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| ID# | Date | Updated | Type | Status | Sev | Version | OS | CPU | Summary |
|---|---|---|---|---|---|---|---|---|---|
| 14638 | 2005-11-04 13:10 | 2025-12-07 20:45 | MySQL Server: General | Verified (5905 days) | S5 | 5.0-BK, 5.1.43-bzr | Any (any) | Any | ptr_compare processes data only byte wise |
| 22487 | 2006-09-19 17:57 | 2020-05-03 20:45 | MySQL Server: DDL | Verified (6909 days) | S5 | 5.0.26 | Any | Any | mysql performs extremely slow when creating unique indexes on huge table |
| 24251 | 2006-11-13 10:58 | 2018-09-09 20:45 | MySQL Server: Optimizer | In progress (5924 days) | S5 | 5.0.30-BK, 5.1.12 | Linux (Linux, Win XP SP2) | Any | Non-optimal choice of indexes for queries |
| 36817 | 2008-05-20 13:19 | 2018-09-09 20:45 | MySQL Server: Optimizer | Verified (6065 days) | S5 | 5.0.54a,5.1.19, 5.1.25, 5.0.60, 5.5 | Any | Any | Non optimal index choice, depending on index creation order |
| 38251 | 2008-07-21 0:29 | 2020-05-03 20:45 | MySQL Server: Optimizer | Verified (6414 days) | S5 | 5.0.51 | Any | Any | Useless external queries should be ignored |
| 44968 | 2009-05-19 22:04 | 2025-10-12 20:45 | Connector / ODBC | Verified (5894 days) | S5 | 5.01.05.00 | Windows (XP SP3) | Any | Buffer length Vs column size for wide character resultset columns |
| 46376 | 2009-07-24 17:05 | 2026-01-04 20:45 | MySQL Server: Optimizer | Verified (6041 days) | S5 | 5.0.85, 5.1.36, 5.1.38, 5.1.39 | Windows (XP) | Any | Optimizer choose wrong index even when where clause and order-by are covered |
| 55606 | 2010-07-28 15:25 | 2015-08-30 17:21 | MySQL Server: Charsets | Verified (4661 days) | S5 | 5.1.47, 5.1.50-bzr, 5.5.23, 5.6.11 | Linux | Any | Charset on ENUMS influencing performance too much |
| 55733 | 2010-08-04 8:47 | 2012-05-18 20:19 | MySQL Server: Replication | Verified (5467 days) | S5 | 5.1.37 | Linux (CentOS 5.3) | Any | replication I/O slave is replicating statements that should be ignored |
| 59727 | 2011-01-25 21:36 | 2016-12-04 20:45 | MySQL Server: InnoDB storage engine | Verified | S5 | 5.1 plugin, 5.5, 5.6 | Any | Any | LRU search can be inefficient with compression |
| 62018 | 2011-07-28 15:15 | 2018-02-11 20:45 | MySQL Server: InnoDB storage engine | Verified (4774 days) | S5 | 5.6.3 | Any | Any | innodb adaptive hash index mutex contention |
| 64344 | 2012-02-15 17:00 | 2015-01-16 19:40 | MySQL Server: InnoDB Plugin storage engine | Verified (5087 days) | S5 | 5.1.52 | Any | Any | malloc, free done for compressed pages when buffer pool mutex locked |
| 65177 | 2012-05-02 9:43 | 2020-05-03 20:45 | MySQL Server: Optimizer | Verified (5028 days) | S5 | 5.1,5.5 | Any | Any | perromance issue of "order by rand()" |
| 67913 | 2012-12-16 2:31 | 2025-10-12 20:45 | Connector / ODBC | Verified (4769 days) | S5 | 5.2.2, 5.1.11 | Windows (Windows 7 and 8 64-bit) | Any | ODBC connector performance problem |
| 68554 | 2013-03-03 16:16 | 2022-03-14 16:43 | MySQL Server: Optimizer | Verified (4713 days) | S5 | 5.6.10 | Any | Any | Optimizer wrongly choses covering index over ICP |
| 69276 | 2013-05-18 19:23 | 2014-11-05 15:15 | MySQL Server: InnoDB storage engine | Verified (4651 days) | S5 | 5.6.11 | Any | Any | fil_system->mutex contention limits block read rate with fast storage |
| 70265 | 2013-09-06 18:10 | 2015-08-23 20:45 | MySQL Server: Partitions | Verified (4538 days) | S5 | 5.6.13 | Any | Any | Optimizer under-estimates rows when there are many unmatched partitions |
| 70950 | 2013-11-19 7:03 | 2015-06-28 20:45 | MySQL Server: InnoDB storage engine | Verified (4466 days) | S5 | 5.7+ | Any | Any | log_sys->mutex is so hot in pure write cases |
| 71804 | 2014-02-22 22:29 | 2020-09-13 20:45 | MySQL Server: Optimizer | Verified (4132 days) | S5 | 5.6.6 m9, 5.5.32, 5.1.61 | Any (sqlfiddle.com) | Any | Unnecessary filesort when joining on unique column using group by. |
| 102599 | 2021-02-15 12:11 | 2025-10-05 20:45 | MySQL Server: GIS | Verified (1821 days) | S5 | 8.0.22 | Windows (Win 10) | x86 (NVMe RAM) | Slow performance of MySQL 8 compared with 5.7 on geographical SELECT |
| 2122 | 2003-12-15 13:53 | 2017-12-23 10:43 | MySQL Server: Replication | Verified (6726 days) | S3 | 4.0,5.1 | Any (all) | Any | changing hostname confuses master or slave |
| 2742 | 2004-02-12 5:25 | 2025-12-07 20:45 | MySQL Server: Command-line Clients | Verified (6923 days) | S3 | mysqlimport Ver 2.8 | Any (3.23.58 RH linux gnu i386) | Any | fields-escaped-by only allows single character separator! |
| 6105 | 2004-10-14 18:06 | 2022-12-04 20:45 | MySQL Server: Errors | Verified (4417 days) | S3 | 5.0.2-alpha-debug | Linux (SuSE 9.1) | Any | Traditional: Division with small float equalt to zero should return error |
| 7083 | 2004-12-07 20:30 | 2017-11-11 19:11 | MySQL Server: Data Types | Verified (4417 days) | S3 | 5.0.3-alpha-debug | Linux (SuSE 9.1) | Any | CHAR columns should report correct length |
| 7604 | 2004-12-31 20:13 | 2020-05-03 20:45 | MySQL Server: Optimizer | Verified (5903 days) | S3 | 5.0.21-BK, 6.0.14 | Linux (Linux) | Any | Row subqueries don't work with ALL |
| 7861 | 2005-01-13 6:19 | 2022-12-04 20:45 | MySQL Server: Security: Privileges | Verified (7224 days) | S3 | any | Any (any) | Any | Column level security inconsistent with db/table level security |
| 7882 | 2005-01-13 18:02 | 2025-12-07 20:45 | Connector / ODBC | Verified (6344 days) | S3 | all | Any (all) | Any | Function CONVERT ODBC database independent types not translated |
| 8423 | 2005-02-10 20:54 | 2022-12-04 20:45 | MySQL Server: Errors | Verified (4416 days) | S3 | 5.0.3-alpha-debug | Linux (SuSE 9.1) | Any | Traditional: Division by 0 returns NULL |
| 8463 | 2005-02-11 23:30 | 2020-05-03 20:45 | MySQL Server: DML | Verified (6344 days) | S3 | 5.0.3-alpha-debug | Linux (SuSE 9.1) | Any | SQRT: Should return an error when argument is negative |
| 8485 | 2005-02-13 0:40 | 2020-05-03 20:45 | MySQL Server: Data Types | Verified (6344 days) | S3 | 5.0.3-alpha-debug | Linux (SuSE 9.1) | Any | BOOLEAN: Silent data type change to TINYINT |
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