockets_charlen;
  uint               tmp_tgt_wrappers_charlen;
  uint               tmp_tgt_ssl_cas_charlen;
  uint               tmp_tgt_ssl_capaths_charlen;
  uint               tmp_tgt_ssl_certs_charlen;
  uint               tmp_tgt_ssl_ciphers_charlen;
  uint               tmp_tgt_ssl_keys_charlen;
  uint               tmp_tgt_default_files_charlen;
  uint               tmp_tgt_default_groups_charlen;
  uint               tmp_tgt_dsns_charlen;
  uint               tmp_tgt_filedsns_charlen;
  uint               tmp_tgt_drivers_charlen;
  uint               tmp_static_link_ids_charlen;

  uint               tmp_server_names_length;
  uint               tmp_tgt_table_names_length;
  uint               tmp_tgt_dbs_length;
  uint               tmp_tgt_hosts_length;
  uint               tmp_tgt_usernames_length;
  uint               tmp_tgt_passwords_length;
  uint               tmp_tgt_sockets_length;
  uint               tmp_tgt_wrappers_length;
  uint               tmp_tgt_ssl_cas_length;
  uint               tmp_tgt_ssl_capaths_length;
  uint               tmp_tgt_ssl_certs_length;
  uint               tmp_tgt_ssl_ciphers_length;
  uint               tmp_tgt_ssl_keys_length;
  uint               tmp_tgt_default_files_length;
  uint               tmp_tgt_default_groups_length;
  uint               tmp_tgt_dsns_length;
  uint               tmp_tgt_filedsns_length;
  uint               tmp_tgt_drivers_length;
  uint               tmp_static_link_ids_length;
  uint               tmp_tgt_ports_length;
  uint               tmp_tgt_ssl_vscs_length;
  uint               tmp_monitoring_binlog_pos_at_failing_length;
  uint               tmp_link_statuses_length;
} SPIDER_ALTER_TABLE;

typedef struct st_spider_conn_loop_check SPIDER_CONN_LOOP_CHECK;

/* database connection */
typedef struct st_spider_conn
{
  uint               conn_kind;
  char               *conn_key;
  uint               conn_key_length;
  my_hash_value_type conn_key_hash_value;
  int                link_idx;
  spider_db_conn     *db_conn;
  uint               opened_handlers;
  ulonglong          conn_id;
  ulonglong          connection_id;
  query_id_t         casual_read_query_id;
  uint               casual_read_current_id;
  st_spider_conn     *casual_read_base_conn;
  pthread_mutex_t    mta_conn_mutex;
  volatile bool      mta_conn_mutex_lock_already;
  volatile bool      mta_conn_mutex_unlock_later;
  SPIDER_FILE_POS    mta_conn_mutex_file_pos;
  uint               join_trx;
  int                trx_isolation;
  bool               semi_trx_isolation_chk;
  int                semi_trx_isolation;
  bool               semi_trx_chk;
  bool               semi_trx;
  bool               trx_start;
  bool               table_locked;
  int                table_lock;
  bool               disable_xa;
  bool               disable_reconnect;
  int                autocommit;
  int                sql_log_off;
  int                wait_timeout;
  sql_mode_t         sql_mode;
  THD                *thd;
  void               *another_ha_first;
  void               *another_ha_last;
  /* Exactly one of p_small and p_big is not null */
  /* The parent node in the binary tree ordered by priority with a
  smaller or equal priority */
  st_spider_conn     *p_small;
  /* The parent node in the binary tree ordered by priority with a
  bigger priority */
  st_spider_conn     *p_big;
  /* The child node in the binary tree ordered by priority with a
  smaller priority */
  st_spider_conn     *c_small;
  /* The child node in the binary tree ordered by priority with a
  bigger or equal priority */
  st_spider_conn     *c_big;
  longlong           priority;
  bool               server_lost;
  bool               ignore_dup_key;
  char               *error_str;
  int                error_length;
  time_t             ping_time;
  CHARSET_INFO       *access_charset;
  Time_zone          *time_zone;
  uint               connect_timeout;
  uint               net_read_timeout;
  uint               net_write_timeout;
  int                error_mode;
  spider_string      default_database;

  char               *tgt_host;
  char               *tgt_username;
  char               *tgt_password;
  char               *tgt_socket;
  char               *tgt_wrapper;
  char               *tgt_db; /* for not joinable tables on different db */
  char               *tgt_ssl_ca;
  char               *tgt_ssl_capath;
  char               *tgt_ssl_cert;
  char               *tgt_ssl_cipher;
  char               *tgt_ssl_key;
  char               *tgt_default_file;
  char               *tgt_default_group;
  char               *tgt_dsn;
  char               *tgt_filedsn;
  char               *tgt_driver;
  long               tgt_port;
  long               tgt_ssl_vsc;

  uint               tgt_host_length;
  uint               tgt_username_length;
  uint               tgt_password_length;
  uint               tgt_socket_length;
  uint               tgt_wrapper_length;
  uint               tgt_db_length;
  uint               tgt_ssl_ca_length;
  uint               tgt_ssl_capath_length;
  uint               tgt_ssl_cert_length;
  uint               tgt_ssl_cipher_length;
  uint               tgt_ssl_key_length;
  uint               tgt_default_file_length;
  uint               tgt_default_group_length;
  uint               tgt_dsn_length;
  uint               tgt_filedsn_length;
  uint               tgt_driver_length;
  uint               dbton_id;

  volatile
    void             *quick_target;
  volatile bool      bg_init;
  volatile bool      bg_break;
  volatile bool      bg_kill;
  volatile bool      bg_caller_wait;
  volatile bool      bg_caller_sync_wait;
  volatile bool      bg_search;
  volatile bool      bg_discard_result;
  volatile bool      bg_direct_sql;
  volatile bool      bg_exec_sql;
  volatile bool      bg_get_job_stack;
  volatile bool      bg_get_job_stack_off;
  volatile uint      bg_simple_action;
  THD                *bg_thd;
  pthread_t          bg_thread;
  pthread_cond_t     bg_conn_cond;
  pthread_mutex_t    bg_conn_mutex;
  pthread_cond_t     bg_conn_sync_cond;
  pthread_mutex_t    bg_conn_sync_mutex;
  pthread_mutex_t    bg_conn_chain_mutex;
  pthread_mutex_t    *bg_conn_chain_mutex_ptr;
  volatile void      *bg_target;
  volatile int       *bg_error_num;
  volatile ulong     bg_sql_type;
  pthread_mutex_t    bg_job_stack_mutex;
  DYNAMIC_ARRAY      bg_job_stack;
  uint               bg_job_stack_id;
  const char         *bg_job_stack_func_name;
  const char         *bg_job_stack_file_name;
  ulong              bg_job_stack_line_no;
  uint               bg_job_stack_cur_pos;
  volatile
    int              *need_mon;
  int                *conn_need_mon;

  bool               use_for_active_standby;
  bool               in_before_query;

  bool               queued_connect;
  bool               queued_ping;
  bool               queued_trx_isolation;
  bool               queued_semi_trx_isolation;
  bool               queued_wait_timeout;
  bool               queued_autocommit;
  bool               queued_sql_log_off;
  bool               queued_sql_mode;
  bool               queued_time_zone;
  bool               queued_trx_start;
  bool               queued_xa_start;
  bool               queued_net_timeout;
  SPIDER_SHARE       *queued_connect_share;
  int                queued_connect_link_idx;
  ha_spider          *queued_ping_spider;
  int                queued_ping_link_idx;
  int                queued_trx_isolation_val;
  int                queued_semi_trx_isolation_val;
  int                queued_wait_timeout_val;
  bool               queued_autocommit_val;
  bool               queued_sql_log_off_val;
  sql_mode_t         queued_sql_mode_val;
  Time_zone          *queued_time_zone_val;
  XID                *queued_xa_start_xid;


  bool               disable_connect_retry;  /* TRUE if it is unnecessary to
                                                retry to connect after a
                                                connection error */
  bool               connect_error_with_message;
  char               connect_error_msg[MYSQL_ERRMSG_SIZE];
  int                connect_error;
  THD                *connect_error_thd;
  query_id_t         connect_error_query_id;
  time_t             connect_error_time;

  SPIDER_CONN_HOLDER    *conn_holder_for_direct_join;
  SPIDER_LINK_IDX_CHAIN *link_idx_chain;
  SPIDER_IP_PORT_CONN *ip_port_conn;

  pthread_mutex_t    loop_check_mutex;
  HASH               loop_checked;
  uint               loop_checked_id;
  const char         *loop_checked_func_name;
  const char         *loop_checked_file_name;
  ulong              loop_checked_line_no;
  HASH               loop_check_queue;
  uint               loop_check_queue_id;
  const char         *loop_check_queue_func_name;
  const char         *loop_check_queue_file_name;
  ulong              loop_check_queue_line_no;
  SPIDER_CONN_LOOP_CHECK *loop_check_ignored_first;
  SPIDER_CONN_LOOP_CHECK *loop_check_ignored_last;
  SPIDER_CONN_LOOP_CHECK *loop_check_meraged_first;
  SPIDER_CONN_LOOP_CHECK *loop_check_meraged_last;
} SPIDER_CONN;

typedef struct st_spider_lgtm_tblhnd_share
{
  char               *table_name;
  uint               table_name_length;
  my_hash_value_type table_path_hash_value;
  pthread_mutex_t    auto_increment_mutex;
  volatile bool      auto_increment_init;
  volatile ulonglong auto_increment_lclval;
  ulonglong          auto_increment_value;
} SPIDER_LGTM_TBLHND_SHARE;

typedef struct st_spider_patition_handler
{
  bool               clone_bitmap_init;
  query_id_t         parallel_search_query_id;
  uint               no_parts;
  TABLE              *table;
  ha_spider          *owner;
  ha_spider          **handlers;
} SPIDER_PARTITION_HANDLER;

typedef struct st_spider_wide_share
{
  char               *table_name;
  uint               table_name_length;
  my_hash_value_type table_path_hash_value;
  uint               use_count;
  THR_LOCK           lock;
  pthread_mutex_t    sts_mutex;
  pthread_mutex_t    crd_mutex;

  volatile bool      sts_init;
  volatile bool      crd_init;
  volatile time_t    sts_get_time;
  volatile time_t    crd_get_time;
  ha_statistics      stat;

  longlong           *cardinality;
} SPIDER_WIDE_SHARE;

enum spider_hnd_stage {
  SPD_HND_STAGE_NONE,
  SPD_HND_STAGE_STORE_LOCK,
  SPD_HND_STAGE_EXTERNAL_LOCK,
  SPD_HND_STAGE_START_STMT,
  SPD_HND_STAGE_EXTRA,
  SPD_HND_STAGE_COND_PUSH,
  SPD_HND_STAGE_COND_POP,
  SPD_HND_STAGE_INFO_PUSH,
  SPD_HND_STAGE_SET_TOP_TABLE_AND_FIELDS,
  SPD_HND_STAGE_CLEAR_TOP_TABLE_FIELDS
};

typedef struct st_spider_wide_handler
{
  spider_hnd_stage   stage;
  handler            *stage_executor;
  THR_LOCK_DATA      lock;
  SPIDER_TRX         *trx;
  uchar              *searched_bitmap;
  uchar              *ft_discard_bitmap;
  uchar              *position_bitmap;
  uchar              *idx_read_bitmap;
  uchar              *idx_write_bitmap;
  uchar              *rnd_read_bitmap;
  uchar              *rnd_write_bitmap;
  SPIDER_CONDITION   *condition;
  void               *owner;
  SPIDER_PARTITION_HANDLER *partition_handler;
  List<Item>         *direct_update_fields;
  List<Item>         *direct_update_values;
  TABLE_SHARE        *top_share;
  enum thr_lock_type lock_type;
  uchar              lock_table_type;
  int                lock_mode;
  int                external_lock_type;
  int                cond_check_error;
  uint               sql_command;
  uint               top_table_fields;
#ifdef INFO_KIND_FORCE_LIMIT_BEGIN
  longlong           info_limit;
#endif
  bool               between_flg;
  bool               idx_bitmap_is_set;
  bool               rnd_bitmap_is_set;
  bool               position_bitmap_init;
  bool               semi_trx_isolation_chk;
  bool               semi_trx_chk;
  bool               low_priority;
  bool               high_priority;
  bool               consistent_snapshot;
  bool               quick_mode;
  bool               keyread;
  bool               update_request;
  bool               ignore_dup_key;
  bool               write_can_replace;
  bool               insert_with_update;
  bool               cond_check;
  bool               semi_table_lock;
} SPIDER_WIDE_HANDLER;

typedef struct st_spider_transaction
{
  bool               trx_start;
  bool               trx_xa;
  bool               trx_consistent_snapshot;
  bool               trx_xa_prepared;

  bool               use_consistent_snapshot;
  bool               internal_xa;
  uint               internal_xa_snapshot;

  query_id_t         query_id;
  bool               tmp_flg;
  bool               registed_allocated_thds;

  bool               updated_in_this_trx;

  THD                *thd;
  XID                xid;
  HASH               trx_conn_hash;
  uint               trx_conn_hash_id;
  const char         *trx_conn_hash_func_name;
  const char         *trx_conn_hash_file_name;
  ulong              trx_conn_hash_line_no;
  HASH               trx_another_conn_hash;
  uint               trx_another_conn_hash_id;
  const char         *trx_another_conn_hash_func_name;
  const char         *trx_another_conn_hash_file_name;
  ulong              trx_another_conn_hash_line_no;
  HASH               trx_alter_table_hash;
  uint               trx_alter_table_hash_id;
  const char         *trx_alter_table_hash_func_name;
  const char         *trx_alter_table_hash_file_name;
  ulong              trx_alter_table_hash_line_no;
  HASH               trx_ha_hash;
  uint               trx_ha_hash_id;
  const char         *trx_ha_hash_func_name;
  const char         *trx_ha_hash_file_name;
  ulong              trx_ha_hash_line_no;
  uint               trx_ha_reuse_count;
  XID_STATE          internal_xid_state;
  SPIDER_CONN        *join_trx_top;
  ulonglong          spider_thread_id;
  ulonglong          trx_conn_adjustment;
  uint               locked_connections;

  ulonglong          direct_update_count;
  ulonglong          direct_delete_count;
  ulonglong          direct_order_limit_count;
  ulonglong          direct_aggregate_count;
  ulonglong          parallel_search_count;


  pthread_mutex_t    *udf_table_mutexes;
  CHARSET_INFO       *udf_access_charset;
  spider_string      *udf_set_names;

  time_t             mem_calc_merge_time;
  const char         *alloc_func_name[SPIDER_MEM_CALC_LIST_NUM];
  const char         *alloc_file_name[SPIDER_MEM_CALC_LIST_NUM];
  ulong              alloc_line_no[SPIDER_MEM_CALC_LIST_NUM];
  ulonglong          total_alloc_mem[SPIDER_MEM_CALC_LIST_NUM];
  longlong           current_alloc_mem[SPIDER_MEM_CALC_LIST_NUM];
  ulonglong          alloc_mem_count[SPIDER_MEM_CALC_LIST_NUM];
  ulonglong          free_mem_count[SPIDER_MEM_CALC_LIST_NUM];
  ulonglong          total_alloc_mem_buffer[SPIDER_MEM_CALC_LIST_NUM];
  longlong           current_alloc_mem_buffer[SPIDER_MEM_CALC_LIST_NUM];
  ulonglong          alloc_mem_count_buffer[SPIDER_MEM_CALC_LIST_NUM];
  ulonglong          free_mem_count_buffer[SPIDER_MEM_CALC_LIST_NUM];

  MEM_ROOT           mem_root;

  /* for transaction level query */
  SPIDER_SHARE       *tmp_share;
  char               *tmp_connect_info[SPIDER_TMP_SHARE_CHAR_PTR_COUNT];
  uint               tmp_connect_info_length[SPIDER_TMP_SHARE_UINT_COUNT];
  long               tmp_long[SPIDER_TMP_SHARE_LONG_COUNT];
  longlong           tmp_longlong[SPIDER_TMP_SHARE_LONGLONG_COUNT];
  ha_spider          *tmp_spider;
  int                tmp_need_mon;
  spider_db_handler  *tmp_dbton_handler[SPIDER_DBTON_SIZE];
} SPIDER_TRX;

typedef struct st_spider_share
{
  char               *table_name;
  uint               table_name_length;
  uint               use_count;
  uint               link_count;
  uint               all_link_count;
  uint               link_bitmap_size;
  pthread_mutex_t    mutex;
  pthread_mutex_t    sts_mutex;
  pthread_mutex_t    crd_mutex;
/*
  pthread_mutex_t    auto_increment_mutex;
*/
  TABLE_SHARE        *table_share;
  SPIDER_LGTM_TBLHND_SHARE *lgtm_tblhnd_share;
  my_hash_value_type table_name_hash_value;
  my_hash_value_type table_path_hash_value;

  volatile bool      init;
  volatile bool      init_error;
  volatile time_t    init_error_time;
  volatile bool      link_status_init;
  uchar              *table_mon_mutex_bitmap;
  volatile bool      sts_init;
  volatile time_t    sts_get_time;
  volatile time_t    bg_sts_try_time;
  volatile double    bg_sts_interval;
  volatile int       bg_sts_mode;
  volatile int       bg_sts_sync;
  volatile bool      bg_sts_init;
  volatile bool      bg_sts_kill;
  volatile bool      bg_sts_thd_wait;
  THD                *bg_sts_thd;
  pthread_t          bg_sts_thread;
  pthread_cond_t     bg_sts_cond;
  pthread_cond_t     bg_sts_sync_cond;
  volatile bool      crd_init;
  volatile time_t    crd_get_time;
  volatile time_t    bg_crd_try_time;
  volatile double    bg_crd_interval;
  volatile int       bg_crd_mode;
  volatile int       bg_crd_sync;
  volatile bool      bg_crd_init;
  volatile bool      bg_crd_kill;
  volatile bool      bg_crd_thd_wait;
  THD                *bg_crd_thd;
  pthread_t          bg_crd_thread;
  pthread_cond_t     bg_crd_cond;
  pthread_cond_t     bg_crd_sync_cond;
  volatile bool      bg_mon_init;
  volatile bool      bg_mon_kill;
  THD                **bg_mon_thds;
  pthread_t          *bg_mon_threads;
  pthread_mutex_t    *bg_mon_mutexes;
  pthread_cond_t     *bg_mon_conds;
  pthread_cond_t     *bg_mon_sleep_conds;
  /* static bg thread for sts and crd */
  TABLE                 table;
  ha_spider             *sts_spider;
  ha_spider             *crd_spider;
  SPIDER_THREAD         *sts_thread;
  SPIDER_THREAD         *crd_thread;
  volatile bool         sts_spider_init;
  volatile bool         sts_working;
  volatile bool         sts_wait;
  volatile bool         crd_spider_init;
  volatile bool         crd_working;
  volatile bool         crd_wait;
  volatile SPIDER_SHARE *sts_prev;
  volatile SPIDER_SHARE *sts_next;
  volatile SPIDER_SHARE *crd_prev;
  volatile SPIDER_SHARE *crd_next;

  MEM_ROOT           mem_root;

/*
  volatile bool      auto_increment_init;
  volatile ulonglong auto_increment_lclval;
*/
  ha_statistics      stat;

  longlong           static_records_for_status;
  longlong           static_mean_rec_length;

  int                bitmap_size;
  spider_string      *key_hint;
  CHARSET_INFO       *access_charset;
  longlong           *static_key_cardinality;
  longlong           *cardinality;
  uchar              *cardinality_upd;
  longlong           additional_table_flags;
  bool               have_recovery_link;

  int                sts_bg_mode;
  double             sts_interval;
  int                sts_mode;
  int                sts_sync;
  int                store_last_sts;
  int                load_sts_at_startup;
  int                crd_bg_mode;
  double             crd_interval;
  int                crd_mode;
  int                crd_sync;
  int                store_last_crd;
  int                load_crd_at_startup;
  int                crd_type;
  double             crd_weight;
  longlong           internal_offset;
  longlong           internal_limit;
  longlong           split_read;
  double             semi_split_read;
  longlong           semi_split_read_limit;
  int                init_sql_alloc_size;
  int                reset_sql_alloc;
  int                multi_split_read;
  int                max_order;
  int                semi_table_lock;
  int                semi_table_lock_conn;
  int                selupd_lock_mode;
  int                query_cache;
  int                query_cache_sync;
  int                bulk_size;
  int                bulk_update_mode;
  int                bulk_update_size;
  int                buffer_size;
  int                internal_optimize;
  int                internal_optimize_local;
  double             scan_rate;
  double             read_rate;
  longlong           priority;
  int                quick_mode;
  longlong           quick_page_size;
  longlong           quick_page_byte;
  int                low_mem_read;
  int                table_count_mode;
  int                select_column_mode;
  int                bgs_mode;
  longlong           bgs_first_read;
  longlong           bgs_second_read;
  longlong           first_read;
  longlong           second_read;
  int                auto_increment_mode;
  int                use_table_charset;
  int                use_pushdown_udf;
  int                skip_default_condition;
  int                skip_parallel_search;
  int                direct_dup_insert;
  longlong           direct_order_limit;
  int                read_only_mode;
  int                error_read_mode;
  int                error_write_mode;
  int                active_link_count;
#ifdef HA_CAN_FORCE_BULK_UPDATE
  int                force_bulk_update;
#endif
#ifdef HA_CAN_FORCE_BULK_DELETE
  int                force_bulk_delete;
#endif
  int                casual_read;
  int                delete_all_rows_type;

  int                bka_mode;
  char               *bka_engine;
  int                bka_engine_length;

  my_hash_value_type *conn_keys_hash_value;
  char               **server_names;
  char               **tgt_table_names;
  char               **tgt_dbs;
  char               **tgt_hosts;
  char               **tgt_usernames;
  char               **tgt_passwords;
  char               **tgt_sockets;
  char               **tgt_wrappers;
  char               **tgt_ssl_cas;
  char               **tgt_ssl_capaths;
  char               **tgt_ssl_certs;
  char               **tgt_ssl_ciphers;
  char               **tgt_ssl_keys;
  char               **tgt_default_files;
  char               **tgt_default_groups;
  char               **tgt_dsns;
  char               **tgt_filedsns;
  char               **tgt_drivers;
  char               **static_link_ids;
  char               **tgt_pk_names;
  char               **tgt_sequence_names;
  char               **conn_keys;
  long               *tgt_ports;
  long               *tgt_ssl_vscs;
  long               *link_statuses;
  long               *monitoring_bg_flag;
  long               *monitoring_bg_kind;
  long               *monitoring_binlog_pos_at_failing;
  long               *monitoring_flag;
  long               *monitoring_kind;
  longlong           *monitoring_bg_interval;
  longlong           *monitoring_limit;
  longlong           *monitoring_sid;
  long               *connect_timeouts;
  long               *net_read_timeouts;
  long               *net_write_timeouts;
  long               *access_balances;
  long               *bka_table_name_types;
  long               *strict_group_bys;

  uint               *server_names_lengths;
  uint               *tgt_table_names_lengths;
  uint               *tgt_dbs_lengths;
  uint               *tgt_hosts_lengths;
  uint               *tgt_usernames_lengths;
  uint               *tgt_passwords_lengths;
  uint               *tgt_sockets_lengths;
  uint               *tgt_wrappers_lengths;
  uint               *tgt_ssl_cas_lengths;
  uint               *tgt_ssl_capaths_lengths;
  uint               *tgt_ssl_certs_lengths;
  uint               *tgt_ssl_ciphers_lengths;
  uint               *tgt_ssl_keys_lengths;
  uint               *tgt_default_files_lengths;
  uint               *tgt_default_groups_lengths;
  uint               *tgt_dsns_lengths;
  uint               *tgt_filedsns_lengths;
  uint               *tgt_drivers_lengths;
  uint               *static_link_ids_lengths;
  uint               *tgt_pk_names_lengths;
  uint               *tgt_sequence_names_lengths;
  uint               *conn_keys_lengths;
  uint               *sql_dbton_ids;

  uint               server_names_charlen;
  uint               tgt_table_names_charlen;
  uint               tgt_dbs_charlen;
  uint               tgt_hosts_charlen;
  uint               tgt_usernames_charlen;
  uint               tgt_passwords_charlen;
  uint               tgt_sockets_charlen;
  uint               tgt_wrappers_charlen;
  uint               tgt_ssl_cas_charlen;
  uint               tgt_ssl_capaths_charlen;
  uint               tgt_ssl_certs_charlen;
  uint               tgt_ssl_ciphers_charlen;
  uint               tgt_ssl_keys_charlen;
  uint               tgt_default_files_charlen;
  uint               tgt_default_groups_charlen;
  uint               tgt_dsns_charlen;
  uint               tgt_filedsns_charlen;
  uint               tgt_drivers_charlen;
  uint               static_link_ids_charlen;
  uint               tgt_pk_names_charlen;
  uint               tgt_sequence_names_charlen;
  uint               conn_keys_charlen;

  uint               server_names_length;
  uint               tgt_table_names_length;
  uint               tgt_dbs_length;
  uint               tgt_hosts_length;
  uint               tgt_usernames_length;
  uint               tgt_passwords_length;
  uint               tgt_sockets_length;
  uint               tgt_wrappers_length;
  uint               tgt_ssl_cas_length;
  uint               tgt_ssl_capaths_length;
  uint               tgt_ssl_certs_length;
  uint               tgt_ssl_ciphers_length;
  uint               tgt_ssl_keys_length;
  uint               tgt_default_files_length;
  uint               tgt_default_groups_length;
  uint               tgt_dsns_length;
  uint               tgt_filedsns_length;
  uint               tgt_drivers_length;
  uint               static_link_ids_length;
  uint               tgt_pk_names_length;
  uint               tgt_sequence_names_length;
  uint               conn_keys_length;
  uint               tgt_ports_length;
  uint               tgt_ssl_vscs_length;
  uint               link_statuses_length;
  uint               monitoring_bg_flag_length;
  uint               monitoring_bg_kind_length;
  uint               monitoring_binlog_pos_at_failing_length;
  uint               monitoring_flag_length;
  uint               monitoring_kind_length;
  uint               monitoring_bg_interval_length;
  uint               monitoring_limit_length;
  uint               monitoring_sid_length;
  uint               connect_timeouts_length;
  uint               net_read_timeouts_length;
  uint               net_write_timeouts_length;
  uint               access_balances_length;
  uint               bka_table_name_types_length;
  uint               strict_group_bys_length;

  /* for dbton */
  uchar              dbton_bitmap[spider_bitmap_size(SPIDER_DBTON_SIZE)];
  spider_db_share    *dbton_share[SPIDER_DBTON_SIZE];
  uint               use_dbton_count;
  uint               use_dbton_ids[SPIDER_DBTON_SIZE];
  uint               dbton_id_to_seq[SPIDER_DBTON_SIZE];
  uint               use_sql_dbton_count;
  uint               use_sql_dbton_ids[SPIDER_DBTON_SIZE];
  uint               sql_dbton_id_to_seq[SPIDER_DBTON_SIZE];

  SPIDER_ALTER_TABLE alter_table;
  SPIDER_WIDE_SHARE  *wide_share;
} SPIDER_SHARE;

typedef struct st_spider_link_pack
{
  SPIDER_SHARE               *share;
  int                        link_idx;
} SPIDER_LINK_PACK;

typedef struct st_spider_init_error_table
{
  char               *table_name;
  uint               table_name_length;
  my_hash_value_type table_name_hash_value;
  bool               init_error_with_message;
  char               init_error_msg[MYSQL_ERRMSG_SIZE];
  volatile int       init_error;
  volatile time_t    init_error_time;
} SPIDER_INIT_ERROR_TABLE;

typedef struct st_spider_direct_sql
{
  int                  table_count;
  char                 **db_names;
  char                 **table_names;
  TABLE                **tables;
  int                  *iop;

  /* for using real table */
  bool                 real_table_used;
  TABLE_LIST           *table_list_first;
  TABLE_LIST           *table_list;
  uchar                *real_table_bitmap;
  SPIDER_Open_tables_backup open_tables_backup;
  THD                  *open_tables_thd;

  char                 *sql;
  ulong                sql_length;

  SPIDER_TRX           *trx;
  SPIDER_CONN          *conn;

  bool                 modified_non_trans_table;

  int                  table_loop_mode;
  longlong             priority;
  int                  connect_timeout;
  int                  net_read_timeout;
  int                  net_write_timeout;
  longlong             bulk_insert_rows;
  int                  connection_channel;
  int                  use_real_table;
  int                  error_rw_mode;

  char                 *server_name;
  char                 *tgt_default_db_name;
  char                 *tgt_host;
  char                 *tgt_username;
  char                 *tgt_password;
  char                 *tgt_socket;
  char                 *tgt_wrapper;
  char                 *tgt_ssl_ca;
  char                 *tgt_ssl_capath;
  char                 *tgt_ssl_cert;
  char                 *tgt_ssl_cipher;
  char                 *tgt_ssl_key;
  char                 *tgt_default_file;
  char                 *tgt_default_group;
  char                 *tgt_dsn;
  char                 *tgt_filedsn;
  char                 *tgt_driver;
  char                 *conn_key;
  long                 tgt_port;
  long                 tgt_ssl_vsc;

  uint                 server_name_length;
  uint                 tgt_default_db_name_length;
  uint                 tgt_host_length;
  uint                 tgt_username_length;
  uint                 tgt_password_length;
  uint                 tgt_socket_length;
  uint                 tgt_wrapper_length;
  uint                 tgt_ssl_ca_length;
  uint                 tgt_ssl_capath_length;
  uint                 tgt_ssl_cert_length;
  uint                 tgt_ssl_cipher_length;
  uint                 tgt_ssl_key_length;
  uint                 tgt_default_file_length;
  uint                 tgt_default_group_length;
  uint                 tgt_dsn_length;
  uint                 tgt_filedsn_length;
  uint                 tgt_driver_length;
  uint                 conn_key_length;
  uint                 dbton_id;
  my_hash_value_type   conn_key_hash_value;

  pthread_mutex_t               *bg_mutex;
  pthread_cond_t                *bg_cond;
  volatile st_spider_direct_sql *prev;
  volatile st_spider_direct_sql *next;
  void                          *parent;
} SPIDER_DIRECT_SQL;

typedef struct st_spider_bg_direct_sql
{
  longlong                   called_cnt;
  char                       bg_error_msg[MYSQL_ERRMSG_SIZE];
  volatile int               bg_error;
  volatile bool              modified_non_trans_table;
  pthread_mutex_t            bg_mutex;
  pthread_cond_t             bg_cond;
  volatile SPIDER_DIRECT_SQL *direct_sql;
} SPIDER_BG_DIRECT_SQL;

typedef struct st_spider_mon_table_result
{
  int                        result_status;
  SPIDER_TRX                 *trx;
} SPIDER_MON_TABLE_RESULT;

typedef struct st_spider_table_mon
{
  SPIDER_SHARE               *share;
  uint32                     server_id;
  st_spider_table_mon_list   *parent;
  st_spider_table_mon        *next;
} SPIDER_TABLE_MON;

typedef struct st_spider_table_mon_list
{
  char                       *key;
  uint                       key_length;
  my_hash_value_type         key_hash_value;

  uint                       use_count;
  uint                       mutex_hash;
  ulonglong                  mon_table_cache_version;

  char                       *table_name;
  int                        link_id;
  uint                       table_name_length;

  int                        list_size;
  SPIDER_TABLE_MON           *first;
  SPIDER_TABLE_MON           *current;
  volatile int               mon_status;

  SPIDER_SHARE               *share;

  pthread_mutex_t            caller_mutex;
  pthread_mutex_t            receptor_mutex;
  pthread_mutex_t            monitor_mutex;
  pthread_mutex_t            update_status_mutex;
  volatile int               last_caller_result;
  volatile int               last_receptor_result;
  volatile int               last_mon_result;
} SPIDER_TABLE_MON_LIST;

typedef struct st_spider_copy_table_conn
{
  SPIDER_SHARE               *share;
  int                        link_idx;
  SPIDER_CONN                *conn;
  spider_db_copy_table       *copy_table;
  ha_spider                  *spider;
  int                        need_mon;
  int                        bg_error_num;
  st_spider_copy_table_conn  *next;
} SPIDER_COPY_TABLE_CONN;

typedef struct st_spider_copy_tables
{
  SPIDER_TRX                 *trx;
  char                       *spider_db_name;
  int                        spider_db_name_length;
  char                       *spider_table_name;
  int                        spider_table_name_length;
  char                       *spider_real_table_name;
  int                        spider_real_table_name_length;
  TABLE_LIST                 spider_table_list;
  CHARSET_INFO               *access_charset;

  SPIDER_COPY_TABLE_CONN     *table_conn[2];
  bool                       use_auto_mode[2];
  int                        link_idx_count[2];
  int                        *link_idxs[2];

  int                        bulk_insert_interval;
  longlong                   bulk_insert_rows;
  int                        use_table_charset;
  int                        use_transaction;
  int                        bg_mode;

  char                       *database;

  int                        database_length;
} SPIDER_COPY_TABLES;

class SPIDER_SORT
{
public:
  ulong sort;
};

typedef struct st_spider_trx_ha
{
  char                       *table_name;
  uint                       table_name_length;
  SPIDER_TRX                 *trx;
  SPIDER_SHARE               *share;
  uint                       link_count;
  uint                       link_bitmap_size;
  uint                       *conn_link_idx;
  uchar                      *conn_can_fo;
  bool                       wait_for_reusing;
} SPIDER_TRX_HA;


#define SPIDER_INT_HLD_TGT_SIZE 100
typedef struct st_spider_int_hld
{
  uint tgt_num;
  int tgt[SPIDER_INT_HLD_TGT_SIZE];
  st_spider_int_hld *next;
} SPIDER_INT_HLD;

typedef struct st_spider_item_hld
{
  uint               tgt_num;
  Item               *item;
  bool               init_mem_root;
  MEM_ROOT           mem_root;
  st_spider_item_hld *next;
} SPIDER_ITEM_HLD;

char *spider_create_string(
  const char *str,
  uint length
);


typedef struct st_spider_ip_port_conn {
  char               *key;
  size_t             key_len;
  my_hash_value_type key_hash_value;
  char               *remote_ip_str;
  long               remote_port;
  ulong              ip_port_count;
  volatile ulong     waiting_count;
  pthread_mutex_t    mutex;
  pthread_cond_t     cond;
  ulonglong          conn_id; /* each conn has it's own conn_id */
} SPIDER_IP_PORT_CONN;