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 | : 3.137.161.250
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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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wl6219-memory.result
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wl6219-myisam.result
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wl6219-upgrade.result
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xa.result
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xml.result
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Code Editor : join.result
drop table if exists t1,t2,t3; CREATE TABLE t1 (S1 INT); CREATE TABLE t2 (S1 INT); INSERT INTO t1 VALUES (1); INSERT INTO t2 VALUES (2); SELECT * FROM t1 JOIN t2; S1 S1 1 2 SELECT * FROM t1 INNER JOIN t2; S1 S1 1 2 SELECT * from t1 JOIN t2 USING (S1); S1 SELECT * FROM t1 INNER JOIN t2 USING (S1); S1 SELECT * from t1 CROSS JOIN t2; S1 S1 1 2 SELECT * from t1 LEFT JOIN t2 USING(S1); S1 1 SELECT * from t1 LEFT JOIN t2 ON(t2.S1=2); S1 S1 1 2 SELECT * from t1 RIGHT JOIN t2 USING(S1); S1 2 SELECT * from t1 RIGHT JOIN t2 ON(t1.S1=1); S1 S1 1 2 drop table t1,t2; create table t1 (id int primary key); create table t2 (id int); insert into t1 values (75); insert into t1 values (79); insert into t1 values (78); insert into t1 values (77); replace into t1 values (76); replace into t1 values (76); insert into t1 values (104); insert into t1 values (103); insert into t1 values (102); insert into t1 values (101); insert into t1 values (105); insert into t1 values (106); insert into t1 values (107); insert into t2 values (107),(75),(1000); select t1.id, t2.id from t1, t2 where t2.id = t1.id; id id 107 107 75 75 select t1.id, count(t2.id) from t1,t2 where t2.id = t1.id group by t1.id; id count(t2.id) 75 1 107 1 select t1.id, count(t2.id) from t1,t2 where t2.id = t1.id group by t2.id; id count(t2.id) 75 1 107 1 select t1.id,t2.id from t2 left join t1 on t1.id>=74 and t1.id<=0 where t2.id=75 and t1.id is null; id id NULL 75 explain select t1.id,t2.id from t2 left join t1 on t1.id>=74 and t1.id<=0 where t2.id=75 and t1.id is null; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL const PRIMARY NULL NULL NULL 1 100.00 Impossible ON condition 1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 3 33.33 Using where Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`id` AS `id`,`test`.`t2`.`id` AS `id` from `test`.`t2` left join `test`.`t1` on(((`test`.`t1`.`id` >= 74) and (`test`.`t1`.`id` <= 0))) where ((`test`.`t2`.`id` = 75) and isnull(`test`.`t1`.`id`)) explain select t1.id, t2.id from t1, t2 where t2.id = t1.id and t1.id <0 and t1.id > 0; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL no matching row in const table Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`id` AS `id`,`test`.`t2`.`id` AS `id` from `test`.`t1` join `test`.`t2` where ((`test`.`t1`.`id` < 0) and (`test`.`t1`.`id` > 0) and multiple equal(`test`.`t2`.`id`, `test`.`t1`.`id`)) drop table t1,t2; SET sql_mode = 'NO_ENGINE_SUBSTITUTION'; Warnings: Warning 3090 Changing sql mode 'NO_AUTO_CREATE_USER' is deprecated. It will be removed in a future release. CREATE TABLE t1 ( id int(11) NOT NULL auto_increment, token varchar(100) DEFAULT '' NOT NULL, count int(11) DEFAULT '0' NOT NULL, qty int(11), phone char(1) DEFAULT '' NOT NULL, timestamp datetime DEFAULT '0000-00-00 00:00:00' NOT NULL, PRIMARY KEY (id), KEY token (token(15)), KEY timestamp (timestamp), UNIQUE token_2 (token(75),count,phone) ); SET sql_mode = default; INSERT INTO t1 VALUES (21,'e45703b64de71482360de8fec94c3ade',3,7800,'n','1999-12-23 17:22:21'); INSERT INTO t1 VALUES (22,'e45703b64de71482360de8fec94c3ade',4,5000,'y','1999-12-23 17:22:21'); INSERT INTO t1 VALUES (18,'346d1cb63c89285b2351f0ca4de40eda',3,13200,'b','1999-12-23 11:58:04'); INSERT INTO t1 VALUES (17,'ca6ddeb689e1b48a04146b1b5b6f936a',4,15000,'b','1999-12-23 11:36:53'); INSERT INTO t1 VALUES (16,'ca6ddeb689e1b48a04146b1b5b6f936a',3,13200,'b','1999-12-23 11:36:53'); INSERT INTO t1 VALUES (26,'a71250b7ed780f6ef3185bfffe027983',5,1500,'b','1999-12-27 09:44:24'); INSERT INTO t1 VALUES (24,'4d75906f3c37ecff478a1eb56637aa09',3,5400,'y','1999-12-23 17:29:12'); INSERT INTO t1 VALUES (25,'4d75906f3c37ecff478a1eb56637aa09',4,6500,'y','1999-12-23 17:29:12'); INSERT INTO t1 VALUES (27,'a71250b7ed780f6ef3185bfffe027983',3,6200,'b','1999-12-27 09:44:24'); INSERT INTO t1 VALUES (28,'a71250b7ed780f6ef3185bfffe027983',3,5400,'y','1999-12-27 09:44:36'); INSERT INTO t1 VALUES (29,'a71250b7ed780f6ef3185bfffe027983',4,17700,'b','1999-12-27 09:45:05'); CREATE TABLE t2 ( id int(11) NOT NULL auto_increment, category int(11) DEFAULT '0' NOT NULL, county int(11) DEFAULT '0' NOT NULL, state int(11) DEFAULT '0' NOT NULL, phones int(11) DEFAULT '0' NOT NULL, nophones int(11) DEFAULT '0' NOT NULL, PRIMARY KEY (id), KEY category (category,county,state) ); INSERT INTO t2 VALUES (3,2,11,12,5400,7800); INSERT INTO t2 VALUES (4,2,25,12,6500,11200); INSERT INTO t2 VALUES (5,1,37,6,10000,12000); select a.id, b.category as catid, b.state as stateid, b.county as countyid from t1 a, t2 b ignore index (primary) where (a.token ='a71250b7ed780f6ef3185bfffe027983') and (a.count = b.id); id catid stateid countyid 27 2 12 11 28 2 12 11 29 2 12 25 26 1 6 37 select a.id, b.category as catid, b.state as stateid, b.county as countyid from t1 a, t2 b where (a.token = 'a71250b7ed780f6ef3185bfffe027983') and (a.count = b.id) order by a.id; id catid stateid countyid 26 1 6 37 27 2 12 11 28 2 12 11 29 2 12 25 drop table t1, t2; create table t1 (a int primary key); insert into t1 values(1),(2); select t1.a from t1 as t1 left join t1 as t2 using (a) left join t1 as t3 using (a) left join t1 as t4 using (a) left join t1 as t5 using (a) left join t1 as t6 using (a) left join t1 as t7 using (a) left join t1 as t8 using (a) left join t1 as t9 using (a) left join t1 as t10 using (a) left join t1 as t11 using (a) left join t1 as t12 using (a) left join t1 as t13 using (a) left join t1 as t14 using (a) left join t1 as t15 using (a) left join t1 as t16 using (a) left join t1 as t17 using (a) left join t1 as t18 using (a) left join t1 as t19 using (a) left join t1 as t20 using (a) left join t1 as t21 using (a) left join t1 as t22 using (a) left join t1 as t23 using (a) left join t1 as t24 using (a) left join t1 as t25 using (a) left join t1 as t26 using (a) left join t1 as t27 using (a) left join t1 as t28 using (a) left join t1 as t29 using (a) left join t1 as t30 using (a) left join t1 as t31 using (a); a 1 2 select t1.a from t1 as t1 left join t1 as t2 using (a) left join t1 as t3 using (a) left join t1 as t4 using (a) left join t1 as t5 using (a) left join t1 as t6 using (a) left join t1 as t7 using (a) left join t1 as t8 using (a) left join t1 as t9 using (a) left join t1 as t10 using (a) left join t1 as t11 using (a) left join t1 as t12 using (a) left join t1 as t13 using (a) left join t1 as t14 using (a) left join t1 as t15 using (a) left join t1 as t16 using (a) left join t1 as t17 using (a) left join t1 as t18 using (a) left join t1 as t19 using (a) left join t1 as t20 using (a) left join t1 as t21 using (a) left join t1 as t22 using (a) left join t1 as t23 using (a) left join t1 as t24 using (a) left join t1 as t25 using (a) left join t1 as t26 using (a) left join t1 as t27 using (a) left join t1 as t28 using (a) left join t1 as t29 using (a) left join t1 as t30 using (a) left join t1 as t31 using (a) left join t1 as t32 using (a) left join t1 as t33 using (a) left join t1 as t34 using (a) left join t1 as t35 using (a) left join t1 as t36 using (a) left join t1 as t37 using (a) left join t1 as t38 using (a) left join t1 as t39 using (a) left join t1 as t40 using (a) left join t1 as t41 using (a) left join t1 as t42 using (a) left join t1 as t43 using (a) left join t1 as t44 using (a) left join t1 as t45 using (a) left join t1 as t46 using (a) left join t1 as t47 using (a) left join t1 as t48 using (a) left join t1 as t49 using (a) left join t1 as t50 using (a) left join t1 as t51 using (a) left join t1 as t52 using (a) left join t1 as t53 using (a) left join t1 as t54 using (a) left join t1 as t55 using (a) left join t1 as t56 using (a) left join t1 as t57 using (a) left join t1 as t58 using (a) left join t1 as t59 using (a) left join t1 as t60 using (a) left join t1 as t61 using (a) left join t1 as t62 using (a) left join t1 as t63 using (a) left join t1 as t64 using (a) left join t1 as t65 using (a); ERROR HY000: Too many tables; MySQL can only use XX tables in a join select a from t1 as t1 left join t1 as t2 using (a) left join t1 as t3 using (a) left join t1 as t4 using (a) left join t1 as t5 using (a) left join t1 as t6 using (a) left join t1 as t7 using (a) left join t1 as t8 using (a) left join t1 as t9 using (a) left join t1 as t10 using (a) left join t1 as t11 using (a) left join t1 as t12 using (a) left join t1 as t13 using (a) left join t1 as t14 using (a) left join t1 as t15 using (a) left join t1 as t16 using (a) left join t1 as t17 using (a) left join t1 as t18 using (a) left join t1 as t19 using (a) left join t1 as t20 using (a) left join t1 as t21 using (a) left join t1 as t22 using (a) left join t1 as t23 using (a) left join t1 as t24 using (a) left join t1 as t25 using (a) left join t1 as t26 using (a) left join t1 as t27 using (a) left join t1 as t28 using (a) left join t1 as t29 using (a) left join t1 as t30 using (a) left join t1 as t31 using (a); a 1 2 select a from t1 as t1 left join t1 as t2 using (a) left join t1 as t3 using (a) left join t1 as t4 using (a) left join t1 as t5 using (a) left join t1 as t6 using (a) left join t1 as t7 using (a) left join t1 as t8 using (a) left join t1 as t9 using (a) left join t1 as t10 using (a) left join t1 as t11 using (a) left join t1 as t12 using (a) left join t1 as t13 using (a) left join t1 as t14 using (a) left join t1 as t15 using (a) left join t1 as t16 using (a) left join t1 as t17 using (a) left join t1 as t18 using (a) left join t1 as t19 using (a) left join t1 as t20 using (a) left join t1 as t21 using (a) left join t1 as t22 using (a) left join t1 as t23 using (a) left join t1 as t24 using (a) left join t1 as t25 using (a) left join t1 as t26 using (a) left join t1 as t27 using (a) left join t1 as t28 using (a) left join t1 as t29 using (a) left join t1 as t30 using (a) left join t1 as t31 using (a) left join t1 as t32 using (a) left join t1 as t33 using (a) left join t1 as t34 using (a) left join t1 as t35 using (a) left join t1 as t36 using (a) left join t1 as t37 using (a) left join t1 as t38 using (a) left join t1 as t39 using (a) left join t1 as t40 using (a) left join t1 as t41 using (a) left join t1 as t42 using (a) left join t1 as t43 using (a) left join t1 as t44 using (a) left join t1 as t45 using (a) left join t1 as t46 using (a) left join t1 as t47 using (a) left join t1 as t48 using (a) left join t1 as t49 using (a) left join t1 as t50 using (a) left join t1 as t51 using (a) left join t1 as t52 using (a) left join t1 as t53 using (a) left join t1 as t54 using (a) left join t1 as t55 using (a) left join t1 as t56 using (a) left join t1 as t57 using (a) left join t1 as t58 using (a) left join t1 as t59 using (a) left join t1 as t60 using (a) left join t1 as t61 using (a) left join t1 as t62 using (a) left join t1 as t63 using (a) left join t1 as t64 using (a) left join t1 as t65 using (a); ERROR HY000: Too many tables; MySQL can only use XX tables in a join drop table t1; CREATE TABLE t1 ( a int(11) NOT NULL, b int(11) NOT NULL, PRIMARY KEY (a,b) ) ENGINE=MyISAM; INSERT INTO t1 VALUES (1,1),(1,2),(1,3),(1,4),(1,5),(1,6),(1,7),(2,3); CREATE TABLE t2 ( a int(11) default NULL ) ENGINE=MyISAM; INSERT INTO t2 VALUES (2),(3); SELECT t1.a,t2.a,b FROM t1,t2 WHERE t1.a=t2.a AND (t1.a=1 OR t1.a=2) AND b>=1 AND b<=3; a a b 2 2 3 DROP TABLE t1, t2; CREATE TABLE t1 (d DATE NOT NULL); CREATE TABLE t2 (d DATE NOT NULL); INSERT INTO t1 (d) VALUES ('2001-08-01'),('0000-00-00'); Warnings: Warning 1264 Out of range value for column 'd' at row 2 SELECT * FROM t1 LEFT JOIN t2 USING (d) WHERE t2.d IS NULL; d 2001-08-01 0000-00-00 SELECT * FROM t1 LEFT JOIN t2 USING (d) WHERE d IS NULL; d 0000-00-00 SELECT * from t1 WHERE t1.d IS NULL; d 0000-00-00 SELECT * FROM t1 WHERE 1/0 IS NULL; d 2001-08-01 0000-00-00 Warnings: Warning 1365 Division by 0 Warning 1365 Division by 0 Warning 1365 Division by 0 DROP TABLE t1,t2; CREATE TABLE t1 ( Document_ID varchar(50) NOT NULL default '', Contractor_ID varchar(6) NOT NULL default '', Language_ID char(3) NOT NULL default '', Expiration_Date datetime default NULL, Publishing_Date datetime default NULL, Title text, Column_ID varchar(50) NOT NULL default '', PRIMARY KEY (Language_ID,Document_ID,Contractor_ID) ); INSERT INTO t1 VALUES ('xep80','1','ger','2001-12-31 20:00:00','2001-11-12 10:58:00','Kartenbestellung - jetzt auch online','anle'),('','999998','',NULL,NULL,NULL,''); CREATE TABLE t2 ( Contractor_ID char(6) NOT NULL default '', Language_ID char(3) NOT NULL default '', Document_ID char(50) NOT NULL default '', CanRead char(1) default NULL, Customer_ID int(11) NOT NULL default '0', PRIMARY KEY (Contractor_ID,Language_ID,Document_ID,Customer_ID) ); INSERT INTO t2 VALUES ('5','ger','xep80','1',999999),('1','ger','xep80','1',999999); CREATE TABLE t3 ( Language_ID char(3) NOT NULL default '', Column_ID char(50) NOT NULL default '', Contractor_ID char(6) NOT NULL default '', CanRead char(1) default NULL, Active char(1) default NULL, PRIMARY KEY (Language_ID,Column_ID,Contractor_ID) ); INSERT INTO t3 VALUES ('ger','home','1','1','1'),('ger','Test','1','0','0'),('ger','derclu','1','0','0'),('ger','clubne','1','0','0'),('ger','philos','1','0','0'),('ger','clubko','1','0','0'),('ger','clubim','1','1','1'),('ger','progra','1','0','0'),('ger','progvo','1','0','0'),('ger','progsp','1','0','0'),('ger','progau','1','0','0'),('ger','progku','1','0','0'),('ger','progss','1','0','0'),('ger','nachl','1','0','0'),('ger','mitgli','1','0','0'),('ger','mitsu','1','0','0'),('ger','mitbus','1','0','0'),('ger','ergmar','1','1','1'),('ger','home','4','1','1'),('ger','derclu','4','1','1'),('ger','clubne','4','0','0'),('ger','philos','4','1','1'),('ger','clubko','4','1','1'),('ger','clubim','4','1','1'),('ger','progra','4','1','1'),('ger','progvo','4','1','1'),('ger','progsp','4','1','1'),('ger','progau','4','0','0'),('ger','progku','4','1','1'),('ger','progss','4','1','1'),('ger','nachl','4','1','1'),('ger','mitgli','4','0','0'),('ger','mitsu','4','0','0'),('ger','mitbus','4','0','0'),('ger','ergmar','4','1','1'),('ger','progra2','1','0','0'),('ger','archiv','4','1','1'),('ger','anmeld','4','1','1'),('ger','thema','4','1','1'),('ger','edito','4','1','1'),('ger','madis','4','1','1'),('ger','enma','4','1','1'),('ger','madis','1','1','1'),('ger','enma','1','1','1'),('ger','vorsch','4','0','0'),('ger','veranst','4','0','0'),('ger','anle','4','1','1'),('ger','redak','4','1','1'),('ger','nele','4','1','1'),('ger','aukt','4','1','1'),('ger','callcenter','4','1','1'),('ger','anle','1','0','0'); delete from t1 where Contractor_ID='999998'; insert into t1 (Contractor_ID) Values ('999998'); SELECT DISTINCT COUNT(t1.Title) FROM t1, t2, t3 WHERE t1.Document_ID='xep80' AND t1.Contractor_ID='1' AND t1.Language_ID='ger' AND '2001-12-21 23:14:24' >= Publishing_Date AND '2001-12-21 23:14:24' <= Expiration_Date AND t1.Document_ID = t2.Document_ID AND t1.Language_ID = t2.Language_ID AND t1.Contractor_ID = t2.Contractor_ID AND ( t2.Customer_ID = '4' OR t2.Customer_ID = '999999' OR t2.Customer_ID = '1' )AND t2.CanRead = '1' AND t1.Column_ID=t3.Column_ID AND t1.Language_ID=t3.Language_ID AND ( t3.Contractor_ID = '4' OR t3.Contractor_ID = '999999' OR t3.Contractor_ID = '1') AND t3.CanRead='1' AND t3.Active='1'; COUNT(t1.Title) 1 SELECT DISTINCT COUNT(t1.Title) FROM t1, t2, t3 WHERE t1.Document_ID='xep80' AND t1.Contractor_ID='1' AND t1.Language_ID='ger' AND '2001-12-21 23:14:24' >= Publishing_Date AND '2001-12-21 23:14:24' <= Expiration_Date AND t1.Document_ID = t2.Document_ID AND t1.Language_ID = t2.Language_ID AND t1.Contractor_ID = t2.Contractor_ID AND ( t2.Customer_ID = '4' OR t2.Customer_ID = '999999' OR t2.Customer_ID = '1' )AND t2.CanRead = '1' AND t1.Column_ID=t3.Column_ID AND t1.Language_ID=t3.Language_ID AND ( t3.Contractor_ID = '4' OR t3.Contractor_ID = '999999' OR t3.Contractor_ID = '1') AND t3.CanRead='1' AND t3.Active='1'; COUNT(t1.Title) 1 drop table t1,t2,t3; CREATE TABLE t1 ( t1_id int(11) default NULL, t2_id int(11) default NULL, type enum('Cost','Percent') default NULL, cost_unit enum('Cost','Unit') default NULL, min_value double default NULL, max_value double default NULL, t3_id int(11) default NULL, item_id int(11) default NULL ) ENGINE=MyISAM; INSERT INTO t1 VALUES (12,5,'Percent','Cost',-1,0,-1,-1),(14,4,'Percent','Cost',-1,0,-1,-1),(18,5,'Percent','Cost',-1,0,-1,-1),(19,4,'Percent','Cost',-1,0,-1,-1),(20,5,'Percent','Cost',100,-1,22,291),(21,5,'Percent','Cost',100,-1,18,291),(22,1,'Percent','Cost',100,-1,6,291),(23,1,'Percent','Cost',100,-1,21,291),(24,1,'Percent','Cost',100,-1,9,291),(25,1,'Percent','Cost',100,-1,4,291),(26,1,'Percent','Cost',100,-1,20,291),(27,4,'Percent','Cost',100,-1,7,202),(28,1,'Percent','Cost',50,-1,-1,137),(29,2,'Percent','Cost',100,-1,4,354),(30,2,'Percent','Cost',100,-1,9,137),(93,2,'Cost','Cost',-1,10000000,-1,-1); CREATE TABLE t2 ( id int(10) unsigned NOT NULL auto_increment, name varchar(255) default NULL, PRIMARY KEY (id) ) ENGINE=MyISAM; INSERT INTO t2 VALUES (1,'s1'),(2,'s2'),(3,'s3'),(4,'s4'),(5,'s5'); select t1.*, t2.* from t1, t2 where t2.id=t1.t2_id limit 2; t1_id t2_id type cost_unit min_value max_value t3_id item_id id name 12 5 Percent Cost -1 0 -1 -1 5 s5 14 4 Percent Cost -1 0 -1 -1 4 s4 drop table t1,t2; CREATE TABLE t1 ( siteid varchar(25) NOT NULL default '', emp_id varchar(30) NOT NULL default '', rate_code varchar(10) default NULL, UNIQUE KEY site_emp (siteid,emp_id), KEY siteid (siteid) ) ENGINE=MyISAM; INSERT INTO t1 VALUES ('rivercats','psmith','cust'), ('rivercats','KWalker','cust'); CREATE TABLE t2 ( siteid varchar(25) NOT NULL default '', rate_code varchar(10) NOT NULL default '', base_rate float NOT NULL default '0', PRIMARY KEY (siteid,rate_code), FULLTEXT KEY rate_code (rate_code) ) ENGINE=MyISAM; INSERT INTO t2 VALUES ('rivercats','cust',20); SELECT emp.rate_code, lr.base_rate FROM t1 AS emp LEFT JOIN t2 AS lr USING (siteid, rate_code) WHERE emp.emp_id = 'psmith' AND lr.siteid = 'rivercats'; rate_code base_rate cust 20 SELECT emp.rate_code, lr.base_rate FROM t1 AS emp LEFT JOIN t2 AS lr USING (siteid, rate_code) WHERE lr.siteid = 'rivercats' AND emp.emp_id = 'psmith'; rate_code base_rate cust 20 SELECT rate_code, lr.base_rate FROM t1 AS emp LEFT JOIN t2 AS lr USING (siteid, rate_code) WHERE emp.emp_id = 'psmith' AND siteid = 'rivercats'; rate_code base_rate cust 20 SELECT rate_code, lr.base_rate FROM t1 AS emp LEFT JOIN t2 AS lr USING (siteid, rate_code) WHERE siteid = 'rivercats' AND emp.emp_id = 'psmith'; rate_code base_rate cust 20 drop table t1,t2; CREATE TABLE t1 (ID INTEGER NOT NULL PRIMARY KEY, Value1 VARCHAR(255)); CREATE TABLE t2 (ID INTEGER NOT NULL PRIMARY KEY, Value2 VARCHAR(255)); INSERT INTO t1 VALUES (1, 'A'); INSERT INTO t2 VALUES (1, 'B'); SELECT * FROM t1 NATURAL JOIN t2 WHERE 1 AND (Value1 = 'A' AND Value2 <> 'B'); ID Value1 Value2 SELECT * FROM t1 NATURAL JOIN t2 WHERE 1 AND Value1 = 'A' AND Value2 <> 'B'; ID Value1 Value2 SELECT * FROM t1 NATURAL JOIN t2 WHERE (Value1 = 'A' AND Value2 <> 'B') AND 1; ID Value1 Value2 drop table t1,t2; CREATE TABLE t1 (a int); CREATE TABLE t2 (b int); CREATE TABLE t3 (c int); SELECT * FROM t1 NATURAL JOIN t2 NATURAL JOIN t3; a b c DROP TABLE t1, t2, t3; create table t1 (i int); create table t2 (i int); create table t3 (i int); insert into t1 values(1),(2); insert into t2 values(2),(3); insert into t3 values (2),(4); select * from t1 natural left join t2; i 1 2 select * from t1 left join t2 on (t1.i=t2.i); i i 1 NULL 2 2 select * from t1 natural left join t2 natural left join t3; i 1 2 select * from t1 left join t2 on (t1.i=t2.i) left join t3 on (t2.i=t3.i); i i i 1 NULL NULL 2 2 2 select * from t3 natural right join t2; i 2 3 select * from t3 right join t2 on (t3.i=t2.i); i i 2 2 NULL 3 select * from t3 natural right join t2 natural right join t1; i 1 2 select * from t3 right join t2 on (t3.i=t2.i) right join t1 on (t2.i=t1.i); i i i 2 2 2 NULL NULL 1 select * from t1,t2 natural left join t3 order by t1.i,t2.i,t3.i; i i 1 2 1 3 2 2 2 3 select * from t1,t2 left join t3 on (t2.i=t3.i) order by t1.i,t2.i,t3.i; i i i 1 2 2 1 3 NULL 2 2 2 2 3 NULL select t1.i,t2.i,t3.i from t2 natural left join t3,t1 order by t1.i,t2.i,t3.i; i i i 1 2 2 1 3 NULL 2 2 2 2 3 NULL select t1.i,t2.i,t3.i from t2 left join t3 on (t2.i=t3.i),t1 order by t1.i,t2.i,t3.i; i i i 1 2 2 1 3 NULL 2 2 2 2 3 NULL select * from t1,t2 natural right join t3 order by t1.i,t2.i,t3.i; i i 1 4 1 2 2 4 2 2 select * from t1,t2 right join t3 on (t2.i=t3.i) order by t1.i,t2.i,t3.i; i i i 1 NULL 4 1 2 2 2 NULL 4 2 2 2 select t1.i,t2.i,t3.i from t2 natural right join t3,t1 order by t1.i,t2.i,t3.i; i i i 1 NULL 4 1 2 2 2 NULL 4 2 2 2 select t1.i,t2.i,t3.i from t2 right join t3 on (t2.i=t3.i),t1 order by t1.i,t2.i,t3.i; i i i 1 NULL 4 1 2 2 2 NULL 4 2 2 2 drop table t1,t2,t3; CREATE TABLE t1 (a int, b int default 0, c int default 1); INSERT INTO t1 (a) VALUES (1),(2),(3),(4),(5),(6),(7),(8); INSERT INTO t1 (a) SELECT a + 8 FROM t1; INSERT INTO t1 (a) SELECT a + 16 FROM t1; CREATE TABLE t2 (a int, d int, e int default 0); INSERT INTO t2 (a, d) VALUES (1,1),(2,2),(3,3),(4,4); INSERT INTO t2 (a, d) SELECT a+4, a+4 FROM t2; INSERT INTO t2 (a, d) SELECT a+8, a+8 FROM t2; EXPLAIN SELECT STRAIGHT_JOIN t2.e FROM t1,t2 WHERE t2.d=1 AND t1.b=t2.e ORDER BY t1.b, t1.c; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 32 100.00 Using temporary; Using filesort 1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 16 6.25 Using where; Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select straight_join `test`.`t2`.`e` AS `e` from `test`.`t1` join `test`.`t2` where ((`test`.`t2`.`e` = `test`.`t1`.`b`) and (`test`.`t2`.`d` = 1)) order by `test`.`t1`.`b`,`test`.`t1`.`c` SELECT STRAIGHT_JOIN t2.e FROM t1,t2 WHERE t2.d=1 AND t1.b=t2.e ORDER BY t1.b, t1.c; e 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 DROP TABLE t1,t2; create table t1 (c int, b int); create table t2 (a int, b int); create table t3 (b int, c int); create table t4 (y int, c int); create table t5 (y int, z int); create table t6 (a int, c int); insert into t1 values (10,1); insert into t1 values (3 ,1); insert into t1 values (3 ,2); insert into t2 values (2, 1); insert into t3 values (1, 3); insert into t3 values (1,10); insert into t4 values (11,3); insert into t4 values (2, 3); insert into t5 values (11,4); insert into t6 values (2, 3); create algorithm=merge view v1a as select * from t1 natural join t2; create algorithm=merge view v1b(a,b,c) as select * from t1 natural join t2; create algorithm=merge view v1c as select b as a, c as b, a as c from t1 natural join t2; create algorithm=merge view v1d(b, a, c) as select a as c, c as b, b as a from t1 natural join t2; create algorithm=merge view v2a as select t1.c, t1.b, t2.a from t1 join (t2 join t4 on b + 1 = y) on t1.c = t4.c; create algorithm=merge view v2b as select t1.c as b, t1.b as a, t2.a as c from t1 join (t2 join t4 on b + 1 = y) on t1.c = t4.c; create algorithm=merge view v3a as select * from t1 natural join t2 natural join t3; create algorithm=merge view v3b as select * from t1 natural join (t2 natural join t3); create algorithm=merge view v4 as select * from v2a natural join v3a; select * from (t1 natural join t2) natural join (t3 natural join t4); b c a y 1 3 2 11 1 3 2 2 select * from (t1 natural join t2) natural left join (t3 natural join t4); b c a y 1 10 2 NULL 1 3 2 11 1 3 2 2 select * from (t3 natural join t4) natural right join (t1 natural join t2); b c a y 1 10 2 NULL 1 3 2 11 1 3 2 2 select * from (t1 natural left join t2) natural left join (t3 natural left join t4); b c a y 1 10 2 NULL 1 3 2 11 1 3 2 2 2 3 NULL NULL select * from (t4 natural right join t3) natural right join (t2 natural right join t1); b c a y 1 10 2 NULL 1 3 2 11 1 3 2 2 2 3 NULL NULL select * from t1 natural join t2 natural join t3 natural join t4; c b a y 3 1 2 11 3 1 2 2 select * from ((t1 natural join t2) natural join t3) natural join t4; c b a y 3 1 2 11 3 1 2 2 select * from t1 natural join (t2 natural join (t3 natural join t4)); c b a y 3 1 2 11 3 1 2 2 select * from t5 natural right join (t4 natural right join ((t2 natural right join t1) natural right join t3)); y c b a z 11 3 1 2 4 2 3 1 2 NULL NULL 10 1 2 NULL select * from (t1 natural join t2), (t3 natural join t4); b c a c b y 1 10 2 3 1 11 1 3 2 3 1 11 1 10 2 3 1 2 1 3 2 3 1 2 select * from t5 natural join ((t1 natural join t2), (t3 natural join t4)); y z b c a c b 11 4 1 10 2 3 1 11 4 1 3 2 3 1 select * from ((t1 natural join t2), (t3 natural join t4)) natural join t5; y b c a c b z 11 1 10 2 3 1 4 11 1 3 2 3 1 4 select * from t5 natural join ((t1 natural join t2) cross join (t3 natural join t4)); y z b c a c b 11 4 1 10 2 3 1 11 4 1 3 2 3 1 select * from ((t1 natural join t2) cross join (t3 natural join t4)) natural join t5; y b c a c b z 11 1 10 2 3 1 4 11 1 3 2 3 1 4 select * from (t1 join t2 using (b)) join (t3 join t4 using (c)) using (c); c b a b y 3 1 2 1 11 3 1 2 1 2 select * from (t1 join t2 using (b)) natural join (t3 join t4 using (c)); b c a y 1 3 2 11 1 3 2 2 select a,b,c from (t1 natural join t2) natural join (t3 natural join t4) where b + 1 = y or b + 10 = y group by b,c,a having min(b) < max(y) order by a; a b c 2 1 3 select * from (t1 natural join t2) natural left join (t3 natural join t4) where b + 1 = y or b + 10 = y group by b,c,a,y having min(b) < max(y) order by a, y; b c a y 1 3 2 2 1 3 2 11 select * from (t3 natural join t4) natural right join (t1 natural join t2) where b + 1 = y or b + 10 = y group by b,c,a,y having min(b) < max(y) order by a, y; b c a y 1 3 2 2 1 3 2 11 select * from t1 natural join t2 where t1.c > t2.a; b c a 1 10 2 1 3 2 select * from t1 natural join t2 where t1.b > t2.b; b c a select * from t1 natural left join (t4 natural join t5) where t5.z is not NULL; c b y z 3 1 11 4 3 2 11 4 select * from t1 join (t2 join t4 on b + 1 = y) on t1.c = t4.c; c b a b y c 3 1 2 1 2 3 3 2 2 1 2 3 select * from (t2 join t4 on b + 1 = y) join t1 on t1.c = t4.c; a b y c c b 2 1 2 3 3 1 2 1 2 3 3 2 select * from t1 natural join (t2 join t4 on b + 1 = y); c b a y 3 1 2 2 select * from (t1 cross join t2) join (t3 cross join t4) on (a < y and t2.b < t3.c); c b a b b c y c 10 1 2 1 1 3 11 3 10 1 2 1 1 10 11 3 3 1 2 1 1 3 11 3 3 1 2 1 1 10 11 3 3 2 2 1 1 3 11 3 3 2 2 1 1 10 11 3 select * from (t1, t2) join (t3, t4) on (a < y and t2.b < t3.c); c b a b b c y c 10 1 2 1 1 3 11 3 10 1 2 1 1 10 11 3 3 1 2 1 1 3 11 3 3 1 2 1 1 10 11 3 3 2 2 1 1 3 11 3 3 2 2 1 1 10 11 3 select * from (t1 natural join t2) join (t3 natural join t4) on a = y; b c a c b y 1 10 2 3 1 2 1 3 2 3 1 2 select * from ((t3 join (t1 join t2 on c > a) on t3.b < t2.a) join t4 on y > t1.c) join t5 on z = t1.b + 3; b c c b a b y c y z 1 3 10 1 2 1 11 3 11 4 1 10 10 1 2 1 11 3 11 4 1 3 3 1 2 1 11 3 11 4 1 10 3 1 2 1 11 3 11 4 select * from t1 natural join t2 where t1.b > 0; b c a 1 10 2 1 3 2 select * from t1 natural join (t4 natural join t5) where t4.y > 7; c b y z 3 1 11 4 3 2 11 4 select * from (t4 natural join t5) natural join t1 where t4.y > 7; c y z b 3 11 4 1 3 11 4 2 select * from t1 natural left join (t4 natural join t5) where t4.y > 7; c b y z 3 1 11 4 3 2 11 4 select * from (t4 natural join t5) natural right join t1 where t4.y > 7; c b y z 3 1 11 4 3 2 11 4 select * from (t1 natural join t2) join (t3 natural join t4) on t1.b = t3.b; b c a c b y 1 10 2 3 1 11 1 10 2 3 1 2 1 3 2 3 1 11 1 3 2 3 1 2 select t1.*, t2.* from t1 natural join t2; c b a b 10 1 2 1 3 1 2 1 select t1.*, t2.*, t3.*, t4.* from (t1 natural join t2) natural join (t3 natural join t4); c b a b b c y c 3 1 2 1 1 3 11 3 3 1 2 1 1 3 2 3 select * from (select * from t1 natural join t2) as t12 natural join (select * from t3 natural join t4) as t34; b c a y 1 3 2 11 1 3 2 2 select * from (select * from t1 natural join t2) as t12 natural left join (select * from t3 natural join t4) as t34; b c a y 1 10 2 NULL 1 3 2 11 1 3 2 2 select * from (select * from t3 natural join t4) as t34 natural right join (select * from t1 natural join t2) as t12; b c a y 1 10 2 NULL 1 3 2 11 1 3 2 2 select * from v1a; b c a 1 10 2 1 3 2 select * from v1b; a b c 1 10 2 1 3 2 select * from v1c; a b c 1 10 2 1 3 2 select * from v1d; b a c 2 10 1 2 3 1 select * from v2a; c b a 3 1 2 3 2 2 select * from v2b; b a c 3 1 2 3 2 2 select * from v3a; b c a 1 10 2 1 3 2 select * from v3b; c b a 10 1 2 3 1 2 select * from v4; c b a 3 1 2 select * from v1a natural join v2a; b c a 1 3 2 select v2a.* from v1a natural join v2a; c b a 3 1 2 select * from v1b join v2a on v1b.b = v2a.c; a b c c b a 1 3 2 3 1 2 1 3 2 3 2 2 select * from v1c join v2a on v1c.b = v2a.c; a b c c b a 1 3 2 3 1 2 1 3 2 3 2 2 select * from v1d join v2a on v1d.a = v2a.c; b a c c b a 2 3 1 3 1 2 2 3 1 3 2 2 select * from v1a join (t3 natural join t4) on a = y; b c a c b y 1 10 2 3 1 2 1 3 2 3 1 2 select * from t1 natural join (t3 cross join t4); ERROR 23000: Column 'c' in from clause is ambiguous select * from (t3 cross join t4) natural join t1; ERROR 23000: Column 'c' in from clause is ambiguous select * from t1 join (t2, t3) using (b); ERROR 23000: Column 'b' in from clause is ambiguous select * from ((t1 natural join t2), (t3 natural join t4)) natural join t6; ERROR 23000: Column 'c' in from clause is ambiguous select * from ((t1 natural join t2), (t3 natural join t4)) natural join t6; ERROR 23000: Column 'c' in from clause is ambiguous select * from t6 natural join ((t1 natural join t2), (t3 natural join t4)); ERROR 23000: Column 'c' in from clause is ambiguous select * from (t1 join t2 on t1.b=t2.b) natural join (t3 natural join t4); ERROR 23000: Column 'b' in from clause is ambiguous select * from (t3 natural join t4) natural join (t1 join t2 on t1.b=t2.b); ERROR 23000: Column 'b' in from clause is ambiguous select * from (t3 join (t4 natural join t5) on (b < z)) natural join (t1 natural join t2); ERROR 23000: Column 'c' in from clause is ambiguous select * from (t1 natural join t2) natural join (t3 join (t4 natural join t5) on (b < z)); ERROR 23000: Column 'c' in from clause is ambiguous select t1.b from v1a; ERROR 42S22: Unknown column 't1.b' in 'field list' select * from v1a join v1b on t1.b = t2.b; ERROR 42S22: Unknown column 't1.b' in 'on clause' select statistics.TABLE_NAME, statistics.COLUMN_NAME, statistics.TABLE_CATALOG, statistics.TABLE_SCHEMA, statistics.NON_UNIQUE, statistics.INDEX_SCHEMA, statistics.INDEX_NAME, statistics.SEQ_IN_INDEX, statistics.COLLATION, statistics.SUB_PART, statistics.PACKED, statistics.NULLABLE, statistics.INDEX_TYPE, statistics.COMMENT, columns.TABLE_CATALOG, columns.TABLE_SCHEMA, columns.COLUMN_DEFAULT, columns.IS_NULLABLE, columns.DATA_TYPE, columns.CHARACTER_MAXIMUM_LENGTH, columns.CHARACTER_OCTET_LENGTH, columns.NUMERIC_PRECISION, columns.NUMERIC_SCALE, columns.CHARACTER_SET_NAME, columns.COLLATION_NAME, columns.COLUMN_TYPE, columns.COLUMN_KEY, columns.EXTRA, columns.COLUMN_COMMENT from information_schema.statistics join information_schema.columns using(table_name,column_name) where table_name='user'; TABLE_NAME COLUMN_NAME TABLE_CATALOG TABLE_SCHEMA NON_UNIQUE INDEX_SCHEMA INDEX_NAME SEQ_IN_INDEX COLLATION SUB_PART PACKED NULLABLE INDEX_TYPE COMMENT TABLE_CATALOG TABLE_SCHEMA COLUMN_DEFAULT IS_NULLABLE DATA_TYPE CHARACTER_MAXIMUM_LENGTH CHARACTER_OCTET_LENGTH NUMERIC_PRECISION NUMERIC_SCALE CHARACTER_SET_NAME COLLATION_NAME COLUMN_TYPE COLUMN_KEY EXTRA COLUMN_COMMENT user Host def mysql 0 mysql PRIMARY 1 A NULL NULL BTREE def mysql NO char 60 180 NULL NULL utf8 utf8_bin char(60) PRI user User def mysql 0 mysql PRIMARY 2 A NULL NULL BTREE def mysql NO char 32 96 NULL NULL utf8 utf8_bin char(32) PRI drop table t1; drop table t2; drop table t3; drop table t4; drop table t5; drop table t6; drop view v1a; drop view v1b; drop view v1c; drop view v1d; drop view v2a; drop view v2b; drop view v3a; drop view v3b; drop view v4; create table t1 (a1 int, a2 int); create table t2 (a1 int, b int); create table t3 (c1 int, c2 int); create table t4 (c2 int); insert into t1 values (1,1); insert into t2 values (1,1); insert into t3 values (1,1); insert into t4 values (1); select * from t1 join t2 using (a1) join t3 on b=c1 join t4 using (c2); c2 a1 a2 b c1 1 1 1 1 1 select * from t3 join (t1 join t2 using (a1)) on b=c1 join t4 using (c2); c2 c1 a1 a2 b 1 1 1 1 1 select a2 from t1 join t2 using (a1) join t3 on b=c1 join t4 using (c2); a2 1 select a2 from t3 join (t1 join t2 using (a1)) on b=c1 join t4 using (c2); a2 1 select a2 from ((t1 join t2 using (a1)) join t3 on b=c1) join t4 using (c2); a2 1 select a2 from ((t1 natural join t2) join t3 on b=c1) natural join t4; a2 1 drop table t1,t2,t3,t4; create table t1 (c int, b int); create table t2 (a int, b int); create table t3 (b int, c int); create table t4 (y int, c int); create table t5 (y int, z int); insert into t1 values (3,2); insert into t2 values (1,2); insert into t3 values (2,3); insert into t4 values (1,3); insert into t5 values (1,4); prepare stmt1 from "select * from ((t3 natural join (t1 natural join t2)) natural join t4) natural join t5"; execute stmt1; y c b a z 1 3 2 1 4 select * from ((t3 natural join (t1 natural join t2)) natural join t4) natural join t5; y c b a z 1 3 2 1 4 drop table t1, t2, t3, t4, t5; CREATE TABLE t1 (ID INTEGER, Name VARCHAR(50)); CREATE TABLE t2 (Test_ID INTEGER); CREATE VIEW v1 (Test_ID, Description) AS SELECT ID, Name FROM t1; CREATE TABLE tv1 SELECT Description AS Name FROM v1 JOIN t2 USING (Test_ID); DESCRIBE tv1; Field Type Null Key Default Extra Name varchar(50) YES NULL CREATE TABLE tv2 SELECT Description AS Name FROM v1 JOIN t2 ON v1.Test_ID = t2.Test_ID; DESCRIBE tv2; Field Type Null Key Default Extra Name varchar(50) YES NULL DROP VIEW v1; DROP TABLE t1,t2,tv1,tv2; create table t1 (a int, b int); insert into t1 values (NULL, 1), (NULL, 2), (NULL, 3), (NULL, 4); create table t2 (a int not null, primary key(a)); insert into t2 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); create table t3 (a int not null, primary key(a)); insert into t3 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); flush status; select * from t1, t2, t3 where t3.a=t1.a and t2.a=t1.b; a b a a explain select * from t1, t2, t3 where t3.a=t1.a and t2.a=t1.b; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 4 100.00 Using where 1 SIMPLE t2 NULL eq_ref PRIMARY PRIMARY 4 test.t1.b 1 100.00 Using index 1 SIMPLE t3 NULL eq_ref PRIMARY PRIMARY 4 test.t1.a 1 100.00 Using index Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`a` AS `a`,`test`.`t3`.`a` AS `a` from `test`.`t1` join `test`.`t2` join `test`.`t3` where ((`test`.`t2`.`a` = `test`.`t1`.`b`) and (`test`.`t3`.`a` = `test`.`t1`.`a`)) We expect rnd_next=5, and read_key must be 0 because of short-cutting: show status like 'Handler_read%'; Variable_name Value Handler_read_first 0 Handler_read_key 0 Handler_read_last 0 Handler_read_next 0 Handler_read_prev 0 Handler_read_rnd 0 Handler_read_rnd_next 5 drop table t1, t2, t3; create table t1 (a int); insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); create table t2 (a int, b int, filler char(100), key(a), key(b)); create table t3 (a int, b int, filler char(100), key(a), key(b)); insert into t2 select @a:= A.a + 10*(B.a + 10*C.a), @a, 'filler' from t1 A, t1 B, t1 C; insert into t3 select * from t2 where a < 800; explain select * from t2,t3 where t2.a < 200 and t2.b=t3.b; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 NULL ALL a,b NULL NULL NULL 1000 19.80 Using where 1 SIMPLE t3 NULL ref b b 5 test.t2.b 1 100.00 NULL Warnings: Note 1003 /* select#1 */ select `test`.`t2`.`a` AS `a`,`test`.`t2`.`b` AS `b`,`test`.`t2`.`filler` AS `filler`,`test`.`t3`.`a` AS `a`,`test`.`t3`.`b` AS `b`,`test`.`t3`.`filler` AS `filler` from `test`.`t2` join `test`.`t3` where ((`test`.`t3`.`b` = `test`.`t2`.`b`) and (`test`.`t2`.`a` < 200)) drop table t1, t2, t3; create table t1 (a int); insert into t1 values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9); create table t2 (a int, b int, primary key(a)); insert into t2 select @v:=A.a+10*B.a, @v from t1 A, t1 B; explain select * from t1; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 10 100.00 NULL Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a` from `test`.`t1` show status like '%cost%'; Variable_name Value Last_query_cost 4.016090 select 'The cost of accessing t1 (dont care if it changes' '^'; The cost of accessing t1 (dont care if it changes The cost of accessing t1 (dont care if it changes^ select 'vv: Following query must use ALL(t1), eq_ref(A), eq_ref(B): vv' Z; Z vv: Following query must use ALL(t1), eq_ref(A), eq_ref(B): vv explain select * from t1, t2 a, t2 b where a.a = t1.a and b.a=a.b; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 10 100.00 Using where 1 SIMPLE a NULL eq_ref PRIMARY PRIMARY 4 test.t1.a 1 100.00 Using where 1 SIMPLE b NULL eq_ref PRIMARY PRIMARY 4 test.a.b 1 100.00 NULL Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`a`.`a` AS `a`,`test`.`a`.`b` AS `b`,`test`.`b`.`a` AS `a`,`test`.`b`.`b` AS `b` from `test`.`t1` join `test`.`t2` `a` join `test`.`t2` `b` where ((`test`.`b`.`a` = `test`.`a`.`b`) and (`test`.`a`.`a` = `test`.`t1`.`a`)) show status like '%cost%'; Variable_name Value Last_query_cost 28.016090 select '^^: The above should be ~= 20 + cost(select * from t1). Value less than 20 is an error' Z; Z ^^: The above should be ~= 20 + cost(select * from t1). Value less than 20 is an error drop table t1, t2; CREATE TABLE t1 (a INT PRIMARY KEY, b INT); CREATE TABLE t2 (c INT PRIMARY KEY, d INT); INSERT INTO t1 VALUES(1,NULL),(2,NULL),(3,NULL),(4,NULL); INSERT INTO t1 SELECT a + 4, b FROM t1; INSERT INTO t1 SELECT a + 8, b FROM t1; INSERT INTO t1 SELECT a + 16, b FROM t1; INSERT INTO t1 SELECT a + 32, b FROM t1; INSERT INTO t1 SELECT a + 64, b FROM t1; INSERT INTO t2 SELECT a, b FROM t1; EXPLAIN SELECT * FROM t1 JOIN t2 ON b=c ORDER BY a LIMIT 2; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL index NULL PRIMARY 4 NULL 2 100.00 Using where 1 SIMPLE t2 NULL eq_ref PRIMARY PRIMARY 4 test.t1.b 1 100.00 NULL Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t1` join `test`.`t2` where (`test`.`t2`.`c` = `test`.`t1`.`b`) order by `test`.`t1`.`a` limit 2 EXPLAIN SELECT * FROM t1 JOIN t2 ON a=c ORDER BY a LIMIT 2; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL index PRIMARY PRIMARY 4 NULL 2 100.00 NULL 1 SIMPLE t2 NULL eq_ref PRIMARY PRIMARY 4 test.t1.a 1 100.00 NULL Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t1` join `test`.`t2` where (`test`.`t2`.`c` = `test`.`t1`.`a`) order by `test`.`t1`.`a` limit 2 SELECT * FROM t1 JOIN t2 ON b=c ORDER BY a LIMIT 2; a b c d SELECT * FROM t1 JOIN t2 ON a=c ORDER BY a LIMIT 2; a b c d 1 NULL 1 NULL 2 NULL 2 NULL EXPLAIN SELECT * FROM t1 JOIN t2 ON b=c ORDER BY a; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 128 100.00 Using where; Using filesort 1 SIMPLE t2 NULL eq_ref PRIMARY PRIMARY 4 test.t1.b 1 100.00 NULL Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t1` join `test`.`t2` where (`test`.`t2`.`c` = `test`.`t1`.`b`) order by `test`.`t1`.`a` EXPLAIN SELECT * FROM t1 JOIN t2 ON a=c ORDER BY a; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ALL PRIMARY NULL NULL NULL 128 100.00 Using filesort 1 SIMPLE t2 NULL eq_ref PRIMARY PRIMARY 4 test.t1.a 1 100.00 NULL Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t1`.`b` AS `b`,`test`.`t2`.`c` AS `c`,`test`.`t2`.`d` AS `d` from `test`.`t1` join `test`.`t2` where (`test`.`t2`.`c` = `test`.`t1`.`a`) order by `test`.`t1`.`a` SELECT * FROM t1 JOIN t2 ON b=c ORDER BY a; a b c d SELECT * FROM t1 JOIN t2 ON a=c ORDER BY a; a b c d 1 NULL 1 NULL 2 NULL 2 NULL 3 NULL 3 NULL 4 NULL 4 NULL 5 NULL 5 NULL 6 NULL 6 NULL 7 NULL 7 NULL 8 NULL 8 NULL 9 NULL 9 NULL 10 NULL 10 NULL 11 NULL 11 NULL 12 NULL 12 NULL 13 NULL 13 NULL 14 NULL 14 NULL 15 NULL 15 NULL 16 NULL 16 NULL 17 NULL 17 NULL 18 NULL 18 NULL 19 NULL 19 NULL 20 NULL 20 NULL 21 NULL 21 NULL 22 NULL 22 NULL 23 NULL 23 NULL 24 NULL 24 NULL 25 NULL 25 NULL 26 NULL 26 NULL 27 NULL 27 NULL 28 NULL 28 NULL 29 NULL 29 NULL 30 NULL 30 NULL 31 NULL 31 NULL 32 NULL 32 NULL 33 NULL 33 NULL 34 NULL 34 NULL 35 NULL 35 NULL 36 NULL 36 NULL 37 NULL 37 NULL 38 NULL 38 NULL 39 NULL 39 NULL 40 NULL 40 NULL 41 NULL 41 NULL 42 NULL 42 NULL 43 NULL 43 NULL 44 NULL 44 NULL 45 NULL 45 NULL 46 NULL 46 NULL 47 NULL 47 NULL 48 NULL 48 NULL 49 NULL 49 NULL 50 NULL 50 NULL 51 NULL 51 NULL 52 NULL 52 NULL 53 NULL 53 NULL 54 NULL 54 NULL 55 NULL 55 NULL 56 NULL 56 NULL 57 NULL 57 NULL 58 NULL 58 NULL 59 NULL 59 NULL 60 NULL 60 NULL 61 NULL 61 NULL 62 NULL 62 NULL 63 NULL 63 NULL 64 NULL 64 NULL 65 NULL 65 NULL 66 NULL 66 NULL 67 NULL 67 NULL 68 NULL 68 NULL 69 NULL 69 NULL 70 NULL 70 NULL 71 NULL 71 NULL 72 NULL 72 NULL 73 NULL 73 NULL 74 NULL 74 NULL 75 NULL 75 NULL 76 NULL 76 NULL 77 NULL 77 NULL 78 NULL 78 NULL 79 NULL 79 NULL 80 NULL 80 NULL 81 NULL 81 NULL 82 NULL 82 NULL 83 NULL 83 NULL 84 NULL 84 NULL 85 NULL 85 NULL 86 NULL 86 NULL 87 NULL 87 NULL 88 NULL 88 NULL 89 NULL 89 NULL 90 NULL 90 NULL 91 NULL 91 NULL 92 NULL 92 NULL 93 NULL 93 NULL 94 NULL 94 NULL 95 NULL 95 NULL 96 NULL 96 NULL 97 NULL 97 NULL 98 NULL 98 NULL 99 NULL 99 NULL 100 NULL 100 NULL 101 NULL 101 NULL 102 NULL 102 NULL 103 NULL 103 NULL 104 NULL 104 NULL 105 NULL 105 NULL 106 NULL 106 NULL 107 NULL 107 NULL 108 NULL 108 NULL 109 NULL 109 NULL 110 NULL 110 NULL 111 NULL 111 NULL 112 NULL 112 NULL 113 NULL 113 NULL 114 NULL 114 NULL 115 NULL 115 NULL 116 NULL 116 NULL 117 NULL 117 NULL 118 NULL 118 NULL 119 NULL 119 NULL 120 NULL 120 NULL 121 NULL 121 NULL 122 NULL 122 NULL 123 NULL 123 NULL 124 NULL 124 NULL 125 NULL 125 NULL 126 NULL 126 NULL 127 NULL 127 NULL 128 NULL 128 NULL DROP TABLE IF EXISTS t1,t2; # # Bug #42116: Mysql crash on specific query # CREATE TABLE t1 (a INT); CREATE TABLE t2 (a INT); CREATE TABLE t3 (a INT, INDEX (a)); CREATE TABLE t4 (a INT); CREATE TABLE t5 (a INT); CREATE TABLE t6 (a INT); INSERT INTO t1 VALUES (1), (1), (1); INSERT INTO t2 VALUES (2), (2), (2), (2), (2), (2), (2), (2), (2), (2); INSERT INTO t3 VALUES (3), (3), (3), (3), (3), (3), (3), (3), (3), (3); EXPLAIN SELECT * FROM t1 JOIN t2 ON t1.a = t2.a LEFT JOIN ( ( t3 LEFT JOIN t4 ON t3.a = t4.a ) LEFT JOIN ( t5 LEFT JOIN t6 ON t5.a = t6.a ) ON t4.a = t5.a ) ON t1.a = t3.a; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 3 100.00 NULL 1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 10 10.00 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t3 NULL ref a a 5 test.t1.a 2 100.00 Using where; Using index 1 SIMPLE t4 NULL ALL NULL NULL NULL NULL 0 0.00 Using where 1 SIMPLE t5 NULL ALL NULL NULL NULL NULL 0 0.00 Using where 1 SIMPLE t6 NULL ALL NULL NULL NULL NULL 0 0.00 Using where Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`a` AS `a`,`test`.`t2`.`a` AS `a`,`test`.`t3`.`a` AS `a`,`test`.`t4`.`a` AS `a`,`test`.`t5`.`a` AS `a`,`test`.`t6`.`a` AS `a` from `test`.`t1` join `test`.`t2` left join (`test`.`t3` left join `test`.`t4` on((`test`.`t4`.`a` = `test`.`t1`.`a`)) left join (`test`.`t5` left join `test`.`t6` on((`test`.`t6`.`a` = `test`.`t4`.`a`))) on((`test`.`t5`.`a` = `test`.`t4`.`a`))) on(((`test`.`t2`.`a` = `test`.`t1`.`a`) and (`test`.`t3`.`a` = `test`.`t1`.`a`))) where (`test`.`t2`.`a` = `test`.`t1`.`a`) SELECT * FROM t1 JOIN t2 ON t1.a = t2.a LEFT JOIN ( ( t3 LEFT JOIN t4 ON t3.a = t4.a ) LEFT JOIN ( t5 LEFT JOIN t6 ON t5.a = t6.a ) ON t4.a = t5.a ) ON t1.a = t3.a; a a a a a a DROP TABLE t1,t2,t3,t4,t5,t6; # # Bug#48483: crash in get_best_combination() # CREATE TABLE t1(f1 INT); INSERT INTO t1 VALUES (1),(2); CREATE VIEW v1 AS SELECT 1 FROM t1 LEFT JOIN t1 AS t2 on 1=1; EXPLAIN EXTENDED SELECT 1 FROM v1 right join v1 AS v2 ON RAND(); id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 100.00 NULL 1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 100.00 Using join buffer (Block Nested Loop) 1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (Block Nested Loop) Warnings: Warning 1681 'EXTENDED' is deprecated and will be removed in a future release. Note 1003 /* select#1 */ select 1 AS `1` from `test`.`t1` left join `test`.`t1` `t2` on((1 = 1)) left join (`test`.`t1` left join `test`.`t1` `t2` on((1 = 1))) on(rand()) where 1 DROP VIEW v1; DROP TABLE t1; # # Bug#52177 crash with explain, row comparison, join, text field # CREATE TABLE t1 (a TINYINT, b TEXT, KEY (a)); INSERT INTO t1 VALUES (0,''),(0,''); FLUSH TABLES; EXPLAIN SELECT 1 FROM t1 LEFT JOIN t1 a ON 1 WHERE ROW(t1.a, 1111.11) = ROW(1111.11, 1111.11) AND ROW(t1.b, 1111.11) <=> ROW('',''); id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL NULL Impossible WHERE Warnings: Note 1003 /* select#1 */ select 1 AS `1` from `test`.`t1` left join `test`.`t1` `a` on(1) where 0 DROP TABLE t1; # # Bug #50335: Assertion `!(order->used & map)' in eq_ref_table # CREATE TABLE t1 (a INT NOT NULL, b INT NOT NULL, PRIMARY KEY (a,b)); INSERT INTO t1 VALUES (0,0), (1,1); SELECT * FROM t1 STRAIGHT_JOIN t1 t2 ON t1.a=t2.a AND t1.a=t2.b ORDER BY t2.a, t1.a; a b a b 0 0 0 0 1 1 1 1 DROP TABLE t1; End of 5.0 tests. CREATE TABLE t1 (f1 int); CREATE TABLE t2 (f1 int); INSERT INTO t2 VALUES (1); CREATE VIEW v1 AS SELECT * FROM t2; PREPARE stmt FROM 'UPDATE t2 AS A NATURAL JOIN v1 B SET B.f1 = 1'; EXECUTE stmt; EXECUTE stmt; DEALLOCATE PREPARE stmt; DROP VIEW v1; DROP TABLE t1, t2; CREATE TABLE t1(a CHAR(9),b INT,KEY(b),KEY(a)) ENGINE=MYISAM; CREATE TABLE t2(a CHAR(9),b INT,KEY(b),KEY(a)) ENGINE=MYISAM; INSERT INTO t1 VALUES ('1',null),(null,null); INSERT INTO t2 VALUES ('1',null),(null,null); CREATE TABLE mm1(a CHAR(9),b INT,KEY(b),KEY(a)) ENGINE=MERGE UNION=(t1,t2); SELECT t1.a FROM mm1,t1; a NULL 1 NULL 1 NULL 1 NULL 1 DROP TABLE t1, t2, mm1; # # Bug #54468: crash after item's print() function when ordering/grouping # by subquery # CREATE TABLE t1(a INT, b INT); INSERT INTO t1 VALUES (), (); SELECT 1 FROM t1 GROUP BY GREATEST(t1.a, (SELECT 1 FROM (SELECT t1.b FROM t1,t1 t2 ORDER BY t1.a, t1.a LIMIT 1) AS d) ); 1 1 DROP TABLE t1; # # Bug #53544: Server hangs during JOIN query in stored procedure called # twice in a row # CREATE TABLE t1(c INT); INSERT INTO t1 VALUES (1), (2); PREPARE stmt FROM "SELECT t2.c AS f1 FROM t1 LEFT JOIN t1 t2 ON t1.c=t2.c RIGHT JOIN t1 t3 ON t1.c=t3.c GROUP BY f1;"; EXECUTE stmt; f1 1 2 EXECUTE stmt; f1 1 2 DEALLOCATE PREPARE stmt; DROP TABLE t1; End of 5.1 tests # # Bug #59696 Optimizer fails to move WHERE condition on JOIN column # when joining with a view # CREATE TABLE t1 ( c1 INTEGER NOT NULL ); INSERT INTO t1 VALUES (1),(2),(3); CREATE TABLE t2 ( pk INTEGER NOT NULL, c1 INTEGER NOT NULL, PRIMARY KEY (pk) ); INSERT INTO t2 VALUES (1,4),(3,5),(2,6); EXPLAIN SELECT t2.pk, t2.c1 FROM t2, t1 WHERE t2.pk = t1.c1 AND t2.pk >= 2; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 3 100.00 Using where 1 SIMPLE t2 NULL eq_ref PRIMARY PRIMARY 4 test.t1.c1 1 100.00 NULL Warnings: Note 1003 /* select#1 */ select `test`.`t2`.`pk` AS `pk`,`test`.`t2`.`c1` AS `c1` from `test`.`t2` join `test`.`t1` where ((`test`.`t2`.`pk` = `test`.`t1`.`c1`) and (`test`.`t1`.`c1` >= 2)) SELECT t2.pk, t2.c1 FROM t2, t1 WHERE t2.pk = t1.c1 AND t2.pk >= 2; pk c1 2 6 3 5 CREATE VIEW v_t2 AS SELECT * FROM t2; EXPLAIN SELECT v_t2.pk, v_t2.c1 FROM v_t2, t1 WHERE v_t2.pk = t1.c1 AND v_t2.pk >= 2; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 3 100.00 NULL 1 SIMPLE t2 NULL eq_ref PRIMARY PRIMARY 4 test.t1.c1 1 100.00 Using index condition Warnings: Note 1003 /* select#1 */ select `test`.`t2`.`pk` AS `pk`,`test`.`t2`.`c1` AS `c1` from `test`.`t2` join `test`.`t1` where ((`test`.`t2`.`pk` = `test`.`t1`.`c1`) and (`test`.`t2`.`pk` >= 2)) SELECT v_t2.pk, v_t2.c1 FROM v_t2, t1 WHERE v_t2.pk = t1.c1 AND v_t2.pk >= 2; pk c1 2 6 3 5 DROP VIEW v_t2; DROP TABLE t1, t2; # # Bug 13102033 - CRASH IN COPY_FUNCS IN SQL_SELECT.CC ON JOIN + # GROUP BY + ORDER BY # CREATE TABLE t1 ( pk INTEGER NOT NULL, i1 INTEGER NOT NULL, i2 INTEGER NOT NULL, PRIMARY KEY (pk) ); INSERT INTO t1 VALUES (7,8,1), (8,2,2); CREATE VIEW v1 AS SELECT * FROM t1; EXPLAIN SELECT t1.pk FROM v1, t1 WHERE v1.i2 = 211 AND v1.i2 > 7 OR t1.i1 < 3 GROUP BY t1.pk ORDER BY v1.i2; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 100.00 Using temporary; Using filesort 1 SIMPLE t1 NULL ALL PRIMARY NULL NULL NULL 2 100.00 Using where; Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`pk` AS `pk` from `test`.`t1` join `test`.`t1` where (((`test`.`t1`.`i2` = 211) and (`test`.`t1`.`i2` > 7)) or (`test`.`t1`.`i1` < 3)) group by `test`.`t1`.`pk` order by `test`.`t1`.`i2` SELECT t1.pk FROM v1, t1 WHERE v1.i2 = 211 AND v1.i2 > 7 OR t1.i1 < 3 GROUP BY t1.pk ORDER BY v1.i2; pk 8 EXPLAIN SELECT t1.pk FROM v1, t1 WHERE (v1.i2 = 211 AND v1.i2 > 7) OR (t1.i1 < 3 AND v1.i2 < 10); id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 62.50 Using where 1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 2 100.00 Using where; Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select `test`.`t1`.`pk` AS `pk` from `test`.`t1` join `test`.`t1` where (((`test`.`t1`.`i2` = 211) and (`test`.`t1`.`i2` > 7)) or ((`test`.`t1`.`i1` < 3) and (`test`.`t1`.`i2` < 10))) SELECT t1.pk FROM v1, t1 WHERE (v1.i2 = 211 AND v1.i2 > 7) OR (t1.i1 < 3 AND v1.i2 < 10); pk 8 8 DROP VIEW v1; DROP TABLE t1; # # BUG#11752239 - 43368: STRAIGHT_JOIN DOESN'T WORK FOR NESTED JOINS # create table t1(c1 int primary key, c2 char(10)) engine=myisam; create table t2(c1 int primary key, c2 char(10), ref_t1 int) engine=myisam; create table t3(c1 int primary key, c2 char(10), ref_t1 int) engine=myisam; create table t4(c1 int primary key, c2 char(10), ref_t1 int) engine=myisam; insert into t1 values(1,'a'); insert into t2 values(1,'a', 1); insert into t3 values(1,'a', 1); insert into t3 values(2,'b',2); insert into t4 values(1,'a', 1); insert into t4 values(2,'a', 2); insert into t4 values(3,'a', 3); insert into t4 values(4,'a', 4); insert into t1 values(2,'b'); insert into t1 values(3,'c'); EXPLAIN SELECT * FROM t4 JOIN (t1 join t3 on t3.ref_t1 = t1.c1 join t2 on t2.ref_t1 = t1.c1) on t4.ref_t1 = t1.c1; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t2 NULL system NULL NULL NULL NULL 1 100.00 NULL 1 SIMPLE t1 NULL const PRIMARY PRIMARY 4 const 1 100.00 NULL 1 SIMPLE t3 NULL ALL NULL NULL NULL NULL 2 50.00 Using where 1 SIMPLE t4 NULL ALL NULL NULL NULL NULL 4 25.00 Using where; Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select `test`.`t4`.`c1` AS `c1`,`test`.`t4`.`c2` AS `c2`,`test`.`t4`.`ref_t1` AS `ref_t1`,'1' AS `c1`,'a' AS `c2`,`test`.`t3`.`c1` AS `c1`,`test`.`t3`.`c2` AS `c2`,`test`.`t3`.`ref_t1` AS `ref_t1`,'1' AS `c1`,'a' AS `c2`,'1' AS `ref_t1` from `test`.`t4` join `test`.`t1` join `test`.`t3` where ((`test`.`t3`.`ref_t1` = '1') and (`test`.`t4`.`ref_t1` = '1')) EXPLAIN SELECT STRAIGHT_JOIN * FROM t4 JOIN (t1 join t3 on t3.ref_t1 = t1.c1 join t2 on t2.ref_t1 = t1.c1) on t4.ref_t1 = t1.c1; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t4 NULL ALL NULL NULL NULL NULL 4 100.00 NULL 1 SIMPLE t1 NULL ALL PRIMARY NULL NULL NULL 3 33.33 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t3 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 1 100.00 Using where; Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select straight_join `test`.`t4`.`c1` AS `c1`,`test`.`t4`.`c2` AS `c2`,`test`.`t4`.`ref_t1` AS `ref_t1`,`test`.`t1`.`c1` AS `c1`,`test`.`t1`.`c2` AS `c2`,`test`.`t3`.`c1` AS `c1`,`test`.`t3`.`c2` AS `c2`,`test`.`t3`.`ref_t1` AS `ref_t1`,`test`.`t2`.`c1` AS `c1`,`test`.`t2`.`c2` AS `c2`,`test`.`t2`.`ref_t1` AS `ref_t1` from `test`.`t4` join `test`.`t1` join `test`.`t3` join `test`.`t2` where ((`test`.`t1`.`c1` = `test`.`t4`.`ref_t1`) and (`test`.`t3`.`ref_t1` = `test`.`t4`.`ref_t1`) and (`test`.`t2`.`ref_t1` = `test`.`t4`.`ref_t1`)) EXPLAIN SELECT * FROM t4 STRAIGHT_JOIN (t1 join t3 on t3.ref_t1 = t1.c1 join t2 on t2.ref_t1 = t1.c1) on t4.ref_t1 = t1.c1; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t4 NULL ALL NULL NULL NULL NULL 4 100.00 Using where 1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 1 100.00 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t3 NULL ALL NULL NULL NULL NULL 2 50.00 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t1 NULL eq_ref PRIMARY PRIMARY 4 test.t4.ref_t1 1 100.00 NULL Warnings: Note 1003 /* select#1 */ select `test`.`t4`.`c1` AS `c1`,`test`.`t4`.`c2` AS `c2`,`test`.`t4`.`ref_t1` AS `ref_t1`,`test`.`t1`.`c1` AS `c1`,`test`.`t1`.`c2` AS `c2`,`test`.`t3`.`c1` AS `c1`,`test`.`t3`.`c2` AS `c2`,`test`.`t3`.`ref_t1` AS `ref_t1`,`test`.`t2`.`c1` AS `c1`,`test`.`t2`.`c2` AS `c2`,`test`.`t2`.`ref_t1` AS `ref_t1` from `test`.`t4` join `test`.`t1` join `test`.`t3` join `test`.`t2` where ((`test`.`t2`.`ref_t1` = `test`.`t4`.`ref_t1`) and (`test`.`t3`.`ref_t1` = `test`.`t4`.`ref_t1`) and (`test`.`t1`.`c1` = `test`.`t4`.`ref_t1`)) drop table t1,t2,t3,t4; # Bug#20455184: Assertion failed: join_cond in optimizer.cc CREATE TABLE t1(a INTEGER) engine=innodb; explain SELECT 1 FROM (SELECT 1 FROM t1 WHERE a) AS q NATURAL LEFT JOIN t1 NATURAL LEFT JOIN t1 AS t2; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 1 100.00 Using where 1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 1 100.00 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 1 100.00 Using where; Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select 1 AS `1` from `test`.`t1` left join `test`.`t1` on(1) left join `test`.`t1` `t2` on((`test`.`t2`.`a` = `test`.`t1`.`a`)) where `test`.`t1`.`a` SELECT 1 FROM (SELECT 1 FROM t1 WHERE a) AS q NATURAL LEFT JOIN t1 NATURAL LEFT JOIN t1 AS t2; 1 explain SELECT 1 FROM t1 NATURAL RIGHT JOIN t1 AS t2 NATURAL RIGHT JOIN (SELECT 1 FROM t1 WHERE a) AS q; id select_type table partitions type possible_keys key key_len ref rows filtered Extra 1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 1 100.00 Using where 1 SIMPLE t2 NULL ALL NULL NULL NULL NULL 1 100.00 Using where; Using join buffer (Block Nested Loop) 1 SIMPLE t1 NULL ALL NULL NULL NULL NULL 1 100.00 Using where; Using join buffer (Block Nested Loop) Warnings: Note 1003 /* select#1 */ select 1 AS `1` from `test`.`t1` left join (`test`.`t1` `t2` left join `test`.`t1` on((`test`.`t1`.`a` = `test`.`t2`.`a`))) on(1) where `test`.`t1`.`a` SELECT 1 FROM t1 NATURAL RIGHT JOIN t1 AS t2 NATURAL RIGHT JOIN (SELECT 1 FROM t1 WHERE a) AS q; 1 DROP TABLE t1; # Bug#21045724: Assertion '!table || !table->read_set ... CREATE TABLE t1 (pk INTEGER, dummy VARCHAR(64), col_check TINYINT, PRIMARY KEY(pk) ) engine=innodb; INSERT INTO t1 VALUES (13, '13', 13); CREATE VIEW v1 AS SELECT * FROM t1 WHERE pk BETWEEN 13 AND 14; PREPARE st1 FROM " UPDATE v1 AS a NATURAL JOIN v1 AS b SET a.dummy = '', b.col_check = NULL "; EXECUTE st1; EXECUTE st1; DEALLOCATE PREPARE st1; DROP VIEW v1; DROP TABLE t1;
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