forked from oceanbase/oceanbase
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathob_load_data_impl.cpp
More file actions
4369 lines (4012 loc) · 160 KB
/
ob_load_data_impl.cpp
File metadata and controls
4369 lines (4012 loc) · 160 KB
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) 2021 OceanBase
* OceanBase CE is licensed under Mulan PubL v2.
* You can use this software according to the terms and conditions of the Mulan PubL v2.
* You may obtain a copy of Mulan PubL v2 at:
* http://license.coscl.org.cn/MulanPubL-2.0
* THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
* EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
* MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
* See the Mulan PubL v2 for more details.
*/
#define USING_LOG_PREFIX SQL_ENG
//#define TEST_MODE
#include "sql/engine/cmd/ob_load_data_impl.h"
#include <math.h>
#include "observer/omt/ob_multi_tenant.h"
#include "lib/oblog/ob_log_module.h"
#include "lib/string/ob_sql_string.h"
#include "storage/ob_partition_service.h"
#include "storage/ob_dml_param.h"
#include "sql/parser/ob_parser.h"
#include "sql/resolver/ob_resolver.h"
#include "sql/resolver/dml/ob_insert_stmt.h"
#include "sql/plan_cache/ob_sql_parameterization.h"
#include "sql/code_generator/ob_expr_generator_impl.h"
#include "sql/code_generator/ob_code_generator.h"
#include "sql/engine/ob_exec_context.h"
#include "sql/engine/cmd/ob_load_data_utils.h"
#include "sql/engine/ob_physical_plan_ctx.h"
#include "sql/resolver/expr/ob_raw_expr_util.h"
#include "share/ob_tenant_mgr.h"
#include "share/ob_tenant_memstore_info_operator.h"
#include "sql/resolver/ob_schema_checker.h"
using namespace oceanbase::sql;
using namespace oceanbase::common;
using namespace oceanbase::share;
using namespace oceanbase::share::schema;
using namespace oceanbase::storage;
namespace oceanbase {
namespace sql {
#ifdef TEST_MODE
static const int64_t INSERT_TASK_DROP_RATE = 1;
static void delay_process_by_probability(int64_t percentage)
{
if (OB_UNLIKELY(ObRandom::rand(1, 100) <= percentage)) {
usleep(RPC_BATCH_INSERT_TIMEOUT_US);
}
}
#endif
#define OW(statement) \
do { \
int inner_ret = statement; \
if (OB_UNLIKELY(OB_SUCCESS != inner_ret)) { \
LOG_WARN("fail to exec" #statement, K(inner_ret)); \
if (OB_SUCC(ret)) { \
ret = inner_ret; \
} \
} \
} while (0)
const char* ObLoadDataImpl::ZERO_FIELD_STRING = "0";
const char* ObLoadDataBase::SERVER_TENANT_MEMORY_EXAMINE_SQL =
"SELECT case when total_memstore_used < major_freeze_trigger * 1.02 then false else true end"
" as need_wait_freeze"
" FROM oceanbase.__all_virtual_tenant_memstore_info WHERE tenant_id = %ld"
" and svr_ip = '%d.%d.%d.%d' and svr_port = %d";
const char* log_file_column_names = "\nRow\tErrCode\tErrMsg\t\n";
const char* log_file_row_fmt = "%ld\t%d\t%s\t\n";
static const int64_t WAIT_INTERVAL_US = 1 * 1000 * 1000; // 1s
/*
* cat field strs into insert values
* source: expr_strs_, parsed_field_strs_
* target: insert_values_per_line_
* according to: valid_insert_column_info_store_
*/
int ObLoadDataImpl::collect_insert_row_strings()
{
int ret = OB_SUCCESS;
for (int64_t i = 0; OB_SUCC(ret) && i < insert_column_number_; ++i) {
const ObLoadTableColumnDesc& value_info = valid_insert_column_info_store_.at(i);
ObString& target = insert_values_per_line_.at(i);
if (value_info.is_set_values_) { // set expr
if (OB_LIKELY(value_info.array_ref_idx_ < set_assigned_column_number_)) {
target = expr_strs_.at(value_info.array_ref_idx_);
} else {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("invalid array index", K(ret), K(value_info.array_ref_idx_), K(expr_strs_.count()));
}
} else {
if (OB_LIKELY(value_info.array_ref_idx_ < file_column_number_)) {
target = parsed_field_strs_.at(value_info.array_ref_idx_);
} else {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("invalid array index", K(ret), K(value_info.array_ref_idx_), K(parsed_field_strs_.count()));
}
}
}
return ret;
}
bool ObLoadDataImpl::find_insert_column_info(const uint64_t target_column_id, int64_t& found_idx)
{
int ret_bool = false;
for (int64_t i = 0; i < valid_insert_column_info_store_.count(); ++i) {
if (valid_insert_column_info_store_.at(i).column_id_ == target_column_id) {
found_idx = i;
ret_bool = true;
break;
}
}
return ret_bool;
}
int ObLoadDataImpl::recursively_replace_varables(
ObRawExpr*& raw_expr, ObIAllocator& allocator, const ObSQLSessionInfo& session_info)
{
int ret = OB_SUCCESS;
bool is_user_variable = false;
bool is_stack_overflow = false;
if (OB_FAIL(check_stack_overflow(is_stack_overflow))) {
LOG_WARN("failed to check stack overflow", K(ret));
} else if (is_stack_overflow) {
ret = OB_SIZE_OVERFLOW;
LOG_WARN("stack overflow, maybe too deep recursive", K(ret));
} else if (OB_ISNULL(raw_expr)) {
ret = OB_INVALID_ARGUMENT;
LOG_WARN("invalid argument", K((ret)));
} else if (raw_expr->get_expr_type() == T_REF_COLUMN ||
raw_expr->get_expr_type() == T_OP_GET_USER_VAR) { // sys var is stopped at resolve
// 1. get variable name
ObString variable_name;
if (raw_expr->get_expr_type() == T_REF_COLUMN) {
ObColumnRefRawExpr* column_ref = static_cast<ObColumnRefRawExpr*>(raw_expr);
variable_name = column_ref->get_column_name();
} else {
is_user_variable = true;
ObSysFunRawExpr* func_expr = static_cast<ObSysFunRawExpr*>(raw_expr);
if (func_expr->get_children_count() != 1) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("sys func expr child num is not correct", K(ret));
} else {
ObConstRawExpr* c_expr = static_cast<ObConstRawExpr*>(func_expr->get_param_expr(0));
if (c_expr->get_value().get_type() != ObVarcharType) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("const expr child type is not correct", K(ret));
} else {
variable_name = c_expr->get_value().get_string();
}
}
}
// 2. replace it
bool need_replaced_to_loaded_data_from_file = false;
if (OB_SUCC(ret)) {
ObConstRawExpr* c_expr = NULL; // build a new const expr
int hash_ret = OB_SUCCESS;
int64_t idx = OB_INVALID_INDEX;
if (OB_ISNULL(c_expr = OB_NEWx(ObConstRawExpr, (&allocator)))) {
ret = OB_ALLOCATE_MEMORY_FAILED;
LOG_WARN("allocate const raw expr failed", K(ret));
} else if (OB_SUCCESS != (hash_ret = varname_field_idx_hashmap_.get_refactored(variable_name, idx))) {
if (OB_HASH_NOT_EXIST != hash_ret) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("unexpected hash ret", K(ret), K(hash_ret));
} else if (!is_user_variable) { // is a unknown column ref in right value, TODO arguable
LOG_WARN("unknown column name in set right expr, do nothing");
} else { // session user variable
// find the real value from session
ObObj var_obj;
ObSessionVariable tmp_sys_var;
if (OB_SUCC(session_info.get_user_variable(variable_name, tmp_sys_var))) {
var_obj = tmp_sys_var.value_;
var_obj.set_meta_type(tmp_sys_var.meta_);
} else {
if (OB_ERR_USER_VARIABLE_UNKNOWN == ret) {
LOG_WARN("no user variable: ", K(variable_name));
var_obj.set_null();
ret = OB_SUCCESS; // always return success no matter found or not
} else {
LOG_WARN("Unexpected ret code", K(ret), K(variable_name), K(tmp_sys_var));
}
}
if (OB_SUCC(ret)) {
c_expr->set_value(var_obj);
need_replaced_to_loaded_data_from_file = true;
}
}
} else {
if (OB_UNLIKELY(OB_INVALID_INDEX == idx)) { // double check
ret = OB_ERR_UNEXPECTED;
LOG_WARN("unexpected idx", K(ret));
} else {
// got it from stmt description
// replace it using an const expr with a blank string, waiting to be filling real str during executing
need_replaced_to_loaded_data_from_file = true;
ObObj obj;
obj.set_string(ObVarcharType, ObString::make_empty_string());
obj.set_collation_type(ObCharset::get_default_collation(ObCharset::get_default_charset()));
c_expr->set_value(obj);
}
}
if (OB_SUCC(ret) && need_replaced_to_loaded_data_from_file) {
LOG_DEBUG("replace variable name to field value", K(variable_name), K(idx), K(*raw_expr), K(*c_expr));
raw_expr = c_expr;
ObLoadDataReplacedExprInfo varable_info;
varable_info.replaced_expr = c_expr;
varable_info.correspond_file_field_idx = idx;
if (OB_FAIL(replaced_expr_value_index_store_.push_back(varable_info))) {
LOG_WARN("push back replaced variable infos array failed", K(ret));
}
}
}
} else {
// go recursively
int64_t child_cnt = raw_expr->get_param_count();
for (int64_t i = 0; OB_SUCC(ret) && i < child_cnt; ++i) {
ObRawExpr*& child_expr = raw_expr->get_param_expr(i);
if (OB_FAIL(recursively_replace_varables(child_expr, allocator, session_info))) {
LOG_WARN("replace reference column failed", K(ret));
}
} // end for
}
return ret;
}
int ObLoadDataImpl::generate_set_expr_strs(const ObSQLSessionInfo* session_info)
{
int ret = OB_SUCCESS;
// replace exprs
int64_t fast_var_access_count = replaced_expr_value_index_store_.count();
ObObj obj;
for (int64_t i = 0; OB_SUCC(ret) && i < fast_var_access_count; ++i) {
const ObLoadDataReplacedExprInfo& info = replaced_expr_value_index_store_.at(i);
if (OB_ISNULL(info.replaced_expr) || OB_UNLIKELY(OB_INVALID_INDEX_INT64 == info.correspond_file_field_idx)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("replaced_expr_value_index_store_ array is not inited", K(ret), K(info));
} else {
obj.set_string(ObVarcharType, parsed_field_strs_.at(info.correspond_file_field_idx));
obj.set_collation_type(ObCharset::get_default_collation(ObCharset::get_default_charset()));
info.replaced_expr->set_value(obj);
}
}
// build to sql string
for (int64_t i = 0; OB_SUCC(ret) && i < set_assigned_column_number_; ++i) {
ObRawExpr* right_expr = set_assigns_.at(i).expr_;
if (OB_ISNULL(right_expr)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("expr is null, impossible", K(ret));
} else {
char* buf = NULL;
int64_t str_len = 0;
ObString& expr_def = expr_strs_.at(i);
expr_printer_.init(expr_to_string_buf_.get_data(),
expr_to_string_buf_.get_capacity(),
&str_len,
get_timezone_info(session_info));
if (OB_FAIL(expr_printer_.do_print(right_expr, T_NONE_SCOPE, true))) {
LOG_WARN("print expr definition failed", K(ret));
} else if (OB_ISNULL(buf = static_cast<char*>(expr_calc_allocator_.alloc(str_len * sizeof(char))))) {
ret = OB_ALLOCATE_MEMORY_FAILED;
LOG_WARN("allocate memory failed", K(ret));
} else {
MEMCPY(buf, expr_to_string_buf_.get_data(), str_len);
expr_def.assign_ptr(buf, static_cast<int32_t>(str_len));
}
}
}
return ret;
}
// replace each variable in table assignment exprs into a const value
// eg: suppose that we have a stmt "load file 'mydata.csv' into table t1 (c1, c2) set c3 = c1 + c2"
// we can get the expr of 'c3 = c1 + c2' after resolve set clause
// when c1 c2 loaded from 'mydata.csv', say c1 = a and c2 = b, we need to take a b into expr to calculate c3
// to locate c1 c2 from expr 'c3 = c1 + c2' in a short time, we store all the columns/user variables into
// fast_variables_access
int ObLoadDataImpl::analyze_exprs_and_replace_variables(ObIAllocator& allocator, const ObSQLSessionInfo& session_info)
{
int ret = OB_SUCCESS;
for (int64_t i = 0; OB_SUCC(ret) && i < set_assigns_.count(); ++i) {
ObRawExpr*& right_expr = set_assigns_.at(i).expr_;
if (OB_FAIL(recursively_replace_varables(right_expr, allocator, session_info))) {
LOG_WARN("recursively replace var expr failed", K(ret));
}
}
return ret;
}
int ObLoadDataBase::generate_fake_field_strs(
ObIArray<ObString>& file_col_values, ObIAllocator& allocator, const char id_char)
{
int ret = OB_SUCCESS;
char* buf = NULL;
/* to generate string like "F1F2F3...F99....Fn" into buf
* maxn = 512
*/
int64_t buf_len = 6 * file_col_values.count();
int64_t pos = 0;
if (OB_ISNULL(buf = static_cast<char*>(allocator.alloc(buf_len * sizeof(char))))) {
ret = OB_ALLOCATE_MEMORY_FAILED;
LOG_WARN("alloc memory failed", K(ret));
} else {
for (int64_t i = 0; OB_SUCC(ret) && i < file_col_values.count(); ++i) {
int64_t pos_bak = pos;
if (OB_FAIL(databuff_printf(buf, buf_len, pos, "%c%ld%c", id_char, i, '\0'))) { // F1 F2 ..
LOG_WARN("generate str failed", K(ret), K(pos), K(buf_len));
} else {
file_col_values.at(i).assign(buf + pos_bak, pos - pos_bak);
}
}
LOG_DEBUG("generate fake field result", K(file_col_values));
}
return ret;
}
int ObLoadDataBase::construct_insert_sql(ObSqlString& insert_sql, const ObString& q_name,
ObIArray<ObLoadTableColumnDesc>& desc, ObIArray<ObString>& insert_values, int64_t num_rows)
{
int ret = OB_SUCCESS;
insert_sql.reuse();
char q = share::is_oracle_mode() ? '"' : '`';
if (OB_UNLIKELY(q_name.empty()) || OB_UNLIKELY(desc.count() * num_rows != insert_values.count())) {
ret = OB_INVALID_ARGUMENT;
}
OX(ret = insert_sql.assign("INSERT INTO "));
OX(ret = insert_sql.append(q_name));
for (int64_t i = 0; OB_SUCC(ret) && i < desc.count(); ++i) {
OX(ret = insert_sql.append(0 == i ? "(" : ","));
OX(ret = insert_sql.append_fmt("%c%.*s%c", q, desc.at(i).column_name_.length(), desc.at(i).column_name_.ptr(), q));
}
OX(ret = insert_sql.append(") VALUES "));
for (int64_t i = 0; OB_SUCC(ret) && i < insert_values.count(); ++i) {
OX(ret = insert_sql.append(i % desc.count() == 0 ? (i == 0 ? "(" : "),(") : ","));
OX(ret = insert_sql.append_fmt("'%.*s'", insert_values.at(i).length(), insert_values.at(i).ptr()));
}
OX(ret = insert_sql.append(")"));
if (OB_FAIL(ret)) {
LOG_WARN("fail to append data", K(ret), K(insert_sql));
}
return ret;
}
int ObLoadDataBase::make_parameterize_stmt(
ObExecContext& ctx, ObSqlString& insertsql, ParamStore& param_store, ObDMLStmt*& insert_stmt)
{
int ret = OB_SUCCESS;
ObSQLSessionInfo* session = NULL;
if (OB_ISNULL(session = ctx.get_my_session())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("session is null", K(ret));
} else if (OB_ISNULL(ctx.get_sql_ctx()) || OB_ISNULL(ctx.get_sql_ctx()->schema_guard_)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("sql ctx is null", K(ret));
} else {
ObParser parser(ctx.get_allocator(), session->get_sql_mode());
ParseResult parse_result;
SqlInfo not_param_info;
bool is_transform_outline = false;
ObMaxConcurrentParam::FixParamStore fixed_param_store(
ObNewModIds::OB_COMMON_ARRAY, ObWrapperAllocator(&ctx.get_allocator()));
if (OB_FAIL(parser.parse(insertsql.string(), parse_result))) {
LOG_WARN("paser template insert sql failed", K(ret));
} else if (OB_FAIL(ObSqlParameterization::transform_syntax_tree(ctx.get_allocator(),
*session,
NULL,
0, // no rewrite sql here
parse_result.result_tree_,
not_param_info,
param_store,
NULL,
fixed_param_store,
is_transform_outline))) {
LOG_WARN("parameterize parser tree failed", K(ret));
} else {
ObResolverParams resolver_ctx;
ObSchemaChecker schema_checker;
schema_checker.init(*(ctx.get_sql_ctx()->schema_guard_));
resolver_ctx.allocator_ = &ctx.get_allocator();
resolver_ctx.schema_checker_ = &schema_checker;
resolver_ctx.session_info_ = session;
resolver_ctx.param_list_ = ¶m_store;
resolver_ctx.database_id_ = session->get_database_id();
resolver_ctx.disable_privilege_check_ = PRIV_CHECK_FLAG_DISABLE;
resolver_ctx.expr_factory_ = ctx.get_expr_factory();
resolver_ctx.stmt_factory_ = ctx.get_stmt_factory();
if (OB_ISNULL(ctx.get_stmt_factory())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("invalid argument", K(ret), KP(ctx.get_stmt_factory()));
} else if (OB_ISNULL(ctx.get_stmt_factory()->get_query_ctx())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("invalid argument", K(ret), KP(ctx.get_stmt_factory()->get_query_ctx()));
} else {
resolver_ctx.query_ctx_ = ctx.get_stmt_factory()->get_query_ctx();
resolver_ctx.query_ctx_->question_marks_count_ = param_store.count();
ObResolver resolver(resolver_ctx);
ObStmt* astmt = NULL;
ParseNode* stmt_tree = parse_result.result_tree_->children_[0];
if (OB_ISNULL(stmt_tree) || OB_ISNULL(ctx.get_stmt_factory()->get_query_ctx())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("invalid argument", K(ret), K(stmt_tree));
} else if (OB_FAIL(resolver.resolve(ObResolver::IS_NOT_PREPARED_STMT, *stmt_tree, astmt))) {
LOG_WARN("resolve sql failed", K(ret), K(insertsql));
} else {
insert_stmt = static_cast<ObDMLStmt*>(astmt);
ctx.get_stmt_factory()->get_query_ctx()->reset();
}
}
}
}
return ret;
}
int ObLoadDataBase::memory_check_remote(uint64_t tenant_id, bool& need_wait_minor_freeze)
{
int ret = OB_SUCCESS;
ObTenantManager& tenant_mgr = ObTenantManager::get_instance();
if (OB_UNLIKELY(!tenant_mgr.has_tenant(tenant_id))) {
ret = OB_ERR_UNEXPECTED;
LOG_ERROR("tenant no found", K(tenant_id), K(ret));
} else {
int64_t active_memstore_used = 0;
int64_t total_memstore_used = 0;
int64_t major_freeze_trigger = 0;
int64_t memstore_limit = 0;
int64_t freeze_cnt = 0;
if (OB_FAIL(tenant_mgr.get_tenant_memstore_cond(
tenant_id, active_memstore_used, total_memstore_used, major_freeze_trigger, memstore_limit, freeze_cnt))) {
LOG_WARN("fail to get memstore used", K(ret));
} else {
if (total_memstore_used > (memstore_limit - major_freeze_trigger) / 2 + major_freeze_trigger) {
need_wait_minor_freeze = true;
} else {
need_wait_minor_freeze = false;
}
}
LOG_DEBUG("load data check tenant memory usage",
K(active_memstore_used),
K(total_memstore_used),
K(major_freeze_trigger),
K(memstore_limit),
K(freeze_cnt),
K(need_wait_minor_freeze));
}
return ret;
}
/*
description:
figure out how much columns should to be inserted, who are they, and where are they from
all the information will be saved into valid_insert_column_infos array
in:
file_field_def_
set_assigns_
out:
valid_insert_column_info_store_
insert_column_names_
*/
int ObLoadDataImpl::summarize_insert_columns()
{
int ret = OB_SUCCESS;
// 1. a valid insert column, from file_field_def array, is defined in col_name_or_user_var clause of load sql
// e.g. INTO TABLE t1 (c1, c2, @a, @b), we got c1,c2 and discard @a, @b
for (int64_t i = 0; OB_SUCC(ret) && i < file_field_def_.count(); ++i) {
ObLoadDataStmt::FieldOrVarStruct& one_file_field_def = file_field_def_.at(i);
if (one_file_field_def.is_table_column_) {
ObLoadTableColumnDesc tmp_info;
tmp_info.is_set_values_ = false;
tmp_info.column_name_ = one_file_field_def.field_or_var_name_;
tmp_info.column_id_ = one_file_field_def.column_id_;
tmp_info.column_type_ = one_file_field_def.column_type_;
tmp_info.array_ref_idx_ = i; // array offset
if (OB_FAIL(valid_insert_column_info_store_.push_back(tmp_info))) {
LOG_WARN("push str failed", K(ret));
} else if (OB_FAIL(insert_column_names_.push_back(tmp_info.column_name_))) {
LOG_WARN("push back empty string failed", K(ret));
}
}
}
// 2. a valid insert column, from set_assigns array, is defined in set clause of load sql
for (int64_t i = 0; OB_SUCC(ret) && i < set_assigns_.count(); ++i) {
ObAssignment& one_set_assign = set_assigns_.at(i);
if (OB_ISNULL(one_set_assign.column_expr_)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("set assign expr is null", K(ret));
} else {
uint64_t set_col_id = one_set_assign.column_expr_->get_column_id();
int64_t found_index = OB_INVALID_INDEX_INT64;
if (find_insert_column_info(set_col_id, found_index)) {
// overwrite the origin insert column, defined in 1
ObLoadTableColumnDesc& tmp_info = valid_insert_column_info_store_.at(found_index);
tmp_info.is_set_values_ = true;
tmp_info.array_ref_idx_ = i;
} else {
// a new insert column is defined by set expr
ObLoadTableColumnDesc tmp_info;
tmp_info.column_name_ = one_set_assign.column_expr_->get_column_name();
tmp_info.column_id_ = one_set_assign.column_expr_->get_column_id();
tmp_info.column_type_ = one_set_assign.column_expr_->get_result_type().get_type();
tmp_info.is_set_values_ = true;
tmp_info.array_ref_idx_ = i;
if (OB_FAIL(valid_insert_column_info_store_.push_back(tmp_info))) {
LOG_WARN("push str failed", K(ret));
} else if (OB_FAIL(insert_column_names_.push_back(tmp_info.column_name_))) {
LOG_WARN("push back empty string failed", K(ret));
}
}
}
}
// now wet got valid_insert_column_info_store_
if (OB_SUCC(ret)) {
insert_column_number_ = valid_insert_column_info_store_.count();
if (OB_FAIL(ObLoadDataUtils::init_empty_string_array(insert_values_per_line_, insert_column_number_))) {
LOG_WARN("init field str array failed", K(ret));
}
LOG_DEBUG("LOAD DATA insert column information is ", K_(valid_insert_column_info_store));
}
// aux1. figure out which column, insert directly, is not a string type.
for (int64_t i = 0; OB_SUCC(ret) && i < file_field_def_.count(); ++i) {
ObLoadDataStmt::FieldOrVarStruct& one_file_field_def = file_field_def_.at(i);
if (one_file_field_def.is_table_column_) {
if (one_file_field_def.column_type_ != ObVarcharType && one_file_field_def.column_type_ != ObCharType &&
one_file_field_def.column_type_ != ObHexStringType && one_file_field_def.column_type_ != ObTextType &&
one_file_field_def.column_type_ != ObRawType) {
if (OB_FAIL(field_type_bit_set_.add_member(i))) {
LOG_WARN("add field index to bitset failed", K(ret));
} else {
non_string_type_direct_insert_column_count_++;
}
}
}
}
// aux2. find out the expr value
for (int64_t i = 0; OB_SUCC(ret) && i < insert_column_number_; ++i) {
const ObLoadTableColumnDesc& insert_info = valid_insert_column_info_store_.at(i);
if (insert_info.is_set_values_) {
if (OB_FAIL(expr_value_bitset_.add_member(i))) {
LOG_WARN("add field index to bitset failed", K(ret));
}
}
}
return ret;
}
int ObLoadDataImpl::build_file_field_var_hashmap()
{
int ret = OB_SUCCESS;
if (OB_FAIL(varname_field_idx_hashmap_.create(COLUMN_MAP_BUCKET_NUM, ObModIds::OB_SQL_EXECUTOR))) {
LOG_WARN("failed to create hash map", K(ret));
}
for (int64_t i = 0; OB_SUCC(ret) && i < file_field_def_.count(); ++i) {
int hash_ret = OB_SUCCESS;
ObString& variable_name = file_field_def_.at(i).field_or_var_name_;
if (OB_SUCCESS != (hash_ret = varname_field_idx_hashmap_.set_refactored(variable_name, i))) {
if (hash_ret != OB_HASH_EXIST) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("set varname_to_field_id_ failed", K(hash_ret), K(ret), K(variable_name));
} else {
LOG_WARN("loaded column name duplicated", K(hash_ret), K(ret), K(variable_name));
// choose latter
if (OB_FAIL(varname_field_idx_hashmap_.set_refactored(variable_name, i, 1))) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("set varname_to_field_id_ failed", K(hash_ret), K(ret), K(variable_name));
}
}
}
}
return ret;
}
/*
* if param_a != param_b: this variable is from a field of data file,
* calc the correspond field index via param string value
* return the index
*/
int ObLoadDataBase::calc_param_offset(const ObObjParam& param_a, const ObObjParam& param_b, int64_t& idx)
{
int ret = OB_SUCCESS;
if (OB_UNLIKELY(!param_a.is_varchar_or_char() || !param_b.is_varchar_or_char())) {
ret = OB_ERR_UNEXPECTED;
} else if (param_a.get_string().compare(param_b.get_string()) != 0) {
const ObObjParam& value = param_a;
const char* value_ptr = value.get_string_ptr();
/* string should like "[F|f][0-9]+" */
if (value.get_string_len() < 2 || NULL == value_ptr) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("no possible, the values are changed", K(ret));
} else {
int64_t temp_idx = 0;
for (int32_t j = 1; OB_SUCC(ret) && j < value.get_string_len(); ++j) {
char cur_char = *(value_ptr + j);
if (cur_char > '9' || cur_char < '0') {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("no possible, the values are changed", K(ret));
} else {
temp_idx *= 10;
temp_idx += cur_char - '0';
}
}
idx = temp_idx;
}
}
return ret;
}
int ObLoadDataImpl::do_local_sync_insert(ObPhysicalPlanCtx& plan_ctx)
{
int ret = OB_SUCCESS;
int64_t affected_rows = 0;
int64_t values_count = insert_values_per_line_.count();
if (values_count <= 0 || insert_column_number_ <= 0 ||
values_count != insert_column_number_ * (values_count / insert_column_number_)) {
ret = OB_INVALID_ARGUMENT;
LOG_WARN("insert values are invalid", K(ret), K(values_count), K(insert_column_number_));
} else {
ObSqlString insert_once_sql;
if (OB_FAIL(ObLoadDataUtils::build_insert_sql_string_head(
load_args_.dupl_action_, back_quoted_db_table_name_, insert_column_names_, insert_once_sql))) {
LOG_WARN("gen insert sql keys failed", K(ret));
} else if (OB_FAIL(ObLoadDataUtils::append_values_in_local_process(insert_column_number_,
values_count,
insert_values_per_line_,
expr_value_bitset_,
insert_once_sql,
escape_data_buffer_))) {
LOG_WARN("append values failed", K(ret));
} else {
if (OB_FAIL(GCTX.sql_proxy_->write(load_args_.tenant_id_, insert_once_sql.ptr(), affected_rows))) {
LOG_WARN("fail to write sql as one stmt", K(ret));
}
}
}
plan_ctx.add_affected_rows(affected_rows);
if (OB_ERR_PRIMARY_KEY_DUPLICATE == ret) {
plan_ctx.add_row_duplicated_count(1);
}
return ret;
}
int ObLoadDataImpl::take_record_for_failed_rows(ObPhysicalPlanCtx& plan_ctx, ObLoadbuffer* complete_task)
{
int ret = OB_SUCCESS;
if (OB_ISNULL(complete_task)) {
ret = OB_INVALID_ARGUMENT;
LOG_WARN("invalid argument", K(ret));
} else {
ObIArray<int64_t>& file_line_nums = complete_task->get_file_line_number(); // line number in file
ObIArray<int16_t>& failed_row_idxs = complete_task->get_failed_row_idx(); // row idx in buff [0, 1000)
ObIArray<int>& err_codes = complete_task->get_error_code_array();
int64_t task_total_row_count = complete_task->get_stored_row_count();
int64_t err_rows_count = 0;
int64_t skipped_row_count = 0;
bool is_all_rows_failed = ObLoadDataUtils::has_flag(
complete_task->get_task_status(), static_cast<int64_t>(ObLoadTaskResultFlag::ALL_ROWS_FAILED));
bool remote_exec_failed = ObLoadDataUtils::has_flag(
complete_task->get_task_status(), static_cast<int64_t>(ObLoadTaskResultFlag::RPC_REMOTE_PROCESS_ERROR));
if (remote_exec_failed) {
ret = OB_ERR_UNEXPECTED;
} else {
if (!is_all_rows_failed) { // normal fail return
const ObWarningBuffer* warnings_buf = common::ob_get_tsi_warning_buffer();
int64_t warn_buff_size = 0;
if (OB_ISNULL(warnings_buf)) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("can not get thread warnings buffer");
} else {
warn_buff_size = static_cast<int64_t>(warnings_buf->get_buffer_size());
}
int64_t failed_rows_count = complete_task->get_failed_row_idx().count();
for (int64_t i = 0; OB_SUCC(ret) && i < failed_rows_count; ++i) {
int err_code = err_codes.at(i);
int16_t row_idx = failed_row_idxs.at(i);
int64_t line_number = -1;
if (OB_ERR_PRIMARY_KEY_DUPLICATE == err_code) {
skipped_row_count++;
} else {
err_rows_count++;
}
if (OB_UNLIKELY(row_idx >= file_line_nums.count())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("invalid row index", K(ret));
} else {
line_number = file_line_nums.at(row_idx);
const char* strerr = ::oceanbase::common::ob_strerror(err_code);
total_err_lines_++;
if (total_err_lines_ < warn_buff_size) {
FORWARD_USER_ERROR_MSG(err_code, "%s at row %ld", strerr, line_number);
} else {
LOG_WARN("load data warning buff is full", K(strerr), "at row", line_number);
}
}
LOG_DEBUG("error code is", K(line_number), K(err_code));
}
} else {
// TODO dump file
LOG_WARN("load data task failed", "task_id", complete_task->get_task_id());
err_rows_count = task_total_row_count;
}
}
plan_ctx.add_affected_rows(task_total_row_count - skipped_row_count - err_rows_count);
plan_ctx.add_row_duplicated_count(skipped_row_count);
}
return ret;
}
int ObLoadDataBase::memory_wait_local(
ObExecContext& ctx, const ObPartitionKey& part_key, ObAddr& server_addr, int64_t& total_wait_secs)
{
int ret = OB_SUCCESS;
static const int64_t WAIT_INTERVAL_US = 1 * 1000 * 1000; // 1s
ObSQLSessionInfo* session = NULL;
ObMySQLProxy* sql_proxy_ = NULL;
ObIPartitionLocationCache* loc_cache = NULL;
SMART_VAR(ObMySQLProxy::MySQLResult, res)
{
sqlclient::ObMySQLResult* result = NULL;
ObSqlString sql;
int64_t start_wait_ts = ObTimeUtil::current_time();
int64_t wait_timeout_ts = 0;
uint64_t tenant_id = OB_INVALID_TENANT_ID;
if (OB_UNLIKELY(!part_key.is_valid())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("invalid server addr", K(ret), K(part_key));
} else if (OB_ISNULL(loc_cache = ctx.get_task_exec_ctx().get_partition_location_cache())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("invalid partition locatition cache", K(ret));
} else if (OB_ISNULL((sql_proxy_ = GCTX.sql_proxy_))) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("sql_proxy is null", K(ret));
} else if (OB_ISNULL(session = ctx.get_my_session())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("session is null", K(ret));
} else {
session->get_query_timeout(wait_timeout_ts);
tenant_id = session->get_effective_tenant_id();
// print info
LOG_INFO("LOAD DATA is suspended until the memory is available", K(part_key), K(server_addr), K(total_wait_secs));
}
bool force_renew = false;
bool need_wait_freeze = true;
ObAddr leader_addr;
while (OB_SUCC(ret) && need_wait_freeze) {
usleep(WAIT_INTERVAL_US);
leader_addr.reset();
res.reuse();
if (OB_FAIL(ObLoadDataUtils::check_session_status(*session))) {
LOG_WARN("session is not valid during wait", K(ret));
} else if (OB_FAIL(loc_cache->get_strong_leader(part_key, leader_addr, force_renew))) {
LOG_WARN("get partition location cache failed", K(ret), K(part_key));
} else if (OB_FAIL(sql.assign_fmt(SERVER_TENANT_MEMORY_EXAMINE_SQL,
tenant_id,
(leader_addr.get_ipv4() >> 24) & 0XFF,
(leader_addr.get_ipv4() >> 16) & 0XFF,
(leader_addr.get_ipv4() >> 8) & 0XFF,
(leader_addr.get_ipv4()) & 0XFF,
leader_addr.get_port()))) {
LOG_WARN("fail to append sql", K(ret), K(tenant_id), K(leader_addr));
} else if (OB_FAIL(sql_proxy_->read(res, OB_SYS_TENANT_ID, sql.ptr()))) {
LOG_WARN("fail to execute sql", K(ret), K(sql));
} else if (NULL == (result = res.get_result())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("fail to get sql result", K(ret));
} else if (OB_FAIL(result->next())) {
LOG_WARN("fail to get result, force renew location", K(ret), K(leader_addr));
if (OB_ITER_END == ret) {
force_renew = true;
ret = OB_SUCCESS;
}
} else {
force_renew = false;
EXTRACT_BOOL_FIELD_MYSQL(*result, "need_wait_freeze", need_wait_freeze);
// LOG_INFO("LOAD DATA is waiting for tenant memory available",
// K(waited_seconds), K(total_wait_secs), K(tenant_id));
}
}
// print info
if (OB_SUCC(ret)) {
int64_t wait_secs = (ObTimeUtil::current_time() - start_wait_ts) / 1000000;
total_wait_secs += wait_secs;
if (leader_addr != server_addr) {
LOG_INFO("LOAD DATA location change", K(part_key), "old_addr", server_addr, "new_addr", leader_addr);
server_addr = leader_addr;
}
LOG_INFO("LOAD DATA is resumed", "waited_seconds", wait_secs, K(total_wait_secs));
}
}
return ret;
}
// wait minor/major freeze, assuming partition id is not changed
int ObLoadDataImpl::wait_server_memory_dump(ObExecContext& ctx, uint64_t partition_id)
{
int ret = OB_SUCCESS;
ObPartitionKey part_key;
ObSQLSessionInfo* session = NULL;
ObIPartitionLocationCache* partition_locatition_cache = NULL;
ObMySQLProxy* sql_proxy_ = NULL;
SMART_VAR(ObMySQLProxy::MySQLResult, res)
{
sqlclient::ObMySQLResult* result = NULL;
ObAddr leader_addr;
ObSqlString sql;
int64_t start_wait_ts = ObTimeUtil::current_time();
int64_t current_ts = 0;
int64_t waited_seconds = 0;
bool need_wait_freeze = true;
int64_t wait_timeout_ts = 0;
int64_t total_wait_secs_back = total_wait_secs_;
uint64_t tenant_id = OB_INVALID_TENANT_ID;
if (OB_FAIL(part_key.init(load_args_.table_id_, partition_id, 0))) {
LOG_WARN("partition key init failed", K(load_args_.table_id_), K(partition_id), K(part_num_));
} else if (OB_ISNULL(partition_locatition_cache = ctx.get_task_exec_ctx().get_partition_location_cache())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("invalid partition locatition cache", K(ret));
} else if (OB_ISNULL((sql_proxy_ = GCTX.sql_proxy_))) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("sql_proxy is null", K(ret));
} else if (OB_ISNULL(session = ctx.get_my_session())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("session is null", K(ret));
} else {
session->get_query_timeout(wait_timeout_ts);
tenant_id = session->get_effective_tenant_id();
}
while (OB_SUCC(ret) && need_wait_freeze) {
leader_addr.reset();
res.reuse();
if (OB_FAIL(partition_locatition_cache->get_strong_leader(part_key, leader_addr))) {
LOG_WARN("get partition location cache failed", K(ret), K(part_key));
} else if (OB_FAIL(sql.assign_fmt(SERVER_TENANT_MEMORY_EXAMINE_SQL,
tenant_id,
(leader_addr.get_ipv4() >> 24) & 0XFF,
(leader_addr.get_ipv4() >> 16) & 0XFF,
(leader_addr.get_ipv4() >> 8) & 0XFF,
(leader_addr.get_ipv4()) & 0XFF,
leader_addr.get_port()))) {
LOG_WARN("fail to append sql", K(ret), K(tenant_id), K(leader_addr));
} else if (OB_FAIL(sql_proxy_->read(res, OB_SYS_TENANT_ID, sql.ptr()))) {
LOG_WARN("fail to execute sql", K(ret), K(sql));
} else if (NULL == (result = res.get_result())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("fail to get sql result", K(ret));
} else if (OB_FAIL(result->next())) {
LOG_WARN("fail to get result", K(ret));
} else {
EXTRACT_BOOL_FIELD_MYSQL(*result, "need_wait_freeze", need_wait_freeze);
if (OB_SUCC(ret) && need_wait_freeze) {
current_ts = ObTimeUtil::current_time();
waited_seconds = (current_ts - start_wait_ts) / (1000 * 1000);
if (OB_FAIL(ObLoadDataUtils::check_session_status(*session))) {
LOG_WARN("session is invalid failed during waiting for tenant memory available ",
K(ret),
K(tenant_id),
K(waited_seconds),
K(current_ts),
K(wait_timeout_ts));
} else {
total_wait_secs_ = total_wait_secs_back + waited_seconds;
LOG_INFO("LOAD DATA is waiting for tenant memory available",
K(waited_seconds),
K_(total_wait_secs),
K(tenant_id));
usleep(WAIT_INTERVAL_US);
}
}
}
};
// Any wait signal, proposed before the current timestamp
// by other returned tasks from the same server, will be ignored
if (OB_SUCC(ret)) {
if (OB_FAIL(server_last_freeze_ts_hashmap_.set_refactored(leader_addr, ObTimeUtil::current_time(), 1))) {
LOG_WARN("set server last freeze timestamp failed", K(ret));
} else {
LOG_INFO("LOAD DATA finish waiting, restart again", K(waited_seconds), K(tenant_id));
}
}
}
return ret;
}
int ObLoadDataImpl::handle_complete_task(ObPhysicalPlanCtx& plan_ctx, ObLoadbuffer* complete_task)
{
int ret = OB_SUCCESS;
if (OB_ISNULL(complete_task)) {
ret = OB_INVALID_ARGUMENT;
LOG_WARN("invalid argument", K(ret));
} else {
int64_t task_status = complete_task->get_task_status();
if (OB_LIKELY(
!ObLoadDataUtils::has_flag(task_status, static_cast<int64_t>(ObLoadTaskResultFlag::HAS_FAILED_ROW))) &&
OB_LIKELY(!ObLoadDataUtils::has_flag(task_status, static_cast<int64_t>(ObLoadTaskResultFlag::TIMEOUT)))) {
// succ
plan_ctx.add_affected_rows(complete_task->get_stored_row_count());
} else {
// handle fail
if (OB_FAIL(take_record_for_failed_rows(plan_ctx, complete_task))) {
LOG_WARN("failed to record failed rows", K(ret));
}
}
}
LOG_DEBUG("handle one stale task", KPC(complete_task));
return ret;
}
int ObLoadDataImpl::get_server_last_freeze_ts(const ObAddr& server_addr, int64_t& last_freeze_ts)
{
int ret = OB_SUCCESS;
int hash_ret = OB_SUCCESS;
if (OB_SUCCESS != (hash_ret = server_last_freeze_ts_hashmap_.get_refactored(server_addr, last_freeze_ts))) {
if (OB_HASH_NOT_EXIST == hash_ret) {
if (OB_FAIL(server_last_freeze_ts_hashmap_.set_refactored(server_addr, 0))) {
LOG_WARN("set server last freeze timestamp failed", K(ret), K(server_addr));
} else {
last_freeze_ts = 0; // is illegal but works
}
} else {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("get server last freeze timestamp failed", K(ret), K(server_addr));
}
}
return ret;
}
/*
* 1. handle one complete task
* 2. send one task
* 3. switch the complete task buffer to current
*/
int ObLoadDataImpl::send_and_switch_buffer(
ObExecContext& ctx, ObPhysicalPlanCtx& plan_ctx, ObPartitionBufferCtrl* part_buf_ctrl)
{
int ret = OB_SUCCESS;
bool need_failed_callback = true;
ObLoadbuffer* buffer = NULL;
ObIPartitionLocationCache* partition_locatition_cache = NULL;
if (OB_ISNULL(part_buf_ctrl)) {
ret = OB_INVALID_ARGUMENT;
LOG_WARN("invalid argument", K(ret));
} else if (OB_ISNULL(buffer = part_buf_ctrl->get_buffer<ObLoadbuffer>())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("buffer is null from partition buffer control", K(ret), KP(part_buf_ctrl));
} else if (OB_ISNULL(partition_locatition_cache = ctx.get_task_exec_ctx().get_partition_location_cache())) {
ret = OB_ERR_UNEXPECTED;
LOG_WARN("invalid partition locatition cache", K(ret));
} else {
// a) push finished buffer --syncThd--> b) on_task_finished
// ^ |
// | |
// RPC callback Thd wakeup
// | |
// | v
// d) pop finished buffer <--syncThd-- c) on_next_task_id
// 1. wait next task id and pop an complete buffer
wait_task_timer_.start_stat();
int64_t task_id = -1;
ObLoadbuffer* complete_buffer = NULL;
if (OB_FAIL(task_controller_.on_next_task())) {
need_failed_callback = false;
LOG_WARN("get next task id failed", K(ret));
} else if (OB_FAIL(complete_task_array_.pop(complete_buffer))) {
LOG_WARN("pop complete buffer failed", K(ret));
} else if (OB_ISNULL(complete_buffer)) {
ret = OB_ERR_UNEXPECTED;