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Added missing PCRR2 documentation to regexfilter.

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The regexfilter was missing the documentation for the PCRE2 changes.
This commit is contained in:
Markus Makela
2015-12-06 11:00:04 +02:00
parent a04389fc3b
commit e9fcb76b02
1 changed files with 6 additions and 2 deletions
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8
Documentation/Filters/Regex-Filter.md
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@ -2,7 +2,11 @@ Regex Filter
# Overview
The regex filter is a filter module for MaxScale that is able to rewrite query content using regular expression matches and text substitution.
The regex filter is a filter module for MaxScale that is able to rewrite query content using regular expression matches and text substitution. It uses the PCRE2 syntax which differs from the POSIX regular expressions used in MaxScale versions prior to 1.3.0.
For all details about the PCRE2 syntax, please read the [PCRE2 syntax documentation](http://www.pcre.org/current/doc/html/pcre2syntax.html).
Please note that the PCRE2 library uses a different syntax to refer to capture groups in the replacement string. The main difference is the usage of the dollar character instead of the backslash character for references e.g. `$1` instead of `\1`. For more details about the replacement string differences, please read the [Creating a new string with substitutions](http://www.pcre.org/current/doc/html/pcre2api.html#SEC34) chapter in the PCRE2 manual.
# Configuration
@ -93,7 +97,7 @@ MySQL 5.1 used the parameter TYPE = to set the storage engine that should be use
type=filter
module=regexfilter
options=ignorecase
match=TYPE[ ]*=
match=TYPE\s*=
replace=ENGINE=
[MyService]