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ID# Date Updated Type Status Sev Version Target OS CPU Summary Assigned
728922014-06-05
16:27
2014-06-09
9:39
MySQL Server: OptimizerVerified
(1868 days)
S3AnyAnyPlease allow multiple ranges in the LIMIT clause  
177652006-02-28
11:12
2018-09-09
20:45
MySQL Server: OptimizerVerified
(4890 days)
S3AnyAnyBug in libMySQL.dll with EXPLAIN Evgeny Potemkin
468532009-08-21
11:07
2018-09-09
20:45
MySQL Server: OptimizerVerified
(3525 days)
S3AnyAnyvalgrind warnings in mysql-pe branch with the testcase for the BUG#45816  
640362012-01-15
15:51
2012-01-15
19:07
MySQL Server: OptimizerVerified
(2744 days)
S3AnyAnyUse non-materializing loose-scan-merge for certain subqueries in FROM with LIMIT  
914862018-06-29
7:21
2019-06-04
12:34
MySQL Server: OptimizerVerified
(384 days)
S2AnyAnyWrong column type , view , binary  
961372019-07-09
9:20
2019-07-09
16:25
MySQL Server: OptimizerVerified
(12 days)
S2 5.7.17 MySQL Community ServerLinuxAnyNOT(NOT( FIELD > ALL (SUBQUERY) )) 'S RESULT NOT EQUAL FIELD > ALL (SUBQUERY)  
954622019-05-21
18:42
2019-05-22
5:55
MySQL Server: OptimizerVerified
(60 days)
S3 8.0.16AnyAnyData comparison broke in MySQL 8.0.16  
910912018-05-31
13:08
2018-11-22
17:07
MySQL Server: OptimizerVerified
(416 days)
S1>= 5.7.18, 5.7.22AnyAnyInconsistent SELECT...ORDER BY results with euckr charset / euckr_bin collation  
818032016-06-10
12:35
2016-06-15
16:58
MySQL Server: OptimizerVerified
(1131 days)
S5>=5.1AnyAnyMysql 5.1 and later Update performance regression  
70802004-12-07
15:23
2018-09-09
20:45
MySQL Server: OptimizerVerified
(5286 days)
S34.0Linux (Linux)AnyOptimizer choose incorrect index  
186882006-03-31
14:07
2018-09-09
20:45
MySQL Server: OptimizerVerified
(4335 days)
S34.0, 4.1, 5.0Linux (linux)Anynon-optimal plan for SELECT  
392982008-09-08
6:42
2018-09-09
20:45
MySQL Server: OptimizerVerified
(3793 days)
S34.0, 4.1, 5.0, 5.1, 6.0AnyAnyPrefix key search returns wrong result for multi-level collations  
80362005-01-20
10:12
2018-09-09
20:45
MySQL Server: OptimizerVerified
(5286 days)
S34.0.18, 4.1.10, 5.1.52FreeBSD (Free BSD 4.5, Linux)AnyBad optimization of ORDER BY ... LIMIT 1 if one table is MyISAM, another InnoDB  
250682006-12-14
11:56
2018-09-09
20:45
MySQL Server: OptimizerVerified
(3930 days)
S34.0.27, 5.0.19, 5.0.36-BKLinux (Linux)AnyMyISAM-Optimizer prefers full table scan than index for IN with >15 elements  
284042007-05-13
18:33
2018-11-11
14:44
MySQL Server: OptimizerVerified
(252 days)
S24.0.31, 4.1.25, 4.1.26, 5.0.42-BK, 5.0.46, 5.1.33LinuxAnyOptimizer does not consider index that can be used for ORDER BY  
399442008-10-09
2:10
2018-09-09
20:45
MySQL Server: OptimizerVerified
(3937 days)
S34.1, 5.0, 5,1, 6.0 bzrAnyAnyWith join buffer executor ignores index scan  
521742010-03-18
10:59
2018-09-09
20:45
MySQL Server: OptimizerVerified
(3393 days)
S34.1, 5.0, 5.1AnyAnySometimes wrong plan when reading a MAX value from non-NULL index Assigned Account
428082009-02-12
22:17
2018-09-09
20:45
MySQL Server: OptimizerVerified
(3810 days)
S54.1, 5.0, 5.1AnyAnyExecution Plan Cache  
370532008-05-29
4:11
2018-09-09
20:45
MySQL Server: OptimizerVerified
(3960 days)
S34.1, 5.0, 5.1,6.0.5Any (Linux, Solaris)AnyOptimizer unnecessarily uses temporary and filesort with ORDER BY Assigned Account
340782008-01-26
14:19
2018-09-09
20:45
MySQL Server: OptimizerVerified
(4167 days)
S34.1,5.0,5.1,6.0-BKAny (Linux)Anyref access is not used for varchar column Evgeny Potemkin
87492005-02-23
21:08
2018-09-09
20:45
MySQL Server: OptimizerVerified
(3581 days)
S34.1.10, 5.0.67Any (*)AnyEXPLAIN report different "type" w and w/o USE INDEX(...) for the same used key  
201112006-05-28
10:57
2014-01-24
13:26
MySQL Server: OptimizerVerified
(2004 days)
S54.1.19-logLinux (Linux)Anynamed columns used in subqueries hinder optimisation of LIKE, BETWEEN, range  
262322007-02-09
17:28
2018-09-09
20:45
MySQL Server: OptimizerVerified
(4539 days)
S34.1.22, 5.0.34, 5.0.36-BKLinux (Linux)Anyreview of bug #20944 / proof of concept attached  
285542007-05-21
9:32
2018-09-09
20:45
MySQL Server: OptimizerVerified
(3712 days)
S34.1.22, 5.0.42-BKAnyAnyOptimizer wrongly prefers index for (col = value) over (PK <= value)  
363002008-04-23
17:49
2018-09-09
20:45
MySQL Server: OptimizerVerified
(3477 days)
S34.1.26, 5.0.32, 5.0+, 5.1.43-bzr, 6.0.14-bzrLinuxAnymin() and max() functions returns NULL when using NOT + BETWEEN in where  
808022016-03-21
9:22
2016-03-21
10:56
MySQL Server: OptimizerVerified
(1217 days)
S35..1/5.5/5.6/57AnyAny"ORDER BY expression" does not allow alias to aggregate  
119482005-07-14
18:00
2018-09-09
20:45
MySQL Server: OptimizerVerified
(5100 days)
S35.0AnyAnyMyISAM only, nested JOIN Views, dramatic performance loss  
426772009-02-08
3:26
2018-09-09
20:45
MySQL Server: OptimizerVerified
(3814 days)
S35.0 and 5.1AnyAnyMySQL Optimizer does not work right with truncation Assigned Account
140842005-10-17
20:09
2014-01-23
9:50
MySQL Server: OptimizerVerified
(2005 days)
S35.0-bkAnyAnyindex_merge access method not used for federated engine Assigned Account
81682005-01-27
18:09
2018-09-09
20:45
MySQL Server: OptimizerVerified
(2004 days)
S35.0-bkAnyAnyHELP commands processing different from regular with --ps-protocol  
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