Difference between revisions of "MySQL Features & Bugs"
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* '''Automatic Initialization and Updating for TIMESTAMP and DATETIME''': added in 5.6.5 | ==Features== | ||
* '''Virtual/Generated Columns''': added in 5.7.9 | * '''Automatic Initialization and Updating for TIMESTAMP and DATETIME''': added in 5.6.5 [https://dev.mysql.com/doc/refman/5.6/en/timestamp-initialization.html Source] | ||
* '''Virtual/Generated Columns''': added in 5.7.9 [https://dev.mysql.com/doc/relnotes/mysql/5.7/en/news-5-7-9.html Source] | |||
* '''JSON Column Data Type''': added in 5.7.8 JSON Data Type: [https://dev.mysql.com/doc/refman/5.7/en/json.html Source] | |||
==Weird Bugs== | |||
===DEFAULT NULL=== | |||
<source lang="mysql"> | |||
x INT DEFAULT NULL #works in all versions | |||
x TIMESTAMP DEFAULT NULL #works in some versions, and not in others | |||
x TIMESTAMP NULL DEFAULT NULL #seems to work in all? | |||
</source> | |||
This seems like a bug, but it changed between devdb and cloud (so between 5.7.15 and 5.7.24) | |||
===LEFT JOINs act like JOINs sometimes when using ODBC date format=== | |||
This is [https://bugs.mysql.com/bug.php?id=69233 a bug in at least MySQL versions 5.6.10 - 5.6.21] that affects Crystal reports. | |||
<br>Reportedly, 5.5.31 is fine, and we know 5.6.22 and 5.7.6 have the bug fix (See Fogbugz {{case|13362}}). | |||
https://bugs.mysql.com/bug.php?id=97067 | |||
Latest revision as of 14:41, 14 July 2022
Features
- Automatic Initialization and Updating for TIMESTAMP and DATETIME: added in 5.6.5 Source
- Virtual/Generated Columns: added in 5.7.9 Source
- JSON Column Data Type: added in 5.7.8 JSON Data Type: Source
Weird Bugs
DEFAULT NULL
x INT DEFAULT NULL #works in all versions
x TIMESTAMP DEFAULT NULL #works in some versions, and not in others
x TIMESTAMP NULL DEFAULT NULL #seems to work in all?
This seems like a bug, but it changed between devdb and cloud (so between 5.7.15 and 5.7.24)
LEFT JOINs act like JOINs sometimes when using ODBC date format
This is a bug in at least MySQL versions 5.6.10 - 5.6.21 that affects Crystal reports.
Reportedly, 5.5.31 is fine, and we know 5.6.22 and 5.7.6 have the bug fix (See Fogbugz Case 13362).
