/
SemanticAnalyzer.java
8044 lines (7155 loc) · 307 KB
/
SemanticAnalyzer.java
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
/**
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.hadoop.hive.ql.parse;
import java.io.IOException;
import java.io.Serializable;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Map.Entry;
import java.util.Set;
import java.util.TreeSet;
import java.util.regex.Pattern;
import java.util.regex.PatternSyntaxException;
import org.apache.commons.lang.StringUtils;
import org.apache.hadoop.fs.ContentSummary;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.PathFilter;
import org.apache.hadoop.hive.common.FileUtils;
import org.apache.hadoop.hive.common.JavaUtils;
import org.apache.hadoop.hive.conf.HiveConf;
import org.apache.hadoop.hive.conf.HiveConf.ConfVars;
import org.apache.hadoop.hive.metastore.Warehouse;
import org.apache.hadoop.hive.metastore.api.FieldSchema;
import org.apache.hadoop.hive.metastore.api.MetaException;
import org.apache.hadoop.hive.metastore.api.Order;
import org.apache.hadoop.hive.ql.Context;
import org.apache.hadoop.hive.ql.exec.AbstractMapJoinOperator;
import org.apache.hadoop.hive.ql.exec.ColumnInfo;
import org.apache.hadoop.hive.ql.exec.ConditionalTask;
import org.apache.hadoop.hive.ql.exec.ExecDriver;
import org.apache.hadoop.hive.ql.exec.FetchTask;
import org.apache.hadoop.hive.ql.exec.FileSinkOperator;
import org.apache.hadoop.hive.ql.exec.FunctionInfo;
import org.apache.hadoop.hive.ql.exec.FunctionRegistry;
import org.apache.hadoop.hive.ql.exec.GroupByOperator;
import org.apache.hadoop.hive.ql.exec.JoinOperator;
import org.apache.hadoop.hive.ql.exec.MapRedTask;
import org.apache.hadoop.hive.ql.exec.Operator;
import org.apache.hadoop.hive.ql.exec.OperatorFactory;
import org.apache.hadoop.hive.ql.exec.RecordReader;
import org.apache.hadoop.hive.ql.exec.RecordWriter;
import org.apache.hadoop.hive.ql.exec.ReduceSinkOperator;
import org.apache.hadoop.hive.ql.exec.RowSchema;
import org.apache.hadoop.hive.ql.exec.TableScanOperator;
import org.apache.hadoop.hive.ql.exec.Task;
import org.apache.hadoop.hive.ql.exec.TaskFactory;
import org.apache.hadoop.hive.ql.exec.UnionOperator;
import org.apache.hadoop.hive.ql.exec.Utilities;
import org.apache.hadoop.hive.ql.hooks.ReadEntity;
import org.apache.hadoop.hive.ql.hooks.WriteEntity;
import org.apache.hadoop.hive.ql.io.CombineHiveInputFormat;
import org.apache.hadoop.hive.ql.io.HiveFileFormatUtils;
import org.apache.hadoop.hive.ql.io.HiveOutputFormat;
import org.apache.hadoop.hive.ql.lib.DefaultGraphWalker;
import org.apache.hadoop.hive.ql.lib.DefaultRuleDispatcher;
import org.apache.hadoop.hive.ql.lib.Dispatcher;
import org.apache.hadoop.hive.ql.lib.GraphWalker;
import org.apache.hadoop.hive.ql.lib.Node;
import org.apache.hadoop.hive.ql.lib.NodeProcessor;
import org.apache.hadoop.hive.ql.lib.Rule;
import org.apache.hadoop.hive.ql.lib.RuleRegExp;
import org.apache.hadoop.hive.ql.metadata.DummyPartition;
import org.apache.hadoop.hive.ql.metadata.Hive;
import org.apache.hadoop.hive.ql.metadata.HiveException;
import org.apache.hadoop.hive.ql.metadata.HiveUtils;
import org.apache.hadoop.hive.ql.metadata.InvalidTableException;
import org.apache.hadoop.hive.ql.metadata.Partition;
import org.apache.hadoop.hive.ql.metadata.Table;
import org.apache.hadoop.hive.ql.metadata.VirtualColumn;
import org.apache.hadoop.hive.ql.optimizer.GenMRFileSink1;
import org.apache.hadoop.hive.ql.optimizer.GenMROperator;
import org.apache.hadoop.hive.ql.optimizer.GenMRProcContext;
import org.apache.hadoop.hive.ql.optimizer.GenMRProcContext.GenMapRedCtx;
import org.apache.hadoop.hive.ql.optimizer.GenMRRedSink1;
import org.apache.hadoop.hive.ql.optimizer.GenMRRedSink2;
import org.apache.hadoop.hive.ql.optimizer.GenMRRedSink3;
import org.apache.hadoop.hive.ql.optimizer.GenMRRedSink4;
import org.apache.hadoop.hive.ql.optimizer.GenMRTableScan1;
import org.apache.hadoop.hive.ql.optimizer.GenMRUnion1;
import org.apache.hadoop.hive.ql.optimizer.GenMapRedUtils;
import org.apache.hadoop.hive.ql.optimizer.MapJoinFactory;
import org.apache.hadoop.hive.ql.optimizer.Optimizer;
import org.apache.hadoop.hive.ql.optimizer.physical.PhysicalContext;
import org.apache.hadoop.hive.ql.optimizer.physical.PhysicalOptimizer;
import org.apache.hadoop.hive.ql.optimizer.ppr.PartitionPruner;
import org.apache.hadoop.hive.ql.optimizer.unionproc.UnionProcContext;
import org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.tableSpec.SpecType;
import org.apache.hadoop.hive.ql.plan.AggregationDesc;
import org.apache.hadoop.hive.ql.plan.CreateTableDesc;
import org.apache.hadoop.hive.ql.plan.CreateTableLikeDesc;
import org.apache.hadoop.hive.ql.plan.CreateViewDesc;
import org.apache.hadoop.hive.ql.plan.DDLWork;
import org.apache.hadoop.hive.ql.plan.DynamicPartitionCtx;
import org.apache.hadoop.hive.ql.plan.ExprNodeColumnDesc;
import org.apache.hadoop.hive.ql.plan.ExprNodeConstantDesc;
import org.apache.hadoop.hive.ql.plan.ExprNodeDesc;
import org.apache.hadoop.hive.ql.plan.ExprNodeGenericFuncDesc;
import org.apache.hadoop.hive.ql.plan.ExprNodeNullDesc;
import org.apache.hadoop.hive.ql.plan.ExtractDesc;
import org.apache.hadoop.hive.ql.plan.FetchWork;
import org.apache.hadoop.hive.ql.plan.FileSinkDesc;
import org.apache.hadoop.hive.ql.plan.FilterDesc;
import org.apache.hadoop.hive.ql.plan.FilterDesc.sampleDesc;
import org.apache.hadoop.hive.ql.plan.ForwardDesc;
import org.apache.hadoop.hive.ql.plan.GroupByDesc;
import org.apache.hadoop.hive.ql.plan.HiveOperation;
import org.apache.hadoop.hive.ql.plan.JoinCondDesc;
import org.apache.hadoop.hive.ql.plan.JoinDesc;
import org.apache.hadoop.hive.ql.plan.LateralViewForwardDesc;
import org.apache.hadoop.hive.ql.plan.LateralViewJoinDesc;
import org.apache.hadoop.hive.ql.plan.LimitDesc;
import org.apache.hadoop.hive.ql.plan.LoadFileDesc;
import org.apache.hadoop.hive.ql.plan.LoadTableDesc;
import org.apache.hadoop.hive.ql.plan.MapJoinDesc;
import org.apache.hadoop.hive.ql.plan.MapredWork;
import org.apache.hadoop.hive.ql.plan.MoveWork;
import org.apache.hadoop.hive.ql.plan.PartitionDesc;
import org.apache.hadoop.hive.ql.plan.PlanUtils;
import org.apache.hadoop.hive.ql.plan.ReduceSinkDesc;
import org.apache.hadoop.hive.ql.plan.ScriptDesc;
import org.apache.hadoop.hive.ql.plan.SelectDesc;
import org.apache.hadoop.hive.ql.plan.TableDesc;
import org.apache.hadoop.hive.ql.plan.TableScanDesc;
import org.apache.hadoop.hive.ql.plan.UDTFDesc;
import org.apache.hadoop.hive.ql.plan.UnionDesc;
import org.apache.hadoop.hive.ql.session.SessionState;
import org.apache.hadoop.hive.ql.session.SessionState.ResourceType;
import org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator;
import org.apache.hadoop.hive.ql.udf.generic.GenericUDAFEvaluator.Mode;
import org.apache.hadoop.hive.ql.udf.generic.GenericUDFHash;
import org.apache.hadoop.hive.ql.udf.generic.GenericUDTF;
import org.apache.hadoop.hive.serde.Constants;
import org.apache.hadoop.hive.serde2.Deserializer;
import org.apache.hadoop.hive.serde2.MetadataTypedColumnsetSerDe;
import org.apache.hadoop.hive.serde2.SerDeException;
import org.apache.hadoop.hive.serde2.SerDeUtils;
import org.apache.hadoop.hive.serde2.lazy.LazySimpleSerDe;
import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector.Category;
import org.apache.hadoop.hive.serde2.objectinspector.StructField;
import org.apache.hadoop.hive.serde2.objectinspector.StructObjectInspector;
import org.apache.hadoop.hive.serde2.typeinfo.TypeInfo;
import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoFactory;
import org.apache.hadoop.hive.serde2.typeinfo.TypeInfoUtils;
import org.apache.hadoop.mapred.InputFormat;
/**
* Implementation of the semantic analyzer.
*/
public class SemanticAnalyzer extends BaseSemanticAnalyzer {
private HashMap<TableScanOperator, ExprNodeDesc> opToPartPruner;
private HashMap<TableScanOperator, PrunedPartitionList> opToPartList;
private HashMap<String, Operator<? extends Serializable>> topOps;
private HashMap<String, Operator<? extends Serializable>> topSelOps;
private LinkedHashMap<Operator<? extends Serializable>, OpParseContext> opParseCtx;
private List<LoadTableDesc> loadTableWork;
private List<LoadFileDesc> loadFileWork;
private Map<JoinOperator, QBJoinTree> joinContext;
private final HashMap<TableScanOperator, Table> topToTable;
private QB qb;
private ASTNode ast;
private int destTableId;
private UnionProcContext uCtx;
List<AbstractMapJoinOperator<? extends MapJoinDesc>> listMapJoinOpsNoReducer;
private HashMap<TableScanOperator, sampleDesc> opToSamplePruner;
/**
* a map for the split sampling, from ailias to an instance of SplitSample
* that describes percentage and number.
*/
private final HashMap<String, SplitSample> nameToSplitSample;
Map<GroupByOperator, Set<String>> groupOpToInputTables;
Map<String, PrunedPartitionList> prunedPartitions;
private List<FieldSchema> resultSchema;
private CreateViewDesc createVwDesc;
private ArrayList<String> viewsExpanded;
private ASTNode viewSelect;
private final UnparseTranslator unparseTranslator;
private final GlobalLimitCtx globalLimitCtx = new GlobalLimitCtx();
public static class GlobalLimitCtx {
private boolean enable = false;
private int globalLimit = -1;
private boolean hasTransformOrUDTF = false;
private LimitDesc lastReduceLimitDesc = null;
public int getGlobalLimit() {
return globalLimit;
}
public boolean ifHasTransformOrUDTF() {
return hasTransformOrUDTF;
}
public void setHasTransformOrUDTF(boolean hasTransformOrUDTF) {
this.hasTransformOrUDTF = hasTransformOrUDTF;
}
public LimitDesc getLastReduceLimitDesc() {
return lastReduceLimitDesc;
}
public void setLastReduceLimitDesc(LimitDesc lastReduceLimitDesc) {
this.lastReduceLimitDesc = lastReduceLimitDesc;
}
public boolean isEnable() {
return enable;
}
public void enableOpt(int globalLimit) {
this.enable = true;
this.globalLimit = globalLimit;
}
public void disableOpt() {
this.enable = false;
this.globalLimit = -1;
this.lastReduceLimitDesc = null;
}
}
private static class Phase1Ctx {
String dest;
int nextNum;
}
public SemanticAnalyzer(HiveConf conf) throws SemanticException {
super(conf);
opToPartPruner = new HashMap<TableScanOperator, ExprNodeDesc>();
opToPartList = new HashMap<TableScanOperator, PrunedPartitionList>();
opToSamplePruner = new HashMap<TableScanOperator, sampleDesc>();
nameToSplitSample = new HashMap<String, SplitSample>();
topOps = new HashMap<String, Operator<? extends Serializable>>();
topSelOps = new HashMap<String, Operator<? extends Serializable>>();
loadTableWork = new ArrayList<LoadTableDesc>();
loadFileWork = new ArrayList<LoadFileDesc>();
opParseCtx = new LinkedHashMap<Operator<? extends Serializable>, OpParseContext>();
joinContext = new HashMap<JoinOperator, QBJoinTree>();
topToTable = new HashMap<TableScanOperator, Table>();
destTableId = 1;
uCtx = null;
listMapJoinOpsNoReducer = new ArrayList<AbstractMapJoinOperator<? extends MapJoinDesc>>();
groupOpToInputTables = new HashMap<GroupByOperator, Set<String>>();
prunedPartitions = new HashMap<String, PrunedPartitionList>();
unparseTranslator = new UnparseTranslator();
}
@Override
protected void reset() {
super.reset();
loadTableWork.clear();
loadFileWork.clear();
topOps.clear();
topSelOps.clear();
destTableId = 1;
idToTableNameMap.clear();
qb = null;
ast = null;
uCtx = null;
joinContext.clear();
opParseCtx.clear();
groupOpToInputTables.clear();
prunedPartitions.clear();
}
public void init(ParseContext pctx) {
opToPartPruner = pctx.getOpToPartPruner();
opToPartList = pctx.getOpToPartList();
opToSamplePruner = pctx.getOpToSamplePruner();
topOps = pctx.getTopOps();
topSelOps = pctx.getTopSelOps();
opParseCtx = pctx.getOpParseCtx();
loadTableWork = pctx.getLoadTableWork();
loadFileWork = pctx.getLoadFileWork();
joinContext = pctx.getJoinContext();
ctx = pctx.getContext();
destTableId = pctx.getDestTableId();
idToTableNameMap = pctx.getIdToTableNameMap();
uCtx = pctx.getUCtx();
listMapJoinOpsNoReducer = pctx.getListMapJoinOpsNoReducer();
qb = pctx.getQB();
groupOpToInputTables = pctx.getGroupOpToInputTables();
prunedPartitions = pctx.getPrunedPartitions();
setLineageInfo(pctx.getLineageInfo());
}
public ParseContext getParseContext() {
return new ParseContext(conf, qb, ast, opToPartPruner, opToPartList, topOps,
topSelOps, opParseCtx, joinContext, topToTable, loadTableWork,
loadFileWork, ctx, idToTableNameMap, destTableId, uCtx,
listMapJoinOpsNoReducer, groupOpToInputTables, prunedPartitions,
opToSamplePruner, globalLimitCtx, nameToSplitSample, inputs, rootTasks);
}
@SuppressWarnings("nls")
public void doPhase1QBExpr(ASTNode ast, QBExpr qbexpr, String id, String alias)
throws SemanticException {
assert (ast.getToken() != null);
switch (ast.getToken().getType()) {
case HiveParser.TOK_QUERY: {
QB qb = new QB(id, alias, true);
doPhase1(ast, qb, initPhase1Ctx());
qbexpr.setOpcode(QBExpr.Opcode.NULLOP);
qbexpr.setQB(qb);
}
break;
case HiveParser.TOK_UNION: {
qbexpr.setOpcode(QBExpr.Opcode.UNION);
// query 1
assert (ast.getChild(0) != null);
QBExpr qbexpr1 = new QBExpr(alias + "-subquery1");
doPhase1QBExpr((ASTNode) ast.getChild(0), qbexpr1, id + "-subquery1",
alias + "-subquery1");
qbexpr.setQBExpr1(qbexpr1);
// query 2
assert (ast.getChild(0) != null);
QBExpr qbexpr2 = new QBExpr(alias + "-subquery2");
doPhase1QBExpr((ASTNode) ast.getChild(1), qbexpr2, id + "-subquery2",
alias + "-subquery2");
qbexpr.setQBExpr2(qbexpr2);
}
break;
}
}
private LinkedHashMap<String, ASTNode> doPhase1GetAggregationsFromSelect(
ASTNode selExpr) {
// Iterate over the selects search for aggregation Trees.
// Use String as keys to eliminate duplicate trees.
LinkedHashMap<String, ASTNode> aggregationTrees = new LinkedHashMap<String, ASTNode>();
for (int i = 0; i < selExpr.getChildCount(); ++i) {
ASTNode sel = (ASTNode) selExpr.getChild(i).getChild(0);
doPhase1GetAllAggregations(sel, aggregationTrees);
}
return aggregationTrees;
}
private void doPhase1GetColumnAliasesFromSelect(
ASTNode selectExpr, QBParseInfo qbp) {
for (int i = 0; i < selectExpr.getChildCount(); ++i) {
ASTNode selExpr = (ASTNode) selectExpr.getChild(i);
if ((selExpr.getToken().getType() == HiveParser.TOK_SELEXPR) && (selExpr.getChildCount() == 2)) {
String columnAlias = unescapeIdentifier(selExpr.getChild(1).getText());
qbp.setExprToColumnAlias((ASTNode) selExpr.getChild(0), columnAlias);
}
}
}
/**
* DFS-scan the expressionTree to find all aggregation subtrees and put them
* in aggregations.
*
* @param expressionTree
* @param aggregations
* the key to the HashTable is the toStringTree() representation of
* the aggregation subtree.
*/
private void doPhase1GetAllAggregations(ASTNode expressionTree,
HashMap<String, ASTNode> aggregations) {
int exprTokenType = expressionTree.getToken().getType();
if (exprTokenType == HiveParser.TOK_FUNCTION
|| exprTokenType == HiveParser.TOK_FUNCTIONDI
|| exprTokenType == HiveParser.TOK_FUNCTIONSTAR) {
assert (expressionTree.getChildCount() != 0);
if (expressionTree.getChild(0).getType() == HiveParser.Identifier) {
String functionName = unescapeIdentifier(expressionTree.getChild(0)
.getText());
if (FunctionRegistry.getGenericUDAFResolver(functionName) != null) {
aggregations.put(expressionTree.toStringTree(), expressionTree);
FunctionInfo fi = FunctionRegistry.getFunctionInfo(functionName);
if (!fi.isNative()) {
unparseTranslator.addIdentifierTranslation((ASTNode) expressionTree
.getChild(0));
}
return;
}
}
}
for (int i = 0; i < expressionTree.getChildCount(); i++) {
doPhase1GetAllAggregations((ASTNode) expressionTree.getChild(i),
aggregations);
}
}
private List<ASTNode> doPhase1GetDistinctFuncExprs(
HashMap<String, ASTNode> aggregationTrees) throws SemanticException {
List<ASTNode> exprs = new ArrayList<ASTNode>();
for (Map.Entry<String, ASTNode> entry : aggregationTrees.entrySet()) {
ASTNode value = entry.getValue();
assert (value != null);
if (value.getToken().getType() == HiveParser.TOK_FUNCTIONDI) {
exprs.add(value);
}
}
return exprs;
}
public static String generateErrorMessage(ASTNode ast, String message) {
StringBuilder sb = new StringBuilder();
sb.append(ast.getLine());
sb.append(":");
sb.append(ast.getCharPositionInLine());
sb.append(" ");
sb.append(message);
sb.append(". Error encountered near token '");
sb.append(ErrorMsg.getText(ast));
sb.append("'");
return sb.toString();
}
/**
* Goes though the tabref tree and finds the alias for the table. Once found,
* it records the table name-> alias association in aliasToTabs. It also makes
* an association from the alias to the table AST in parse info.
*
* @return the alias of the table
*/
private String processTable(QB qb, ASTNode tabref) throws SemanticException {
// For each table reference get the table name
// and the alias (if alias is not present, the table name
// is used as an alias)
boolean tableSamplePresent = false;
boolean splitSamplePresent = false;
int aliasIndex = 0;
if (tabref.getChildCount() == 2) {
// tablename tablesample
// OR
// tablename alias
ASTNode ct = (ASTNode) tabref.getChild(1);
if (ct.getToken().getType() == HiveParser.TOK_TABLEBUCKETSAMPLE) {
tableSamplePresent = true;
} else if (ct.getToken().getType() == HiveParser.TOK_TABLESPLITSAMPLE) {
splitSamplePresent = true;
} else {
aliasIndex = 1;
}
} else if (tabref.getChildCount() == 3) {
// table name table sample alias
aliasIndex = 2;
ASTNode ct = (ASTNode) tabref.getChild(1);
if (ct.getToken().getType() == HiveParser.TOK_TABLEBUCKETSAMPLE) {
tableSamplePresent = true;
} else if (ct.getToken().getType() == HiveParser.TOK_TABLESPLITSAMPLE) {
splitSamplePresent = true;
}
}
ASTNode tableTree = (ASTNode) (tabref.getChild(0));
String tabIdName = getUnescapedName(tableTree);
String alias = (aliasIndex != 0) ?
unescapeIdentifier(tabref.getChild(aliasIndex).getText()) : tabIdName;
// If the alias is already there then we have a conflict
if (qb.exists(alias)) {
throw new SemanticException(ErrorMsg.AMBIGUOUS_TABLE_ALIAS.getMsg(tabref
.getChild(aliasIndex)));
}
if (tableSamplePresent) {
ASTNode sampleClause = (ASTNode) tabref.getChild(1);
ArrayList<ASTNode> sampleCols = new ArrayList<ASTNode>();
if (sampleClause.getChildCount() > 2) {
for (int i = 2; i < sampleClause.getChildCount(); i++) {
sampleCols.add((ASTNode) sampleClause.getChild(i));
}
}
// TODO: For now only support sampling on up to two columns
// Need to change it to list of columns
if (sampleCols.size() > 2) {
throw new SemanticException(generateErrorMessage(
(ASTNode) tabref.getChild(0),
ErrorMsg.SAMPLE_RESTRICTION.getMsg()));
}
qb.getParseInfo().setTabSample(
alias,
new TableSample(
unescapeIdentifier(sampleClause.getChild(0).getText()),
unescapeIdentifier(sampleClause.getChild(1).getText()),
sampleCols));
if (unparseTranslator.isEnabled()) {
for (ASTNode sampleCol : sampleCols) {
unparseTranslator.addIdentifierTranslation((ASTNode) sampleCol
.getChild(0));
}
}
} else if (splitSamplePresent) {
// only CombineHiveInputFormat supports this optimize
String inputFormat = HiveConf.getVar(conf, HiveConf.ConfVars.HIVEINPUTFORMAT);
if (!inputFormat.equals(
CombineHiveInputFormat.class.getName())) {
throw new SemanticException(generateErrorMessage((ASTNode) tabref.getChild(1),
"Percentage sampling is not supported in " + inputFormat));
}
ASTNode sampleClause = (ASTNode) tabref.getChild(1);
String alias_id = getAliasId(alias, qb);
String strPercentage = unescapeIdentifier(sampleClause.getChild(0).getText());
Double percent = Double.valueOf(strPercentage).doubleValue();
if (percent < 0 || percent > 100) {
throw new SemanticException(generateErrorMessage(sampleClause,
"Sampling percentage should be between 0 and 100"));
}
nameToSplitSample.put(alias_id, new SplitSample(
percent, conf.getIntVar(ConfVars.HIVESAMPLERANDOMNUM)));
}
// Insert this map into the stats
qb.setTabAlias(alias, tabIdName);
qb.addAlias(alias);
qb.getParseInfo().setSrcForAlias(alias, tableTree);
unparseTranslator.addTableNameTranslation(tableTree);
if (aliasIndex != 0) {
unparseTranslator.addIdentifierTranslation((ASTNode) tabref
.getChild(aliasIndex));
}
return alias;
}
private String processSubQuery(QB qb, ASTNode subq) throws SemanticException {
// This is a subquery and must have an alias
if (subq.getChildCount() != 2) {
throw new SemanticException(ErrorMsg.NO_SUBQUERY_ALIAS.getMsg(subq));
}
ASTNode subqref = (ASTNode) subq.getChild(0);
String alias = unescapeIdentifier(subq.getChild(1).getText());
// Recursively do the first phase of semantic analysis for the subquery
QBExpr qbexpr = new QBExpr(alias);
doPhase1QBExpr(subqref, qbexpr, qb.getId(), alias);
// If the alias is already there then we have a conflict
if (qb.exists(alias)) {
throw new SemanticException(ErrorMsg.AMBIGUOUS_TABLE_ALIAS.getMsg(subq
.getChild(1)));
}
// Insert this map into the stats
qb.setSubqAlias(alias, qbexpr);
qb.addAlias(alias);
unparseTranslator.addIdentifierTranslation((ASTNode) subq.getChild(1));
return alias;
}
private boolean isJoinToken(ASTNode node) {
if ((node.getToken().getType() == HiveParser.TOK_JOIN)
|| (node.getToken().getType() == HiveParser.TOK_LEFTOUTERJOIN)
|| (node.getToken().getType() == HiveParser.TOK_RIGHTOUTERJOIN)
|| (node.getToken().getType() == HiveParser.TOK_FULLOUTERJOIN)
|| (node.getToken().getType() == HiveParser.TOK_LEFTSEMIJOIN)
|| (node.getToken().getType() == HiveParser.TOK_UNIQUEJOIN)) {
return true;
}
return false;
}
/**
* Given the AST with TOK_JOIN as the root, get all the aliases for the tables
* or subqueries in the join.
*
* @param qb
* @param join
* @throws SemanticException
*/
@SuppressWarnings("nls")
private void processJoin(QB qb, ASTNode join) throws SemanticException {
int numChildren = join.getChildCount();
if ((numChildren != 2) && (numChildren != 3)
&& join.getToken().getType() != HiveParser.TOK_UNIQUEJOIN) {
throw new SemanticException(generateErrorMessage(join,
"Join with multiple children"));
}
for (int num = 0; num < numChildren; num++) {
ASTNode child = (ASTNode) join.getChild(num);
if (child.getToken().getType() == HiveParser.TOK_TABREF) {
processTable(qb, child);
} else if (child.getToken().getType() == HiveParser.TOK_SUBQUERY) {
processSubQuery(qb, child);
} else if (child.getToken().getType() == HiveParser.TOK_LATERAL_VIEW) {
// SELECT * FROM src1 LATERAL VIEW udtf() AS myTable JOIN src2 ...
// is not supported. Instead, the lateral view must be in a subquery
// SELECT * FROM (SELECT * FROM src1 LATERAL VIEW udtf() AS myTable) a
// JOIN src2 ...
throw new SemanticException(ErrorMsg.LATERAL_VIEW_WITH_JOIN
.getMsg(join));
} else if (isJoinToken(child)) {
processJoin(qb, child);
}
}
}
/**
* Given the AST with TOK_LATERAL_VIEW as the root, get the alias for the
* table or subquery in the lateral view and also make a mapping from the
* alias to all the lateral view AST's.
*
* @param qb
* @param lateralView
* @return the alias for the table/subquery
* @throws SemanticException
*/
private String processLateralView(QB qb, ASTNode lateralView)
throws SemanticException {
int numChildren = lateralView.getChildCount();
assert (numChildren == 2);
ASTNode next = (ASTNode) lateralView.getChild(1);
String alias = null;
switch (next.getToken().getType()) {
case HiveParser.TOK_TABREF:
alias = processTable(qb, next);
break;
case HiveParser.TOK_SUBQUERY:
alias = processSubQuery(qb, next);
break;
case HiveParser.TOK_LATERAL_VIEW:
alias = processLateralView(qb, next);
break;
default:
throw new SemanticException(ErrorMsg.LATERAL_VIEW_INVALID_CHILD
.getMsg(lateralView));
}
alias = alias.toLowerCase();
qb.getParseInfo().addLateralViewForAlias(alias, lateralView);
qb.addAlias(alias);
return alias;
}
/**
* Phase 1: (including, but not limited to):
*
* 1. Gets all the aliases for all the tables / subqueries and makes the
* appropriate mapping in aliasToTabs, aliasToSubq 2. Gets the location of the
* destination and names the clase "inclause" + i 3. Creates a map from a
* string representation of an aggregation tree to the actual aggregation AST
* 4. Creates a mapping from the clause name to the select expression AST in
* destToSelExpr 5. Creates a mapping from a table alias to the lateral view
* AST's in aliasToLateralViews
*
* @param ast
* @param qb
* @param ctx_1
* @throws SemanticException
*/
@SuppressWarnings({"fallthrough", "nls"})
public void doPhase1(ASTNode ast, QB qb, Phase1Ctx ctx_1)
throws SemanticException {
QBParseInfo qbp = qb.getParseInfo();
boolean skipRecursion = false;
if (ast.getToken() != null) {
skipRecursion = true;
switch (ast.getToken().getType()) {
case HiveParser.TOK_SELECTDI:
qb.countSelDi();
// fall through
case HiveParser.TOK_SELECT:
qb.countSel();
qbp.setSelExprForClause(ctx_1.dest, ast);
if (((ASTNode) ast.getChild(0)).getToken().getType() == HiveParser.TOK_HINTLIST) {
qbp.setHints((ASTNode) ast.getChild(0));
}
LinkedHashMap<String, ASTNode> aggregations = doPhase1GetAggregationsFromSelect(ast);
doPhase1GetColumnAliasesFromSelect(ast, qbp);
qbp.setAggregationExprsForClause(ctx_1.dest, aggregations);
qbp.setDistinctFuncExprsForClause(ctx_1.dest,
doPhase1GetDistinctFuncExprs(aggregations));
break;
case HiveParser.TOK_WHERE:
qbp.setWhrExprForClause(ctx_1.dest, ast);
break;
case HiveParser.TOK_INSERT_INTO:
String tab_name = getUnescapedName((ASTNode)ast.getChild(0).
getChild(0));
qbp.addInsertIntoTable(tab_name);
case HiveParser.TOK_DESTINATION:
ctx_1.dest = "insclause-" + ctx_1.nextNum;
ctx_1.nextNum++;
// is there a insert in the subquery
if (qbp.getIsSubQ()) {
ASTNode ch = (ASTNode) ast.getChild(0);
if ((ch.getToken().getType() != HiveParser.TOK_DIR)
|| (((ASTNode) ch.getChild(0)).getToken().getType() != HiveParser.TOK_TMP_FILE)) {
throw new SemanticException(ErrorMsg.NO_INSERT_INSUBQUERY
.getMsg(ast));
}
}
qbp.setDestForClause(ctx_1.dest, (ASTNode) ast.getChild(0));
break;
case HiveParser.TOK_FROM:
int child_count = ast.getChildCount();
if (child_count != 1) {
throw new SemanticException(generateErrorMessage(ast,
"Multiple Children " + child_count));
}
// Check if this is a subquery / lateral view
ASTNode frm = (ASTNode) ast.getChild(0);
if (frm.getToken().getType() == HiveParser.TOK_TABREF) {
processTable(qb, frm);
} else if (frm.getToken().getType() == HiveParser.TOK_SUBQUERY) {
processSubQuery(qb, frm);
} else if (frm.getToken().getType() == HiveParser.TOK_LATERAL_VIEW) {
processLateralView(qb, frm);
} else if (isJoinToken(frm)) {
processJoin(qb, frm);
qbp.setJoinExpr(frm);
}
break;
case HiveParser.TOK_CLUSTERBY:
// Get the clusterby aliases - these are aliased to the entries in the
// select list
qbp.setClusterByExprForClause(ctx_1.dest, ast);
break;
case HiveParser.TOK_DISTRIBUTEBY:
// Get the distribute by aliases - these are aliased to the entries in
// the
// select list
qbp.setDistributeByExprForClause(ctx_1.dest, ast);
if (qbp.getClusterByForClause(ctx_1.dest) != null) {
throw new SemanticException(generateErrorMessage(ast,
ErrorMsg.CLUSTERBY_DISTRIBUTEBY_CONFLICT.getMsg()));
} else if (qbp.getOrderByForClause(ctx_1.dest) != null) {
throw new SemanticException(generateErrorMessage(ast,
ErrorMsg.ORDERBY_DISTRIBUTEBY_CONFLICT.getMsg()));
}
break;
case HiveParser.TOK_SORTBY:
// Get the sort by aliases - these are aliased to the entries in the
// select list
qbp.setSortByExprForClause(ctx_1.dest, ast);
if (qbp.getClusterByForClause(ctx_1.dest) != null) {
throw new SemanticException(generateErrorMessage(ast,
ErrorMsg.CLUSTERBY_SORTBY_CONFLICT.getMsg()));
} else if (qbp.getOrderByForClause(ctx_1.dest) != null) {
throw new SemanticException(generateErrorMessage(ast,
ErrorMsg.ORDERBY_SORTBY_CONFLICT.getMsg()));
}
break;
case HiveParser.TOK_ORDERBY:
// Get the order by aliases - these are aliased to the entries in the
// select list
qbp.setOrderByExprForClause(ctx_1.dest, ast);
if (qbp.getClusterByForClause(ctx_1.dest) != null) {
throw new SemanticException(generateErrorMessage(ast,
ErrorMsg.CLUSTERBY_ORDERBY_CONFLICT.getMsg()));
}
break;
case HiveParser.TOK_GROUPBY:
// Get the groupby aliases - these are aliased to the entries in the
// select list
if (qbp.getSelForClause(ctx_1.dest).getToken().getType() == HiveParser.TOK_SELECTDI) {
throw new SemanticException(generateErrorMessage(ast,
ErrorMsg.SELECT_DISTINCT_WITH_GROUPBY.getMsg()));
}
qbp.setGroupByExprForClause(ctx_1.dest, ast);
skipRecursion = true;
break;
case HiveParser.TOK_HAVING:
qbp.setHavingExprForClause(ctx_1.dest, ast);
qbp.addAggregationExprsForClause(ctx_1.dest, doPhase1GetAggregationsFromSelect(ast));
break;
case HiveParser.TOK_LIMIT:
qbp.setDestLimit(ctx_1.dest, new Integer(ast.getChild(0).getText()));
break;
case HiveParser.TOK_ANALYZE:
// Case of analyze command
String table_name = getUnescapedName((ASTNode)ast.getChild(0).getChild(0));
qb.setTabAlias(table_name, table_name);
qb.addAlias(table_name);
qb.getParseInfo().setIsAnalyzeCommand(true);
// Allow analyze the whole table and dynamic partitions
HiveConf.setVar(conf, HiveConf.ConfVars.DYNAMICPARTITIONINGMODE, "nonstrict");
HiveConf.setVar(conf, HiveConf.ConfVars.HIVEMAPREDMODE, "nonstrict");
break;
case HiveParser.TOK_UNION:
// currently, we dont support subq1 union subq2 - the user has to
// explicitly say:
// select * from (subq1 union subq2) subqalias
if (!qbp.getIsSubQ()) {
throw new SemanticException(generateErrorMessage(ast,
ErrorMsg.UNION_NOTIN_SUBQ.getMsg()));
}
default:
skipRecursion = false;
break;
}
}
if (!skipRecursion) {
// Iterate over the rest of the children
int child_count = ast.getChildCount();
for (int child_pos = 0; child_pos < child_count; ++child_pos) {
// Recurse
doPhase1((ASTNode) ast.getChild(child_pos), qb, ctx_1);
}
}
}
private void getMetaData(QBExpr qbexpr) throws SemanticException {
if (qbexpr.getOpcode() == QBExpr.Opcode.NULLOP) {
getMetaData(qbexpr.getQB());
} else {
getMetaData(qbexpr.getQBExpr1());
getMetaData(qbexpr.getQBExpr2());
}
}
@SuppressWarnings("nls")
public void getMetaData(QB qb) throws SemanticException {
try {
LOG.info("Get metadata for source tables");
// Go over the tables and populate the related structures.
// We have to materialize the table alias list since we might
// modify it in the middle for view rewrite.
List<String> tabAliases = new ArrayList<String>(qb.getTabAliases());
Map<String, String> aliasToViewName = new HashMap<String, String>();
for (String alias : tabAliases) {
String tab_name = qb.getTabNameForAlias(alias);
Table tab = null;
try {
tab = db.getTable(tab_name);
} catch (InvalidTableException ite) {
throw new SemanticException(ErrorMsg.INVALID_TABLE.getMsg(qb
.getParseInfo().getSrcForAlias(alias)));
}
// Disallow INSERT INTO on bucketized tables
if(qb.getParseInfo().isInsertIntoTable(tab_name) &&
tab.getNumBuckets() > 0) {
throw new SemanticException(ErrorMsg.INSERT_INTO_BUCKETIZED_TABLE.
getMsg("Table: " + tab_name));
}
// We check offline of the table, as if people only select from an
// non-existing partition of an offline table, the partition won't
// be added to inputs and validate() won't have the information to
// check the table's offline status.
// TODO: Modify the code to remove the checking here and consolidate
// it in validate()
//
if (tab.isOffline()) {
throw new SemanticException(ErrorMsg.OFFLINE_TABLE_OR_PARTITION.
getMsg("Table " + getUnescapedName(qb.getParseInfo().getSrcForAlias(alias))));
}
if (tab.isView()) {
// TODO: add support to referencing views in foreign databases.
if (!tab.getDbName().equals(db.getCurrentDatabase())) {
throw new SemanticException(ErrorMsg.INVALID_TABLE_ALIAS.
getMsg("Referencing view from foreign databases is not supported."));
}
if (qb.getParseInfo().isAnalyzeCommand()) {
throw new SemanticException(ErrorMsg.ANALYZE_VIEW.getMsg());
}
String fullViewName = tab.getDbName()+"."+tab.getTableName();
// Prevent view cycles
if(viewsExpanded.contains(fullViewName)){
throw new SemanticException("Recursive view " + fullViewName +
" detected (cycle: " + StringUtils.join(viewsExpanded, " -> ") +
" -> " + fullViewName + ").");
}
replaceViewReferenceWithDefinition(qb, tab, tab_name, alias);
aliasToViewName.put(alias, fullViewName);
continue;
}
if (!InputFormat.class.isAssignableFrom(tab.getInputFormatClass())) {
throw new SemanticException(generateErrorMessage(
qb.getParseInfo().getSrcForAlias(alias),
ErrorMsg.INVALID_INPUT_FORMAT_TYPE.getMsg()));
}
qb.getMetaData().setSrcForAlias(alias, tab);
if (qb.getParseInfo().isAnalyzeCommand()) {
tableSpec ts = new tableSpec(db, conf, (ASTNode) ast.getChild(0));
if (ts.specType == SpecType.DYNAMIC_PARTITION) { // dynamic partitions
try {
ts.partitions = db.getPartitionsByNames(ts.tableHandle, ts.partSpec);
} catch (HiveException e) {
throw new SemanticException(generateErrorMessage(qb.getParseInfo().getSrcForAlias(alias),
"Cannot get partitions for " + ts.partSpec), e);
}
}
qb.getParseInfo().addTableSpec(alias, ts);
}
}
LOG.info("Get metadata for subqueries");
// Go over the subqueries and getMetaData for these
for (String alias : qb.getSubqAliases()) {
boolean wasView = aliasToViewName.containsKey(alias);
if (wasView) {
viewsExpanded.add(aliasToViewName.get(alias));
}
QBExpr qbexpr = qb.getSubqForAlias(alias);
getMetaData(qbexpr);
if (wasView) {
viewsExpanded.remove(viewsExpanded.size()-1);
}
}
LOG.info("Get metadata for destination tables");
// Go over all the destination structures and populate the related
// metadata
QBParseInfo qbp = qb.getParseInfo();
for (String name : qbp.getClauseNamesForDest()) {
ASTNode ast = qbp.getDestForClause(name);
switch (ast.getToken().getType()) {
case HiveParser.TOK_TAB: {
tableSpec ts = new tableSpec(db, conf, ast);
if (ts.tableHandle.isView()) {
throw new SemanticException(ErrorMsg.DML_AGAINST_VIEW.getMsg());
}
Class<?> outputFormatClass = ts.tableHandle.getOutputFormatClass();
if (!HiveOutputFormat.class.isAssignableFrom(outputFormatClass)) {
throw new SemanticException(ErrorMsg.INVALID_OUTPUT_FORMAT_TYPE
.getMsg(ast, "The class is " + outputFormatClass.toString()));
}
// tableSpec ts is got from the query (user specified),
// which means the user didn't specify partitions in their query,
// but whether the table itself is partitioned is not know.
if (ts.specType != SpecType.STATIC_PARTITION) {
// This is a table or dynamic partition
qb.getMetaData().setDestForAlias(name, ts.tableHandle);
// has dynamic as well as static partitions
if (ts.partSpec != null && ts.partSpec.size() > 0) {
qb.getMetaData().setPartSpecForAlias(name, ts.partSpec);
}
} else {
// This is a partition
qb.getMetaData().setDestForAlias(name, ts.partHandle);
}
if (HiveConf.getBoolVar(conf, HiveConf.ConfVars.HIVESTATSAUTOGATHER)) {
// Set that variable to automatically collect stats during the MapReduce job
qb.getParseInfo().setIsInsertToTable(true);