summaryrefslogtreecommitdiff
path: root/framework/Testing/Data/ActiveRecord/TActiveFinder.php
blob: d1c35bdf31df50625c454b11c2df50517fa5660a (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
<?php
/**
 * CActiveRecord class file.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @link http://www.yiiframework.com/
 * @copyright Copyright &copy; 2008-2009 Yii Software LLC
 * @license http://www.yiiframework.com/license/CBaseActiveRelation*/

/**
 * CActiveFinder implements eager loading and lazy loading of related active records.
 *
 * When used in eager loading, this class provides the same set of find methods as
 * {@link CActiveRecord}.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @version $Id: CActiveFinder.php 1127 2009-06-13 20:26:35Z qiang.xue $
 * @package System.Testing.Data.ActiveRecord
 * @since 1.0
 */
class TActiveFinder extends TComponent
{
	/**
	 * @var boolean join all tables all at once. Defaults to false.
	 * This property is internally used.
	 * @since 1.0.2
	 */
	public $joinAll=false;
	/**
	 * @var boolean whether the base model has limit or offset.
	 * This property is internally used.
	 * @since 1.0.2
	 */
	public $baseLimited=false;

	private $_joinCount=0;
	private $_joinTree;
	private $_builder;
	private $_criteria;  // the criteria generated via named scope

	/**
	 * Constructor.
	 * A join tree is built up based on the declared relationships between active record classes.
	 * @param CActiveRecord the model that initiates the active finding process
	 * @param mixed the relation names to be actively looked for
	 * @param CDbCriteria the criteria associated with the named scopes (since version 1.0.5)
	 */
	public function __construct($model,$with,$criteria=null)
	{
		$this->_criteria=$criteria;
		$this->_builder=$model->getCommandBuilder();
		$this->_joinTree=new TJoinElement($this,$model);
		$this->buildJoinTree($this->_joinTree,$with);
	}

	/**
	 * Uses the most aggressive join approach.
	 * By calling this method, even if there is LIMIT/OFFSET option set for
	 * the primary table query, we will still use a single SQL statement.
	 * By default (without calling this method), the primary table will be queried
	 * by itself so that LIMIT/OFFSET can be correctly applied.
	 * @return CActiveFinder the finder object
	 * @since 1.0.2
	 */
	public function together()
	{
		$this->joinAll=true;
		return $this;
	}

	private function query($criteria,$all=false)
	{
		if($this->_criteria!==null)
		{
			$this->_criteria->mergeWith($criteria);
			$criteria=$this->_criteria;
		}

		$this->_joinTree->find($criteria);
		$this->_joinTree->afterFind();

		if($all)
			return array_values($this->_joinTree->records);
		else if(count($this->_joinTree->records))
			return reset($this->_joinTree->records);
		else
			return null;
	}

	/**
	 * This is the relational version of {@link CActiveRecord::find()}.
	 */
	public function find($condition='',$params=array())
	{
		Prado::trace(get_class($this->_joinTree->model).'.find() eagerly','System.Testing.Data.ActiveRecord.TActiveRecord');
		$criteria=$this->_builder->createCriteria($condition,$params);
		return $this->query($criteria);
	}

	/**
	 * This is the relational version of {@link CActiveRecord::findAll()}.
	 */
	public function findAll($condition='',$params=array())
	{
		Prado::trace(get_class($this->_joinTree->model).'.findAll() eagerly','System.Testing.Data.ActiveRecord.TActiveRecord');
		$criteria=$this->_builder->createCriteria($condition,$params);
		return $this->query($criteria,true);
	}

	/**
	 * This is the relational version of {@link CActiveRecord::findByPk()}.
	 */
	public function findByPk($pk,$condition='',$params=array())
	{
		Prado::trace(get_class($this->_joinTree->model).'.findByPk() eagerly','System.Testing.Data.ActiveRecord.TActiveRecord');
		$criteria=$this->_builder->createPkCriteria($this->_joinTree->model->getTableSchema(),$pk,$condition,$params);
		return $this->query($criteria);
	}

	/**
	 * This is the relational version of {@link CActiveRecord::findAllByPk()}.
	 */
	public function findAllByPk($pk,$condition='',$params=array())
	{
		Prado::trace(get_class($this->_joinTree->model).'.findAllByPk() eagerly','System.Testing.Data.ActiveRecord.TActiveRecord');
		$criteria=$this->_builder->createPkCriteria($this->_joinTree->model->getTableSchema(),$pk,$condition,$params);
		return $this->query($criteria,true);
	}

	/**
	 * This is  the relational version of {@link CActiveRecord::findByAttributes()}.
	 */
	public function findByAttributes($attributes,$condition='',$params=array())
	{
		Prado::trace(get_class($this->_joinTree->model).'.findByAttributes() eagerly','System.Testing.Data.ActiveRecord.TActiveRecord');
		$criteria=$this->_builder->createColumnCriteria($this->_joinTree->model->getTableSchema(),$attributes,$condition,$params);
		return $this->query($criteria);
	}

	/**
	 * This is the relational version of {@link CActiveRecord::findAllByAttributes()}.
	 */
	public function findAllByAttributes($attributes,$condition='',$params=array())
	{
		Prado::trace(get_class($this->_joinTree->model).'.findAllByAttributes() eagerly','System.Testing.Data.ActiveRecord.TActiveRecord');
		$criteria=$this->_builder->createColumnCriteria($this->_joinTree->model->getTableSchema(),$attributes,$condition,$params);
		return $this->query($criteria,true);
	}

	/**
	 * This is the relational version of {@link CActiveRecord::findBySql()}.
	 */
	public function findBySql($sql,$params=array())
	{
		Prado::trace(get_class($this->_joinTree->model).'.findBySql() eagerly','System.Testing.Data.ActiveRecord.TActiveRecord');
		if(($row=$this->_builder->createSqlCommand($sql,$params)->queryRow())!==false)
		{
			$baseRecord=$this->_joinTree->model->populateRecord($row,false);
			$this->_joinTree->findWithBase($baseRecord);
			$this->_joinTree->afterFind();
			return $baseRecord;
		}
	}

	/**
	 * This is the relational version of {@link CActiveRecord::findAllBySql()}.
	 */
	public function findAllBySql($sql,$params=array())
	{
		Prado::trace(get_class($this->_joinTree->model).'.findAllBySql() eagerly','System.Testing.Data.ActiveRecord.TActiveRecord');
		if(($rows=$this->_builder->createSqlCommand($sql,$params)->queryAll())!==array())
		{
			$baseRecords=$this->_joinTree->model->populateRecords($rows,false);
			$this->_joinTree->findWithBase($baseRecords);
			$this->_joinTree->afterFind();
			return $baseRecords;
		}
		else
			return array();
	}

	/**
	 * This is the relational version of {@link CActiveRecord::count()}.
	 * @since 1.0.3
	 */
	public function count($condition='',$params=array())
	{
		Prado::trace(get_class($this->_joinTree->model).'.count() eagerly','System.Testing.Data.ActiveRecord.TActiveRecord');
		$criteria=$this->_builder->createCriteria($condition,$params);
		if($this->_criteria!==null)
		{
			$this->_criteria->mergeWith($criteria);
			$criteria=$this->_criteria;
		}
		return $this->_joinTree->count($criteria);
	}

	/**
	 * Finds the related objects for the specified active record.
	 * This method is internally invoked by {@link CActiveRecord} to support lazy loading.
	 * @param CActiveRecord the base record whose related objects are to be loaded
	 */
	public function lazyFind($baseRecord)
	{
		$this->_joinTree->lazyFind($baseRecord);
		if(!empty($this->_joinTree->children))
		{
			$child=reset($this->_joinTree->children);
			$child->afterFind();
		}
	}

	/**
	 * Builds up the join tree representing the relationships involved in this query.
	 * @param CJoinElement the parent tree node
	 * @param mixed the names of the related objects relative to the parent tree node
	 * @param array additional query options to be merged with the relation
	 */
	private function buildJoinTree($parent,$with,$options=null)
	{
		if($parent instanceof CStatElement)
			throw new TDbException('The STAT relation "'.($parent->relation->name).'" cannot have child relations.');

		if(is_string($with))
		{
			if(($pos=strrpos($with,'.'))!==false)
			{
				$parent=$this->buildJoinTree($parent,substr($with,0,$pos));
				$with=substr($with,$pos+1);
			}

			// named scope
			if(($pos=strpos($with,':'))!==false)
			{
				$scopes=explode(':',substr($with,$pos+1));
				$with=substr($with,0,$pos);
			}

			if(isset($parent->children[$with]))
				return $parent->children[$with];

			if(($relation=$parent->model->getActiveRelation($with))===null)
				throw new TDbException('Relation "'.$with.'" is not defined in active record class "'.get_class($parent->model).'".');

			$relation=clone $relation;
			$model=TActiveRecord::model($relation->className);
			if(($scope=$model->defaultScope())!==array())
				$relation->mergeWith($scope);
			if(isset($scopes) && !empty($scopes))
			{
				$scs=$model->scopes();
				foreach($scopes as $scope)
				{
					if(isset($scs[$scope]))
						$relation->mergeWith($scs[$scope]);
					else
						throw new TDbException('Active record class "'.get_class($model).'" does not have a scope named "'.$scope.'".');
				}
			}

			// dynamic options
			if($options!==null)
				$relation->mergeWith($options);

			if($relation instanceof TStatRelation)
				return new TStatElement($this,$relation,$parent);
			else
			{
				$element=$parent->children[$with]=new TJoinElement($this,$relation,$parent,++$this->_joinCount);
				if(!empty($relation->with))
					$this->buildJoinTree($element,$relation->with);
				return $element;
			}
		}

		// $with is an array, keys are relation name, values are relation spec
		foreach($with as $key=>$value)
		{
			if(is_string($value))  // the value is a relation name
				$this->buildJoinTree($parent,$value);
			else if(is_string($key) && is_array($value))
				$element=$this->buildJoinTree($parent,$key,$value);
		}
	}
}


/**
 * CJoinElement represents a tree node in the join tree created by {@link CActiveFinder}.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @version $Id: CActiveFinder.php 1127 2009-06-13 20:26:35Z qiang.xue $
 * @package System.Testing.Data.ActiveRecord
 * @since 1.0
 */
class TJoinElement
{
	/**
	 * @var integer the unique ID of this tree node
	 */
	public $id;
	/**
	 * @var CActiveRelation the relation represented by this tree node
	 */
	public $relation;
	/**
	 * @var CActiveRecord the model associated with this tree node
	 */
	public $model;
	/**
	 * @var array list of active records found by the queries. They are indexed by primary key values.
	 */
	public $records=array();
	/**
	 * @var array list of child join elements
	 */
	public $children=array();
	/**
	 * @var array list of stat elements
	 * @since 1.0.4
	 */
	public $stats=array();
	/**
	 * @var string table alias for this join element
	 */
	public $tableAlias;

	private $_finder;
	private $_builder;
	private $_parent;
	private $_pkAlias;  				// string or name=>alias
	private $_columnAliases=array();	// name=>alias
	private $_joined=false;
	private $_table;
	private $_related=array();			// PK, relation name, related PK => true

	/**
	 * Constructor.
	 * @param CActiveFinder the finder
	 * @param mixed the relation (if the third parameter is not null)
	 * or the model (if the third parameter is null) associated with this tree node.
	 * @param CJoinElement the parent tree node
	 * @param integer the ID of this tree node that is unique among all the tree nodes
	 */
	public function __construct($finder,$relation,$parent=null,$id=0)
	{
		$this->_finder=$finder;
		$this->id=$id;
		if($parent!==null)
		{
			$this->relation=$relation;
			$this->_parent=$parent;
			$this->_builder=$parent->_builder;
			$this->tableAlias=$relation->alias===null?$relation->name:$relation->alias;
			$this->model=TActiveRecord::model($relation->className);
			$this->_table=$this->model->getTableSchema();
		}
		else  // root element, the first parameter is the model.
		{
			$this->model=$relation;
			$this->_builder=$relation->getCommandBuilder();
			$this->_table=$relation->getTableSchema();
		}

		// set up column aliases, such as t1_c2
		$table=$this->_table;
		$prefix='t'.$id.'_c';
		foreach($table->getColumnNames() as $key=>$name)
		{
			$alias=$prefix.$key;
			$this->_columnAliases[$name]=$alias;
			if($table->primaryKey===$name)
				$this->_pkAlias=$alias;
			else if(is_array($table->primaryKey) && in_array($name,$table->primaryKey))
				$this->_pkAlias[$name]=$alias;
		}
	}

	/**
	 * Performs the recursive finding with the criteria.
	 * @param CDbCriteria the query criteria
	 */
	public function find($criteria=null)
	{
		if($this->_parent===null) // root element
		{
			$query=new TJoinQuery($this,$criteria);
			$this->_finder->baseLimited=($criteria->offset>=0 || $criteria->limit>=0);
			$this->buildQuery($query);
			$this->_finder->baseLimited=false;
			$this->runQuery($query);
		}
		else if(!$this->_joined && !empty($this->_parent->records)) // not joined before
		{
			$query=new TJoinQuery($this->_parent);
			$this->_joined=true;
			$query->join($this);
			$this->buildQuery($query);
			$this->_parent->runQuery($query);
		}

		foreach($this->children as $child) // find recursively
			$child->find();

		foreach($this->stats as $stat)
			$stat->query();
	}

	/**
	 * Performs lazy find with the specified base record.
	 * @param CActiveRecord the active record whose related object is to be fetched.
	 */
	public function lazyFind($baseRecord)
	{
		if(is_string($this->_table->primaryKey))
			$this->records[$baseRecord->{$this->_table->primaryKey}]=$baseRecord;
		else
		{
			$pk=array();
			foreach($this->_table->primaryKey as $name)
				$pk[$name]=$baseRecord->$name;
			$this->records[serialize($pk)]=$baseRecord;
		}

		foreach($this->stats as $stat)
			$stat->query();

		if(empty($this->children))
			return;

		$child=reset($this->children);
		$query=new TJoinQuery($this);
		$this->_joined=true;
		$child->_joined=true;
		$query->join($child);
		if($child->relation instanceof THasManyRelation)
		{
			$query->limit=$child->relation->limit;
			$query->offset=$child->relation->offset;
			$this->_finder->baseLimited=($query->offset>=0 || $query->limit>=0);
			$query->groups[]=$child->relation->group;
			$query->havings[]=$child->relation->having;
		}
		$child->buildQuery($query);
		$this->_finder->baseLimited=false;
		$this->runQuery($query);
		foreach($child->children as $c)
			$c->find();
	}

	/**
	 * Performs the eager loading with the base records ready.
	 * @param mixed the available base record(s).
	 */
	public function findWithBase($baseRecords)
	{
		if(!is_array($baseRecords))
			$baseRecords=array($baseRecords);
		if(is_string($this->_table->primaryKey))
		{
			foreach($baseRecords as $baseRecord)
				$this->records[$baseRecord->{$this->_table->primaryKey}]=$baseRecord;
		}
		else
		{
			foreach($baseRecords as $baseRecord)
			{
				$pk=array();
				foreach($this->_table->primaryKey as $name)
					$pk[$name]=$baseRecord->$name;
				$this->records[serialize($pk)]=$baseRecord;
			}
		}

		$query=new TJoinQuery($this);
		$this->buildQuery($query);
		if(count($query->joins)>1)
			$this->runQuery($query);
		foreach($this->children as $child)
			$child->find();

		foreach($this->stats as $stat)
			$stat->query();
	}

	/**
	 * Count the number of primary records returned by the join statement.
	 * @param CDbCriteria the query criteria
	 * @return integer number of primary records.
	 * @since 1.0.3
	 */
	public function count($criteria=null)
	{
		$query=new TJoinQuery($this,$criteria);
		// ensure only one big join statement is used
		$this->_finder->baseLimited=false;
		$this->_finder->joinAll=true;
		$this->buildQuery($query);

		if(is_string($this->_table->primaryKey))
		{
			$prefix=$this->getColumnPrefix();
			$schema=$this->_builder->getSchema();
			$column=$prefix.$schema->quoteColumnName($this->_table->primaryKey);
		}
		else if($criteria->select!=='*')
			$column=$criteria->select;
		else
			throw new TDbException('Unable to count records with composite primary keys. Please explicitly specify the SELECT option in the query criteria.');

		$query->selects=array("COUNT(DISTINCT $column)");
		$query->orders=$query->groups=$query->havings=array();
		$command=$query->createCommand($this->_builder);
		return $command->queryScalar();
	}

	/**
	 * Calls {@link CActiveRecord::afterFind} of all the records.
	 * @since 1.0.3
	 */
	public function afterFind()
	{
		foreach($this->records as $record)
			$record->afterFindInternal();
		foreach($this->children as $child)
			$child->afterFind();
	}

	/**
	 * Builds the join query with all descendant HAS_ONE and BELONGS_TO nodes.
	 * @param CJoinQuery the query being built up
	 */
	public function buildQuery($query)
	{
		foreach($this->children as $child)
		{
			if($child->relation instanceof THasOneRelation || $child->relation instanceof TBelongsToRelation
				|| $this->_finder->joinAll || !$this->_finder->baseLimited && $child->relation->together)
			{
				$child->_joined=true;
				$query->join($child);
				$child->buildQuery($query);
			}
		}
	}

	/**
	 * Executes the join query and populates the query results.
	 * @param CJoinQuery the query to be executed.
	 */
	public function runQuery($query)
	{
		$command=$query->createCommand($this->_builder);
		foreach($command->queryAll() as $row)
			$this->populateRecord($query,$row);
	}

	/**
	 * Populates the active records with the query data.
	 * @param CJoinQuery the query executed
	 * @param array a row of data
	 * @return CActiveRecord the populated record
	 */
	private function populateRecord($query,$row)
	{
		// determine the primary key value
		if(is_string($this->_pkAlias))  // single key
		{
			if(isset($row[$this->_pkAlias]))
				$pk=$row[$this->_pkAlias];
			else	// no matching related objects
				return null;
		}
		else // is_array, composite key
		{
			$pk=array();
			foreach($this->_pkAlias as $name=>$alias)
			{
				if(isset($row[$alias]))
					$pk[$name]=$row[$alias];
				else	// no matching related objects
					return null;
			}
			$pk=serialize($pk);
		}

		// retrieve or populate the record according to the primary key value
		if(isset($this->records[$pk]))
			$record=$this->records[$pk];
		else
		{
			$attributes=array();
			$aliases=array_flip($this->_columnAliases);
			foreach($row as $alias=>$value)
			{
				if(isset($aliases[$alias]))
					$attributes[$aliases[$alias]]=$value;
			}
			$record=$this->model->populateRecord($attributes,false);
			foreach($this->children as $child)
				$record->addRelatedRecord($child->relation->name,null,$child->relation instanceof THasManyRelation);
			$this->records[$pk]=$record;
		}

		// populate child records recursively
		foreach($this->children as $child)
		{
			if(!isset($query->elements[$child->id]))
				continue;
			$childRecord=$child->populateRecord($query,$row);
			if($child->relation instanceof THasOneRelation || $child->relation instanceof TBelongsToRelation)
				$record->addRelatedRecord($child->relation->name,$childRecord,false);
			else // has_many and many_many
			{
				// need to double check to avoid adding duplicated related objects
				if($childRecord instanceof TActiveRecord)
					$fpk=serialize($childRecord->getPrimaryKey());
				else
					$fpk=0;
				if(!isset($this->_related[$pk][$child->relation->name][$fpk]))
				{
					$record->addRelatedRecord($child->relation->name,$childRecord,true);
					$this->_related[$pk][$child->relation->name][$fpk]=true;
				}
			}
		}

		return $record;
	}

	/**
	 * @return string the table name and the table alias (if any). This can be used directly in SQL query without escaping.
	 */
	public function getTableNameWithAlias()
	{
		if($this->tableAlias!==null)
			return $this->_table->rawName . ' ' . $this->tableAlias;
		else
			return $this->_table->rawName;
	}

	/**
	 * Generates the list of columns to be selected.
	 * Columns will be properly aliased and primary keys will be added to selection if they are not specified.
	 * @param mixed columns to be selected. Defaults to '*', indicating all columns.
	 * @return string the column selection
	 */
	public function getColumnSelect($select='*')
	{
		$schema=$this->_builder->getSchema();
		$prefix=$this->getColumnPrefix();
		$columns=array();
		if($select==='*')
		{
			foreach($this->_table->getColumnNames() as $name)
				$columns[]=$prefix.$schema->quoteColumnName($name).' AS '.$schema->quoteColumnName($this->_columnAliases[$name]);
		}
		else
		{
			if(is_string($select))
				$select=explode(',',$select);
			$selected=array();
			foreach($select as $name)
			{
				$name=trim($name);
				$matches=array();
				if(($pos=strrpos($name,'.'))!==false)
					$key=substr($name,$pos+1);
				else
					$key=$name;
				if(isset($this->_columnAliases[$key]))  // simple column names
				{
					$columns[]=$prefix.$schema->quoteColumnName($key).' AS '.$schema->quoteColumnName($this->_columnAliases[$key]);
					$selected[$this->_columnAliases[$key]]=1;
				}
				else if(preg_match('/^(.*?)\s+AS\s+(\w+)$/i',$name,$matches)) // if the column is already aliased
				{
					$alias=$matches[2];
					if(!isset($this->_columnAliases[$alias]) || $this->_columnAliases[$alias]!==$alias)
					{
						$this->_columnAliases[$alias]=$alias;
						$columns[]=$name;
						$selected[$alias]=1;
					}
				}
				else
					throw new TDbException('Active record "'.get_class($this->model).'" is trying to select an invalid column "'.$name.'". Note, the column must exist in the table or be an expression with alias.');
			}
			// add primary key selection if they are not selected
			if(is_string($this->_pkAlias) && !isset($selected[$this->_pkAlias]))
				$columns[]=$prefix.$schema->quoteColumnName($this->_table->primaryKey).' AS '.$schema->quoteColumnName($this->_pkAlias);
			else if(is_array($this->_pkAlias))
			{
				foreach($this->_table->primaryKey as $name)
					if(!isset($selected[$name]))
						$columns[]=$prefix.$schema->quoteColumnName($name).' AS '.$schema->quoteColumnName($this->_pkAlias[$name]);
			}
		}

		return implode(', ',$columns);
	}

	/**
	 * @return string the primary key selection
	 */
	public function getPrimaryKeySelect()
	{
		$schema=$this->_builder->getSchema();
		$prefix=$this->getColumnPrefix();
		$columns=array();
		if(is_string($this->_pkAlias))
			$columns[]=$prefix.$schema->quoteColumnName($this->_table->primaryKey).' AS '.$schema->quoteColumnName($this->_pkAlias);
		else if(is_array($this->_pkAlias))
		{
			foreach($this->_pkAlias as $name=>$alias)
				$columns[]=$prefix.$schema->quoteColumnName($name).' AS '.$schema->quoteColumnName($alias);
		}
		return implode(', ',$columns);
	}

	/**
	 * @return string the condition that specifies only the rows with the selected primary key values.
	 */
	public function getPrimaryKeyRange()
	{
		if(empty($this->records))
			return '';
		$values=array_keys($this->records);
		if(is_array($this->_table->primaryKey))
		{
			foreach($values as &$value)
				$value=unserialize($value);
		}
		return $this->_builder->createInCondition($this->_table,$this->_table->primaryKey,$values,$this->getColumnPrefix());
	}

	/**
	 * @return string the column prefix for column reference disambiguation
	 */
	public function getColumnPrefix()
	{
		if($this->tableAlias!==null)
			return $this->tableAlias.'.';
		else
			return $this->_table->rawName.'.';
	}

	/**
	 * @return string the join statement (this node joins with its parent)
	 */
	public function getJoinCondition()
	{
		$parent=$this->_parent;
		$relation=$this->relation;
		if($this->relation instanceof TManyManyRelation)
		{
			if(!preg_match('/^\s*(.*?)\((.*)\)\s*$/',$this->relation->foreignKey,$matches))
				throw new TDbException('The relation "'.($this->relation->name).'" in active record class "'.get_class($parent->model).'" is specified with an invalid foreign key. The format of the foreign key must be "joinTable(fk1,fk2,...)".');

			$schema=$this->_builder->getSchema();
			if(($joinTable=$schema->getTable($matches[1]))===null)
				throw new TDbException('The relation "'.($this->relation->name).'" in active record class "'.get_class($parent->model).'" is not specified correctly: the join table "'.($matches[1]).'" given in the foreign key cannot be found in the database.');
				
			$fks=preg_split('/[\s,]+/',$matches[2],-1,PREG_SPLIT_NO_EMPTY);

			return $this->joinManyMany($joinTable,$fks,$parent);
		}
		else
		{
			$fks=preg_split('/[\s,]+/',$relation->foreignKey,-1,PREG_SPLIT_NO_EMPTY);
			if($this->relation instanceof TBelongsToRelation)
			{
				$pke=$this;
				$fke=$parent;
			}
			else
			{
				$pke=$parent;
				$fke=$this;
			}
			return $this->joinOneMany($fke,$fks,$pke,$parent);
		}
	}

	/**
	 * Generates the join statement for one-many relationship.
	 * This works for HAS_ONE, HAS_MANY and BELONGS_TO.
	 * @param CJoinElement the join element containing foreign keys
	 * @param array the foreign keys
	 * @param CJoinElement the join element containg primary keys
	 * @param CJoinElement the parent join element
	 * @return string the join statement
	 * @throws CDbException if a foreign key is invalid
	 */
	private function joinOneMany($fke,$fks,$pke,$parent)
	{
		$schema=$this->_builder->getSchema();
		$joins=array();
		foreach($fks as $i=>$fk)
		{
			if(!isset($fke->_table->columns[$fk]))
				throw new TDbException('The relation "'.($this->relation->name).'" in active record class "'.get_class($parent->model).'" is specified with an invalid foreign key "'.$fk.'". There is no such column in the table "'.($fke->_table->name).'".');

			if(isset($fke->_table->foreignKeys[$fk]))
				$pk=$fke->_table->foreignKeys[$fk][1];
			else  // FK constraints undefined
			{
				if(is_array($pke->_table->primaryKey)) // composite PK
					$pk=$pke->_table->primaryKey[$i];
				else
					$pk=$pke->_table->primaryKey;
			}
			$joins[]=$fke->getColumnPrefix().$schema->quoteColumnName($fk) . '=' . $pke->getColumnPrefix().$schema->quoteColumnName($pk);
		}
		if(!empty($this->relation->on))
			$joins[]=$this->relation->on;
		return $this->relation->joinType . ' ' . $this->getTableNameWithAlias() . ' ON (' . implode(') AND (',$joins).')';
	}

	/**
	 * Generates the join statement for many-many relationship.
	 * @param CDbTableSchema the join table
	 * @param array the foreign keys
	 * @param CJoinElement the parent join element
	 * @return string the join statement
	 * @throws CDbException if a foreign key is invalid
	 */
	private function joinManyMany($joinTable,$fks,$parent)
	{
		$schema=$this->_builder->getSchema();
		$joinAlias=$this->relation->name.'_'.$this->tableAlias;
		$parentCondition=array();
		$childCondition=array();
		foreach($fks as $i=>$fk)
		{
			if(!isset($joinTable->columns[$fk]))
				throw new TDbException('The relation "'.($this->relation->name).'" in active record class "'.get_class($parent->model).'" is specified with an invalid foreign key "'.$fk.'". There is no such column in the table "'.($joinTable->name).'".');

			if(isset($joinTable->foreignKeys[$fk]))
			{
				list($tableName,$pk)=$joinTable->foreignKeys[$fk];
				if(!isset($parentCondition[$pk]) && $schema->compareTableNames($parent->_table->rawName,$tableName))
					$parentCondition[$pk]=$parent->getColumnPrefix().$schema->quoteColumnName($pk).'='.$joinAlias.'.'.$schema->quoteColumnName($fk);
				else if(!isset($childCondition[$pk]) && $schema->compareTableNames($this->_table->rawName,$tableName))
					$childCondition[$pk]=$this->getColumnPrefix().$schema->quoteColumnName($pk).'='.$joinAlias.'.'.$schema->quoteColumnName($fk);
				else
					throw new TDbException('The relation "'.($this->relation->name).'" in active record class "'.get_class($parent->model).'" is specified with an invalid foreign key "'.$fk.'". The foreign key does not point to either joining table.');
			}
			else // FK constraints not defined
			{
				if($i<count($parent->_table->primaryKey))
				{
					$pk=is_array($parent->_table->primaryKey) ? $parent->_table->primaryKey[$i] : $parent->_table->primaryKey;
					$parentCondition[$pk]=$parent->getColumnPrefix().$schema->quoteColumnName($pk).'='.$joinAlias.'.'.$schema->quoteColumnName($fk);
				}
				else
				{
					$j=$i-count($parent->_table->primaryKey);
					$pk=is_array($this->_table->primaryKey) ? $this->_table->primaryKey[$j] : $this->_table->primaryKey;
					$childCondition[$pk]=$this->getColumnPrefix().$schema->quoteColumnName($pk).'='.$joinAlias.'.'.$schema->quoteColumnName($fk);
				}
			}
		}
		if($parentCondition!==array() && $childCondition!==array())
		{
			$join=$this->relation->joinType.' '.$joinTable->rawName.' '.$joinAlias;
			$join.=' ON ('.implode(') AND (',$parentCondition).')';
			$join.=' '.$this->relation->joinType.' '.$this->getTableNameWithAlias();
			$join.=' ON ('.implode(') AND (',$childCondition).')';
			if(!empty($this->relation->on))
				$join.=' AND ('.$this->relation->on.')';
			return $join;
		}
		else
			throw new TDbException('The relation "'.($this->relation->name).'" in active record class "'.get_class($parent->model).'" is specified with an incomplete foreign key. The foreign key must consist of columns referencing both joining tables.');
	}
}


/**
 * CJoinQuery represents a JOIN SQL statement.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @version $Id: CActiveFinder.php 1127 2009-06-13 20:26:35Z qiang.xue $
 * @package System.Testing.Data.ActiveRecord
 * @since 1.0
 */
class TJoinQuery
{
	/**
	 * @var array list of column selections
	 */
	public $selects=array();
	/**
	 * @var array list of join statement
	 */
	public $joins=array();
	/**
	 * @var array list of WHERE clauses
	 */
	public $conditions=array();
	/**
	 * @var array list of ORDER BY clauses
	 */
	public $orders=array();
	/**
	 * @var array list of GROUP BY clauses
	 */
	public $groups=array();
	/**
	 * @var array list of HAVING clauses
	 */
	public $havings=array();
	/**
	 * @var integer row limit
	 */
	public $limit=-1;
	/**
	 * @var integer row offset
	 */
	public $offset=-1;
	/**
	 * @var array list of query parameters
	 */
	public $params=array();
	/**
	 * @var array list of join element IDs (id=>true)
	 */
	public $elements=array();

	/**
	 * Constructor.
	 * @param CJoinElement The root join tree.
	 * @param CDbCriteria the query criteria
	 */
	public function __construct($joinElement,$criteria=null)
	{
		if($criteria!==null)
		{
			$this->selects[]=$joinElement->getColumnSelect($criteria->select);
			$this->joins[]=$joinElement->getTableNameWithAlias();
			$this->joins[]=$criteria->join;
			$this->conditions[]=$criteria->condition;
			$this->orders[]=$criteria->order;
			$this->groups[]=$criteria->group;
			$this->havings[]=$criteria->having;
			$this->limit=$criteria->limit;
			$this->offset=$criteria->offset;
			$this->params=$criteria->params;
		}
		else
		{
			$this->selects[]=$joinElement->getPrimaryKeySelect();
			$this->joins[]=$joinElement->getTableNameWithAlias();
			$this->conditions[]=$joinElement->getPrimaryKeyRange();
		}
		$this->elements[$joinElement->id]=true;
	}

	/**
	 * Joins with another join element
	 * @param CJoinElement the element to be joined
	 */
	public function join($element)
	{
		$this->selects[]=$element->getColumnSelect($element->relation->select);
		$this->conditions[]=$element->relation->condition;
		$this->orders[]=$element->relation->order;
		$this->joins[]=$element->getJoinCondition();
		$this->groups[]=$element->relation->group;
		$this->havings[]=$element->relation->having;

		if(is_array($element->relation->params))
		{
			if(is_array($this->params))
				$this->params=array_merge($this->params,$element->relation->params);
			else
				$this->params=$element->relation->params;
		}
		$this->elements[$element->id]=true;
	}

	/**
	 * Creates the SQL statement.
	 * @param CDbCommandBuilder the command builder
	 * @return string the SQL statement
	 */
	public function createCommand($builder)
	{
		$sql='SELECT ' . implode(', ',$this->selects);
		$sql.=' FROM ' . implode(' ',$this->joins);

		$conditions=array();
		foreach($this->conditions as $condition)
			if($condition!=='')
				$conditions[]=$condition;
		if($conditions!==array())
			$sql.=' WHERE (' . implode(') AND (',$conditions).')';

		$groups=array();
		foreach($this->groups as $group)
			if($group!=='')
				$groups[]=$group;
		if($groups!==array())
			$sql.=' GROUP BY ' . implode(', ',$groups);

		$havings=array();
		foreach($this->havings as $having)
			if($having!=='')
				$havings[]=$having;
		if($havings!==array())
			$sql.=' HAVING (' . implode(') AND (',$havings).')';

		$orders=array();
		foreach($this->orders as $order)
			if($order!=='')
				$orders[]=$order;
		if($orders!==array())
			$sql.=' ORDER BY ' . implode(', ',$orders);

		$sql=$builder->applyLimit($sql,$this->limit,$this->offset);
		$command=$builder->getDbConnection()->createCommand($sql);
		$builder->bindValues($command,$this->params);
		return $command;
	}
}


/**
 * CStatElement represents STAT join element for {@link CActiveFinder}.
 *
 * @author Qiang Xue <qiang.xue@gmail.com>
 * @version $Id: CActiveFinder.php 1127 2009-06-13 20:26:35Z qiang.xue $
 * @package System.Testing.Data.ActiveRecord
 * @since 1.0.4
 */
class TStatElement
{
	/**
	 * @var CActiveRelation the relation represented by this tree node
	 */
	public $relation;

	private $_finder;
	private $_parent;

	/**
	 * Constructor.
	 * @param CActiveFinder the finder
	 * @param CStatRelation the STAT relation
	 * @param CJoinElement the join element owning this STAT element
	 */
	public function __construct($finder,$relation,$parent)
	{
		$this->_finder=$finder;
		$this->_parent=$parent;
		$this->relation=$relation;
		$parent->stats[]=$this;
	}

	/**
	 * Performs the STAT query.
	 */
	public function query()
	{
		if(preg_match('/^\s*(.*?)\((.*)\)\s*$/',$this->relation->foreignKey,$matches))
			$this->queryManyMany($matches[1],$matches[2]);
		else
			$this->queryOneMany();
	}

	private function queryOneMany()
	{
		$relation=$this->relation;
		$model=TActiveRecord::model($relation->className);
		$builder=$model->getCommandBuilder();
		$schema=$builder->getSchema();
		$table=$model->getTableSchema();
		$pkTable=$this->_parent->model->getTableSchema();

		$fks=preg_split('/[\s,]+/',$relation->foreignKey,-1,PREG_SPLIT_NO_EMPTY);
		if(count($fks)!==count($pkTable->primaryKey))
			throw new TDbException('The relation "'.($relation->name).'" in active record class "'.get_class($parent->model).'" is specified with an invalid foreign key. The columns in the key must match the primary keys of the table "'.($pkTable->name).'".');

		// set up mapping between fk and pk columns
		$map=array();  // pk=>fk
		foreach($fks as $i=>$fk)
		{
			if(!isset($table->columns[$fk]))
				throw new TDbException('The relation "'.($relation->name).'" in active record class "'.get_class($parent->model).'" is specified with an invalid foreign key "'.$fk.'". There is no such column in the table "'.($table->name).'".');

			if(isset($table->foreignKeys[$fk]))
			{
				list($tableName,$pk)=$table->foreignKeys[$fk];
				if($schema->compareTableNames($pkTable->rawName,$tableName))
					$map[$pk]=$fk;
				else
					throw new TDbException('The relation "'.($relation->name).'" in active record class "'.get_class($parent->model).'" is specified with a foreign key "'.$fk.'" that does not point to the parent table "'.($pkTable->name).'".');
			}
			else  // FK constraints undefined
			{
				if(is_array($table->primaryKey)) // composite PK
					$map[$table->primaryKey[$i]]=$fk;
			}
		}

		$records=$this->_parent->records;

		$where=empty($relation->condition)?'' : ' WHERE ('.$relation->condition.')';
		$group=empty($relation->group)?'' : ', '.$relation->group;
		$having=empty($relation->having)?'' : ' AND ('.$relation->having.')';
		$order=empty($relation->order)?'' : ' ORDER BY '.$relation->order;

		$c=$schema->quoteColumnName('c');
		$s=$schema->quoteColumnName('s');

		// generate and perform query
		if(count($fks)===1)  // single column FK
		{
			$col=$table->columns[$fks[0]]->rawName;
			$sql="SELECT $col AS $c, {$relation->select} AS $s FROM {$table->rawName}"
				.$where
				." GROUP BY $col".$group
				." HAVING ".$builder->createInCondition($table,$fks[0],array_keys($records))
				.$having.$order;
			$command=$builder->getDbConnection()->createCommand($sql);
			if(is_array($relation->params))
				$builder->bindValues($command,$relation->params);
			$stats=array();
			foreach($command->queryAll() as $row)
				$stats[$row['c']]=$row['s'];
		}
		else  // composite FK
		{
			$keys=array_keys($records);
			foreach($keys as &$key)
			{
				$key2=unserialize($key);
				$key=array();
				foreach($pkTable->primaryKey as $pk)
					$key[$map[$pk]]=$key2[$pk];
			}
			$cols=array();
			foreach($pkTable->primaryKey as $n=>$pk)
			{
				$name=$table->columns[$map[$pk]]->rawName;
				$cols[$name]=$name.' AS '.$schema->quoteColumnName('c'.$n);
			}
			$sql='SELECT '.implode(', ',$cols).", {$relation->select} AS $s FROM {$table->rawName}"
				.$where
				.' GROUP BY '.implode(', ',array_keys($cols)).$group
				.' HAVING '.$builder->createInCondition($table,$fks,$keys)
				.$having.$order;
			$command=$builder->getDbConnection()->createCommand($sql);
			if(is_array($relation->params))
				$builder->bindValues($command,$relation->params);
			$stats=array();
			foreach($command->queryAll() as $row)
			{
				$key=array();
				foreach($pkTable->primaryKey as $n=>$pk)
					$key[$pk]=$row['c'.$n];
				$stats[serialize($key)]=$row['s'];
			}
		}

		// populate the results into existing records
		foreach($records as $pk=>$record)
			$record->addRelatedRecord($relation->name,isset($stats[$pk])?$stats[$pk]:$relation->defaultValue,false);
	}

	private function queryManyMany($joinTableName,$keys)
	{
		$relation=$this->relation;
		$model=TActiveRecord::model($relation->className);
		$table=$model->getTableSchema();
		$builder=$model->getCommandBuilder();
		$schema=$builder->getSchema();
		$pkTable=$this->_parent->model->getTableSchema();

		if(($joinTable=$builder->getSchema()->getTable($joinTableName))===null)
			throw new TDbException('The relation "'.($relation->name).'" in active record class "'.get_class($this->_parent->model).'" is not specified correctly. The join table "'.$joinTableName.'" given in the foreign key cannot be found in the database.');

		$fks=preg_split('/[\s,]+/',$keys,-1,PREG_SPLIT_NO_EMPTY);
		if(count($fks)!==count($table->primaryKey)+count($pkTable->primaryKey))
			throw new TDbException('The relation "'.($relation->name).'" in active record class "'.get_class($this->_parent->model).'" is specified with an incomplete foreign key. The foreign key must consist of columns referencing both joining tables.');

		$joinCondition=array();
		$map=array();
		foreach($fks as $i=>$fk)
		{
			if(!isset($joinTable->columns[$fk]))
				throw new TDbException('The relation "'.($relation->name).'" in active record class "'.get_class($this->_parent->model).'" is specified with an invalid foreign key "'.$fk.'". There is no such column in the table "'.($joinTable->name).'".');

			if(isset($joinTable->foreignKeys[$fk]))
			{
				list($tableName,$pk)=$joinTable->foreignKeys[$fk];
				if(!isset($joinCondition[$pk]) && $schema->compareTableNames($table->rawName,$tableName))
					$joinCondition[$pk]=$table->rawName.'.'.$schema->quoteColumnName($pk).'='.$joinTable->rawName.'.'.$schema->quoteColumnName($fk);
				else if(!isset($map[$pk]) && $schema->compareTableNames($pkTable->rawName,$tableName))
					$map[$pk]=$fk;
				else
					throw new TDbException('The relation "'.($relation->name).'" in active record class "'.get_class($this->_parent->model).'" is specified with an invalid foreign key "'.$fk.'". The foreign key does not point to either joining table.');
			}
			else // FK constraints not defined
			{
				if($i<count($pkTable->primaryKey))
				{
					$pk=is_array($pkTable->primaryKey) ? $pkTable->primaryKey[$i] : $pkTable->primaryKey;
					$map[$pk]=$fk;
				}
				else
				{
					$j=$i-count($pkTable->primaryKey);
					$pk=is_array($table->primaryKey) ? $table->primaryKey[$j] : $table->primaryKey;
					$joinCondition[$pk]=$table->rawName.'.'.$schema->quoteColumnName($pk).'='.$joinTable->rawName.'.'.$schema->quoteColumnName($fk);
				}
			}
		}

		if($joinCondition===array() || $map===array())
			throw new TDbException('The relation "'.($relation->name).'" in active record class "'.get_class($this->_parent->model).'" is specified with an incomplete foreign key. The foreign key must consist of columns referencing both joining tables.');

		$records=$this->_parent->records;

		$cols=array();
		foreach(is_string($pkTable->primaryKey)?array($pkTable->primaryKey):$pkTable->primaryKey as $n=>$pk)
		{
			$name=$joinTable->rawName.'.'.$schema->quoteColumnName($map[$pk]);
			$cols[$name]=$name.' AS '.$schema->quoteColumnName('c'.$n);
		}

		$keys=array_keys($records);
		if(is_array($pkTable->primaryKey))
		{
			foreach($keys as &$key)
			{
				$key2=unserialize($key);
				$key=array();
				foreach($pkTable->primaryKey as $pk)
					$key[$map[$pk]]=$key2[$pk];
			}
		}

		$where=empty($relation->condition)?'' : ' WHERE ('.$relation->condition.')';
		$group=empty($relation->group)?'' : ', '.$relation->group;
		$having=empty($relation->having)?'' : ' AND ('.$relation->having.')';
		$order=empty($relation->order)?'' : ' ORDER BY '.$relation->order;

		$sql='SELECT '.$this->relation->select.' AS '.$schema->quoteColumnName('s').', '.implode(', ',$cols)
			.' FROM '.$table->rawName.' INNER JOIN '.$joinTable->rawName
			.' ON ('.implode(') AND (',$joinCondition).')'
			.$where
			.' GROUP BY '.implode(', ',array_keys($cols)).$group
			.' HAVING ('.$builder->createInCondition($joinTable,$map,$keys).')'
			.$having.$order;

		$command=$builder->getDbConnection()->createCommand($sql);
		if(is_array($relation->params))
			$builder->bindValues($command,$relation->params);

		$stats=array();
		foreach($command->queryAll() as $row)
		{
			if(is_array($pkTable->primaryKey))
			{
				$key=array();
				foreach($pkTable->primaryKey as $n=>$k)
					$key[$k]=$row['c'.$n];
				$stats[serialize($key)]=$row['s'];
			}
			else
				$stats[$row['c0']]=$row['s'];
		}

		foreach($records as $pk=>$record)
			$record->addRelatedRecord($relation->name,isset($stats[$pk])?$stats[$pk]:$this->relation->defaultValue,false);
	}
}