MySQL Bugs: #89462: The unit of regexp_time_limit should be described in doc

Bug #89462	The unit of regexp_time_limit should be described in doc
Submitted:	30 Jan 2018 6:40	Modified:	2 Feb 2018 13:44
Reporter:	Tsubasa Tanaka (OCA)	Email Updates:
Status:	Closed	Impact on me:	None
Category:	MySQL Server: Documentation	Severity:	S3 (Non-critical)
Version:	8.0	OS:	Any
Assigned to:		CPU Architecture:	Any

Description:
regex_time_limit system variable doesn't describe what is its time-unit.
mysqld --help --verbose describes regex_time_limit's time-unit is "typically on the order of milliseconds".

icu::RegexMatcher::setTimeLimit describes "typically on the order of milliseconds" too.

http://icu-project.org/apiref/icu4c/classicu_1_1RegexMatcher.html#a6ebcfcab4fe6a38678c0291...

MySQL doc should describe that.

How to repeat:
See https://dev.mysql.com/doc/refman/8.0/en/server-system-variables.html#sysvar_regexp_time_li...

```
$ /usr/mysql/8.0.4/bin/mysqld --no-defaults --help --verbose | grep -A2 regexp-time-limit
..
  --regexp-time-limit=#
                      Timeout for regular expressions matches, in steps of the
                      match engine, typically on the order of milliseconds.
--
..
```

Suggested fix:
Append "typically on the order of milliseconds" into current description.

Hello Tanaka-San,

Thank you for the report and feedback!

Thanks,
Umesh

Posted by developer:
 
Updated:

* https://dev.mysql.com/doc/refman/8.0/en/regexp.html#regexp-resource-control
* https://dev.mysql.com/doc/refman/8.0/en/server-system-variables.html#sysvar_regexp_time_li...