forked from stoneatom/stonedb
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathlib_sql.cc
1467 lines (1231 loc) · 38.4 KB
/
lib_sql.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, 2014
* SWsoft company
*
* Modifications Copyright (c) 2001, 2021, Oracle and/or its affiliates.
* All rights reserved.
*
* This material is provided "as is", with absolutely no warranty expressed
* or implied. Any use is at your own risk.
*
* Permission to use or copy this software for any purpose is hereby granted
* without fee, provided the above notices are retained on all copies.
* Permission to modify the code and to distribute modified code is granted,
* provided the above notices are retained, and a notice that the code was
* modified is included with the above copyright notice.
*
This code was modified by the MySQL team
*/
/*
The following is needed to not cause conflicts when we include mysqld.cc
*/
extern "C"
{
extern unsigned long max_allowed_packet, net_buffer_length;
}
#include "../sql/mysqld.cc"
extern "C" {
#include <mysql.h>
#undef ER
#include "errmsg.h"
#include "embedded_priv.h"
} // extern "C"
#include <algorithm>
using std::min;
using std::max;
extern "C" {
extern unsigned int mysql_server_last_errno;
extern char mysql_server_last_error[MYSQL_ERRMSG_SIZE];
static my_bool emb_read_query_result(MYSQL *mysql);
void unireg_clear(int exit_code)
{
DBUG_ENTER("unireg_clear");
clean_up(!opt_help && (exit_code || !opt_bootstrap)); /* purecov: inspected */
my_end(opt_endinfo ? MY_CHECK_ERROR | MY_GIVE_INFO : 0);
DBUG_VOID_RETURN;
}
/*
Wrapper error handler for embedded server to call client/server error
handler based on whether thread is in client/server context
*/
static void embedded_error_handler(uint error, const char *str, myf MyFlags)
{
DBUG_ENTER("embedded_error_handler");
/*
If current_thd is NULL, it means restore_global has been called and
thread is in client context, then call client error handler else call
server error handler.
*/
DBUG_RETURN(current_thd ? my_message_sql(error, str, MyFlags):
my_message_stderr(error, str, MyFlags));
}
/*
Reads error information from the MYSQL_DATA and puts
it into proper MYSQL members
SYNOPSIS
embedded_get_error()
mysql connection handler
data query result
NOTES
after that function error information will be accessible
with usual functions like mysql_error()
data is my_free-d in this function
most of the data is stored in data->embedded_info structure
*/
void embedded_get_error(MYSQL *mysql, MYSQL_DATA *data)
{
NET *net= &mysql->net;
struct embedded_query_result *ei= data->embedded_info;
net->last_errno= ei->last_errno;
strmake(net->last_error, ei->info, sizeof(net->last_error)-1);
memcpy(net->sqlstate, ei->sqlstate, sizeof(net->sqlstate));
mysql->server_status= ei->server_status;
free_root(&data->alloc, MYF(0));
my_free(data);
}
static my_bool
emb_advanced_command(MYSQL *mysql, enum enum_server_command command,
const uchar *header, size_t header_length,
const uchar *arg, size_t arg_length, my_bool skip_check,
MYSQL_STMT *stmt)
{
my_bool result= 1;
THD *thd=(THD *) mysql->thd;
NET *net= &mysql->net;
my_bool stmt_skip= stmt ? stmt->state != MYSQL_STMT_INIT_DONE : FALSE;
union COM_DATA com_data;
if (!thd)
{
/* Do "reconnect" if possible */
if (mysql_reconnect(mysql) || stmt_skip)
return 1;
thd= (THD *) mysql->thd;
}
#if defined(ENABLED_PROFILING)
thd->profiling.start_new_query();
#endif
thd->clear_data_list();
/* Check that we are calling the client functions in right order */
if (mysql->status != MYSQL_STATUS_READY)
{
set_mysql_error(mysql, CR_COMMANDS_OUT_OF_SYNC, unknown_sqlstate);
result= 1;
goto end;
}
/* Clear result variables */
thd->clear_error();
thd->get_stmt_da()->reset_diagnostics_area();
mysql->affected_rows= ~(my_ulonglong) 0;
mysql->field_count= 0;
net_clear_error(net);
thd->current_stmt= stmt;
thd->thread_stack= (char*) &thd;
thd->store_globals(); // Fix if more than one connect
/*
We have to call free_old_query before we start to fill mysql->fields
for new query. In the case of embedded server we collect field data
during query execution (not during data retrieval as it is in remote
client). So we have to call free_old_query here
*/
free_old_query(mysql);
thd->extra_length= arg_length;
thd->extra_data= (char *)arg;
if (header)
{
arg= header;
arg_length= header_length;
}
thd->get_protocol_classic()->create_command(&com_data, command,
(uchar *) arg, arg_length);
result= dispatch_command(thd, &com_data, command);
thd->cur_data= 0;
if (!skip_check)
result= thd->is_error() ? -1 : 0;
#if defined(ENABLED_PROFILING)
thd->profiling.finish_current_query();
#endif
end:
thd->restore_globals();
return result;
}
static void emb_flush_use_result(MYSQL *mysql, my_bool)
{
THD *thd= (THD*) mysql->thd;
if (thd->cur_data)
{
free_rows(thd->cur_data);
thd->cur_data= 0;
}
else if (thd->first_data)
{
MYSQL_DATA *data= thd->first_data;
thd->first_data= data->embedded_info->next;
free_rows(data);
}
}
/*
reads dataset from the next query result
SYNOPSIS
emb_read_rows()
mysql connection handle
other parameters are not used
NOTES
It just gets next MYSQL_DATA from the result's queue
RETURN
pointer to MYSQL_DATA with the coming recordset
*/
static MYSQL_DATA *
emb_read_rows(MYSQL *mysql, MYSQL_FIELD *mysql_fields MY_ATTRIBUTE((unused)),
unsigned int fields MY_ATTRIBUTE((unused)))
{
MYSQL_DATA *result= ((THD*)mysql->thd)->cur_data;
((THD*)mysql->thd)->cur_data= 0;
if (result->embedded_info->last_errno)
{
embedded_get_error(mysql, result);
return NULL;
}
*result->embedded_info->prev_ptr= NULL;
return result;
}
static MYSQL_FIELD *emb_list_fields(MYSQL *mysql)
{
MYSQL_DATA *res;
if (emb_read_query_result(mysql))
return 0;
res= ((THD*) mysql->thd)->cur_data;
((THD*) mysql->thd)->cur_data= 0;
mysql->field_alloc= res->alloc;
my_free(res);
mysql->status= MYSQL_STATUS_READY;
return mysql->fields;
}
static my_bool emb_read_prepare_result(MYSQL *mysql, MYSQL_STMT *stmt)
{
THD *thd= (THD*) mysql->thd;
MYSQL_DATA *res;
stmt->stmt_id= thd->client_stmt_id;
stmt->param_count= thd->client_param_count;
stmt->field_count= 0;
mysql->warning_count= thd->get_stmt_da()->current_statement_cond_count();
if (thd->first_data)
{
if (emb_read_query_result(mysql))
return 1;
stmt->field_count= mysql->field_count;
mysql->status= MYSQL_STATUS_READY;
res= thd->cur_data;
thd->cur_data= NULL;
if (!(mysql->server_status & SERVER_STATUS_AUTOCOMMIT))
mysql->server_status|= SERVER_STATUS_IN_TRANS;
stmt->fields= mysql->fields;
stmt->mem_root= res->alloc;
mysql->fields= NULL;
my_free(res);
}
return 0;
}
/**************************************************************************
Get column lengths of the current row
If one uses mysql_use_result, res->lengths contains the length information,
else the lengths are calculated from the offset between pointers.
**************************************************************************/
static void emb_fetch_lengths(ulong *to, MYSQL_ROW column,
unsigned int field_count)
{
MYSQL_ROW end;
for (end=column + field_count; column != end ; column++,to++)
*to= *column ? *(uint *)((*column) - sizeof(uint)) : 0;
}
static my_bool emb_read_query_result(MYSQL *mysql)
{
THD *thd= (THD*) mysql->thd;
MYSQL_DATA *res= thd->first_data;
assert(!thd->cur_data);
thd->first_data= res->embedded_info->next;
if (res->embedded_info->last_errno &&
!res->embedded_info->fields_list)
{
embedded_get_error(mysql, res);
return 1;
}
mysql->warning_count= res->embedded_info->warning_count;
mysql->server_status= res->embedded_info->server_status;
mysql->field_count= res->fields;
if (!(mysql->fields= res->embedded_info->fields_list))
{
mysql->affected_rows= res->embedded_info->affected_rows;
mysql->insert_id= res->embedded_info->insert_id;
}
net_clear_error(&mysql->net);
mysql->info= 0;
if (res->embedded_info->info[0])
{
strmake(mysql->info_buffer, res->embedded_info->info, MYSQL_ERRMSG_SIZE-1);
mysql->info= mysql->info_buffer;
}
if (res->embedded_info->fields_list)
{
mysql->status=MYSQL_STATUS_GET_RESULT;
thd->cur_data= res;
}
else
my_free(res);
return 0;
}
#define HEADER_SIZE 9
static int emb_stmt_execute(MYSQL_STMT *stmt)
{
DBUG_ENTER("emb_stmt_execute");
/*
Header size is made similar to non-embedded library.
It should be consistent across embedded and non-embedded
libraries.
*/
uchar header[HEADER_SIZE];
THD *thd;
my_bool res;
int4store(header, stmt->stmt_id);
header[4]= (uchar) stmt->flags;
/*
Dummy value is stored in the last 4 bytes of the header
to make it consistent with non-embedded library.
*/
int4store(header + 5, 1);
thd= (THD*)stmt->mysql->thd;
thd->client_param_count= stmt->param_count;
thd->client_params= stmt->params;
res= MY_TEST(emb_advanced_command(stmt->mysql, COM_STMT_EXECUTE, 0, 0,
header, sizeof(header), 1, stmt) ||
emb_read_query_result(stmt->mysql));
stmt->affected_rows= stmt->mysql->affected_rows;
stmt->insert_id= stmt->mysql->insert_id;
stmt->server_status= stmt->mysql->server_status;
if (res)
{
NET *net= &stmt->mysql->net;
set_stmt_errmsg(stmt, net);
DBUG_RETURN(1);
}
else if (stmt->mysql->status == MYSQL_STATUS_GET_RESULT)
stmt->mysql->status= MYSQL_STATUS_STATEMENT_GET_RESULT;
DBUG_RETURN(0);
}
int emb_read_binary_rows(MYSQL_STMT *stmt)
{
MYSQL_DATA *data;
if (!(data= emb_read_rows(stmt->mysql, 0, 0)))
{
set_stmt_errmsg(stmt, &stmt->mysql->net);
return 1;
}
stmt->result= *data;
my_free(data);
set_stmt_errmsg(stmt, &stmt->mysql->net);
return 0;
}
int emb_read_rows_from_cursor(MYSQL_STMT *stmt)
{
MYSQL *mysql= stmt->mysql;
THD *thd= (THD*) mysql->thd;
MYSQL_DATA *res= thd->first_data;
assert(!thd->first_data->embedded_info->next);
thd->first_data= 0;
if (res->embedded_info->last_errno)
{
embedded_get_error(mysql, res);
set_stmt_errmsg(stmt, &mysql->net);
return 1;
}
thd->cur_data= res;
mysql->warning_count= res->embedded_info->warning_count;
mysql->server_status= res->embedded_info->server_status;
net_clear_error(&mysql->net);
return emb_read_binary_rows(stmt);
}
int emb_unbuffered_fetch(MYSQL *mysql, char **row)
{
THD *thd= (THD*) mysql->thd;
MYSQL_DATA *data= thd->cur_data;
if (data && data->embedded_info->last_errno)
{
embedded_get_error(mysql, data);
thd->cur_data= 0;
return 1;
}
if (!data || !data->data)
{
*row= NULL;
if (data)
{
thd->cur_data= thd->first_data;
thd->first_data= data->embedded_info->next;
free_rows(data);
}
}
else
{
*row= (char *)data->data->data;
data->data= data->data->next;
}
return 0;
}
static void emb_free_embedded_thd(MYSQL *mysql)
{
THD *thd= (THD*)mysql->thd;
thd->clear_data_list();
thd->store_globals();
thd->release_resources();
Global_THD_manager::get_instance()->remove_thd(thd);
delete thd;
mysql->thd=0;
}
static const char * emb_read_statistics(MYSQL *mysql)
{
THD *thd= (THD*)mysql->thd;
return thd->is_error() ? thd->get_stmt_da()->message_text() : "";
}
static MYSQL_RES * emb_store_result(MYSQL *mysql)
{
return mysql_store_result(mysql);
}
int emb_read_change_user_result(MYSQL *mysql)
{
mysql->net.read_pos= (uchar*)""; // fake an OK packet
return mysql_errno(mysql) ? static_cast<int>packet_error :
1 /* length of the OK packet */;
}
MYSQL_METHODS embedded_methods=
{
emb_read_query_result,
emb_advanced_command,
emb_read_rows,
emb_store_result,
emb_fetch_lengths,
emb_flush_use_result,
emb_read_change_user_result,
emb_list_fields,
emb_read_prepare_result,
emb_stmt_execute,
emb_read_binary_rows,
emb_unbuffered_fetch,
emb_free_embedded_thd,
emb_read_statistics,
emb_read_query_result,
emb_read_rows_from_cursor,
free_rows
};
/*
Make a copy of array and the strings array points to
*/
char **copy_arguments(int argc, char **argv)
{
size_t length= 0;
char **from, **res, **end= argv+argc;
for (from=argv ; from != end ; from++)
length+= strlen(*from);
if ((res= (char**) my_malloc(PSI_NOT_INSTRUMENTED,
sizeof(argv)*(argc+1)+length+argc,
MYF(MY_WME))))
{
char **to= res, *to_str= (char*) (res+argc+1);
for (from=argv ; from != end ;)
{
*to++= to_str;
to_str= my_stpcpy(to_str, *from++)+1;
}
*to= 0; // Last ptr should be null
}
return res;
}
char ** copy_arguments_ptr= 0;
int init_embedded_server(int argc, char **argv, char **groups)
{
/*
This mess is to allow people to call the init function without
having to mess with a fake argv
*/
int *argcp= NULL;
char ***argvp= NULL;
int fake_argc= 1;
char *fake_argv[2];
char **foo= &fake_argv[0];
char fake_server[]= "server";
char fake_embedded[]= "embedded";
char *fake_groups[]= { fake_server, fake_embedded, NULL };
char fake_name[]= "fake_name";
my_bool acl_error;
if (my_thread_init())
return 1;
if (argc)
{
argcp= &argc;
argvp= &argv;
}
else
{
fake_argv[0]= fake_name;
fake_argv[1]= NULL;
argcp= &fake_argc;
argvp= &foo;
}
if (!groups)
groups= fake_groups;
my_progname= "mysql_embedded";
/*
Perform basic query log initialization. Should be called after
MY_INIT, as it initializes mutexes.
*/
query_logger.init();
orig_argc= *argcp;
orig_argv= *argvp;
#if defined(TIANMU)
if (load_defaults(MYSQL_CONFIG_NAME, (const char **)groups, argcp, argvp))
#else
if (load_defaults("my", (const char **)groups, argcp, argvp))
#endif
return 1;
defaults_argc= *argcp;
defaults_argv= *argvp;
remaining_argc= *argcp;
remaining_argv= *argvp;
/* Must be initialized early for comparison of options name */
system_charset_info= &my_charset_utf8_general_ci;
sys_var_init();
if (handle_early_options() != 0)
{
return 1;
}
ulong requested_open_files_dummy;
adjust_related_options(&requested_open_files_dummy);
if (init_common_variables())
{
mysql_server_end();
return 1;
}
mysql_data_home= mysql_real_data_home;
mysql_data_home_len= mysql_real_data_home_len;
/* Get default temporary directory */
opt_mysql_tmpdir=getenv("TMPDIR"); /* Use this if possible */
#if defined(_WIN32)
if (!opt_mysql_tmpdir)
opt_mysql_tmpdir=getenv("TEMP");
if (!opt_mysql_tmpdir)
opt_mysql_tmpdir=getenv("TMP");
#endif
if (!opt_mysql_tmpdir || !opt_mysql_tmpdir[0])
opt_mysql_tmpdir= const_cast<char*>(DEFAULT_TMPDIR); /* purecov: inspected*/
init_ssl();
umask(((~my_umask) & 0666));
if (init_server_components())
{
mysql_server_end();
return 1;
}
/*
Each server should have one UUID. We will create it automatically, if it
does not exist.
*/
if (!opt_bootstrap && init_server_auto_options())
{
mysql_server_end();
return 1;
}
/*
set error_handler_hook to embedded_error_handler wrapper.
*/
error_handler_hook= embedded_error_handler;
acl_error= 0;
#ifndef NO_EMBEDDED_ACCESS_CHECKS
acl_error= acl_init(opt_noacl) || grant_init(opt_noacl);
#endif
if (acl_error || my_tz_init((THD *)0, default_tz_name, opt_bootstrap))
{
mysql_server_end();
return 1;
}
init_max_user_conn();
init_update_queries();
if (!opt_bootstrap)
servers_init(0);
start_handle_manager();
// FIXME initialize binlog_filter and rpl_filter if not already done
// corresponding delete is in clean_up()
if(!binlog_filter) binlog_filter = new Rpl_filter;
if(!rpl_filter) rpl_filter = new Rpl_filter;
if (opt_init_file)
{
if (read_init_file(opt_init_file))
{
mysql_server_end();
return 1;
}
}
execute_ddl_log_recovery();
start_processing_signals();
#ifdef WITH_NDBCLUSTER_STORAGE_ENGINE
/* engine specific hook, to be made generic */
if (ndb_wait_setup_func && ndb_wait_setup_func(opt_ndb_wait_setup))
{
sql_print_warning("NDB : Tables not available after %lu seconds."
" Consider increasing --ndb-wait-setup value",
opt_ndb_wait_setup);
}
#endif
return 0;
}
void end_embedded_server()
{
my_free(copy_arguments_ptr);
copy_arguments_ptr=0;
clean_up(0);
}
void init_embedded_mysql(MYSQL *mysql, int client_flag)
{
THD *thd = (THD *)mysql->thd;
thd->mysql= mysql;
mysql->server_version= server_version;
mysql->client_flag= client_flag;
init_alloc_root(PSI_NOT_INSTRUMENTED, &mysql->field_alloc, 8192, 0);
}
/**
@brief Initialize a new THD for a connection in the embedded server
@param client_flag Client capabilities which this thread supports
@return pointer to the created THD object
@todo
This function copies code from several places in the server, including
create_new_thread(), and prepare_new_connection_state(). This should
be refactored to avoid code duplication.
*/
void *create_embedded_thd(int client_flag)
{
THD * thd= new THD;
thd->set_new_thread_id();
thd->thread_stack= (char*) &thd;
if (thd->store_globals())
{
my_message_local(ERROR_LEVEL, "store_globals failed.");
goto err;
}
lex_start(thd);
/* TODO - add init_connect command execution */
if (thd->variables.max_join_size == HA_POS_ERROR)
thd->variables.option_bits |= OPTION_BIG_SELECTS;
thd->proc_info=0; // Remove 'login'
thd->set_command(COM_SLEEP);
thd->set_time();
thd->init_for_queries();
thd->get_protocol_classic()->set_client_capabilities(client_flag);
thd->real_id= my_thread_self();
thd->reset_db(NULL_CSTR);
#ifndef NO_EMBEDDED_ACCESS_CHECKS
thd->security_context()->set_db_access(DB_ACLS);
thd->security_context()->set_master_access(~NO_ACCESS);
#endif
thd->cur_data= 0;
thd->first_data= 0;
thd->data_tail= &thd->first_data;
thd->get_protocol_classic()->wipe_net();
Global_THD_manager::get_instance()->add_thd(thd);
return thd;
err:
delete(thd);
return NULL;
}
static void
emb_transfer_connect_attrs(MYSQL *mysql)
{
#ifdef HAVE_PSI_THREAD_INTERFACE
if (mysql->options.extension &&
mysql->options.extension->connection_attributes_length)
{
uchar *buf, *ptr;
THD *thd= (THD*)mysql->thd;
size_t length= mysql->options.extension->connection_attributes_length;
/* 9 = max length of the serialized length */
ptr= buf= (uchar *) my_alloca(length + 9);
send_client_connect_attrs(mysql, buf);
net_field_length_ll(&ptr);
PSI_THREAD_CALL(set_thread_connect_attrs)((char *) ptr, length, thd->charset());
}
#endif
}
#ifdef NO_EMBEDDED_ACCESS_CHECKS
int check_embedded_connection(MYSQL *mysql, const char *db)
{
int result;
LEX_CSTRING db_lex_cstr= to_lex_cstring(db);
THD *thd= (THD*)mysql->thd;
/* the server does the same as the client */
mysql->server_capabilities= mysql->client_flag;
thd_init_client_charset(thd, mysql->charset->number);
thd->update_charset();
Security_context *sctx= thd->security_context();
sctx->set_host_ptr(my_localhost, strlen(my_localhost));
sctx->set_host_or_ip_ptr(sctx->host().str, sctx->host().length);
sctx->assign_priv_user(mysql->user, strlen(mysql->user));
sctx->assign_user(mysql->user, strlen(mysql->user));
sctx->assign_proxy_user("", 0);
sctx->assign_priv_host(my_localhost, strlen(my_localhost));
sctx->set_master_access(GLOBAL_ACLS); // Full rights
emb_transfer_connect_attrs(mysql);
/* Change database if necessary */
if (!(result= (db && db[0] && mysql_change_db(thd, db_lex_cstr, false))))
my_ok(thd);
thd->send_statement_status();
emb_read_query_result(mysql);
return result;
}
#else
int check_embedded_connection(MYSQL *mysql, const char *db)
{
/*
we emulate a COM_CHANGE_USER user here,
it's easier than to emulate the complete 3-way handshake
*/
char *buf, *end;
NET *net= &mysql->net;
THD *thd= (THD*)mysql->thd;
Security_context *sctx= thd->security_context();
size_t connect_attrs_len=
(mysql->server_capabilities & CLIENT_CONNECT_ATTRS &&
mysql->options.extension) ?
mysql->options.extension->connection_attributes_length : 0;
buf= my_alloca(USERNAME_LENGTH + SCRAMBLE_LENGTH + 1 + 2*NAME_LEN + 2 +
connect_attrs_len + 2);
if (mysql->options.client_ip)
{
sctx->set_host(my_strdup(mysql->options.client_ip, MYF(0)));
sctx->set_ip(my_strdup(sctx->get_host()->ptr(), MYF(0)));
}
else
sctx->set_host((char*)my_localhost);
sctx->host_or_ip= sctx->host->ptr();
if (acl_check_host(sctx->get_host()->ptr(), sctx->get_ip()->ptr()))
goto err;
/* construct a COM_CHANGE_USER packet */
end= strmake(buf, mysql->user, USERNAME_LENGTH) + 1;
memset(thd->scramble, 55, SCRAMBLE_LENGTH); // dummy scramble
thd->scramble[SCRAMBLE_LENGTH]= 0;
if (mysql->passwd && mysql->passwd[0])
{
*end++= SCRAMBLE_LENGTH;
scramble(end, thd->scramble, mysql->passwd);
end+= SCRAMBLE_LENGTH;
}
else
*end++= 0;
end= strmake(end, db ? db : "", NAME_LEN) + 1;
int2store(end, (ushort) mysql->charset->number);
end+= 2;
end= strmake(end, "mysql_native_password", NAME_LEN) + 1;
/* the server does the same as the client */
mysql->server_capabilities= mysql->client_flag;
end= (char *) send_client_connect_attrs(mysql, (uchar *) end);
/* acl_authenticate() takes the data from thd->net->read_pos */
thd->get_protocol_classic()->get_net()->read_pos= (uchar *)buf;
if (acl_authenticate(thd, COM_CHANGE_USER))
{
x_free(thd->security_context()->user().str);
goto err;
}
return 0;
err:
strmake(net->last_error, thd->main_da.message(), sizeof(net->last_error)-1);
memcpy(net->sqlstate,
mysql_errno_to_sqlstate(thd->main_da.sql_errno()),
sizeof(net->sqlstate)-1);
return 1;
}
#endif
} // extern "C"
void THD::clear_data_list()
{
while (first_data)
{
MYSQL_DATA *data= first_data;
first_data= data->embedded_info->next;
free_rows(data);
}
data_tail= &first_data;
free_rows(cur_data);
cur_data= 0;
}
static char *dup_str_aux(MEM_ROOT *root, const char *from, size_t length,
const CHARSET_INFO *fromcs, const CHARSET_INFO *tocs)
{
size_t dummy_offset;
uint dummy_err;
char *result;
/* 'tocs' is set 0 when client issues SET character_set_results=NULL */
if (tocs && String::needs_conversion(0, fromcs, tocs, &dummy_offset))
{
size_t new_len= (tocs->mbmaxlen * length) / fromcs->mbminlen + 1;
result= (char *)alloc_root(root, new_len);
length= copy_and_convert(result, new_len,
tocs, from, length, fromcs, &dummy_err);
}
else
{
result= (char *)alloc_root(root, length + 1);
memcpy(result, from, length);
}
result[length]= 0;
return result;
}
/*
creates new result and hooks it to the list
SYNOPSIS
alloc_new_dataset()
NOTES
allocs the MYSQL_DATA + embedded_query_result couple
to store the next query result,
links these two and attach it to the THD::data_tail
RETURN
pointer to the newly created query result
*/
MYSQL_DATA *THD::alloc_new_dataset()
{
MYSQL_DATA *data;
struct embedded_query_result *emb_data;
if (!my_multi_malloc(PSI_NOT_INSTRUMENTED,
MYF(MY_WME | MY_ZEROFILL),
&data, sizeof(*data),
&emb_data, sizeof(*emb_data),
NULL))
return NULL;
emb_data->prev_ptr= &data->data;
cur_data= data;
*data_tail= data;
data_tail= &emb_data->next;
data->embedded_info= emb_data;
return data;
}
/**
Stores server_status and warning_count in the current
query result structures.
@param thd current thread
@note Should be called after we get the recordset-result.
*/
static
bool
write_eof_packet(THD *thd, uint server_status, uint statement_warn_count)
{
if (!thd->mysql) // bootstrap file handling
return FALSE;
/*
The following test should never be true, but it's better to do it
because if 'is_fatal_error' is set the server is not going to execute
other queries (see the if test in dispatch_command / COM_QUERY)
*/
if (thd->is_fatal_error)
thd->server_status&= ~SERVER_MORE_RESULTS_EXISTS;
thd->cur_data->embedded_info->server_status= server_status;
/*
Don't send warn count during SP execution, as the warn_list
is cleared between substatements, and mysqltest gets confused
*/
thd->cur_data->embedded_info->warning_count=
(thd->sp_runtime_ctx ? 0 : min(statement_warn_count, 65535U));
return FALSE;
}
/*
allocs new query result and initialises Protocol::alloc
SYNOPSIS
Protocol::begin_dataset()
RETURN
0 if success
1 if memory allocation failed
*/
int Protocol_classic::begin_dataset()
{
MYSQL_DATA *data= m_thd->alloc_new_dataset();
if (!data)
return 1;
alloc= &data->alloc;
init_alloc_root(PSI_NOT_INSTRUMENTED, alloc, 8192, 0); /* Assume rowlength < 8192 */
alloc->min_malloc=sizeof(MYSQL_ROWS);