summaryrefslogtreecommitdiffstats
path: root/tests/dialects/test_mysql.py
blob: 3a3e49ed291dfbe76d692a817b71798adf82174f (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
from sqlglot import expressions as exp
from tests.dialects.test_dialect import Validator


class TestMySQL(Validator):
    dialect = "mysql"

    def test_ddl(self):
        int_types = {"BIGINT", "INT", "MEDIUMINT", "SMALLINT", "TINYINT"}

        for t in int_types:
            self.validate_identity(f"CREATE TABLE t (id {t} UNSIGNED)")
            self.validate_identity(f"CREATE TABLE t (id {t}(10) UNSIGNED)")

        self.validate_identity("CREATE TABLE t (id DECIMAL(20, 4) UNSIGNED)")

        self.validate_all(
            "CREATE TABLE t (id INT UNSIGNED)",
            write={
                "duckdb": "CREATE TABLE t (id UINTEGER)",
            },
        )

        self.validate_identity("CREATE TABLE foo (a BIGINT, UNIQUE (b) USING BTREE)")
        self.validate_identity("CREATE TABLE foo (id BIGINT)")
        self.validate_identity("CREATE TABLE 00f (1d BIGINT)")
        self.validate_identity("UPDATE items SET items.price = 0 WHERE items.id >= 5 LIMIT 10")
        self.validate_identity("DELETE FROM t WHERE a <= 10 LIMIT 10")
        self.validate_identity("CREATE TABLE foo (a BIGINT, INDEX USING BTREE (b))")
        self.validate_identity("CREATE TABLE foo (a BIGINT, FULLTEXT INDEX (b))")
        self.validate_identity("CREATE TABLE foo (a BIGINT, SPATIAL INDEX (b))")
        self.validate_identity(
            "CREATE TABLE `oauth_consumer` (`key` VARCHAR(32) NOT NULL, UNIQUE `OAUTH_CONSUMER_KEY` (`key`))"
        )
        self.validate_identity(
            "CREATE TABLE `x` (`username` VARCHAR(200), PRIMARY KEY (`username`(16)))"
        )
        self.validate_identity(
            "UPDATE items SET items.price = 0 WHERE items.id >= 5 ORDER BY items.id LIMIT 10"
        )
        self.validate_identity(
            "CREATE TABLE foo (a BIGINT, INDEX b USING HASH (c) COMMENT 'd' VISIBLE ENGINE_ATTRIBUTE = 'e' WITH PARSER foo)"
        )
        self.validate_identity(
            "DELETE t1 FROM t1 LEFT JOIN t2 ON t1.id = t2.id WHERE t2.id IS NULL"
        )
        self.validate_identity(
            "DELETE t1, t2 FROM t1 INNER JOIN t2 INNER JOIN t3 WHERE t1.id = t2.id AND t2.id = t3.id"
        )
        self.validate_identity(
            "DELETE FROM t1, t2 USING t1 INNER JOIN t2 INNER JOIN t3 WHERE t1.id = t2.id AND t2.id = t3.id"
        )
        self.validate_identity(
            "INSERT IGNORE INTO subscribers (email) VALUES ('john.doe@gmail.com'), ('jane.smith@ibm.com')"
        )
        self.validate_identity(
            "INSERT INTO t1 (a, b, c) VALUES (1, 2, 3), (4, 5, 6) ON DUPLICATE KEY UPDATE c = VALUES(a) + VALUES(b)"
        )
        self.validate_identity(
            "INSERT INTO t1 (a, b) SELECT c, d FROM t2 UNION SELECT e, f FROM t3 ON DUPLICATE KEY UPDATE b = b + c"
        )
        self.validate_identity(
            "INSERT INTO t1 (a, b, c) VALUES (1, 2, 3) ON DUPLICATE KEY UPDATE c = c + 1"
        )
        self.validate_identity(
            "INSERT INTO x VALUES (1, 'a', 2.0) ON DUPLICATE KEY UPDATE x.id = 1"
        )
        self.validate_identity(
            "CREATE OR REPLACE VIEW my_view AS SELECT column1 AS `boo`, column2 AS `foo` FROM my_table WHERE column3 = 'some_value' UNION SELECT q.* FROM fruits_table, JSON_TABLE(Fruits, '$[*]' COLUMNS(id VARCHAR(255) PATH '$.$id', value VARCHAR(255) PATH '$.value')) AS q",
        )

        self.validate_all(
            "CREATE TABLE z (a INT) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARACTER SET=utf8 COLLATE=utf8_bin COMMENT='x'",
            write={
                "duckdb": "CREATE TABLE z (a INT)",
                "mysql": "CREATE TABLE z (a INT) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARACTER SET=utf8 COLLATE=utf8_bin COMMENT='x'",
                "spark": "CREATE TABLE z (a INT) COMMENT 'x'",
                "sqlite": "CREATE TABLE z (a INTEGER)",
            },
        )
        self.validate_all(
            "CREATE TABLE t (c DATETIME DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP) DEFAULT CHARSET=utf8 ROW_FORMAT=DYNAMIC",
            write={
                "mysql": "CREATE TABLE t (c DATETIME DEFAULT CURRENT_TIMESTAMP() ON UPDATE CURRENT_TIMESTAMP()) DEFAULT CHARACTER SET=utf8 ROW_FORMAT=DYNAMIC",
            },
        )
        self.validate_all(
            "CREATE TABLE x (id int not null auto_increment, primary key (id))",
            write={
                "sqlite": "CREATE TABLE x (id INTEGER NOT NULL AUTOINCREMENT PRIMARY KEY)",
            },
        )
        self.validate_all(
            "CREATE TABLE x (id int not null auto_increment)",
            write={
                "sqlite": "CREATE TABLE x (id INTEGER NOT NULL)",
            },
        )
        self.validate_all(
            "CREATE TABLE `foo` (`id` char(36) NOT NULL DEFAULT (uuid()), PRIMARY KEY (`id`), UNIQUE KEY `id` (`id`))",
            write={
                "mysql": "CREATE TABLE `foo` (`id` CHAR(36) NOT NULL DEFAULT (UUID()), PRIMARY KEY (`id`), UNIQUE `id` (`id`))",
            },
        )
        self.validate_all(
            "CREATE TABLE IF NOT EXISTS industry_info (a BIGINT(20) NOT NULL AUTO_INCREMENT, b BIGINT(20) NOT NULL, c VARCHAR(1000), PRIMARY KEY (a), UNIQUE KEY d (b), KEY e (b))",
            write={
                "mysql": "CREATE TABLE IF NOT EXISTS industry_info (a BIGINT(20) NOT NULL AUTO_INCREMENT, b BIGINT(20) NOT NULL, c VARCHAR(1000), PRIMARY KEY (a), UNIQUE d (b), INDEX e (b))",
            },
        )
        self.validate_all(
            "CREATE TABLE test (ts TIMESTAMP, ts_tz TIMESTAMPTZ, ts_ltz TIMESTAMPLTZ)",
            write={
                "mysql": "CREATE TABLE test (ts DATETIME, ts_tz TIMESTAMP, ts_ltz TIMESTAMP)",
            },
        )
        self.validate_all(
            "ALTER TABLE test_table ALTER COLUMN test_column SET DATA TYPE LONGTEXT",
            write={
                "mysql": "ALTER TABLE test_table MODIFY COLUMN test_column LONGTEXT",
            },
        )
        self.validate_identity("ALTER TABLE test_table ALTER COLUMN test_column SET DEFAULT 1")

    def test_identity(self):
        self.validate_identity("SELECT DATE_FORMAT(NOW(), '%Y-%m-%d %H:%i:00.0000')")
        self.validate_identity("SELECT @var1 := 1, @var2")
        self.validate_identity("UNLOCK TABLES")
        self.validate_identity("LOCK TABLES `app_fields` WRITE", check_command_warning=True)
        self.validate_identity("SELECT 1 XOR 0")
        self.validate_identity("SELECT 1 && 0", "SELECT 1 AND 0")
        self.validate_identity("SELECT /*+ BKA(t1) NO_BKA(t2) */ * FROM t1 INNER JOIN t2")
        self.validate_identity("SELECT /*+ MERGE(dt) */ * FROM (SELECT * FROM t1) AS dt")
        self.validate_identity("SELECT /*+ INDEX(t, i) */ c1 FROM t WHERE c2 = 'value'")
        self.validate_identity("SELECT @a MEMBER OF(@c), @b MEMBER OF(@c)")
        self.validate_identity("SELECT JSON_ARRAY(4, 5) MEMBER OF('[[3,4],[4,5]]')")
        self.validate_identity("SELECT CAST('[4,5]' AS JSON) MEMBER OF('[[3,4],[4,5]]')")
        self.validate_identity("""SELECT 'ab' MEMBER OF('[23, "abc", 17, "ab", 10]')""")
        self.validate_identity("""SELECT * FROM foo WHERE 'ab' MEMBER OF(content)""")
        self.validate_identity("CAST(x AS ENUM('a', 'b'))")
        self.validate_identity("CAST(x AS SET('a', 'b'))")
        self.validate_identity("SELECT CURRENT_TIMESTAMP(6)")
        self.validate_identity("x ->> '$.name'")
        self.validate_identity("SELECT CAST(`a`.`b` AS CHAR) FROM foo")
        self.validate_identity("SELECT TRIM(LEADING 'bla' FROM ' XXX ')")
        self.validate_identity("SELECT TRIM(TRAILING 'bla' FROM ' XXX ')")
        self.validate_identity("SELECT TRIM(BOTH 'bla' FROM ' XXX ')")
        self.validate_identity("SELECT TRIM('bla' FROM ' XXX ')")
        self.validate_identity("@@GLOBAL.max_connections")
        self.validate_identity("CREATE TABLE A LIKE B")
        self.validate_identity("SELECT * FROM t1, t2 FOR SHARE OF t1, t2 SKIP LOCKED")
        self.validate_identity("SELECT a || b", "SELECT a OR b")
        self.validate_identity(
            "SELECT * FROM x ORDER BY BINARY a", "SELECT * FROM x ORDER BY CAST(a AS BINARY)"
        )
        self.validate_identity(
            """SELECT * FROM foo WHERE 3 MEMBER OF(JSON_EXTRACT(info, '$.value'))"""
        )
        self.validate_identity(
            "SELECT * FROM t1, t2, t3 FOR SHARE OF t1 NOWAIT FOR UPDATE OF t2, t3 SKIP LOCKED"
        )
        self.validate_identity(
            """SELECT * FROM foo WHERE 3 MEMBER OF(info->'$.value')""",
            """SELECT * FROM foo WHERE 3 MEMBER OF(JSON_EXTRACT(info, '$.value'))""",
        )

        # Index hints
        self.validate_identity(
            "SELECT * FROM table1 USE INDEX (col1_index, col2_index) WHERE col1 = 1 AND col2 = 2 AND col3 = 3"
        )
        self.validate_identity(
            "SELECT * FROM table1 IGNORE INDEX (col3_index) WHERE col1 = 1 AND col2 = 2 AND col3 = 3"
        )
        self.validate_identity(
            "SELECT * FROM t1 USE INDEX (i1) IGNORE INDEX FOR ORDER BY (i2) ORDER BY a"
        )
        self.validate_identity("SELECT * FROM t1 USE INDEX (i1) USE INDEX (i1, i1)")
        self.validate_identity("SELECT * FROM t1 USE INDEX FOR JOIN (i1) FORCE INDEX FOR JOIN (i2)")
        self.validate_identity(
            "SELECT * FROM t1 USE INDEX () IGNORE INDEX (i2) USE INDEX (i1) USE INDEX (i2)"
        )

        # SET Commands
        self.validate_identity("SET @var_name = expr")
        self.validate_identity("SET @name = 43")
        self.validate_identity("SET @total_tax = (SELECT SUM(tax) FROM taxable_transactions)")
        self.validate_identity("SET GLOBAL max_connections = 1000")
        self.validate_identity("SET @@GLOBAL.max_connections = 1000")
        self.validate_identity("SET SESSION sql_mode = 'TRADITIONAL'")
        self.validate_identity("SET LOCAL sql_mode = 'TRADITIONAL'")
        self.validate_identity("SET @@SESSION.sql_mode = 'TRADITIONAL'")
        self.validate_identity("SET @@LOCAL.sql_mode = 'TRADITIONAL'")
        self.validate_identity("SET @@sql_mode = 'TRADITIONAL'")
        self.validate_identity("SET sql_mode = 'TRADITIONAL'")
        self.validate_identity("SET PERSIST max_connections = 1000")
        self.validate_identity("SET @@PERSIST.max_connections = 1000")
        self.validate_identity("SET PERSIST_ONLY back_log = 100")
        self.validate_identity("SET @@PERSIST_ONLY.back_log = 100")
        self.validate_identity("SET @@SESSION.max_join_size = DEFAULT")
        self.validate_identity("SET @@SESSION.max_join_size = @@GLOBAL.max_join_size")
        self.validate_identity("SET @x = 1, SESSION sql_mode = ''")
        self.validate_identity("SET GLOBAL max_connections = 1000, sort_buffer_size = 1000000")
        self.validate_identity("SET @@GLOBAL.sort_buffer_size = 50000, sort_buffer_size = 1000000")
        self.validate_identity("SET CHARACTER SET 'utf8'")
        self.validate_identity("SET CHARACTER SET utf8")
        self.validate_identity("SET CHARACTER SET DEFAULT")
        self.validate_identity("SET NAMES 'utf8'")
        self.validate_identity("SET NAMES DEFAULT")
        self.validate_identity("SET NAMES 'utf8' COLLATE 'utf8_unicode_ci'")
        self.validate_identity("SET NAMES utf8 COLLATE utf8_unicode_ci")
        self.validate_identity("SET autocommit = ON")
        self.validate_identity("SET GLOBAL TRANSACTION ISOLATION LEVEL SERIALIZABLE")
        self.validate_identity("SET TRANSACTION READ ONLY")
        self.validate_identity("SET GLOBAL TRANSACTION ISOLATION LEVEL REPEATABLE READ, READ WRITE")
        self.validate_identity("SELECT SCHEMA()")
        self.validate_identity("SELECT DATABASE()")
        self.validate_identity(
            "SET GLOBAL sort_buffer_size = 1000000, SESSION sort_buffer_size = 1000000"
        )
        self.validate_identity(
            "SET @@GLOBAL.sort_buffer_size = 1000000, @@LOCAL.sort_buffer_size = 1000000"
        )
        self.validate_identity("INTERVAL '1' YEAR")
        self.validate_identity("DATE_ADD(x, INTERVAL 1 YEAR)")
        self.validate_identity("CHAR(0)")
        self.validate_identity("CHAR(77, 121, 83, 81, '76')")
        self.validate_identity("CHAR(77, 77.3, '77.3' USING utf8mb4)")

    def test_types(self):
        self.validate_identity("CAST(x AS MEDIUMINT) + CAST(y AS YEAR(4))")

        self.validate_all(
            "CAST(x AS MEDIUMTEXT) + CAST(y AS LONGTEXT) + CAST(z AS TINYTEXT)",
            read={
                "mysql": "CAST(x AS MEDIUMTEXT) + CAST(y AS LONGTEXT) + CAST(z AS TINYTEXT)",
            },
            write={
                "spark": "CAST(x AS TEXT) + CAST(y AS TEXT) + CAST(z AS TEXT)",
            },
        )
        self.validate_all(
            "CAST(x AS MEDIUMBLOB) + CAST(y AS LONGBLOB) + CAST(z AS TINYBLOB)",
            read={
                "mysql": "CAST(x AS MEDIUMBLOB) + CAST(y AS LONGBLOB) + CAST(z AS TINYBLOB)",
            },
            write={
                "spark": "CAST(x AS BLOB) + CAST(y AS BLOB) + CAST(z AS BLOB)",
            },
        )
        self.validate_all("CAST(x AS TIMESTAMP)", write={"mysql": "CAST(x AS DATETIME)"})
        self.validate_all("CAST(x AS TIMESTAMPTZ)", write={"mysql": "TIMESTAMP(x)"})
        self.validate_all("CAST(x AS TIMESTAMPLTZ)", write={"mysql": "TIMESTAMP(x)"})

    def test_canonical_functions(self):
        self.validate_identity("SELECT LEFT('str', 2)", "SELECT LEFT('str', 2)")
        self.validate_identity("SELECT INSTR('str', 'substr')", "SELECT LOCATE('substr', 'str')")
        self.validate_identity("SELECT UCASE('foo')", "SELECT UPPER('foo')")
        self.validate_identity("SELECT LCASE('foo')", "SELECT LOWER('foo')")
        self.validate_identity(
            "SELECT DAY_OF_MONTH('2023-01-01')", "SELECT DAYOFMONTH('2023-01-01')"
        )
        self.validate_identity("SELECT DAY_OF_WEEK('2023-01-01')", "SELECT DAYOFWEEK('2023-01-01')")
        self.validate_identity("SELECT DAY_OF_YEAR('2023-01-01')", "SELECT DAYOFYEAR('2023-01-01')")
        self.validate_identity(
            "SELECT WEEK_OF_YEAR('2023-01-01')", "SELECT WEEKOFYEAR('2023-01-01')"
        )
        self.validate_all(
            "CHAR(10)",
            write={
                "mysql": "CHAR(10)",
                "presto": "CHR(10)",
            },
        )

    def test_escape(self):
        self.validate_identity("""'"abc"'""")
        self.validate_identity(
            r"'\'a'",
            "'''a'",
        )
        self.validate_identity(
            '''"'abc'"''',
            "'''abc'''",
        )
        self.validate_all(
            r"'a \' b '' '",
            write={
                "mysql": r"'a '' b '' '",
                "spark": r"'a \' b \' '",
            },
        )

    def test_introducers(self):
        self.validate_all(
            "_utf8mb4 'hola'",
            read={
                "mysql": "_utf8mb4'hola'",
            },
            write={
                "mysql": "_utf8mb4 'hola'",
            },
        )
        self.validate_all(
            "N'some text'",
            read={
                "mysql": "n'some text'",
            },
            write={
                "mysql": "N'some text'",
            },
        )
        self.validate_all(
            "_latin1 x'4D7953514C'",
            read={
                "mysql": "_latin1 X'4D7953514C'",
            },
            write={
                "mysql": "_latin1 x'4D7953514C'",
            },
        )

    def test_hexadecimal_literal(self):
        write_CC = {
            "bigquery": "SELECT 0xCC",
            "clickhouse": "SELECT 0xCC",
            "databricks": "SELECT 204",
            "drill": "SELECT 204",
            "duckdb": "SELECT 204",
            "hive": "SELECT 204",
            "mysql": "SELECT x'CC'",
            "oracle": "SELECT 204",
            "postgres": "SELECT x'CC'",
            "presto": "SELECT 204",
            "redshift": "SELECT 204",
            "snowflake": "SELECT x'CC'",
            "spark": "SELECT X'CC'",
            "sqlite": "SELECT x'CC'",
            "starrocks": "SELECT x'CC'",
            "tableau": "SELECT 204",
            "teradata": "SELECT 204",
            "trino": "SELECT X'CC'",
            "tsql": "SELECT 0xCC",
        }
        write_CC_with_leading_zeros = {
            "bigquery": "SELECT 0x0000CC",
            "clickhouse": "SELECT 0x0000CC",
            "databricks": "SELECT 204",
            "drill": "SELECT 204",
            "duckdb": "SELECT 204",
            "hive": "SELECT 204",
            "mysql": "SELECT x'0000CC'",
            "oracle": "SELECT 204",
            "postgres": "SELECT x'0000CC'",
            "presto": "SELECT 204",
            "redshift": "SELECT 204",
            "snowflake": "SELECT x'0000CC'",
            "spark": "SELECT X'0000CC'",
            "sqlite": "SELECT x'0000CC'",
            "starrocks": "SELECT x'0000CC'",
            "tableau": "SELECT 204",
            "teradata": "SELECT 204",
            "trino": "SELECT X'0000CC'",
            "tsql": "SELECT 0x0000CC",
        }

        self.validate_all("SELECT X'1A'", write={"mysql": "SELECT x'1A'"})
        self.validate_all("SELECT 0xz", write={"mysql": "SELECT `0xz`"})
        self.validate_all("SELECT 0xCC", write=write_CC)
        self.validate_all("SELECT 0xCC ", write=write_CC)
        self.validate_all("SELECT x'CC'", write=write_CC)
        self.validate_all("SELECT 0x0000CC", write=write_CC_with_leading_zeros)
        self.validate_all("SELECT x'0000CC'", write=write_CC_with_leading_zeros)

    def test_bits_literal(self):
        write_1011 = {
            "bigquery": "SELECT 11",
            "clickhouse": "SELECT 0b1011",
            "databricks": "SELECT 11",
            "drill": "SELECT 11",
            "hive": "SELECT 11",
            "mysql": "SELECT b'1011'",
            "oracle": "SELECT 11",
            "postgres": "SELECT b'1011'",
            "presto": "SELECT 11",
            "redshift": "SELECT 11",
            "snowflake": "SELECT 11",
            "spark": "SELECT 11",
            "sqlite": "SELECT 11",
            "mysql": "SELECT b'1011'",
            "tableau": "SELECT 11",
            "teradata": "SELECT 11",
            "trino": "SELECT 11",
            "tsql": "SELECT 11",
        }

        self.validate_all("SELECT 0b1011", write=write_1011)
        self.validate_all("SELECT b'1011'", write=write_1011)

    def test_string_literals(self):
        self.validate_all(
            'SELECT "2021-01-01" + INTERVAL 1 MONTH',
            write={
                "mysql": "SELECT '2021-01-01' + INTERVAL '1' MONTH",
            },
        )

    def test_convert(self):
        self.validate_all(
            "CONVERT(x USING latin1)",
            write={
                "mysql": "CAST(x AS CHAR CHARACTER SET latin1)",
            },
        )
        self.validate_all(
            "CAST(x AS CHAR CHARACTER SET latin1)",
            write={
                "mysql": "CAST(x AS CHAR CHARACTER SET latin1)",
            },
        )

    def test_match_against(self):
        self.validate_all(
            "MATCH(col1, col2, col3) AGAINST('abc')",
            read={
                "": "MATCH(col1, col2, col3) AGAINST('abc')",
                "mysql": "MATCH(col1, col2, col3) AGAINST('abc')",
            },
            write={
                "": "MATCH(col1, col2, col3) AGAINST('abc')",
                "mysql": "MATCH(col1, col2, col3) AGAINST('abc')",
                "postgres": "(col1 @@ 'abc' OR col2 @@ 'abc' OR col3 @@ 'abc')",  # not quite correct because it's not ts_query
            },
        )
        self.validate_all(
            "MATCH(col1, col2) AGAINST('abc' IN NATURAL LANGUAGE MODE)",
            write={"mysql": "MATCH(col1, col2) AGAINST('abc' IN NATURAL LANGUAGE MODE)"},
        )
        self.validate_all(
            "MATCH(col1, col2) AGAINST('abc' IN NATURAL LANGUAGE MODE WITH QUERY EXPANSION)",
            write={
                "mysql": "MATCH(col1, col2) AGAINST('abc' IN NATURAL LANGUAGE MODE WITH QUERY EXPANSION)"
            },
        )
        self.validate_all(
            "MATCH(col1, col2) AGAINST('abc' IN BOOLEAN MODE)",
            write={"mysql": "MATCH(col1, col2) AGAINST('abc' IN BOOLEAN MODE)"},
        )
        self.validate_all(
            "MATCH(col1, col2) AGAINST('abc' WITH QUERY EXPANSION)",
            write={"mysql": "MATCH(col1, col2) AGAINST('abc' WITH QUERY EXPANSION)"},
        )
        self.validate_all(
            "MATCH(a.b) AGAINST('abc')",
            write={"mysql": "MATCH(a.b) AGAINST('abc')"},
        )

    def test_date_format(self):
        self.validate_all(
            "SELECT DATE_FORMAT('2017-06-15', '%Y')",
            write={
                "mysql": "SELECT DATE_FORMAT('2017-06-15', '%Y')",
                "snowflake": "SELECT TO_CHAR(CAST('2017-06-15' AS TIMESTAMPNTZ), 'yyyy')",
            },
        )
        self.validate_all(
            "SELECT DATE_FORMAT('2017-06-15', '%m')",
            write={
                "mysql": "SELECT DATE_FORMAT('2017-06-15', '%m')",
                "snowflake": "SELECT TO_CHAR(CAST('2017-06-15' AS TIMESTAMPNTZ), 'mm')",
            },
        )
        self.validate_all(
            "SELECT DATE_FORMAT('2017-06-15', '%d')",
            write={
                "mysql": "SELECT DATE_FORMAT('2017-06-15', '%d')",
                "snowflake": "SELECT TO_CHAR(CAST('2017-06-15' AS TIMESTAMPNTZ), 'DD')",
            },
        )
        self.validate_all(
            "SELECT DATE_FORMAT('2017-06-15', '%Y-%m-%d')",
            write={
                "mysql": "SELECT DATE_FORMAT('2017-06-15', '%Y-%m-%d')",
                "snowflake": "SELECT TO_CHAR(CAST('2017-06-15' AS TIMESTAMPNTZ), 'yyyy-mm-DD')",
            },
        )
        self.validate_all(
            "SELECT DATE_FORMAT('2017-06-15 22:23:34', '%H')",
            write={
                "mysql": "SELECT DATE_FORMAT('2017-06-15 22:23:34', '%H')",
                "snowflake": "SELECT TO_CHAR(CAST('2017-06-15 22:23:34' AS TIMESTAMPNTZ), 'hh24')",
            },
        )
        self.validate_all(
            "SELECT DATE_FORMAT('2017-06-15', '%w')",
            write={
                "mysql": "SELECT DATE_FORMAT('2017-06-15', '%w')",
                "snowflake": "SELECT TO_CHAR(CAST('2017-06-15' AS TIMESTAMPNTZ), 'dy')",
            },
        )
        self.validate_all(
            "SELECT DATE_FORMAT('2009-10-04 22:23:00', '%W %M %Y')",
            write={
                "mysql": "SELECT DATE_FORMAT('2009-10-04 22:23:00', '%W %M %Y')",
                "snowflake": "SELECT TO_CHAR(CAST('2009-10-04 22:23:00' AS TIMESTAMPNTZ), 'DY mmmm yyyy')",
            },
        )
        self.validate_all(
            "SELECT DATE_FORMAT('2007-10-04 22:23:00', '%H:%i:%s')",
            write={
                "mysql": "SELECT DATE_FORMAT('2007-10-04 22:23:00', '%T')",
                "snowflake": "SELECT TO_CHAR(CAST('2007-10-04 22:23:00' AS TIMESTAMPNTZ), 'hh24:mi:ss')",
            },
        )
        self.validate_all(
            "SELECT DATE_FORMAT('1900-10-04 22:23:00', '%d %y %a %d %m %b')",
            write={
                "mysql": "SELECT DATE_FORMAT('1900-10-04 22:23:00', '%d %y %W %d %m %b')",
                "snowflake": "SELECT TO_CHAR(CAST('1900-10-04 22:23:00' AS TIMESTAMPNTZ), 'DD yy DY DD mm mon')",
            },
        )

    def test_mysql_time(self):
        self.validate_identity("FROM_UNIXTIME(a, b)")
        self.validate_identity("FROM_UNIXTIME(a, b, c)")
        self.validate_identity("TIME_STR_TO_UNIX(x)", "UNIX_TIMESTAMP(x)")
        self.validate_all(
            "SELECT TO_DAYS(x)",
            write={
                "mysql": "SELECT (DATEDIFF(x, '0000-01-01') + 1)",
                "presto": "SELECT (DATE_DIFF('DAY', CAST(CAST('0000-01-01' AS TIMESTAMP) AS DATE), CAST(CAST(x AS TIMESTAMP) AS DATE)) + 1)",
            },
        )
        self.validate_all(
            "SELECT DATEDIFF(x, y)",
            read={
                "presto": "SELECT DATE_DIFF('DAY', y, x)",
                "redshift": "SELECT DATEDIFF(DAY, y, x)",
            },
            write={
                "mysql": "SELECT DATEDIFF(x, y)",
                "presto": "SELECT DATE_DIFF('DAY', y, x)",
                "redshift": "SELECT DATEDIFF(DAY, y, x)",
            },
        )
        self.validate_all(
            "DAYOFYEAR(x)",
            write={
                "mysql": "DAYOFYEAR(x)",
                "": "DAY_OF_YEAR(CAST(x AS DATE))",
            },
        )
        self.validate_all(
            "DAYOFMONTH(x)",
            write={"mysql": "DAYOFMONTH(x)", "": "DAY_OF_MONTH(CAST(x AS DATE))"},
        )
        self.validate_all(
            "DAYOFWEEK(x)",
            write={"mysql": "DAYOFWEEK(x)", "": "DAY_OF_WEEK(CAST(x AS DATE))"},
        )
        self.validate_all(
            "WEEKOFYEAR(x)",
            write={"mysql": "WEEKOFYEAR(x)", "": "WEEK_OF_YEAR(CAST(x AS DATE))"},
        )
        self.validate_all(
            "DAY(x)",
            write={"mysql": "DAY(x)", "": "DAY(CAST(x AS DATE))"},
        )
        self.validate_all(
            "WEEK(x)",
            write={"mysql": "WEEK(x)", "": "WEEK(CAST(x AS DATE))"},
        )
        self.validate_all(
            "YEAR(x)",
            write={"mysql": "YEAR(x)", "": "YEAR(CAST(x AS DATE))"},
        )
        self.validate_all(
            "DATE(x)",
            read={"": "TS_OR_DS_TO_DATE(x)"},
        )
        self.validate_all(
            "STR_TO_DATE(x, '%M')",
            read={"": "TS_OR_DS_TO_DATE(x, '%B')"},
        )
        self.validate_all(
            "STR_TO_DATE(x, '%Y-%m-%d')",
            write={"presto": "CAST(DATE_PARSE(x, '%Y-%m-%d') AS DATE)"},
        )
        self.validate_all(
            "STR_TO_DATE(x, '%Y-%m-%dT%T')", write={"presto": "DATE_PARSE(x, '%Y-%m-%dT%T')"}
        )

    def test_mysql(self):
        self.validate_all(
            "SELECT * FROM x LEFT JOIN y ON x.id = y.id UNION SELECT * FROM x RIGHT JOIN y ON x.id = y.id LIMIT 0",
            read={
                "postgres": "SELECT * FROM x FULL JOIN y ON x.id = y.id LIMIT 0",
            },
        )
        self.validate_all(
            # MySQL doesn't support FULL OUTER joins
            "WITH t1 AS (SELECT 1) SELECT * FROM t1 LEFT OUTER JOIN t2 ON t1.x = t2.x UNION SELECT * FROM t1 RIGHT OUTER JOIN t2 ON t1.x = t2.x",
            read={
                "postgres": "WITH t1 AS (SELECT 1) SELECT * FROM t1 FULL OUTER JOIN t2 ON t1.x = t2.x",
            },
        )
        self.validate_all(
            "a XOR b",
            read={
                "mysql": "a XOR b",
                "snowflake": "BOOLXOR(a, b)",
            },
            write={
                "duckdb": "(a AND (NOT b)) OR ((NOT a) AND b)",
                "mysql": "a XOR b",
                "postgres": "(a AND (NOT b)) OR ((NOT a) AND b)",
                "snowflake": "BOOLXOR(a, b)",
                "trino": "(a AND (NOT b)) OR ((NOT a) AND b)",
            },
        )

        self.validate_all(
            "SELECT * FROM test LIMIT 0 + 1, 0 + 1",
            write={
                "mysql": "SELECT * FROM test LIMIT 1 OFFSET 1",
                "postgres": "SELECT * FROM test LIMIT 0 + 1 OFFSET 0 + 1",
                "presto": "SELECT * FROM test OFFSET 1 LIMIT 1",
                "snowflake": "SELECT * FROM test LIMIT 1 OFFSET 1",
                "trino": "SELECT * FROM test OFFSET 1 LIMIT 1",
                "bigquery": "SELECT * FROM test LIMIT 1 OFFSET 1",
            },
        )
        self.validate_all(
            "CAST(x AS TEXT)",
            write={
                "mysql": "CAST(x AS CHAR)",
                "presto": "CAST(x AS VARCHAR)",
                "starrocks": "CAST(x AS STRING)",
            },
        )
        self.validate_all("CAST(x AS SIGNED)", write={"mysql": "CAST(x AS SIGNED)"})
        self.validate_all("CAST(x AS SIGNED INTEGER)", write={"mysql": "CAST(x AS SIGNED)"})
        self.validate_all("CAST(x AS UNSIGNED)", write={"mysql": "CAST(x AS UNSIGNED)"})
        self.validate_all("CAST(x AS UNSIGNED INTEGER)", write={"mysql": "CAST(x AS UNSIGNED)"})
        self.validate_all("TIME_STR_TO_TIME(x)", write={"mysql": "CAST(x AS DATETIME)"})
        self.validate_all(
            """SELECT 17 MEMBER OF('[23, "abc", 17, "ab", 10]')""",
            write={
                "": """SELECT JSON_ARRAY_CONTAINS(17, '[23, "abc", 17, "ab", 10]')""",
                "mysql": """SELECT 17 MEMBER OF('[23, "abc", 17, "ab", 10]')""",
            },
        )
        self.validate_all(
            "SELECT DATE_ADD('2023-06-23 12:00:00', INTERVAL 2 * 2 MONTH) FROM foo",
            write={
                "mysql": "SELECT DATE_ADD('2023-06-23 12:00:00', INTERVAL (2 * 2) MONTH) FROM foo",
            },
        )
        self.validate_all(
            "SELECT * FROM t LOCK IN SHARE MODE", write={"mysql": "SELECT * FROM t FOR SHARE"}
        )
        self.validate_all(
            "SELECT DATE(DATE_SUB(`dt`, INTERVAL DAYOFMONTH(`dt`) - 1 DAY)) AS __timestamp FROM tableT",
            write={
                "mysql": "SELECT DATE(DATE_SUB(`dt`, INTERVAL (DAYOFMONTH(`dt`) - 1) DAY)) AS __timestamp FROM tableT",
            },
        )
        self.validate_identity("SELECT name FROM temp WHERE name = ? FOR UPDATE")
        self.validate_all(
            "SELECT a FROM tbl FOR UPDATE",
            write={
                "": "SELECT a FROM tbl",
                "mysql": "SELECT a FROM tbl FOR UPDATE",
                "oracle": "SELECT a FROM tbl FOR UPDATE",
                "postgres": "SELECT a FROM tbl FOR UPDATE",
                "redshift": "SELECT a FROM tbl",
                "tsql": "SELECT a FROM tbl",
            },
        )
        self.validate_all(
            "SELECT a FROM tbl FOR SHARE",
            write={
                "": "SELECT a FROM tbl",
                "mysql": "SELECT a FROM tbl FOR SHARE",
                "oracle": "SELECT a FROM tbl FOR SHARE",
                "postgres": "SELECT a FROM tbl FOR SHARE",
                "tsql": "SELECT a FROM tbl",
            },
        )
        self.validate_all(
            "GROUP_CONCAT(DISTINCT x ORDER BY y DESC)",
            write={
                "mysql": "GROUP_CONCAT(DISTINCT x ORDER BY y DESC SEPARATOR ',')",
                "sqlite": "GROUP_CONCAT(DISTINCT x)",
                "tsql": "STRING_AGG(x, ',') WITHIN GROUP (ORDER BY y DESC)",
                "postgres": "STRING_AGG(DISTINCT x, ',' ORDER BY y DESC NULLS LAST)",
            },
        )
        self.validate_all(
            "GROUP_CONCAT(x ORDER BY y SEPARATOR z)",
            write={
                "mysql": "GROUP_CONCAT(x ORDER BY y SEPARATOR z)",
                "sqlite": "GROUP_CONCAT(x, z)",
                "tsql": "STRING_AGG(x, z) WITHIN GROUP (ORDER BY y)",
                "postgres": "STRING_AGG(x, z ORDER BY y NULLS FIRST)",
            },
        )
        self.validate_all(
            "GROUP_CONCAT(DISTINCT x ORDER BY y DESC SEPARATOR '')",
            write={
                "mysql": "GROUP_CONCAT(DISTINCT x ORDER BY y DESC SEPARATOR '')",
                "sqlite": "GROUP_CONCAT(DISTINCT x, '')",
                "tsql": "STRING_AGG(x, '') WITHIN GROUP (ORDER BY y DESC)",
                "postgres": "STRING_AGG(DISTINCT x, '' ORDER BY y DESC NULLS LAST)",
            },
        )
        self.validate_identity(
            "CREATE TABLE z (a INT) ENGINE=InnoDB AUTO_INCREMENT=1 CHARACTER SET=utf8 COLLATE=utf8_bin COMMENT='x'"
        )
        self.validate_identity(
            "CREATE TABLE z (a INT) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARACTER SET=utf8 COLLATE=utf8_bin COMMENT='x'"
        )
        self.validate_identity(
            "CREATE TABLE z (a INT DEFAULT NULL, PRIMARY KEY (a)) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARACTER SET=utf8 COLLATE=utf8_bin COMMENT='x'"
        )

        self.validate_all(
            """
            CREATE TABLE `t_customer_account` (
              `id` int(11) NOT NULL AUTO_INCREMENT,
              `customer_id` int(11) DEFAULT NULL COMMENT '客户id',
              `bank` varchar(100) COLLATE utf8_bin DEFAULT NULL COMMENT '行别',
              `account_no` varchar(100) COLLATE utf8_bin DEFAULT NULL COMMENT '账号',
              PRIMARY KEY (`id`)
            ) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARACTER SET=utf8 COLLATE=utf8_bin COMMENT='客户账户表'
            """,
            write={
                "mysql": """CREATE TABLE `t_customer_account` (
  `id` INT(11) NOT NULL AUTO_INCREMENT,
  `customer_id` INT(11) DEFAULT NULL COMMENT '客户id',
  `bank` VARCHAR(100) COLLATE utf8_bin DEFAULT NULL COMMENT '行别',
  `account_no` VARCHAR(100) COLLATE utf8_bin DEFAULT NULL COMMENT '账号',
  PRIMARY KEY (`id`)
)
ENGINE=InnoDB
AUTO_INCREMENT=1
DEFAULT CHARACTER SET=utf8
COLLATE=utf8_bin
COMMENT='客户账户表'"""
            },
            pretty=True,
        )

    def test_show_simple(self):
        for key, write_key in [
            ("BINARY LOGS", "BINARY LOGS"),
            ("MASTER LOGS", "BINARY LOGS"),
            ("STORAGE ENGINES", "ENGINES"),
            ("ENGINES", "ENGINES"),
            ("EVENTS", "EVENTS"),
            ("MASTER STATUS", "MASTER STATUS"),
            ("PLUGINS", "PLUGINS"),
            ("PRIVILEGES", "PRIVILEGES"),
            ("PROFILES", "PROFILES"),
            ("REPLICAS", "REPLICAS"),
            ("SLAVE HOSTS", "REPLICAS"),
        ]:
            show = self.validate_identity(f"SHOW {key}", f"SHOW {write_key}")
            self.assertIsInstance(show, exp.Show)
            self.assertEqual(show.name, write_key)

    def test_show_events(self):
        for key in ["BINLOG", "RELAYLOG"]:
            show = self.validate_identity(f"SHOW {key} EVENTS")
            self.assertIsInstance(show, exp.Show)
            self.assertEqual(show.name, f"{key} EVENTS")

            show = self.validate_identity(f"SHOW {key} EVENTS IN 'log' FROM 1 LIMIT 2, 3")
            self.assertEqual(show.text("log"), "log")
            self.assertEqual(show.text("position"), "1")
            self.assertEqual(show.text("limit"), "3")
            self.assertEqual(show.text("offset"), "2")

            show = self.validate_identity(f"SHOW {key} EVENTS LIMIT 1")
            self.assertEqual(show.text("limit"), "1")
            self.assertIsNone(show.args.get("offset"))

    def test_show_like_or_where(self):
        for key, write_key in [
            ("CHARSET", "CHARACTER SET"),
            ("CHARACTER SET", "CHARACTER SET"),
            ("COLLATION", "COLLATION"),
            ("DATABASES", "DATABASES"),
            ("FUNCTION STATUS", "FUNCTION STATUS"),
            ("PROCEDURE STATUS", "PROCEDURE STATUS"),
            ("GLOBAL STATUS", "GLOBAL STATUS"),
            ("SESSION STATUS", "STATUS"),
            ("STATUS", "STATUS"),
            ("GLOBAL VARIABLES", "GLOBAL VARIABLES"),
            ("SESSION VARIABLES", "VARIABLES"),
            ("VARIABLES", "VARIABLES"),
        ]:
            expected_name = write_key.strip("GLOBAL").strip()
            template = "SHOW {}"
            show = self.validate_identity(template.format(key), template.format(write_key))
            self.assertIsInstance(show, exp.Show)
            self.assertEqual(show.name, expected_name)

            template = "SHOW {} LIKE '%foo%'"
            show = self.validate_identity(template.format(key), template.format(write_key))
            self.assertIsInstance(show, exp.Show)
            self.assertIsInstance(show.args["like"], exp.Literal)
            self.assertEqual(show.text("like"), "%foo%")

            template = "SHOW {} WHERE Column_name LIKE '%foo%'"
            show = self.validate_identity(template.format(key), template.format(write_key))
            self.assertIsInstance(show, exp.Show)
            self.assertIsInstance(show.args["where"], exp.Where)
            self.assertEqual(show.args["where"].sql(), "WHERE Column_name LIKE '%foo%'")

    def test_show_columns(self):
        show = self.validate_identity("SHOW COLUMNS FROM tbl_name")
        self.assertIsInstance(show, exp.Show)
        self.assertEqual(show.name, "COLUMNS")
        self.assertEqual(show.text("target"), "tbl_name")
        self.assertFalse(show.args["full"])

        show = self.validate_identity("SHOW FULL COLUMNS FROM tbl_name FROM db_name LIKE '%foo%'")
        self.assertIsInstance(show, exp.Show)
        self.assertEqual(show.text("target"), "tbl_name")
        self.assertTrue(show.args["full"])
        self.assertEqual(show.text("db"), "db_name")
        self.assertIsInstance(show.args["like"], exp.Literal)
        self.assertEqual(show.text("like"), "%foo%")

    def test_show_name(self):
        for key in [
            "CREATE DATABASE",
            "CREATE EVENT",
            "CREATE FUNCTION",
            "CREATE PROCEDURE",
            "CREATE TABLE",
            "CREATE TRIGGER",
            "CREATE VIEW",
            "FUNCTION CODE",
            "PROCEDURE CODE",
        ]:
            show = self.validate_identity(f"SHOW {key} foo")
            self.assertIsInstance(show, exp.Show)
            self.assertEqual(show.name, key)
            self.assertEqual(show.text("target"), "foo")

    def test_show_grants(self):
        show = self.validate_identity(f"SHOW GRANTS FOR foo")
        self.assertIsInstance(show, exp.Show)
        self.assertEqual(show.name, "GRANTS")
        self.assertEqual(show.text("target"), "foo")

    def test_show_engine(self):
        show = self.validate_identity("SHOW ENGINE foo STATUS")
        self.assertIsInstance(show, exp.Show)
        self.assertEqual(show.name, "ENGINE")
        self.assertEqual(show.text("target"), "foo")
        self.assertFalse(show.args["mutex"])

        show = self.validate_identity("SHOW ENGINE foo MUTEX")
        self.assertEqual(show.name, "ENGINE")
        self.assertEqual(show.text("target"), "foo")
        self.assertTrue(show.args["mutex"])

    def test_show_errors(self):
        for key in ["ERRORS", "WARNINGS"]:
            show = self.validate_identity(f"SHOW {key}")
            self.assertIsInstance(show, exp.Show)
            self.assertEqual(show.name, key)

            show = self.validate_identity(f"SHOW {key} LIMIT 2, 3")
            self.assertEqual(show.text("limit"), "3")
            self.assertEqual(show.text("offset"), "2")

    def test_show_index(self):
        show = self.validate_identity("SHOW INDEX FROM foo")
        self.assertIsInstance(show, exp.Show)
        self.assertEqual(show.name, "INDEX")
        self.assertEqual(show.text("target"), "foo")

        show = self.validate_identity("SHOW INDEX FROM foo FROM bar")
        self.assertEqual(show.text("db"), "bar")

        self.validate_all(
            "SHOW INDEX FROM bar.foo", write={"mysql": "SHOW INDEX FROM foo FROM bar"}
        )

    def test_show_db_like_or_where_sql(self):
        for key in [
            "OPEN TABLES",
            "TABLE STATUS",
            "TRIGGERS",
        ]:
            show = self.validate_identity(f"SHOW {key}")
            self.assertIsInstance(show, exp.Show)
            self.assertEqual(show.name, key)

            show = self.validate_identity(f"SHOW {key} FROM db_name")
            self.assertEqual(show.name, key)
            self.assertEqual(show.text("db"), "db_name")

            show = self.validate_identity(f"SHOW {key} LIKE '%foo%'")
            self.assertEqual(show.name, key)
            self.assertIsInstance(show.args["like"], exp.Literal)
            self.assertEqual(show.text("like"), "%foo%")

            show = self.validate_identity(f"SHOW {key} WHERE Column_name LIKE '%foo%'")
            self.assertEqual(show.name, key)
            self.assertIsInstance(show.args["where"], exp.Where)
            self.assertEqual(show.args["where"].sql(), "WHERE Column_name LIKE '%foo%'")

    def test_show_processlist(self):
        show = self.validate_identity("SHOW PROCESSLIST")
        self.assertIsInstance(show, exp.Show)
        self.assertEqual(show.name, "PROCESSLIST")
        self.assertFalse(show.args["full"])

        show = self.validate_identity("SHOW FULL PROCESSLIST")
        self.assertEqual(show.name, "PROCESSLIST")
        self.assertTrue(show.args["full"])

    def test_show_profile(self):
        show = self.validate_identity("SHOW PROFILE")
        self.assertIsInstance(show, exp.Show)
        self.assertEqual(show.name, "PROFILE")

        show = self.validate_identity("SHOW PROFILE BLOCK IO")
        self.assertEqual(show.args["types"][0].name, "BLOCK IO")

        show = self.validate_identity(
            "SHOW PROFILE BLOCK IO, PAGE FAULTS FOR QUERY 1 OFFSET 2 LIMIT 3"
        )
        self.assertEqual(show.args["types"][0].name, "BLOCK IO")
        self.assertEqual(show.args["types"][1].name, "PAGE FAULTS")
        self.assertEqual(show.text("query"), "1")
        self.assertEqual(show.text("offset"), "2")
        self.assertEqual(show.text("limit"), "3")

    def test_show_replica_status(self):
        show = self.validate_identity("SHOW REPLICA STATUS")
        self.assertIsInstance(show, exp.Show)
        self.assertEqual(show.name, "REPLICA STATUS")

        show = self.validate_identity("SHOW SLAVE STATUS", "SHOW REPLICA STATUS")
        self.assertIsInstance(show, exp.Show)
        self.assertEqual(show.name, "REPLICA STATUS")

        show = self.validate_identity("SHOW REPLICA STATUS FOR CHANNEL channel_name")
        self.assertEqual(show.text("channel"), "channel_name")

    def test_show_tables(self):
        show = self.validate_identity("SHOW TABLES")
        self.assertIsInstance(show, exp.Show)
        self.assertEqual(show.name, "TABLES")

        show = self.validate_identity("SHOW FULL TABLES FROM db_name LIKE '%foo%'")
        self.assertTrue(show.args["full"])
        self.assertEqual(show.text("db"), "db_name")
        self.assertIsInstance(show.args["like"], exp.Literal)
        self.assertEqual(show.text("like"), "%foo%")

    def test_set_variable(self):
        cmd = self.parse_one("SET SESSION x = 1")
        item = cmd.expressions[0]
        self.assertEqual(item.text("kind"), "SESSION")
        self.assertIsInstance(item.this, exp.EQ)
        self.assertEqual(item.this.left.name, "x")
        self.assertEqual(item.this.right.name, "1")

        cmd = self.parse_one("SET @@GLOBAL.x = @@GLOBAL.y")
        item = cmd.expressions[0]
        self.assertEqual(item.text("kind"), "")
        self.assertIsInstance(item.this, exp.EQ)
        self.assertIsInstance(item.this.left, exp.SessionParameter)
        self.assertIsInstance(item.this.right, exp.SessionParameter)

        cmd = self.parse_one("SET NAMES 'charset_name' COLLATE 'collation_name'")
        item = cmd.expressions[0]
        self.assertEqual(item.text("kind"), "NAMES")
        self.assertEqual(item.name, "charset_name")
        self.assertEqual(item.text("collate"), "collation_name")

        cmd = self.parse_one("SET CHARSET DEFAULT")
        item = cmd.expressions[0]
        self.assertEqual(item.text("kind"), "CHARACTER SET")
        self.assertEqual(item.this.name, "DEFAULT")

        cmd = self.parse_one("SET x = 1, y = 2")
        self.assertEqual(len(cmd.expressions), 2)

    def test_json_object(self):
        self.validate_identity("SELECT JSON_OBJECT('id', 87, 'name', 'carrot')")

    def test_is_null(self):
        self.validate_all(
            "SELECT ISNULL(x)", write={"": "SELECT (x IS NULL)", "mysql": "SELECT (x IS NULL)"}
        )

    def test_monthname(self):
        self.validate_all(
            "MONTHNAME(x)",
            write={
                "": "TIME_TO_STR(CAST(x AS DATE), '%B')",
                "mysql": "DATE_FORMAT(x, '%M')",
            },
        )

    def test_safe_div(self):
        self.validate_all(
            "a / b",
            write={
                "bigquery": "a / NULLIF(b, 0)",
                "clickhouse": "a / b",
                "databricks": "a / NULLIF(b, 0)",
                "duckdb": "a / b",
                "hive": "a / b",
                "mysql": "a / b",
                "oracle": "a / NULLIF(b, 0)",
                "snowflake": "a / NULLIF(b, 0)",
                "spark": "a / b",
                "starrocks": "a / b",
                "drill": "CAST(a AS DOUBLE) / NULLIF(b, 0)",
                "postgres": "CAST(a AS DOUBLE PRECISION) / NULLIF(b, 0)",
                "presto": "CAST(a AS DOUBLE) / NULLIF(b, 0)",
                "redshift": "CAST(a AS DOUBLE PRECISION) / NULLIF(b, 0)",
                "sqlite": "CAST(a AS REAL) / b",
                "teradata": "CAST(a AS DOUBLE) / NULLIF(b, 0)",
                "trino": "CAST(a AS DOUBLE) / NULLIF(b, 0)",
                "tsql": "CAST(a AS FLOAT) / NULLIF(b, 0)",
            },
        )