Linux ip-172-26-2-223 5.4.0-1018-aws #18-Ubuntu SMP Wed Jun 24 01:15:00 UTC 2020 x86_64
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: 172.26.2.223 | : 13.58.117.102
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8.1.13
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[ HOME SHELL ]
Name
Size
Permission
Action
1st.result
597
B
-rw-r--r--
acl_tables_errors_debug.result
8.93
KB
-rw-r--r--
alias.result
13.58
KB
-rw-r--r--
almost_full.result
1.11
KB
-rw-r--r--
alter_table-big.result
5.45
KB
-rw-r--r--
alter_table.result
154.41
KB
-rw-r--r--
analyze.result
3.69
KB
-rw-r--r--
ansi.result
1.92
KB
-rw-r--r--
archive-big.result
616
B
-rw-r--r--
archive.result
525.18
KB
-rw-r--r--
archive_bitfield.result
4.26
KB
-rw-r--r--
archive_debug.result
355
B
-rw-r--r--
archive_gis.result
25.98
KB
-rw-r--r--
archive_no_symlink.result
882
B
-rw-r--r--
archive_plugin.result
531
B
-rw-r--r--
archive_symlink.result
2.3
KB
-rw-r--r--
auth_rpl.result
1.85
KB
-rw-r--r--
auto_increment.result
12.11
KB
-rw-r--r--
backup.result
4.29
KB
-rw-r--r--
bench_count_distinct.result
557
B
-rw-r--r--
big_test.require
17
B
-rw-r--r--
bigint.result
23.33
KB
-rw-r--r--
binary.result
6.09
KB
-rw-r--r--
binary_to_hex.result
5.87
KB
-rw-r--r--
binlog_tx_isolation.result
1.71
KB
-rw-r--r--
blackhole.result
613
B
-rw-r--r--
blackhole_plugin.result
565
B
-rw-r--r--
bool.result
2.67
KB
-rw-r--r--
bootstrap.result
525
B
-rw-r--r--
bug12368203.result
2.77
KB
-rw-r--r--
bug12427262.result
1.86
KB
-rw-r--r--
bug12969156.result
952
B
-rw-r--r--
bug17076131.result
322
B
-rw-r--r--
bug33509.result
2.31
KB
-rw-r--r--
bug39022.result
1.2
KB
-rw-r--r--
bug46080.result
669
B
-rw-r--r--
bug46261.result
353
B
-rw-r--r--
bug46760.result
1.26
KB
-rw-r--r--
bug47671.result
287
B
-rw-r--r--
bug58669.result
480
B
-rw-r--r--
bulk_replace.result
281
B
-rw-r--r--
cache_innodb.result
6.96
KB
-rw-r--r--
case.result
10.63
KB
-rw-r--r--
case_insensitive_file_system.r...
46
B
-rw-r--r--
case_sensitive_file_system.req...
47
B
-rw-r--r--
cast.result
16.27
KB
-rw-r--r--
change_user.result
2.82
KB
-rw-r--r--
charset.result
2.14
KB
-rw-r--r--
check.result
2.05
KB
-rw-r--r--
check_auto_permission.result
261
B
-rw-r--r--
check_var_limit.require
8
B
-rw-r--r--
client_xml.result
2.38
KB
-rw-r--r--
comment_column.result
141.21
KB
-rw-r--r--
comment_column2.result
355.68
KB
-rw-r--r--
comment_index.result
173.32
KB
-rw-r--r--
comment_table.result
28.95
KB
-rw-r--r--
comments.result
2.34
KB
-rw-r--r--
commit.result
14.83
KB
-rw-r--r--
commit_1innodb.result
19.59
KB
-rw-r--r--
compare.result
5.07
KB
-rw-r--r--
compress.result
66.24
KB
-rw-r--r--
concurrent_innodb_safelog.resu...
32.01
KB
-rw-r--r--
concurrent_innodb_unsafelog.re...
31.74
KB
-rw-r--r--
condition_filter.result
2.17
KB
-rw-r--r--
connect.result
11.02
KB
-rw-r--r--
connect_debug.result
1.46
KB
-rw-r--r--
consistent_snapshot.result
1.14
KB
-rw-r--r--
constraints.result
2.56
KB
-rw-r--r--
count_distinct.result
8.04
KB
-rw-r--r--
count_distinct2.result
2.21
KB
-rw-r--r--
count_distinct3.result
278
B
-rw-r--r--
create-big.result
7.6
KB
-rw-r--r--
create.result
71.42
KB
-rw-r--r--
create_not_windows.result
961
B
-rw-r--r--
create_select_tmp.result
846
B
-rw-r--r--
create_w_max_indexes_64.result
84.46
KB
-rw-r--r--
csv.result
59.08
KB
-rw-r--r--
csv_alter_table.result
1.17
KB
-rw-r--r--
csv_not_null.result
1.93
KB
-rw-r--r--
ctype_ascii.result
2.5
KB
-rw-r--r--
ctype_big5.result
34.28
KB
-rw-r--r--
ctype_binary.result
82.78
KB
-rw-r--r--
ctype_collate.result
18.3
KB
-rw-r--r--
ctype_cp1250_ch.result
22.29
KB
-rw-r--r--
ctype_cp1251.result
96.48
KB
-rw-r--r--
ctype_cp932.result
996
B
-rw-r--r--
ctype_cp932_binlog_row.result
734
B
-rw-r--r--
ctype_cp932_binlog_stm.result
251.36
KB
-rw-r--r--
ctype_create.result
3.12
KB
-rw-r--r--
ctype_errors.result
1.66
KB
-rw-r--r--
ctype_eucjpms.result
400.48
KB
-rw-r--r--
ctype_euckr.result
435.54
KB
-rw-r--r--
ctype_filename.result
324
B
-rw-r--r--
ctype_filesystem.result
341
B
-rw-r--r--
ctype_gb18030.result
69.33
KB
-rw-r--r--
ctype_gb18030_binlog.result
909
B
-rw-r--r--
ctype_gb18030_conversion.resul...
1.17
MB
-rw-r--r--
ctype_gb18030_encoding_cn.resu...
41.39
KB
-rw-r--r--
ctype_gb18030_encoding_utf8.re...
40.64
KB
-rw-r--r--
ctype_gb18030_ligatures.result
24.81
KB
-rw-r--r--
ctype_gb2312.result
33.73
KB
-rw-r--r--
ctype_gbk.result
50.07
KB
-rw-r--r--
ctype_gbk_binlog.result
633
B
-rw-r--r--
ctype_hebrew.result
254
B
-rw-r--r--
ctype_latin1.result
119.29
KB
-rw-r--r--
ctype_latin1_de.result
15.74
KB
-rw-r--r--
ctype_latin2.result
13.71
KB
-rw-r--r--
ctype_latin2_ch.result
25.11
KB
-rw-r--r--
ctype_ldml.result
28.13
KB
-rw-r--r--
ctype_like_range.result
80.89
KB
-rw-r--r--
ctype_many.result
41.87
KB
-rw-r--r--
ctype_mb.result
2.13
KB
-rw-r--r--
ctype_recoding.result
9.6
KB
-rw-r--r--
ctype_sjis.result
195.81
KB
-rw-r--r--
ctype_tis620.result
101.02
KB
-rw-r--r--
ctype_uca.result
155.4
KB
-rw-r--r--
ctype_ucs.result
143.96
KB
-rw-r--r--
ctype_ucs2_def.result
1.05
KB
-rw-r--r--
ctype_ujis.result
365.3
KB
-rw-r--r--
ctype_ujis_ucs2.result
548.6
KB
-rw-r--r--
ctype_utf16.result
47.3
KB
-rw-r--r--
ctype_utf16_def.result
273
B
-rw-r--r--
ctype_utf16_uca.result
72.47
KB
-rw-r--r--
ctype_utf16le.result
52.96
KB
-rw-r--r--
ctype_utf32.result
50.55
KB
-rw-r--r--
ctype_utf32_uca.result
75.29
KB
-rw-r--r--
ctype_utf8.result
169.69
KB
-rw-r--r--
ctype_utf8mb4.result
83.57
KB
-rw-r--r--
ctype_utf8mb4_heap.result
75.01
KB
-rw-r--r--
ctype_utf8mb4_innodb.result
77.85
KB
-rw-r--r--
ctype_utf8mb4_myisam.result
77.43
KB
-rw-r--r--
ctype_utf8mb4_uca.result
38.82
KB
-rw-r--r--
daemonize_opt.result
14
B
-rw-r--r--
datadir_permission.result
1.09
KB
-rw-r--r--
date_formats.result
28.69
KB
-rw-r--r--
ddl_i18n_koi8r.result
123.56
KB
-rw-r--r--
ddl_i18n_utf8.result
126.58
KB
-rw-r--r--
deadlock_innodb.result
2.35
KB
-rw-r--r--
debug_sync.result
12.18
KB
-rw-r--r--
debug_sync2.result
1.15
KB
-rw-r--r--
default.result
8.17
KB
-rw-r--r--
delete.result
22.7
KB
-rw-r--r--
delete_all_rows.result
2.26
KB
-rw-r--r--
deprecate_eof.result
8
KB
-rw-r--r--
deprecated_features.result
2.03
KB
-rw-r--r--
derived.result
172.18
KB
-rw-r--r--
dirty_close.result
345
B
-rw-r--r--
disabled_replication.result
4.82
KB
-rw-r--r--
disabled_storage_engines.resul...
3.28
KB
-rw-r--r--
disconnect_on_expired_password...
1.42
KB
-rw-r--r--
disconnect_on_expired_password...
1.49
KB
-rw-r--r--
distinct.result
80.43
KB
-rw-r--r--
drop-no_root.result
454
B
-rw-r--r--
drop.result
6.71
KB
-rw-r--r--
drop_debug.result
485
B
-rw-r--r--
ds_mrr-big.result
2.93
KB
-rw-r--r--
dynamic_tracing.result
813
B
-rw-r--r--
empty_table.result
229
B
-rw-r--r--
enable_cleartext_plugin.result
1.4
KB
-rw-r--r--
endspace.result
7.25
KB
-rw-r--r--
eq_range_idx_stat.result
6.56
KB
-rw-r--r--
error_simulation.result
3.17
KB
-rw-r--r--
errors.result
6.11
KB
-rw-r--r--
events_1.result
28.3
KB
-rw-r--r--
events_2.result
17.79
KB
-rw-r--r--
events_and_binlog.result
297
B
-rw-r--r--
events_bugs.result
40.94
KB
-rw-r--r--
events_embedded.result
86
B
-rw-r--r--
events_grant.result
10.33
KB
-rw-r--r--
events_logs_tests.result
2.37
KB
-rw-r--r--
events_microsec.result
810
B
-rw-r--r--
events_restart.result
4.36
KB
-rw-r--r--
events_scheduling.result
3.11
KB
-rw-r--r--
events_stress.result
2.39
KB
-rw-r--r--
events_time_zone.result
5.4
KB
-rw-r--r--
events_trans.result
3.61
KB
-rw-r--r--
events_trans_notembedded.resul...
1.88
KB
-rw-r--r--
examined_rows.result
6.73
KB
-rw-r--r--
execution_constants.result
1.03
KB
-rw-r--r--
explain.result
39.39
KB
-rw-r--r--
explain_for_connection_crash.r...
1004
B
-rw-r--r--
explain_for_connection_rqg_jso...
87.48
KB
-rw-r--r--
explain_for_connection_rqg_tra...
35.98
KB
-rw-r--r--
explain_for_connection_small_j...
25.46
KB
-rw-r--r--
explain_for_connection_small_t...
10.3
KB
-rw-r--r--
explain_json_all.result
98.36
KB
-rw-r--r--
explain_json_none.result
102.18
KB
-rw-r--r--
explain_other.result
42.23
KB
-rw-r--r--
file_contents.result
181
B
-rw-r--r--
filesort_debug.result
4.59
KB
-rw-r--r--
filesort_merge.result
2.02
KB
-rw-r--r--
filesort_pack.result
675
B
-rw-r--r--
filter_single_col_idx_big.resu...
38.05
KB
-rw-r--r--
filter_single_col_idx_small.re...
42.99
KB
-rw-r--r--
fix_priv_tables.result
1.96
KB
-rw-r--r--
flush.result
13.78
KB
-rw-r--r--
flush2.result
1.06
KB
-rw-r--r--
flush_block_commit.result
1.47
KB
-rw-r--r--
flush_block_commit_notembedded...
872
B
-rw-r--r--
flush_read_lock.result
73.94
KB
-rw-r--r--
flush_read_lock_kill.result
1.12
KB
-rw-r--r--
flush_table.result
12.33
KB
-rw-r--r--
foreign_key.result
4.84
KB
-rw-r--r--
fulltext.result
32.93
KB
-rw-r--r--
fulltext2.result
7.54
KB
-rw-r--r--
fulltext3.result
815
B
-rw-r--r--
fulltext_cache.result
2.67
KB
-rw-r--r--
fulltext_distinct.result
1.45
KB
-rw-r--r--
fulltext_left_join.result
4
KB
-rw-r--r--
fulltext_multi.result
766
B
-rw-r--r--
fulltext_order_by.result
6.05
KB
-rw-r--r--
fulltext_plugin.result
229
B
-rw-r--r--
fulltext_update.result
1.11
KB
-rw-r--r--
fulltext_var.result
1.3
KB
-rw-r--r--
func_aes.result
12.97
KB
-rw-r--r--
func_aes_cfb1.result
4.5
KB
-rw-r--r--
func_aes_cfb128.result
4.57
KB
-rw-r--r--
func_aes_cfb8.result
4.5
KB
-rw-r--r--
func_aes_kdf_hkdf.result
3.94
KB
-rw-r--r--
func_aes_kdf_pbkdf2_hmac.resul...
6.79
KB
-rw-r--r--
func_aes_misc.result
8.46
KB
-rw-r--r--
func_aes_ofb.result
4.47
KB
-rw-r--r--
func_analyse.result
23.09
KB
-rw-r--r--
func_bitwise_ops.result
80.6
KB
-rw-r--r--
func_compress.result
5.46
KB
-rw-r--r--
func_concat.result
4.37
KB
-rw-r--r--
func_crypt.result
2.05
KB
-rw-r--r--
func_date_add.result
3.74
KB
-rw-r--r--
func_default.result
1.45
KB
-rw-r--r--
func_des_encrypt.result
2.68
KB
-rw-r--r--
func_digest.result
122.35
KB
-rw-r--r--
func_encrypt.result
19.82
KB
-rw-r--r--
func_encrypt_nossl.result
7.75
KB
-rw-r--r--
func_encrypt_ucs2.result
1.21
KB
-rw-r--r--
func_equal.result
1.27
KB
-rw-r--r--
func_found_rows.result
285
B
-rw-r--r--
func_gconcat.result
49.9
KB
-rw-r--r--
func_group.result
66.46
KB
-rw-r--r--
func_group_innodb.result
6.07
KB
-rw-r--r--
func_group_innodb_16k.result
693
B
-rw-r--r--
func_if.result
6.29
KB
-rw-r--r--
func_in_all.result
49.27
KB
-rw-r--r--
func_in_icp.result
48.91
KB
-rw-r--r--
func_in_icp_mrr.result
49.21
KB
-rw-r--r--
func_in_mrr.result
48.93
KB
-rw-r--r--
func_in_mrr_cost.result
48.65
KB
-rw-r--r--
func_in_none.result
48.6
KB
-rw-r--r--
func_isnull.result
827
B
-rw-r--r--
func_like.result
7.78
KB
-rw-r--r--
func_math.result
42.22
KB
-rw-r--r--
func_misc.result
36.8
KB
-rw-r--r--
func_op.result
2.12
KB
-rw-r--r--
func_regexp.result
4.47
KB
-rw-r--r--
func_rollback.result
13.02
KB
-rw-r--r--
func_sapdb.result
12.49
KB
-rw-r--r--
func_set.result
8.9
KB
-rw-r--r--
func_str.result
174.94
KB
-rw-r--r--
func_str_debug.result
349
B
-rw-r--r--
func_str_no_ps.result
1.3
KB
-rw-r--r--
func_system.result
2.9
KB
-rw-r--r--
func_test.result
14.47
KB
-rw-r--r--
func_time.result
71.47
KB
-rw-r--r--
func_timestamp.result
518
B
-rw-r--r--
func_weight_string.result
11.56
KB
-rw-r--r--
function_defaults.result
109.58
KB
-rw-r--r--
gcc296.result
528
B
-rw-r--r--
get_diagnostics.result
28.42
KB
-rw-r--r--
get_table_share.result
20.56
KB
-rw-r--r--
gis-debug.result
10.1
KB
-rw-r--r--
gis-precise.result
162.17
KB
-rw-r--r--
gis-rt-precise.result
2.42
KB
-rw-r--r--
gis-rtree.result
102.08
KB
-rw-r--r--
gis.result
131.8
KB
-rw-r--r--
grant.result
121.17
KB
-rw-r--r--
grant2.result
36.52
KB
-rw-r--r--
grant3.result
8.41
KB
-rw-r--r--
grant4.result
9.36
KB
-rw-r--r--
grant_alter_user.result
40.96
KB
-rw-r--r--
grant_alter_user_qa.result
98.38
KB
-rw-r--r--
grant_cache.result
6.71
KB
-rw-r--r--
grant_debug.result
8.5
KB
-rw-r--r--
grant_explain_non_select.resul...
10.27
KB
-rw-r--r--
grant_lowercase_fs.result
1.2
KB
-rw-r--r--
grant_user_lock.result
16.9
KB
-rw-r--r--
grant_user_lock_qa.result
41.4
KB
-rw-r--r--
greedy_optimizer.result
632.59
KB
-rw-r--r--
greedy_search.result
31.05
KB
-rw-r--r--
group_by.result
120.07
KB
-rw-r--r--
group_by_fd_no_prot.result
81.15
KB
-rw-r--r--
group_by_fd_ps_prot.result
61.28
KB
-rw-r--r--
group_min_max.result
189.52
KB
-rw-r--r--
group_min_max_innodb.result
25.09
KB
-rw-r--r--
gtid_next_xa_binlog_off.result
30.9
KB
-rw-r--r--
gtids_anonymous_trxs_violation...
687
B
-rw-r--r--
handler_innodb.result
41.58
KB
-rw-r--r--
handler_myisam.result
45.48
KB
-rw-r--r--
handler_read_last.result
1.15
KB
-rw-r--r--
have_big5.require
79
B
-rw-r--r--
have_binlog_format_mixed.requi...
40
B
-rw-r--r--
have_binlog_format_row.require
38
B
-rw-r--r--
have_binlog_format_statement.r...
44
B
-rw-r--r--
have_compress.require
38
B
-rw-r--r--
have_cp1250_ch.require
79
B
-rw-r--r--
have_cp1251.require
84
B
-rw-r--r--
have_cp866.require
82
B
-rw-r--r--
have_cp932.require
83
B
-rw-r--r--
have_crypt.require
35
B
-rw-r--r--
have_debug.require
8
B
-rw-r--r--
have_debug_sync.require
13
B
-rw-r--r--
have_eucjpms.require
87
B
-rw-r--r--
have_euckr.require
81
B
-rw-r--r--
have_gb18030.require
87
B
-rw-r--r--
have_gb2312.require
84
B
-rw-r--r--
have_gbk.require
78
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Code Editor : group_by_fd_no_prot.result
set optimizer_trace_max_mem_size=1048576; set end_markers_in_json=on; set optimizer_trace="enabled=on"; SET @old_sql_mode = @@sql_mode; SET @@sql_mode='ONLY_FULL_GROUP_BY'; Warnings: Warning 3090 Changing sql mode 'NO_AUTO_CREATE_USER' is deprecated. It will be removed in a future release. # # Bug#16021396 ONLY_FULL_GROUP_BY REJECTS VALID QUERY USING VIEW # create table t1(a int, b int, c int) engine=InnoDB; create algorithm=merge view v1 as select t1.a*2 as a, t1.b*2 as b, t1.c*2 as c from t1; show create view v1; View Create View character_set_client collation_connection v1 CREATE ALGORITHM=MERGE DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select (`t1`.`a` * 2) AS `a`,(`t1`.`b` * 2) AS `b`,(`t1`.`c` * 2) AS `c` from `t1` latin1 latin1_swedish_ci select sin(b) as z from t1 group by sin(b); z select sin(b) as z from v1 group by sin(b); z select sin(b) as z from t1 group by b; z select sin(b) as z from v1 group by b; z select sin(b) as z from v1 group by z; z drop view v1; create algorithm=temptable view v1 as select t1.a*2 as a, t1.b*2 as b, t1.c*2 as c from t1; show create view v1; View Create View character_set_client collation_connection v1 CREATE ALGORITHM=TEMPTABLE DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select (`t1`.`a` * 2) AS `a`,(`t1`.`b` * 2) AS `b`,(`t1`.`c` * 2) AS `c` from `t1` latin1 latin1_swedish_ci select sin(b) as z from t1 group by sin(b); z select sin(b) as z from v1 group by sin(b); z select sin(b) as z from t1 group by b; z select sin(b) as z from v1 group by b; z select sin(b) as z from v1 group by z; z drop view v1; drop table t1; # From testcase of Bug#16903135: CREATE TABLE group_by_test2 ( id int unsigned primary key, cat int unsigned not null, name varchar(10), num int unsigned ); INSERT INTO group_by_test2 (id,cat,name,num) VALUES (1,10,'foo',2), (2,11,'foo',1), (3,22,'bar',3), (4,23,'bar',7), (5,34,'test',7); SELECT cat, name, SUM(num) FROM group_by_test2 GROUP BY cat; ERROR 42000: Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.group_by_test2.name' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by ALTER TABLE group_by_test2 ADD UNIQUE INDEX (cat); SELECT cat, name, SUM(num) FROM group_by_test2 GROUP BY cat; cat name SUM(num) 10 foo 2 11 foo 1 22 bar 3 23 bar 7 34 test 7 SELECT cat, name, SUM(num) FROM group_by_test2 GROUP BY cat WITH ROLLUP; ERROR 42000: Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.group_by_test2.name' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by # Expressions of group columns are ok: SELECT cat, length(cat), SUM(num) FROM group_by_test2 GROUP BY cat WITH ROLLUP; cat length(cat) SUM(num) 10 2 2 11 2 1 22 2 3 23 2 7 34 2 7 NULL NULL 20 DROP TABLE group_by_test2; # Test from Bug #18993257 SELECT AGGR + NON-AGGR FROM JOIN WITH VIEW IS NOT REJECTED BY ONLY_FULL_GROUP_BY CREATE TABLE t1 ( col_int_key INT, col_varchar_key VARCHAR(1) ); CREATE TABLE t2 ( pk INTEGER, col_int_key INTEGER ); CREATE VIEW view_b AS SELECT * FROM t2; SELECT MIN( alias2.col_int_key ), alias2.col_int_key FROM t1 AS alias1, t2 AS alias2 WHERE alias1.col_int_key IS NULL; ERROR 42000: In aggregated query without GROUP BY, expression #2 of SELECT list contains nonaggregated column 'test.alias2.col_int_key'; this is incompatible with sql_mode=only_full_group_by # Same with view: SELECT MIN( alias2.col_int_key ), alias2.col_int_key FROM t1 AS alias1, view_b AS alias2 WHERE alias1.col_int_key IS NULL; ERROR 42000: In aggregated query without GROUP BY, expression #2 of SELECT list contains nonaggregated column 'alias2.col_int_key'; this is incompatible with sql_mode=only_full_group_by DROP TABLE t1, t2; DROP VIEW view_b; # # WL#2489; Recognizing some functional dependencies # create table t1( a int, b int not null, c int not null, d int, unique key(b,c), unique key(b,d) ); select sin(a) as z from t1 group by b; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.t1.a' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select sin(a) as z from t1 group by d,b; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.t1.a' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by # {b,c} UNIQUE NOT NULL => {c,b}->a select sin(a) as z from t1 group by c,b; z select sin(a+b*c) as z from t1 group by c,b; z # In PS mode, we see nothing below, because only_full_group_by # checks are done at PREPARE, whereas trace below is from EXECUTE. SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "all_columns_of_table_map_bits": [ 0 ] /* all_columns_of_table_map_bits */, "columns": [ "test.t1.c", "test.t1.b" ] /* columns */ } # With outer references: select (select sin(a)) as z from t1 group by d,b; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.t1.a' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select (select sin(a)) as z from t1 group by c,b; z # If key columns are in function, functional dependency disappears select sin(a) as z from t1 group by c*2,b*2; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.t1.a' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by # FDs are recognized, like in SQL standard: # b=2 => c->{b,c} => c->a as (b,c) is unique not null. select sin(a) as z from t1 where b=2 group by c; z SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "all_columns_of_table_map_bits": [ 0 ] /* all_columns_of_table_map_bits */, "columns": [ "test.t1.c", "test.t1.b" ] /* columns */ } # t2.a=t1.a => {t1.b,t1.c}->t2.a select sin(t2.a) as z from t1, t1 as t2 where t2.a=t1.a group by t1.b,t1.c; z SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "all_columns_of_table_map_bits": [ 0 ] /* all_columns_of_table_map_bits */, "columns": [ "test.t1.b", "test.t1.c", "test.t2.a" ] /* columns */ } # t2.b=t1.b and t2.c=t1.c => {t1.b,t1.c}->{all cols of t2} select sin(t2.a) as z from t1, t1 as t2 where t2.b=t1.b and t2.c=t1.c group by t1.b,t1.c; z SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "all_columns_of_table_map_bits": [ 0, 1 ] /* all_columns_of_table_map_bits */, "columns": [ "test.t1.b", "test.t1.c", "test.t2.b", "test.t2.c" ] /* columns */ } # t2.b=t1.b and t2.c=t1.c => {t1.b,t1.c}->{all cols of t2} # Moreover, {t1.b,t1.c}->{t1.d}. # So t3.b=t2.b and t3.c=t1.d => {t1.b,t1.c}->{all cols of t3}. select t3.a from t1, t1 as t2, t1 as t3 where t3.b=t2.b and t3.c=t1.d and t2.b=t1.b and t2.c=t1.c group by t1.b,t1.c; a SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "all_columns_of_table_map_bits": [ 0, 1, 2 ] /* all_columns_of_table_map_bits */, "columns": [ "test.t1.b", "test.t1.c", "test.t3.c", "test.t2.b", "test.t2.c", "test.t3.b" ] /* columns */ } # 3 tables: # {t1.b,t1.c}->{t1.*}->{t2.b,t2.c}->{t2.*}->{t3.pk}->{t3.b} create table t3(pk int primary key, b int); select t3.b from t1,t1 as t2,t3 where t3.pk=t2.d and t2.b=t1.b and t2.c=t1.a group by t1.b,t1.c; b drop table t3; # With subq select (select t1.b from t1 where t2.b=t1.b group by t1.a) from t1 as t2; (select t1.b from t1 where t2.b=t1.b group by t1.a) # Outer join. create table t2 like t1; delete from t1; insert into t1 (a,b) values(1,10),(2,20); Warnings: Warning 1364 Field 'c' doesn't have a default value insert into t2 (a,b) values(1,-10); Warnings: Warning 1364 Field 'c' doesn't have a default value # In result, t2.a is NULL for both rows, values of t1.a are 1 and 2 select t1.a,t2.a from t1 left join t2 on t2.a=t1.a and t2.b=t1.b; a a 1 NULL 2 NULL # So this query would choose one arbitrary value of t1.a - wrong: select t1.a from t1 left join t2 on t2.a=t1.a and t2.b=t1.b group by t2.a; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.t1.a' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by # Also problem for FD with constant: select t1.a,t2.a from t1 left join t2 on 42=t1.a and t2.b=t1.b; a a 1 NULL 2 NULL select t1.a from t1 left join t2 on 42=t1.a and t2.b=t1.b group by t2.a; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.t1.a' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select t1.a from t1 left join t2 on t2.b=t1.a group by t2.b; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.t1.a' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select t1.a from t1 left join t2 on 42=t1.a group by t2.a; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.t1.a' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select t1.c from t1 left join t2 on t1.a=t1.c group by t1.a; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.t1.c' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select t1.b from t1 left join t2 on t1.c=t1.b and t1.a=t1.c group by t1.a; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.t1.b' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select t1.a,t2.c from t1 left join t2 on t1.a=t2.c and cos(t2.c+t2.b)>0.5 and sin(t1.a+t2.d)<0.9 group by t1.a; a c 1 NULL 2 NULL # with keys: select t1.a,t2.d from t1 left join t2 on t1.a=t2.c and t1.d=t2.b and cos(t2.c+t2.b)>0.5 and sin(t1.a+t2.d)<0.9 group by t1.a,t1.d; a d 1 NULL 2 NULL # with non-determinism: select t1.a,t2.c from t1 left join t2 on t1.a=t2.c and cos(t2.c+rand())>0.5 group by t1.a; ERROR 42000: Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.t2.c' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select t1.a, ANY_VALUE(t2.c) from t1 left join t2 on t1.a=t2.c and cos(t2.c+rand())>0.5 group by t1.a; a ANY_VALUE(t2.c) 1 NULL 2 NULL # with parameter: prepare s from 'select t1.a,t2.c from t1 left join t2 on t1.a=t2.c and cos(t2.c+ ? )>0.5 group by t1.a'; execute s using @dummy; a c 1 NULL 2 NULL # No OR select t1.a,t2.c from t1 left join t2 on t1.a=t2.c and cos(t2.c+t2.b)>0.5 OR sin(t2.d)<0.9 group by t1.a; ERROR 42000: Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.t2.c' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by # With subq select t2.b from t1 left join t1 as t2 on t1.a=t2.b and t1.b group by t1.a; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.t2.b' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select t2.b from t1 left join t1 as t2 on t1.a=t2.b and (select t1.b) group by t1.a; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.t2.b' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by # Test ANY_VALUE: select ANY_VALUE(t1.b) from t1 left join t2 on t1.c=t1.b and t1.a=t1.c group by t1.a; ANY_VALUE(t1.b) 10 20 select 3+(5*t1.b) from t1 left join t2 on t1.c=t1.b and t1.a=t1.c group by t1.a; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.t1.b' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select 3+(5*ANY_VALUE(t1.b)) from t1 left join t2 on t1.c=t1.b and t1.a=t1.c group by t1.a; 3+(5*ANY_VALUE(t1.b)) 53 103 delete from t1; insert into t1 (a,b) values(1,10),(1,20),(2,30),(2,40); Warnings: Warning 1364 Field 'c' doesn't have a default value select a, sum(b) from t1; ERROR 42000: In aggregated query without GROUP BY, expression #1 of SELECT list contains nonaggregated column 'test.t1.a'; this is incompatible with sql_mode=only_full_group_by select any_value(a), sum(b) from t1; any_value(a) sum(b) 1 100 # different order of input rows, different "any_value": select any_value(a), sum(b) from (select * from t1 order by a desc) as d; any_value(a) sum(b) 1 100 select a,b,sum(c) from t1 group by a; ERROR 42000: Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.t1.b' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select a,any_value(b),sum(c) from t1 group by a; a any_value(b) sum(c) 1 10 0 2 30 0 select a,any_value(b),sum(c) from (select * from t1 order by a desc, b desc) as d group by a; a any_value(b) sum(c) 1 10 0 2 30 0 # With view. set @optimizer_switch_saved=@@optimizer_switch; # Merged view create algorithm=merge view v1 as select t1.a*2 as a, t1.b as b, t1.c as c, t1.d as d, t1.a as e from t1; show create view v1; View Create View character_set_client collation_connection v1 CREATE ALGORITHM=MERGE DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select (`t1`.`a` * 2) AS `a`,`t1`.`b` AS `b`,`t1`.`c` AS `c`,`t1`.`d` AS `d`,`t1`.`a` AS `e` from `t1` latin1 latin1_swedish_ci select sin(a) as z from v1 group by b; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'v1.a' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select sin(a) as z from v1 group by d,b; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'v1.a' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select sin(a) as z from v1 group by c,b; z 0.9092974268256817 0.9092974268256817 -0.7568024953079282 -0.7568024953079282 select (select sin(a)) as z from v1 group by d,b; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'v1.a' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select (select sin(a)) as z from v1 group by c,b; z 0.9092974268256817 0.9092974268256817 -0.7568024953079282 -0.7568024953079282 select sin(a) as z from t1 group by c*2,b*2; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.t1.a' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select sin(a+b*c) as z from v1 group by c,b; z 0.9092974268256817 0.9092974268256817 -0.7568024953079282 -0.7568024953079282 SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "all_columns_of_table_map_bits": [ 0 ] /* all_columns_of_table_map_bits */, "columns": [ "v1.c", "v1.b" ] /* columns */ } select sin(a) as z from v1 where b=2 group by c; z # {v1.b,v1.c}->v1.a->t2.a select sin(t2.a) as z from v1, v1 as t2 where t2.a=v1.a group by v1.b,v1.c; z 0.9092974268256817 0.9092974268256817 -0.7568024953079282 -0.7568024953079282 SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "all_columns_of_table_map_bits": [ 0 ] /* all_columns_of_table_map_bits */, "columns": [ "v1.b", "v1.c", "t2.a" ] /* columns */ } select sin(t2.a) as z from v1, v1 as t2 where t2.b=v1.b and t2.c=v1.c group by v1.b,v1.c; z 0.9092974268256817 0.9092974268256817 -0.7568024953079282 -0.7568024953079282 # With materialized view we get more dependencies than needed, due to implementation. select t3.a from v1, v1 as t2, v1 as t3 where t3.b=t2.b and t3.c=v1.d and t2.b=v1.b and t2.c=v1.c group by v1.b,v1.c; a SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "all_columns_of_table_map_bits": [ 0, 1, 2 ] /* all_columns_of_table_map_bits */, "columns": [ "v1.b", "v1.c", "t3.c", "t2.b", "t2.c", "t3.b" ] /* columns */ } # If we simply went to real_item(), we would have WHERE 2*a=b, or # GROUP BY 2*t1.a, so we would not find FDs. The original item # (direct_view_ref here) must also be considered! select a from v1 where a=b group by b; a SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "v1.b", "v1.a" ] /* columns */ } select b from v1 where a=b group by a; b SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "v1.a", "v1.b" ] /* columns */ } select v1.c from v1 where v1.c=v1.a group by v1.a; c SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "v1.a", "v1.c" ] /* columns */ } select v1.a from v1 group by v1.e; a 2 4 SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "v1.e", "v1.a" ] /* columns */ } select v1.c from v1 where v1.c=v1.a group by v1.e; c SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "v1.e", "v1.a", "v1.c" ] /* columns */ } # View appears only in WHERE select t2.d from v1, t1 as t2 where v1.a=t2.d and v1.e=t2.a group by t2.a; d SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "test.t2.a", "v1.e", "v1.a", "test.t2.d" ] /* columns */ } drop view if exists v1; # FD due to view's WHERE: create algorithm=merge view v1 as select t1.a*2 as a, t1.b as b from t1; select a from v1 group by b; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'v1.a' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by drop view if exists v1; # Merged view create algorithm=merge view v1 as select t1.a*2 as a, t1.b as b from t1 where t1.a=t1.b; select a from v1 group by b; a SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "v1.b", "test.t1.a", "v1.a" ] /* columns */ } drop view if exists v1; # Aggregates in view # Aggregates => skipping Merged view drop view if exists v1; Warnings: Note 1051 Unknown table 'test.v1' # Aggregates + GROUP BY in view # We group by b*5, to show that it works with GROUP expressions, not only fields. # Aggregates => skipping Merged view drop view if exists v1; Warnings: Note 1051 Unknown table 'test.v1' set optimizer_switch=@optimizer_switch_saved; set @optimizer_switch_saved=@@optimizer_switch; # Materialized view create algorithm=temptable view v1 as select t1.a*2 as a, t1.b as b, t1.c as c, t1.d as d, t1.a as e from t1; show create view v1; View Create View character_set_client collation_connection v1 CREATE ALGORITHM=TEMPTABLE DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select (`t1`.`a` * 2) AS `a`,`t1`.`b` AS `b`,`t1`.`c` AS `c`,`t1`.`d` AS `d`,`t1`.`a` AS `e` from `t1` latin1 latin1_swedish_ci select sin(a) as z from v1 group by b; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'v1.a' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select sin(a) as z from v1 group by d,b; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'v1.a' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select sin(a) as z from v1 group by c,b; z 0.9092974268256817 0.9092974268256817 -0.7568024953079282 -0.7568024953079282 select (select sin(a)) as z from v1 group by d,b; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'v1.a' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select (select sin(a)) as z from v1 group by c,b; z 0.9092974268256817 0.9092974268256817 -0.7568024953079282 -0.7568024953079282 select sin(a) as z from t1 group by c*2,b*2; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.t1.a' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select sin(a+b*c) as z from v1 group by c,b; z 0.9092974268256817 0.9092974268256817 -0.7568024953079282 -0.7568024953079282 SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "v1.c", "v1.b", "v1.a" ] /* columns */, "searched_in_materialized_tables": [ { "table": "`v1`", "all_columns_of_table_map_bits": [ 0 ] /* all_columns_of_table_map_bits */, "columns": [ "test.t1.c", "test.t1.b" ] /* columns */ } ] /* searched_in_materialized_tables */ } select sin(a) as z from v1 where b=2 group by c; z # {v1.b,v1.c}->v1.a->t2.a select sin(t2.a) as z from v1, v1 as t2 where t2.a=v1.a group by v1.b,v1.c; z 0.9092974268256817 0.9092974268256817 -0.7568024953079282 -0.7568024953079282 SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "v1.b", "v1.c", "v1.a", "t2.a" ] /* columns */, "searched_in_materialized_tables": [ { "table": "`v1`", "all_columns_of_table_map_bits": [ 0 ] /* all_columns_of_table_map_bits */, "columns": [ "test.t1.b", "test.t1.c" ] /* columns */ }, { "table": "`v1` `t2`" } ] /* searched_in_materialized_tables */ } select sin(t2.a) as z from v1, v1 as t2 where t2.b=v1.b and t2.c=v1.c group by v1.b,v1.c; z 0.9092974268256817 0.9092974268256817 -0.7568024953079282 -0.7568024953079282 # With materialized view we get more dependencies than needed, due to implementation. select t3.a from v1, v1 as t2, v1 as t3 where t3.b=t2.b and t3.c=v1.d and t2.b=v1.b and t2.c=v1.c group by v1.b,v1.c; a SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "v1.b", "v1.c", "t2.b", "t2.c", "t3.b", "v1.d", "t3.c", "t3.a" ] /* columns */, "searched_in_materialized_tables": [ { "table": "`v1`", "all_columns_of_table_map_bits": [ 0 ] /* all_columns_of_table_map_bits */, "columns": [ "test.t1.b", "test.t1.c" ] /* columns */ }, { "table": "`v1` `t2`", "columns": [ "test.t1.b", "test.t1.c" ] /* columns */ }, { "table": "`v1` `t3`", "all_columns_of_table_map_bits": [ 0 ] /* all_columns_of_table_map_bits */, "columns": [ "test.t1.b", "test.t1.c" ] /* columns */ } ] /* searched_in_materialized_tables */ } # If we simply went to real_item(), we would have WHERE 2*a=b, or # GROUP BY 2*t1.a, so we would not find FDs. The original item # (direct_view_ref here) must also be considered! select a from v1 where a=b group by b; a SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "v1.b", "v1.a" ] /* columns */, "searched_in_materialized_tables": [ { "table": "`v1`", "columns": [ "test.t1.b" ] /* columns */ } ] /* searched_in_materialized_tables */ } select b from v1 where a=b group by a; b SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "v1.a", "v1.b" ] /* columns */, "searched_in_materialized_tables": [ { "table": "`v1`", "columns": [ "test.t1.b" ] /* columns */ } ] /* searched_in_materialized_tables */ } select v1.c from v1 where v1.c=v1.a group by v1.a; c SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "v1.a", "v1.c" ] /* columns */, "searched_in_materialized_tables": [ { "table": "`v1`", "columns": [ "test.t1.c" ] /* columns */ } ] /* searched_in_materialized_tables */ } select v1.a from v1 group by v1.e; a 2 4 SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "v1.e", "v1.a" ] /* columns */, "searched_in_materialized_tables": [ { "table": "`v1`", "columns": [ "test.t1.a" ] /* columns */ } ] /* searched_in_materialized_tables */ } select v1.c from v1 where v1.c=v1.a group by v1.e; c SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "v1.e", "v1.a", "v1.c" ] /* columns */, "searched_in_materialized_tables": [ { "table": "`v1`", "columns": [ "test.t1.a", "test.t1.c" ] /* columns */ } ] /* searched_in_materialized_tables */ } # View appears only in WHERE select t2.d from v1, t1 as t2 where v1.a=t2.d and v1.e=t2.a group by t2.a; d SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "test.t2.a", "v1.e", "v1.a", "test.t2.d" ] /* columns */, "searched_in_materialized_tables": [ { "table": "`v1`", "columns": [ "test.t1.a" ] /* columns */ } ] /* searched_in_materialized_tables */ } drop view if exists v1; # FD due to view's WHERE: create algorithm=temptable view v1 as select t1.a*2 as a, t1.b as b from t1; select a from v1 group by b; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'v1.a' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by drop view if exists v1; # Materialized view create algorithm=temptable view v1 as select t1.a*2 as a, t1.b as b from t1 where t1.a=t1.b; select a from v1 group by b; a SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "v1.b", "v1.a" ] /* columns */, "searched_in_materialized_tables": [ { "table": "`v1`", "columns": [ "test.t1.b", "test.t1.a" ] /* columns */ } ] /* searched_in_materialized_tables */ } drop view if exists v1; # Aggregates in view # Materialized view create algorithm=temptable view v1 as select sum(t1.a) as a, sum(t1.b) as b from t1; select a from v1 group by b; a 6 SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "all_columns_of_table_map_bits": [ 0 ] /* all_columns_of_table_map_bits */, "columns": [ "v1.b" ] /* columns */, "searched_in_materialized_tables": [ { "table": "`v1`" } ] /* searched_in_materialized_tables */ } drop view if exists v1; # Aggregates + GROUP BY in view # We group by b*5, to show that it works with GROUP expressions, not only fields. # Materialized view create algorithm=temptable view v1 as select a, b*5 as b, sum(t1.c) as c, sum(t1.d) as d from t1 group by a,b*5; select a from v1 group by b; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'v1.a' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select c from v1 group by b; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'v1.c' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select c from v1 group by b,d; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'v1.c' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select a,c from v1 group by a; ERROR 42000: Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'v1.c' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select d,c from v1 group by b,a; d c NULL 0 NULL 0 NULL 0 NULL 0 SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "all_columns_of_table_map_bits": [ 0 ] /* all_columns_of_table_map_bits */, "columns": [ "v1.b", "v1.a" ] /* columns */, "searched_in_materialized_tables": [ { "table": "`v1`", "columns": [ "test.t1.a" ] /* columns */, "all_group_expressions": true } ] /* searched_in_materialized_tables */ } drop view if exists v1; set optimizer_switch=@optimizer_switch_saved; set @optimizer_switch_saved=@@optimizer_switch; # Materialized derived table set optimizer_switch='derived_merge=off'; select sin(a) as z from (select t1.a*2 as a, t1.b as b, t1.c as c, t1.d as d, t1.a as e from t1) as v1 group by b; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'v1.a' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select sin(a) as z from (select t1.a*2 as a, t1.b as b, t1.c as c, t1.d as d, t1.a as e from t1) as v1 group by d,b; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'v1.a' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select sin(a) as z from (select t1.a*2 as a, t1.b as b, t1.c as c, t1.d as d, t1.a as e from t1) as v1 group by c,b; z 0.9092974268256817 0.9092974268256817 -0.7568024953079282 -0.7568024953079282 select (select sin(a)) as z from (select t1.a*2 as a, t1.b as b, t1.c as c, t1.d as d, t1.a as e from t1) as v1 group by d,b; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'v1.a' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select (select sin(a)) as z from (select t1.a*2 as a, t1.b as b, t1.c as c, t1.d as d, t1.a as e from t1) as v1 group by c,b; z 0.9092974268256817 0.9092974268256817 -0.7568024953079282 -0.7568024953079282 select sin(a) as z from t1 group by c*2,b*2; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.t1.a' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select sin(a+b*c) as z from (select t1.a*2 as a, t1.b as b, t1.c as c, t1.d as d, t1.a as e from t1) as v1 group by c,b; z 0.9092974268256817 0.9092974268256817 -0.7568024953079282 -0.7568024953079282 SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "v1.c", "v1.b", "v1.a" ] /* columns */, "searched_in_materialized_tables": [ { "table": " `v1`", "all_columns_of_table_map_bits": [ 0 ] /* all_columns_of_table_map_bits */, "columns": [ "test.t1.c", "test.t1.b" ] /* columns */ } ] /* searched_in_materialized_tables */ } select sin(a) as z from (select t1.a*2 as a, t1.b as b, t1.c as c, t1.d as d, t1.a as e from t1) as v1 where b=2 group by c; z # {v1.b,v1.c}->v1.a->t2.a select sin(t2.a) as z from (select t1.a*2 as a, t1.b as b, t1.c as c, t1.d as d, t1.a as e from t1) as v1, (select t1.a*2 as a, t1.b as b, t1.c as c, t1.d as d, t1.a as e from t1) as t2 where t2.a=v1.a group by v1.b,v1.c; z 0.9092974268256817 0.9092974268256817 -0.7568024953079282 -0.7568024953079282 SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "v1.b", "v1.c", "v1.a", "t2.a" ] /* columns */, "searched_in_materialized_tables": [ { "table": " `v1`", "all_columns_of_table_map_bits": [ 0 ] /* all_columns_of_table_map_bits */, "columns": [ "test.t1.b", "test.t1.c" ] /* columns */ }, { "table": " `t2`" } ] /* searched_in_materialized_tables */ } select sin(t2.a) as z from (select t1.a*2 as a, t1.b as b, t1.c as c, t1.d as d, t1.a as e from t1) as v1, (select t1.a*2 as a, t1.b as b, t1.c as c, t1.d as d, t1.a as e from t1) as t2 where t2.b=v1.b and t2.c=v1.c group by v1.b,v1.c; z 0.9092974268256817 0.9092974268256817 -0.7568024953079282 -0.7568024953079282 # With materialized view we get more dependencies than needed, due to implementation. select t3.a from (select t1.a*2 as a, t1.b as b, t1.c as c, t1.d as d, t1.a as e from t1) as v1, (select t1.a*2 as a, t1.b as b, t1.c as c, t1.d as d, t1.a as e from t1) as t2, (select t1.a*2 as a, t1.b as b, t1.c as c, t1.d as d, t1.a as e from t1) as t3 where t3.b=t2.b and t3.c=v1.d and t2.b=v1.b and t2.c=v1.c group by v1.b,v1.c; a SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "v1.b", "v1.c", "t2.b", "t2.c", "t3.b", "v1.d", "t3.c", "t3.a" ] /* columns */, "searched_in_materialized_tables": [ { "table": " `v1`", "all_columns_of_table_map_bits": [ 0 ] /* all_columns_of_table_map_bits */, "columns": [ "test.t1.b", "test.t1.c" ] /* columns */ }, { "table": " `t2`", "columns": [ "test.t1.b", "test.t1.c" ] /* columns */ }, { "table": " `t3`", "all_columns_of_table_map_bits": [ 0 ] /* all_columns_of_table_map_bits */, "columns": [ "test.t1.b", "test.t1.c" ] /* columns */ } ] /* searched_in_materialized_tables */ } # If we simply went to real_item(), we would have WHERE 2*a=b, or # GROUP BY 2*t1.a, so we would not find FDs. The original item # (direct_view_ref here) must also be considered! select a from (select t1.a*2 as a, t1.b as b, t1.c as c, t1.d as d, t1.a as e from t1) as v1 where a=b group by b; a SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "v1.b", "v1.a" ] /* columns */, "searched_in_materialized_tables": [ { "table": " `v1`", "columns": [ "test.t1.b" ] /* columns */ } ] /* searched_in_materialized_tables */ } select b from (select t1.a*2 as a, t1.b as b, t1.c as c, t1.d as d, t1.a as e from t1) as v1 where a=b group by a; b SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "v1.a", "v1.b" ] /* columns */, "searched_in_materialized_tables": [ { "table": " `v1`", "columns": [ "test.t1.b" ] /* columns */ } ] /* searched_in_materialized_tables */ } select v1.c from (select t1.a*2 as a, t1.b as b, t1.c as c, t1.d as d, t1.a as e from t1) as v1 where v1.c=v1.a group by v1.a; c SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "v1.a", "v1.c" ] /* columns */, "searched_in_materialized_tables": [ { "table": " `v1`", "columns": [ "test.t1.c" ] /* columns */ } ] /* searched_in_materialized_tables */ } select v1.a from (select t1.a*2 as a, t1.b as b, t1.c as c, t1.d as d, t1.a as e from t1) as v1 group by v1.e; a 2 4 SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "v1.e", "v1.a" ] /* columns */, "searched_in_materialized_tables": [ { "table": " `v1`", "columns": [ "test.t1.a" ] /* columns */ } ] /* searched_in_materialized_tables */ } select v1.c from (select t1.a*2 as a, t1.b as b, t1.c as c, t1.d as d, t1.a as e from t1) as v1 where v1.c=v1.a group by v1.e; c SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "v1.e", "v1.a", "v1.c" ] /* columns */, "searched_in_materialized_tables": [ { "table": " `v1`", "columns": [ "test.t1.a", "test.t1.c" ] /* columns */ } ] /* searched_in_materialized_tables */ } # View appears only in WHERE select t2.d from (select t1.a*2 as a, t1.b as b, t1.c as c, t1.d as d, t1.a as e from t1) as v1, t1 as t2 where v1.a=t2.d and v1.e=t2.a group by t2.a; d SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "test.t2.a", "v1.e", "v1.a", "test.t2.d" ] /* columns */, "searched_in_materialized_tables": [ { "table": " `v1`", "columns": [ "test.t1.a" ] /* columns */ } ] /* searched_in_materialized_tables */ } drop view if exists v1; Warnings: Note 1051 Unknown table 'test.v1' # FD due to view's WHERE: select a from (select t1.a*2 as a, t1.b as b from t1) as v1 group by b; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'v1.a' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by drop view if exists v1; Warnings: Note 1051 Unknown table 'test.v1' # Derived table select a from (select t1.a*2 as a, t1.b as b from t1 where t1.a=t1.b) as v1 group by b; a SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "v1.b", "v1.a" ] /* columns */, "searched_in_materialized_tables": [ { "table": " `v1`", "columns": [ "test.t1.b", "test.t1.a" ] /* columns */ } ] /* searched_in_materialized_tables */ } drop view if exists v1; Warnings: Note 1051 Unknown table 'test.v1' # Aggregates in view # Derived table select a from (select sum(t1.a) as a, sum(t1.b) as b from t1) as v1 group by b; a 6 SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "all_columns_of_table_map_bits": [ 0 ] /* all_columns_of_table_map_bits */, "columns": [ "v1.b" ] /* columns */, "searched_in_materialized_tables": [ { "table": " `v1`" } ] /* searched_in_materialized_tables */ } drop view if exists v1; Warnings: Note 1051 Unknown table 'test.v1' # Aggregates + GROUP BY in view # We group by b*5, to show that it works with GROUP expressions, not only fields. # Derived table select a from (select a, b*5 as b, sum(t1.c) as c, sum(t1.d) as d from t1 group by a,b*5) as v1 group by b; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'v1.a' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select c from (select a, b*5 as b, sum(t1.c) as c, sum(t1.d) as d from t1 group by a,b*5) as v1 group by b; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'v1.c' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select c from (select a, b*5 as b, sum(t1.c) as c, sum(t1.d) as d from t1 group by a,b*5) as v1 group by b,d; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'v1.c' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select a,c from (select a, b*5 as b, sum(t1.c) as c, sum(t1.d) as d from t1 group by a,b*5) as v1 group by a; ERROR 42000: Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'v1.c' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select d,c from (select a, b*5 as b, sum(t1.c) as c, sum(t1.d) as d from t1 group by a,b*5) as v1 group by b,a; d c NULL 0 NULL 0 NULL 0 NULL 0 SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "all_columns_of_table_map_bits": [ 0 ] /* all_columns_of_table_map_bits */, "columns": [ "v1.b", "v1.a" ] /* columns */, "searched_in_materialized_tables": [ { "table": " `v1`", "columns": [ "test.t1.a" ] /* columns */, "all_group_expressions": true } ] /* searched_in_materialized_tables */ } drop view if exists v1; Warnings: Note 1051 Unknown table 'test.v1' set optimizer_switch=@optimizer_switch_saved; # Derived table in merged view create algorithm=temptable view v2 as select a as a, 2*a as b from t1; create algorithm=merge view v1 as select v2.a as a, 3*v2.b as b from v2; select v1.b from v1 group by v1.a; b 6 12 SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "v1.a", "v2.b", "v1.b" ] /* columns */, "searched_in_materialized_tables": [ { "table": "`v2`", "columns": [ "test.t1.a" ] /* columns */ } ] /* searched_in_materialized_tables */ } select t2.a from t1 as t2, v1 where t2.a=v1.b group by v1.a; a SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "v1.a", "v2.b", "v1.b", "test.t2.a" ] /* columns */, "searched_in_materialized_tables": [ { "table": "`v2`", "columns": [ "test.t1.a" ] /* columns */ } ] /* searched_in_materialized_tables */ } # FDs in a view are those of the underlying query expression. # FDs in a query expression: expressions in the SELECT list must be # deterministic. drop view v1; create algorithm=merge view v1 as select v2.a as a, rand()*v2.b as b from v2; select v1.b from v1 group by v1.a; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'v1.b' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by drop view v1; create algorithm=temptable view v1 as select v2.a as a, rand()*v2.b as b from v2; select v1.b from v1 group by v1.a; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'v1.b' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by drop view v1,v2; # Item_direct_view_ref pointing to Item_direct_view_ref pointing to # Item_field (a rare case!) create algorithm=merge view v2 as select 2*a as a, 2*b as b from t1; create algorithm=merge view v1 as select a, 3*b as b from v2 where a=b; select 1 from (select a,b+0 from v1 group by a) as d; 1 drop view v1,v2; # Some fun cases with aggregates in derived table. # Inner query is valid: t1.a -> t1.b (equality in WHERE). Outer query: # d.b -> t1.b (underlying column of d.b) -> t1.a (equality) # -> sum(1) (because t1.a is all group columns so determines # sum()) -> d.s (because sum() is underlying of d.s) select d.s from (select b, sum(1) as s from t1 where a=b group by a) as d group by d.b; s alter table t1 add column pk int primary key auto_increment; # Inner query: t1.pk -> t1.* (pk). Outer query: # d.b,d.c -> t1.b,t1.c (their underlying columns) -> t1.pk (because # t1.b,t1.c is unique) -> sum(1) (because t1.pk is all group columns so # determines sum()) -> d.s (because sum() is underlying of d.s) select d.s from (select b, c, sum(d) as s from t1 group by pk) as d group by d.b,d.c; s NULL NULL NULL NULL # Outer query: # d.c -> t1.b*3 (underlying column of d.c) -> sum(a) (because t1.b*3 # is all group expressions) -> d.s select d.s from (select b*3 as c, sum(a) as s from t1 group by b*3) as d group by d.c; s 1 1 2 2 drop table t1,t2; # Testcase from Reviewers create table customer1(pk int primary key, a int); create table customer2(pk int primary key, b int); CREATE algorithm=merge VIEW customer as SELECT pk,a,b FROM customer1 JOIN customer2 USING (pk); select customer.pk, customer.b from customer group by customer.pk; pk b # View is merged. Show FDs. Note that in --ps-protocol, the trace # is that of execution, so contains no group-by checks. SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "all_columns_of_table_map_bits": [ 0, 1 ] /* all_columns_of_table_map_bits */, "columns": [ "customer.pk", "test.customer2.pk" ] /* columns */ } drop view customer; CREATE algorithm=temptable VIEW customer as SELECT pk,a,b FROM customer1 JOIN customer2 USING (pk); select customer.pk, customer.b from customer group by customer.pk; pk b SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "customer.pk", "customer.b" ] /* columns */, "searched_in_materialized_tables": [ { "table": "`customer`", "all_columns_of_table_map_bits": [ 0, 1 ] /* all_columns_of_table_map_bits */, "columns": [ "test.customer1.pk", "test.customer2.pk" ] /* columns */ } ] /* searched_in_materialized_tables */ } # Benefit from outer-join-to-inner conversion. insert into customer1 values(0,10),(1,20); insert into customer2 values(0,10),(1,20); # 1) no conversion, no FD from customer2.b to customer1.a. explain select customer1.a, count(*) from customer1 left join customer2 on customer1.a=customer2.b where customer1.pk in (7,9) group by customer2.b; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.customer1.a' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by # 2) null-complemented row can't pass WHERE => conversion # => FD from customer2.b to customer1.a. explain select customer1.a, count(*) from customer1 left join customer2 on customer1.a=customer2.b where customer2.pk in (7,9) group by customer2.b; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE customer1 NULL ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort 1 SIMPLE customer2 NULL range PRIMARY PRIMARY 4 NULL 2 50.00 Using where; Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select `test`.`customer1`.`a` AS `a`,count(0) AS `count(*)` from `test`.`customer1` join `test`.`customer2` where ((`test`.`customer2`.`b` = `test`.`customer1`.`a`) and (`test`.`customer2`.`pk` in (7,9))) group by `test`.`customer2`.`b` drop table customer1,customer2; drop view customer; # FDs of JOIN...USING and NATURAL JOIN create table t1(pk int primary key, a int); create table t2(pk int primary key, b int); select t1.pk, t1.a from t1 join t2 on t1.pk=t2.pk group by t1.pk; pk a select t1.pk, t1.a from t1 join t2 using(pk) group by t1.pk; pk a select t1.pk, t1.a from t1 natural join t2 group by t1.pk; pk a select t1.pk, t1.a from t1 left join t2 using(pk) group by t1.pk; pk a select t1.pk, t1.a from t1 natural left join t2 group by t1.pk; pk a select t1.pk, t2.b from t1 join t2 on t1.pk=t2.pk group by t1.pk; pk b select t1.pk, t2.b from t1 join t2 using(pk) group by t1.pk; pk b select t1.pk, t2.b from t1 natural join t2 group by t1.pk; pk b select t1.pk, t2.b from t1 left join t2 using(pk) group by t1.pk; pk b SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "all_columns_of_table_map_bits": [ 0, 1 ] /* all_columns_of_table_map_bits */, "columns": [ "test.t1.pk", "test.t2.pk" ] /* columns */ } select t1.pk, t2.b from t1 natural left join t2 group by t1.pk; pk b # Equivalent queries, with RIGHT JOIN select t1.pk, t2.b from t2 right join t1 using(pk) group by t1.pk; pk b select t1.pk, t2.b from t2 natural right join t1 group by t1.pk; pk b select t1.pk, t2.b from t1 left join t2 on t1.pk>t2.pk group by t1.pk; ERROR 42000: Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.t2.b' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by # Even in --ps-protocol we see the group-by checks in trace because # there has been no execution (due to error). SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "all_columns_of_table_map_bits": [ 0 ] /* all_columns_of_table_map_bits */, "columns": [ "test.t1.pk" ] /* columns */ } select t1.pk, t2.b from t2 right join t1 on t1.pk>t2.pk group by t1.pk; ERROR 42000: Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.t2.b' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by drop table t1,t2; # Cases where FDs from weak side do not propagate create table t1(a int, b int); insert into t1 values(null,0),(null,1); select d.a,d.c from t1 left join (select a, coalesce(a,3) as c from t1) as d on t1.b>0; a c NULL 3 NULL 3 NULL NULL # Now group it by d.a: select d.a,d.c from t1 left join (select a, coalesce(a,3) as c from t1) as d on t1.b>0 group by d.a; ERROR 42000: Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'd.c' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "d.a" ] /* columns */ } select d.a,d.c from t1 left join (select a, count(a) as c from t1 group by a) as d on t1.b+d.c>0; a c NULL 0 NULL NULL # Now group it by d.a: select d.a,d.c from t1 left join (select a, count(a) as c from t1 group by a) as d on t1.b+d.c>0 group by d.a; ERROR 42000: Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'd.c' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "d.a" ] /* columns */, "searched_in_materialized_tables": [ { "table": " `d`", "columns": [ "test.t1.a" ] /* columns */, "all_group_expressions": true } ] /* searched_in_materialized_tables */ } select d.m,d.c from t1 left join (select max(a) as m, count(a) as c from t1) as d on t1.b+d.c>0; m c NULL 0 NULL NULL # Now group it by d.m: select d.m,d.c from t1 left join (select max(a) as m, count(a) as c from t1) as d on t1.b+d.c>0 group by d.m; ERROR 42000: Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'd.c' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "columns": [ "d.m" ] /* columns */, "searched_in_materialized_tables": [ { "table": " `d`" } ] /* searched_in_materialized_tables */ } # Now group it by d.c which is non-nullable: select d.m,d.c from t1 left join (select max(a) as m, count(a) as c from t1) as d on t1.b+d.c>0 group by d.c; m c NULL NULL NULL 0 SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "all_columns_of_table_map_bits": [ 1 ] /* all_columns_of_table_map_bits */, "columns": [ "d.c" ] /* columns */, "searched_in_materialized_tables": [ { "table": " `d`" } ] /* searched_in_materialized_tables */ } drop table t1; create table t1(pk int primary key, a int); # Not valid per the standard, because: # 1) In t3, t3.pk->t3.a holds. # 2) In R1 the result of "(t2 left join t3 on 1)", t3.pk->t3.a # holds, by application of: there is a functional dependency in the # weak side t3, and t3.pk is not nullable in t3. # 3) In R2 the result of "t1 left join (t2 left join t3 on 1) on 1", # t3.pk->t3.a doesn't hold anymore, because: it's a dependency in the # weak side (weak side is R1), and t3.pk is nullable _when # seen as a column of R1_ (in R1 t3.pk can be NULL, if the row of t3 # is actually a null-complemented one). # But for us it is valid, because we have refined the logic: the # pk-based FD satisfies the requirement that a NULL value of t3.pk # implies a NULL value of t3.a (indeed, the NULL value of t3.pk can # only come from null-complementing of the row of t3 in R1, in which # case t3.a is also NULL). select t3.a from t1 left join (t1 as t2 left join t1 as t3 on 1) on 1 group by t3.pk; a SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) "functional_dependencies_of_GROUP_columns": { "all_columns_of_table_map_bits": [ 2 ] /* all_columns_of_table_map_bits */, "columns": [ "test.t3.pk" ] /* columns */ } # Outer reference - why we use resolved_used_tables(): select (select t1.a from t1 as t2 limit 1) from t1 group by pk; (select t1.a from t1 as t2 limit 1) # We don't build the FD list if not needed select t1.a*3 from t1 group by t1.a; t1.a*3 SELECT show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) FROM INFORMATION_SCHEMA.OPTIMIZER_TRACE; show_json_object('"functional_dependencies_of_GROUP_columns": {', TRACE) NOT FOUND drop table t1; # Tricky cases with "ON col=literal" propagating. create table t1(a int, b int); insert into t1 values(); insert into t1 values(10,11); create table t2(c int, d int); insert into t2 values(2,3); select t4.d from t1 left join (t2 as t3 join t2 as t4 on t4.d=3) on t1.a=10; d 3 NULL # Equivalent to T1 LJ (T2, T3) ON T4.D=3 AND T1.A=10 # (this is what simplify_joins() does). # For T4.D=3, DJS is {T1.A} which is not group column. select t4.d from t1 left join (t2 as t3 join t2 as t4 on t4.d=3) on t1.a=10 group by ""; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.t4.d' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select t4.d from t1 left join (t2 as t3 left join t2 as t4 on t4.d=3) on t1.a=10; d 3 NULL # For T4.D=3, DJS={}, not NULL-friendly, and embedding is on weak side # so FD cannot propagate. select t4.d from t1 left join (t2 as t3 left join t2 as t4 on t4.d=3) on t1.a=10 group by ""; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.t4.d' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by select t4.d from t1 join (t2 as t3 left join t2 as t4 on t4.d=3) on t1.a=10; d 3 # For T4.D=3, DJS={}, not NULL-friendly, but embedding is on weak side # so FD can propagate. select t4.d from t1 join (t2 as t3 left join t2 as t4 on t4.d=3) on t1.a=10 group by ""; d 3 # With a view create view v1 as select a as a, 2*a as b, coalesce(a,3) as c from t1; select v1.b from t1 left join v1 on 1; b NULL NULL 20 20 # If v1.a is NULL then v1.b is NULL: a->b is NULL-friendly select v1.b from t1 left join v1 on 1 group by v1.a; b NULL 20 select v1.c from t1 left join v1 on 1; c 3 3 10 10 # If v1.a is NULL then v1.c may not be NULL: a->c is not NULL-friendly select v1.c from t1 left join v1 on 1 group by v1.a; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'v1.c' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by drop view v1; # Constant view item create view v1 as select a as a, 2 as b from t1; # Because of BUG#17023060, the result is wrong, should be # [10,2 ; 10,2 ; NULL,NULL], which would show that {}->{v1.b} does not # hold in the result, even though v1.b is constant (=2) in v1. select t1.a, v1.b from t1 left join v1 on t1.a is not null; a b 10 2 10 2 NULL NULL # We correctly reject this: select t1.a, v1.b from t1 left join v1 on t1.a is not null group by v1.a; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.t1.a' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by drop view v1; drop table t1,t2; create table emp(empno int, ename char(1), deptno int); create table dept(deptno int primary key, dname char(1)); CREATE algorithm=merge VIEW empdept AS SELECT emp.empno, emp.ename, dept.deptno, dept.dname FROM emp LEFT OUTER JOIN dept ON (emp.deptno = dept.deptno); EXPLAIN SELECT dname, COUNT(*) FROM empdept GROUP BY deptno; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE emp NULL ALL NULL NULL NULL NULL 1 100.00 Using temporary; Using filesort 1 SIMPLE dept NULL eq_ref PRIMARY PRIMARY 4 test.emp.deptno 1 100.00 NULL Warnings: Note 1003 /* select#1 */ select `test`.`dept`.`dname` AS `dname`,count(0) AS `COUNT(*)` from `test`.`emp` left join `test`.`dept` on((`test`.`dept`.`deptno` = `test`.`emp`.`deptno`)) where 1 group by `test`.`dept`.`deptno` # There is pk-based FD dept.Depno->dept.dname in dept # and it propagates in the view-which-became-nest because it is # NULL-friendly. SELECT dname, COUNT(*) FROM empdept GROUP BY deptno; dname COUNT(*) drop view empdept; CREATE algorithm=temptable VIEW empdept AS SELECT emp.empno, emp.ename, dept.deptno, dept.dname FROM emp LEFT OUTER JOIN dept ON (emp.deptno = dept.deptno); EXPLAIN SELECT dname, COUNT(*) FROM empdept GROUP BY deptno; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 PRIMARY <derived2> NULL ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort 2 DERIVED emp NULL ALL NULL NULL NULL NULL 1 100.00 NULL 2 DERIVED dept NULL eq_ref PRIMARY PRIMARY 4 test.emp.deptno 1 100.00 NULL Warnings: Note 1003 /* select#1 */ select `empdept`.`dname` AS `dname`,count(0) AS `COUNT(*)` from `test`.`empdept` group by `empdept`.`deptno` # There is pk-based FD dept.Depno->dept.dname in dept # and it propagates in the materialized view because it is # NULL-friendly, and then in the top query because the view is not in # the weak side of an outer join. SELECT dname, COUNT(*) FROM empdept GROUP BY deptno; dname COUNT(*) # More tests, for code coverage. # UNION in derived table select emp.ename from (select 1 as empno union select 2) deriv, emp where emp.empno=deriv.empno group by emp.empno; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.emp.ename' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by drop view empdept; # Make the key-searching loop meet view columns which don't wrap a # column (CONCAT). CREATE VIEW empdept AS SELECT emp.empno, emp.ename, dept.deptno, concat("",dept.dname) as dname FROM emp LEFT JOIN dept ON (emp.deptno = dept.deptno); SELECT ename, COUNT(*) FROM empdept WHERE empno=dname and empno=deptno GROUP BY empno; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'empdept.ename' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by drop table emp,dept; drop view empdept; # # Bug#19636980 ASSERT `TABLE->OUTER_JOIN' FAILED IN GROUP_CHECK::FIND_FD_IN_JOINED_TABLE # CREATE TABLE t1 ( c1 INT, c2 INT, c4 DATE, c5 VARCHAR(1) ); CREATE TABLE t2 ( c1 INT, c2 INT, c3 INT, c5 VARCHAR(1) ); # alias1.c5 is not FD, the error is detected at SELECT time CREATE VIEW v1 AS SELECT alias1.c4 AS field1 FROM t1 AS alias1 INNER JOIN t1 AS alias2 ON 1 GROUP BY field1 ORDER BY alias1.c5; SELECT * FROM v1; ERROR 42000: Expression #1 of ORDER BY clause is not in GROUP BY clause and contains nonaggregated column 'test.alias1.c5' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by DROP VIEW v1; # alias1.c5 is FD (WHERE contains: alias1.c5='d') CREATE VIEW v1 AS SELECT alias1.c4 AS field1, alias1.c4 AS field2 FROM t1 AS alias1 INNER JOIN t1 AS alias2 ON (alias2.c1 = alias1.c2) WHERE ( NOT EXISTS ( SELECT SQ1_alias1.c5 AS SQ1_field1 FROM t2 AS SQ1_alias1 WHERE SQ1_alias1.c3 < alias1.c1 )) AND (alias1.c5 = alias1.c5 AND alias1.c5 = 'd' ) GROUP BY field1, field2 ORDER BY alias1.c5, field1, field2 ; SELECT * FROM v1; field1 field2 DROP VIEW v1; DROP TABLE t1,t2; # # Bug#19636409 ASSERT `(MAP_OF_NEW_EQ_FDS...` IN GROUP_CHECK::IS_FD_ON_SOURCE ON SELECT # CREATE TABLE t1 ( pk int NOT NULL, c1 datetime, c2 varchar(1), c3 date, c4 date, c5 varchar(1), PRIMARY KEY (pk) ); CREATE VIEW v1 AS SELECT c3 AS subfield11, pk AS subfield12, c2 AS subfield13 FROM t1 GROUP BY subfield11, subfield12 ; # This query is valid. Indeed: field3 i.e. t1.c2 is part of GROUP BY, # so, in a group: # - all rows have the same value of t1.c2, noted val_c2, # - so all rows, which necessarily match WHERE, matched with a row of # v1 having subfield11=val_c2 and subfield12=val_c2 (due to IN # predicate), # - thus both grouping columns of v1's query expression are constant # (to val_c2) # - thus v1.subfield13 is constant too (grouping columns determine the # SELECT list) # - so, due to IN, this determines the value of t1.pk (t1 is the top # query's table). # - so t1.pk is constant, so all columns of t1 are constant. # Which proves that it makes sense to search FDs in semijoin # equalities. # In other words: a semijoin is like a join except that it eliminates # duplicates, but duplicates are irrelevant to the decision whether a # column is functionally dependent on a set of columns. SELECT c5 AS field1, c4 AS field2, c2 AS field3, c1 AS field4 FROM t1 WHERE ( c2, c2, pk ) IN ( SELECT * FROM v1 ) GROUP BY field1, field3, field3; field1 field2 field3 field4 # # Bug#19687724 FUNCTIONAL DEPENDENCIES ARE NOT RECOGNIZED IN EQUALITIES BETWEEN ROWS # # Inspired by query above, but with a join: SELECT c5 AS field1, c4 AS field2, c2 AS field3, c1 AS field4 FROM t1, v1 WHERE ( c2, c2, pk ) = (subfield11, subfield12, subfield13) GROUP BY field1, field3, field3; field1 field2 field3 field4 # With constants: SELECT c5 AS field1, c4 AS field2, c2 AS field3, c1 AS field4 FROM t1 WHERE ( c2, c2, pk ) = (1, 2, 3) GROUP BY field1, field3, field3; field1 field2 field3 field4 DROP TABLE t1; CREATE TABLE t1(a INT, b INT, c INT, d INT); SELECT a,b,c,d FROM t1 WHERE a=c AND b=d GROUP by a,b; a b c d SELECT a,b,c,d FROM t1 WHERE (a,b)=(c,d) GROUP BY a,b; a b c d SELECT a,b,c,d FROM t1 WHERE (a,b)=(c,d+1) GROUP BY a,b; ERROR 42000: Expression #4 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.t1.d' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by DROP TABLE t1; DROP VIEW v1; # # Bug #20031708 ASSERT ON GROUP_CHECK::IS_FD_ON_SOURCE # CREATE TABLE t1 ( col_varchar_10_utf8 VARCHAR(10) CHARACTER SET utf8, col_int_key INT, pk INT PRIMARY KEY ); CREATE TABLE t2 ( col_varchar_10_utf8 VARCHAR(10) CHARACTER SET utf8 DEFAULT NULL, col_int_key INT DEFAULT NULL, pk INT PRIMARY KEY ); CREATE VIEW v2 AS SELECT * FROM t2; # The reporter's testcase: SELECT COUNT(*), t1.col_int_key FROM v2 LEFT OUTER JOIN t1 ON v2.col_varchar_10_utf8 = t1.col_varchar_10_utf8 WHERE v2.pk = 4; ERROR 42000: In aggregated query without GROUP BY, expression #2 of SELECT list contains nonaggregated column 'test.t1.col_int_key'; this is incompatible with sql_mode=only_full_group_by DROP VIEW v2; # A variant: one column is an expression: CREATE VIEW v2 AS SELECT CONCAT(col_varchar_10_utf8,' ') AS col_varchar_10_utf8, col_int_key, pk FROM t2; SELECT COUNT(*), t1.col_int_key FROM v2 LEFT OUTER JOIN t1 ON v2.col_varchar_10_utf8 = t1.col_varchar_10_utf8 WHERE v2.pk = 4; ERROR 42000: In aggregated query without GROUP BY, expression #2 of SELECT list contains nonaggregated column 'test.t1.col_int_key'; this is incompatible with sql_mode=only_full_group_by DROP VIEW v2; # Query used in the commit comment: view column involving two tables CREATE VIEW v2 AS SELECT t1.pk, t2.col_int_key+1 as c, t1.pk+t2.col_int_key as p FROM t1, t2; # FDs will be discovered in this order: {}->v2.pk, v2.pk->v2.c, # v2.c->v2.p SELECT COUNT(*), v2.p FROM v2 WHERE v2.c=v2.p and v2.c=v2.pk AND v2.pk = 4; COUNT(*) p 0 NULL DROP VIEW v2; # If in the query specification defining a view, a base table's pk is # determined, # and the view's column is a function of this base table's columns, # then the view's column is also determined. # So, in this view's result, {v2.pk}->{v2.coa}: CREATE ALGORITHM=MERGE VIEW v2 AS SELECT t2.pk, COALESCE(t2.pk, 3) AS coa FROM t1 LEFT JOIN t2 ON 0; # And thus {pk}->{coa} holds in the result of this query using the view; # if there is NULL-complementing in the LEFT JOIN below then (pk,coa) # will be (NULL,NULL) and if there is not it will be (non-NULL,3): # v2.coa is determined by v2.pk. The key fact is that v2.pk is not # NULLable so this is a NFFD. SELECT v2.pk, v2.coa FROM t1 LEFT JOIN v2 AS v2 ON 0 GROUP BY v2.pk; pk coa DROP VIEW v2; DROP TABLE t1,t2; # # Bug#21807579 FUNCTIONAL DEPENDENCIES ARE NOT RECOGNIZED IN GENERATED COLUMNS # CREATE TABLE t ( a INT, c INT GENERATED ALWAYS AS (a+2), d INT GENERATED ALWAYS AS (c+2) ); # {a}->{c}, {c}->{d} and {a}->{d} hold. SELECT c FROM t GROUP BY a; c SELECT d FROM t GROUP BY c; d SELECT d FROM t GROUP BY a; d SELECT 1+c FROM t GROUP BY a; 1+c SELECT 1+d FROM t GROUP BY c; 1+d SELECT 1+d FROM t GROUP BY a; 1+d # {t2.a}->{t2.d}->{t1.c}->{t1.d} SELECT t1.d FROM t as t1, t as t2 WHERE t2.d=t1.c GROUP BY t2.a; d SELECT t1.d FROM t as t1, t as t2 WHERE t2.d>t1.c GROUP BY t2.a; ERROR 42000: Expression #1 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.t1.d' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by DROP TABLE t; # A non-NULL-friendly dependency. CREATE TABLE t ( a INT, c INT GENERATED ALWAYS AS (COALESCE(a,3)) ); INSERT INTO t (a) VALUES(NULL); CREATE TABLE u ( a INT ); INSERT INTO u VALUES(0),(1); # Even though {a}->{c} holds in 't', it doesn't propagate to the left # join's result SELECT t.a,t.c FROM u LEFT JOIN t ON u.a>0; a c NULL 3 NULL NULL SELECT t.a,t.c FROM u LEFT JOIN t ON u.a>0 GROUP BY t.a; ERROR 42000: Expression #2 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'test.t.c' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by DROP TABLE t,u; DROP FUNCTION show_json_object;
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