1
# Copyright (c) 2008, 2011 Oracle and/or its affiliates. All rights reserved.
2
# Use is subject to license terms.
4
# This program is free software; you can redistribute it and/or modify
5
# it under the terms of the GNU General Public License as published by
6
# the Free Software Foundation; version 2 of the License.
8
# This program is distributed in the hope that it will be useful, but
9
# WITHOUT ANY WARRANTY; without even the implied warranty of
10
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
11
# General Public License for more details.
13
# You should have received a copy of the GNU General Public License
14
# along with this program; if not, write to the Free Software
15
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301
18
# **NOTE** Joins for this grammar are currently not working as intended.
19
# For example, if we have tables 1, 2, and 3, we end up with ON conditions that
20
# only involve tables 2 and 3.
21
# This will be fixed, but initial attempts at altering this had a negative
22
# impact on the coverage the test was providing. To be fixed when scheduling
23
# permits. We are still seeing significant coverage with the grammar as-is.
25
################################################################################
26
# optimizer_subquery.yy: Random Query Generator grammar for testing subquery #
27
# optimizations. This grammar *should* hit the #
28
# optimizations listed here: #
29
# https://inside.mysql.com/wiki/Optimizer_grammar_worksheet #
30
# see: WL#5006 Random Query Generator testing of Azalea Optimizer- subqueries #
31
# https://intranet.mysql.com/worklog/QA-Sprint/?tid=5006 #
34
# queries: 10k+. We can see a lot with lower values, but over 10k is #
35
# best. The intersect optimization happens with low frequency #
36
# so larger values help us to hit it at least some of the time #
37
# engines: MyISAM *and* Innodb. Certain optimizations are only hit with #
38
# one engine or another and we should use both to ensure we #
39
# are getting maximum coverage #
40
# Validators: ResultsetComparatorSimplify #
41
# - used on server-server comparisons #
42
# Transformer - used on a single server #
43
# - creates equivalent versions of a single query #
44
# SelectStability - used on a single server #
45
# - ensures the same query produces stable result sets #
46
################################################################################
48
################################################################################
49
# The perl code in {} helps us with bookkeeping for writing more sensible #
50
# queries. We need to keep track of these items to ensure we get interesting #
51
# and stable queries that find bugs rather than wondering if our query is #
53
################################################################################
55
{ @nonaggregates = () ; $tables = 0 ; $fields = 0 ; $subquery_idx=0 ; $child_subquery_idx=0 ; "" } main_select ;
58
simple_select | simple_select | simple_select | simple_select |
59
mixed_select | mixed_select | mixed_select | mixed_select |
63
explain_extended SELECT distinct straight_join select_option select_list
71
explain_extended SELECT distinct straight_join select_option simple_select_list
79
explain_extended SELECT distinct straight_join select_option aggregate_select_list
87
| | | | | | | | | explain_extended2 ;
89
explain_extended2: | | | | EXPLAIN | EXPLAIN EXTENDED ;
91
distinct: DISTINCT | | | | | | | | | ;
93
select_option: | | | | | | | | | | | SQL_SMALL_RESULT ;
95
straight_join: | | | | | | | | | | | | | | | | | | | | | STRAIGHT_JOIN ;
99
new_select_item , select_list |
100
new_select_item , select_list ;
103
nonaggregate_select_item |
104
nonaggregate_select_item , simple_select_list |
105
nonaggregate_select_item , simple_select_list ;
107
aggregate_select_list:
108
aggregate_select_item | aggregate_select_item |
109
aggregate_select_item, aggregate_select_list ;
112
################################################################################
113
# this limits us to 2 and 3 table joins / can use it if we hit #
114
# too many mega-join conditions which take too long to run #
115
################################################################################
116
( new_table_item join_type new_table_item ON (join_condition_item ) ) |
117
( new_table_item join_type ( ( new_table_item join_type new_table_item ON (join_condition_item ) ) ) ON (join_condition_item ) ) |
118
( new_table_item , new_table_item ) |
119
( new_table_item , new_table_item , new_table_item ) ;
123
################################################################################
124
# preventing deep join nesting for run time / table access methods are more #
125
# important here - join.yy can provide deeper join coverage #
126
# Enabling this / swapping out with join_list above can produce some #
127
# time-consuming queries. #
128
################################################################################
131
( new_table_item join_type join_list ON (join_condition_item ) ) ;
134
INNER JOIN | left_right outer JOIN |
135
INNER JOIN | left_right outer JOIN |
136
INNER JOIN | left_right outer JOIN |
137
INNER JOIN | left_right outer JOIN |
138
INNER JOIN | left_right outer JOIN |
142
current_table_item . int_indexed = previous_table_item . int_field_name on_subquery |
143
current_table_item . int_field_name = previous_table_item . int_indexed on_subquery |
144
current_table_item . `col_varchar_key` = previous_table_item . char_field_name on_subquery |
145
current_table_item . char_field_name = previous_table_item . `col_varchar_key` on_subquery ;
148
|||||||||||||||||||| { $subquery_idx += 1 ; $subquery_tables=0 ; ""} and_or general_subquery ;
158
WHERE where_subquery |
159
WHERE ( where_subquery ) and_or where_list |
160
WHERE ( where_subquery ) and_or where_list ;
165
range_predicate1_list | range_predicate2_list |
166
range_predicate1_list and_or generic_where_list |
167
range_predicate2_list and_or generic_where_list ;
172
( where_item and_or where_item ) ;
179
alias1 . int_field_name arithmetic_operator existing_table_item . int_field_name |
180
existing_table_item . char_field_name arithmetic_operator _char |
181
existing_table_item . char_field_name arithmetic_operator existing_table_item . char_field_name |
182
alias1 . _field IS not NULL |
183
alias1 . int_field_name arithmetic_operator existing_table_item . int_field_name |
184
existing_table_item . char_field_name arithmetic_operator _char |
185
existing_table_item . char_field_name arithmetic_operator existing_table_item . char_field_name |
186
alias1 . _field IS not NULL ;
188
################################################################################
190
################################################################################
193
{ $subquery_idx += 1 ; $subquery_tables=0 ; ""} subquery_type ;
196
general_subquery | special_subquery ;
199
existing_table_item . int_field_name arithmetic_operator int_single_value_subquery |
200
existing_table_item . char_field_name arithmetic_operator char_single_value_subquery |
201
existing_table_item . int_field_name membership_operator int_single_member_subquery |
202
( existing_table_item . int_field_name , existing_table_item . int_field_name ) not IN int_double_member_subquery |
203
existing_table_item . char_field_name membership_operator char_single_member_subquery |
204
( existing_table_item . char_field_name , existing_table_item . char_field_name ) not IN char_double_member_subquery |
205
( _digit, _digit ) not IN int_double_member_subquery |
206
( _char, _char ) not IN char_double_member_subquery |
207
existing_table_item . int_field_name membership_operator int_single_union_subquery |
208
existing_table_item . char_field_name membership_operator char_single_union_subquery ;
210
general_subquery_union_test_disabled:
211
existing_table_item . char_field_name arithmetic_operator all_any char_single_union_subquery_disabled |
212
existing_table_item . int_field_name arithmetic_operator all_any int_single_union_subquery_disabled ;
215
not EXISTS ( int_single_member_subquery ) |
216
not EXISTS ( char_single_member_subquery ) |
217
not EXISTS int_correlated_subquery |
218
not EXISTS char_correlated_subquery |
219
existing_table_item . int_field_name membership_operator int_correlated_subquery |
220
existing_table_item . char_field_name membership_operator char_correlated_subquery |
221
int_single_value_subquery IS not NULL |
222
char_single_value_subquery IS not NULL ;
224
int_single_value_subquery:
225
( SELECT distinct select_option aggregate subquery_table_one_two . int_field_name ) AS { "SQ".$subquery_idx."_field1" }
227
( SELECT distinct select_option aggregate subquery_table_one_two . int_field_name ) AS { "SQ".$subquery_idx."_field1" }
229
( SELECT _digit FROM DUAL ) ;
231
char_single_value_subquery:
232
( SELECT distinct select_option aggregate subquery_table_one_two . char_field_name ) AS { "SQ".$subquery_idx."_field1" }
234
( SELECT distinct select_option aggregate subquery_table_one_two . char_field_name ) AS { "SQ".$subquery_idx."_field1" }
236
( SELECT _char FROM DUAL ) ;
238
int_single_member_subquery:
239
( SELECT distinct select_option subquery_table_one_two . int_field_name AS { "SQ".$subquery_idx."_field1" }
241
single_subquery_group_by
243
( SELECT _digit FROM DUAL ) ;
245
int_single_union_subquery:
246
( SELECT _digit UNION all_distinct SELECT _digit ) ;
248
int_single_union_subquery_disabled:
249
int_single_member_subquery UNION all_distinct int_single_member_subquery ;
251
int_double_member_subquery:
252
( SELECT distinct select_option subquery_table_one_two . int_field_name AS { "SQ".$subquery_idx."_field1" } ,
253
subquery_table_one_two . int_field_name AS { "SQ".$subquery_idx."_field2" }
255
double_subquery_group_by
257
( SELECT distinct select_option subquery_table_one_two . int_field_name AS { "SQ".$subquery_idx."_field1" } ,
258
aggregate subquery_table_one_two . int_field_name ) AS { "SQ".$subquery_idx."_field2" }
260
single_subquery_group_by
262
( SELECT _digit , _digit UNION all_distinct SELECT _digit, _digit ) ;
264
char_single_member_subquery:
265
( SELECT distinct select_option subquery_table_one_two . char_field_name AS { "SQ".$subquery_idx."_field1" }
267
single_subquery_group_by
270
char_single_union_subquery:
271
( SELECT _char UNION all_distinct SELECT _char ) ;
273
char_single_union_subquery_disabled:
274
char_single_member_subquery UNION all_distinct char_single_member_subquery ;
276
char_double_member_subquery:
277
( SELECT distinct select_option subquery_table_one_two . char_field_name AS { "SQ".$subquery_idx."_field1" } ,
278
subquery_table_one_two . char_field_name AS { "SQ".$subquery_idx."_field2" }
280
double_subquery_group_by
282
( SELECT distinct select_option subquery_table_one_two . char_field_name AS { "SQ".$subquery_idx."_field1" } ,
283
aggregate subquery_table_one_two . char_field_name ) AS { "SQ".$subquery_idx."_field2" }
285
single_subquery_group_by
287
( SELECT _char , _char UNION all_distinct SELECT _char , _char ) ;
289
int_correlated_subquery:
290
( SELECT distinct select_option subquery_table_one_two . int_field_name AS { "SQ".$subquery_idx."_field1" }
291
FROM subquery_join_list
292
correlated_subquery_where_clause ) ;
294
char_correlated_subquery:
295
( SELECT distinct select_option subquery_table_one_two . char_field_name AS { "SQ".$subquery_idx."_field1" }
296
FROM subquery_join_list
297
correlated_subquery_where_clause ) ;
299
int_scalar_correlated_subquery:
300
( SELECT distinct select_option aggregate subquery_table_one_two . int_field_name ) AS { "SQ".$subquery_idx."_field1" }
301
FROM subquery_join_list
302
correlated_subquery_where_clause ) ;
305
FROM subquery_join_list
306
subquery_where_clause ;
308
subquery_where_clause:
309
| | WHERE subquery_where_list ;
311
correlated_subquery_where_clause:
312
WHERE correlated_subquery_where_list ;
314
correlated_subquery_where_list:
315
correlated_subquery_where_item |
316
correlated_subquery_where_item and_or correlated_subquery_where_item |
317
correlated_subquery_where_item and_or subquery_where_item ;
319
correlated_subquery_where_item:
320
existing_subquery_table_item . int_field_name arithmetic_operator existing_table_item . int_field_name |
321
existing_subquery_table_item . char_field_name arithmetic_operator existing_table_item . char_field_name ;
324
subquery_where_item | subquery_where_item | subquery_where_item |
325
( subquery_where_item and_or subquery_where_item ) ;
328
existing_subquery_table_item . int_field_name arithmetic_operator _digit |
329
existing_subquery_table_item . char_field_name arithmetic_operator _char |
330
existing_subquery_table_item . int_field_name arithmetic_operator existing_subquery_table_item . int_field_name |
331
existing_subquery_table_item . char_field_name arithmetic_operator existing_subquery_table_item . char_field_name |
335
subquery_new_table_item | subquery_new_table_item |
336
( subquery_new_table_item , subquery_new_table_item ) |
337
( subquery_new_table_item join_type subquery_new_table_item ON (subquery_join_condition_item ) ) |
338
( subquery_new_table_item join_type subquery_new_table_item ON (subquery_join_condition_item ) ) |
339
( subquery_new_table_item join_type ( subquery_new_table_item join_type subquery_new_table_item ON (subquery_join_condition_item ) ) ON (subquery_join_condition_item ) ) ;
341
subquery_join_condition_item:
342
subquery_current_table_item . int_field_name = subquery_previous_table_item . int_indexed subquery_on_subquery |
343
subquery_current_table_item . int_indexed = subquery_previous_table_item . int_field_name subquery_on_subquery |
344
subquery_current_table_item . `col_varchar_key` = subquery_previous_table_item . char_field_name subquery_on_subquery |
345
subquery_current_table_item . char_field_name = subquery_previous_table_item . `col_varchar_key` subquery_on_subquery ;
347
subquery_on_subquery:
348
|||||||||||||||||||| { $child_subquery_idx += 1 ; $child_subquery_tables=0 ; ""} and_or general_child_subquery ;
350
single_subquery_group_by:
351
| | | | | | | | | GROUP BY { "SQ".$subquery_idx."_field1" } ;
354
double_subquery_group_by:
355
| | | | | | | | | GROUP BY { "SQ".$subquery_idx."_field1" } , { "SQ".$subquery_idx."_field2" } ;
358
| | | | | | | | | | HAVING subquery_having_list ;
360
subquery_having_list:
361
subquery_having_item |
362
subquery_having_item |
363
(subquery_having_list and_or subquery_having_item) ;
365
subquery_having_item:
366
existing_subquery_table_item . int_field_name arithmetic_operator _digit |
367
existing_subquery_table_item . int_field_name arithmetic_operator _char ;
370
################################################################################
371
# Child subquery rules
372
################################################################################
375
{ $child_subquery_idx += 1 ; $child_subquery_tables=0 ; ""} child_subquery_type ;
378
general_child_subquery | special_child_subquery ;
380
general_child_subquery:
381
existing_subquery_table_item . int_field_name arithmetic_operator int_single_value_child_subquery |
382
existing_subquery_table_item . char_field_name arithmetic_operator char_single_value_child_subquery |
383
existing_subquery_table_item . int_field_name membership_operator int_single_member_child_subquery |
384
( existing_subquery_table_item . int_field_name , existing_subquery_table_item . int_field_name ) not IN int_double_member_child_subquery |
385
existing_subquery_table_item . char_field_name membership_operator char_single_member_child_subquery |
386
( existing_subquery_table_item . char_field_name , existing_subquery_table_item . char_field_name ) not IN char_double_member_child_subquery |
387
( _digit, _digit ) not IN int_double_member_child_subquery |
388
( _char, _char ) not IN char_double_member_child_subquery |
389
existing_subquery_table_item . int_field_name membership_operator int_single_union_child_subquery |
390
existing_subquery_table_item . char_field_name membership_operator char_single_union_child_subquery ;
392
special_child_subquery:
393
not EXISTS ( int_single_member_child_subquery ) |
394
not EXISTS ( char_single_member_child_subquery ) |
395
not EXISTS int_correlated_child_subquery |
396
not EXISTS char_correlated_child_subquery |
397
existing_subquery_table_item . int_field_name membership_operator int_correlated_child_subquery |
398
existing_subquery_table_item . char_field_name membership_operator char_correlated_child_subquery ;
401
int_single_value_child_subquery:
402
( SELECT distinct select_option aggregate child_subquery_table_one_two . int_field_name ) AS { "C_SQ".$child_subquery_idx."_field1" }
403
child_subquery_body ) ;
405
char_single_value_child_subquery:
406
( SELECT distinct select_option aggregate child_subquery_table_one_two . char_field_name ) AS { "C_SQ".$child_subquery_idx."_field1" }
407
child_subquery_body ) ;
409
int_single_member_child_subquery:
410
( SELECT distinct select_option child_subquery_table_one_two . int_field_name AS { "C_SQ".$child_subquery_idx."_field1" }
412
single_child_subquery_group_by
413
child_subquery_having ) ;
415
int_single_union_child_subquery:
416
( SELECT _digit UNION all_distinct SELECT _digit ) ;
418
int_double_member_child_subquery:
419
( SELECT distinct select_option child_subquery_table_one_two . int_field_name AS { "C_SQ".$child_subquery_idx."_field1" } ,
420
child_subquery_table_one_two . int_field_name AS { "C_SQ".$child_subquery_idx."_field2" }
422
double_child_subquery_group_by
423
child_subquery_having ) |
424
( SELECT distinct select_option child_subquery_table_one_two . int_field_name AS { "C_SQ".$child_subquery_idx."_field1" } ,
425
aggregate child_subquery_table_one_two . int_field_name ) AS { "C_SQ".$child_subquery_idx."_field2" }
427
single_child_subquery_group_by
428
child_subquery_having );
430
char_single_member_child_subquery:
431
( SELECT distinct select_option child_subquery_table_one_two . char_field_name AS { "C_SQ".$child_subquery_idx."_field1" }
433
single_child_subquery_group_by
434
child_subquery_having) ;
436
char_single_union_child_subquery:
437
( SELECT _digit UNION all_distinct SELECT _digit ) ;
439
char_double_member_child_subquery:
440
( SELECT distinct select_option child_subquery_table_one_two . char_field_name AS { "C_SQ".$child_subquery_idx."_field1" } ,
441
child_subquery_table_one_two . char_field_name AS { "C_SQ".$child_subquery_idx."_field2" }
443
double_child_subquery_group_by
444
child_subquery_having ) |
445
( SELECT distinct select_option child_subquery_table_one_two . char_field_name AS { "C_SQ".$child_subquery_idx."_field1" } ,
446
aggregate child_subquery_table_one_two . char_field_name ) AS { "C_SQ".$child_subquery_idx."_field2" }
448
single_child_subquery_group_by
449
child_subquery_having );
451
int_correlated_child_subquery:
452
( SELECT distinct select_option child_subquery_table_one_two . int_field_name AS { "C_SQ".$subquery_idx."_field1" }
453
FROM child_subquery_join_list
454
correlated_child_subquery_where_clause ) ;
456
char_correlated_child_subquery:
457
( SELECT distinct select_option child_subquery_table_one_two . char_field_name AS { "C_SQ".$subquery_idx."_field1" }
458
FROM child_subquery_join_list
459
correlated_child_subquery_where_clause ) ;
462
FROM child_subquery_join_list
463
child_subquery_where_clause ;
465
child_subquery_where_clause:
466
| WHERE child_subquery_where_list ;
468
correlated_child_subquery_where_clause:
469
WHERE correlated_child_subquery_where_list ;
471
correlated_child_subquery_where_list:
472
correlated_child_subquery_where_item | correlated_child_subquery_where_item | correlated_child_subquery_where_item |
473
correlated_child_subquery_where_item and_or correlated_child_subquery_where_item |
474
correlated_child_subquery_where_item and_or child_subquery_where_item ;
476
correlated_child_subquery_where_item:
477
existing_child_subquery_table_item . int_field_name arithmetic_operator existing_subquery_table_item . int_field_name |
478
existing_child_subquery_table_item . char_field_name arithmetic_operator existing_subquery_table_item . char_field_name ;
480
child_subquery_where_list:
481
child_subquery_where_item | child_subquery_where_item | child_subquery_where_item |
482
( child_subquery_where_item and_or child_subquery_where_item ) ;
484
child_subquery_where_item:
485
existing_child_subquery_table_item . int_field_name arithmetic_operator _digit |
486
existing_child_subquery_table_item . char_field_name arithmetic_operator _char |
487
existing_child_subquery_table_item . int_field_name arithmetic_operator existing_child_subquery_table_item . int_field_name |
488
existing_child_subquery_table_item . char_field_name arithmetic_operator existing_child_subquery_table_item . char_field_name ;
490
# child_child_subquery ;
492
child_subquery_join_list:
493
child_subquery_new_table_item | child_subquery_new_table_item |
494
( child_subquery_new_table_item join_type child_subquery_new_table_item ON (child_subquery_join_condition_item ) ) |
495
( child_subquery_new_table_item join_type child_subquery_new_table_item ON (child_subquery_join_condition_item ) ) |
496
( child_subquery_new_table_item join_type ( ( child_subquery_new_table_item join_type child_subquery_new_table_item ON (child_subquery_join_condition_item ) ) ) ON (child_subquery_join_condition_item ) ) ;
498
child_subquery_join_condition_item:
499
child_subquery_current_table_item . int_field_name = child_subquery_previous_table_item . int_indexed |
500
child_subquery_current_table_item . int_indexed = child_subquery_previous_table_item . int_field_name |
501
child_subquery_current_table_item . `col_varchar_key` = child_subquery_previous_table_item . char_field_name |
502
child_subquery_current_table_item . char_field_name = child_subquery_previous_table_item . `col_varchar_key` ;
504
single_child_subquery_group_by:
505
| | | | | | | | | GROUP BY { "C_SQ".$child_subquery_idx."_field1" } ;
508
double_child_subquery_group_by:
509
| | | | | | | | | GROUP BY { "C_SQ".$child_subquery_idx."_field1" } , { "C_SQ".$child_subquery_idx."_field2" } ;
511
child_subquery_having:
512
| | | | | | | | | | HAVING child_subquery_having_list ;
514
child_subquery_having_list:
515
child_subquery_having_item |
516
child_subquery_having_item |
517
(child_subquery_having_list and_or child_subquery_having_item) ;
519
child_subquery_having_item:
520
existing_child_subquery_table_item . int_field_name arithmetic_operator _digit |
521
existing_child_subquery_table_item . int_field_name arithmetic_operator _char ;
524
################################################################################
525
# The range_predicate_1* rules below are in place to ensure we hit the #
526
# index_merge/sort_union optimization. #
527
# NOTE: combinations of the predicate_1 and predicate_2 rules tend to hit the #
528
# index_merge/intersect optimization #
529
################################################################################
531
range_predicate1_list:
532
range_predicate1_item |
533
( range_predicate1_item OR range_predicate1_item ) ;
535
range_predicate1_item:
536
alias1 . int_indexed not BETWEEN _tinyint_unsigned[invariant] AND ( _tinyint_unsigned[invariant] + _tinyint_unsigned ) |
537
alias1 . `col_varchar_key` arithmetic_operator _char[invariant] |
538
alias1 . int_indexed not IN (number_list) |
539
alias1 . `col_varchar_key` not IN (char_list) |
540
alias1 . `pk` > _tinyint_unsigned[invariant] AND alias1 . `pk` < ( _tinyint_unsigned[invariant] + _tinyint_unsigned ) |
541
alias1 . `col_int_key` > _tinyint_unsigned[invariant] AND alias1 . `col_int_key` < ( _tinyint_unsigned[invariant] + _tinyint_unsigned ) ;
543
################################################################################
544
# The range_predicate_2* rules below are in place to ensure we hit the #
545
# index_merge/union optimization. #
546
# NOTE: combinations of the predicate_1 and predicate_2 rules tend to hit the #
547
# index_merge/intersect optimization #
548
################################################################################
550
range_predicate2_list:
551
range_predicate2_item |
552
( range_predicate2_item and_or range_predicate2_item ) ;
554
range_predicate2_item:
555
alias1 . `pk` = _tinyint_unsigned |
556
alias1 . `col_int_key` = _tinyint_unsigned |
557
alias1 . `col_varchar_key` = _char |
558
alias1 . int_indexed = _tinyint_unsigned |
559
alias1 . `col_varchar_key` LIKE CONCAT( _char , '%') |
560
alias1 . int_indexed = existing_table_item . int_indexed |
561
alias1 . `col_varchar_key` = existing_table_item . `col_varchar_key` ;
563
################################################################################
564
# The number and char_list rules are for creating WHERE conditions that test #
565
# 'field' IN (list_of_items) #
566
################################################################################
568
_tinyint_unsigned | number_list, _tinyint_unsigned ;
571
_char | 'USA' | char_list , _char | char_list , 'USA' ;
573
################################################################################
574
# We ensure that a GROUP BY statement includes all nonaggregates. #
575
# This helps to ensure the query is more useful in detecting real errors / #
576
# that the query doesn't lend itself to variable result sets #
577
################################################################################
579
{ scalar(@nonaggregates) > 0 ? " GROUP BY ".join (', ' , @nonaggregates ) : "" } ;
582
| | group_by_clause ;
585
| HAVING having_list;
590
(having_list and_or having_item) ;
593
existing_select_item arithmetic_operator value |
594
existing_select_item arithmetic_operator value |
595
existing_select_item arithmetic_operator value |
596
existing_select_item arithmetic_operator value |
597
existing_select_item arithmetic_operator value |
598
existing_select_item arithmetic_operator value |
599
{ $subquery_idx += 1 ; $subquery_tables=0 ; ""} general_subquery;
601
################################################################################
602
# We use the total_order_by rule when using the LIMIT operator to ensure that #
603
# we have a consistent result set - server1 and server2 should not differ #
604
################################################################################
608
ORDER BY alias1 . _field_indexed desc , total_order_by limit |
609
ORDER BY order_by_list |
610
ORDER BY order_by_list, total_order_by limit ;
613
{ join(', ', map { "field".$_ } (1..$fields) ) };
617
order_by_item , order_by_list ;
620
alias1 . _field_indexed , existing_table_item .`pk` desc |
621
alias1 . _field_indexed desc |
622
existing_select_item desc |
623
CONCAT( existing_table_item . char_field_name, existing_table_item . char_field_name );
629
| | LIMIT limit_size | LIMIT limit_size OFFSET _digit;
632
nonaggregate_select_item |
633
nonaggregate_select_item |
634
aggregate_select_item |
636
nonaggregate_select_item |
637
nonaggregate_select_item |
638
aggregate_select_item |
641
################################################################################
642
# We have the perl code here to help us write more sensible queries #
643
# It allows us to use field1...fieldn in the WHERE, ORDER BY, and GROUP BY #
644
# clauses so that the queries will produce more stable and interesting results #
645
################################################################################
647
nonaggregate_select_item:
648
table_one_two . _field_indexed AS { my $f = "field".++$fields ; push @nonaggregates , $f ; $f } |
649
table_one_two . _field_indexed AS { my $f = "field".++$fields ; push @nonaggregates , $f ; $f } |
650
table_one_two . _field AS { my $f = "field".++$fields ; push @nonaggregates , $f ; $f } ;
652
aggregate_select_item:
653
aggregate table_one_two . _field ) AS { "field".++$fields };
656
{ $subquery_idx += 1 ; $subquery_tables=0 ; ""} select_subquery_body;
658
select_subquery_body:
659
int_single_value_subquery AS { my $f = "field".++$fields ; push @nonaggregates , $f ; $f } |
660
char_single_value_subquery AS { my $f = "field".++$fields ; push @nonaggregates , $f ; $f } |
661
int_scalar_correlated_subquery AS { my $f = "field".++$fields ; push @nonaggregates , $f ; $f } ;
663
select_subquery_body_disabled:
664
( SELECT _digit UNION all_distinct ( SELECT _digit ) LIMIT 1 ) AS { my $f = "field".++$fields ; push @nonaggregates , $f ; $f } |
665
( SELECT _char UNION all_distinct ( SELECT _char ) LIMIT 1 ) AS { my $f = "field".++$fields ; push @nonaggregates , $f ; $f } ;
667
################################################################################
668
# The combo_select_items are for 'spice'
669
################################################################################
672
( ( table_one_two . int_field_name ) math_operator ( table_one_two . int_field_name ) ) AS { my $f = "field".++$fields ; push @nonaggregates , $f ; $f } |
673
CONCAT( table_one_two . char_field_name , table_one_two . char_field_name ) AS { my $f = "field".++$fields ; push @nonaggregates , $f ; $f } ;
676
alias1 | alias1 | alias2 ;
678
subquery_table_one_two:
679
{ "SQ".$subquery_idx."_alias1" ; } | { "SQ".$subquery_idx."_alias1" ; } |
680
{ "SQ".$subquery_idx."_alias1" ; } | { "SQ".$subquery_idx."_alias2" ; } ;
682
child_subquery_table_one_two:
683
{ "C_SQ".$child_subquery_idx."_alias1" ; } | { "C_SQ".$child_subquery_idx."_alias1" ; } |
684
{ "C_SQ".$child_subquery_idx."_alias1" ; } | { "C_SQ".$child_subquery_idx."_alias2" ; } ;
687
COUNT( distinct | SUM( distinct | MIN( distinct | MAX( distinct ;
689
################################################################################
690
# The following rules are for writing more sensible queries - that we don't #
691
# reference tables / fields that aren't present in the query and that we keep #
692
# track of what we have added. You shouldn't need to touch these ever #
693
################################################################################
695
_table AS { "alias".++$tables } | _table AS { "alias".++$tables } | _table AS { "alias".++$tables } |
696
( from_subquery ) AS { "alias".++$tables } ;
699
{ $subquery_idx += 1 ; $subquery_tables=0 ; ""} SELECT distinct select_option subquery_table_one_two . * subquery_body ;
701
subquery_new_table_item:
702
_table AS { "SQ".$subquery_idx."_alias".++$subquery_tables } ;
704
child_subquery_new_table_item:
705
_table AS { "C_SQ".$child_subquery_idx."_alias".++$child_subquery_tables } ;
710
subquery_current_table_item:
711
{ "SQ".$subquery_idx."_alias".$subquery_tables } ;
713
child_subquery_current_table_item:
714
{ "C_SQ".$child_subquery_idx."_alias".$child_subquery_tables } ;
717
{ "alias".($tables - 1) };
719
subquery_previous_table_item:
720
{ "SQ".$subquery_idx."_alias".($subquery_tables-1) } ;
722
child_subquery_previous_table_item:
723
{ "C_SQ".$child_subquery_idx."_alias".($child_subquery_tables-1) } ;
726
{ "alias".$prng->int(1,$tables) };
728
existing_subquery_table_item:
729
{ "SQ".$subquery_idx."_alias".$prng->int(1,$subquery_tables) } ;
731
existing_child_subquery_table_item:
732
{ "C_SQ".$child_subquery_idx."_alias".$prng->int(1,$child_subquery_tables) } ;
734
existing_select_item:
735
{ "field".$prng->int(1,$fields) };
737
################################################################################
738
# end of utility rules #
739
################################################################################
742
= | > | < | != | <> | <= | >= ;
746
arithmetic_operator all_any |
752
################################################################################
753
# Used for creating combo_items - ie (field1 + field2) AS fieldX #
754
# We ignore division to prevent division by zero errors #
755
################################################################################
759
################################################################################
760
# We stack AND to provide more interesting options for the optimizer #
761
# Alter these percentages at your own risk / look for coverage regressions #
762
# with --debug if you play with these. Those optimizations that require an #
763
# OR-only list in the WHERE clause are specifically stacked in another rule #
764
################################################################################
770
| | | ALL | DISTINCT ;
774
_digit | _digit | _digit | _digit | _tinyint_unsigned|
775
_char(1) | _char(1) | _char(1) | _char(2) | _char(2) | 'USA' ;
778
A | B | C | BB | CC | B | C | BB | CC |
779
CC | CC | CC | CC | CC |
780
C | C | C | C | C | D | view ;
782
################################################################################
783
# Add a possibility for 'view' to occur at the end of the previous '_table' rule
784
# to allow a chance to use views (when running the RQG with --views)
785
################################################################################
788
view_A | view_AA | view_B | view_BB | view_C | view_CC | view_C | view_CC | view_D ;
791
int_field_name | char_field_name ;
794
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | _tinyint_unsigned ;
797
`pk` | `col_int_key` | `col_int_nokey` ;
800
`pk` | `col_int_key` ;
804
`col_varchar_key` | `col_varchar_nokey` ;
806
################################################################################
807
# We define LIMIT_rows in this fashion as LIMIT values can differ depending on #
808
# how large the LIMIT is - LIMIT 2 = LIMIT 9 != LIMIT 19 #
809
################################################################################
812
1 | 2 | 10 | 100 | 1000;
added
removed
tests/kewpie/randgen/conf/optimizer/optimizer_subquery.yy
