REGEXP_REPLACE was introduced in MariaDB 10.0.5.
 
Syntax
------ 
REGEXP_REPLACE(subject, pattern, replace)
 
Description
----------- 
REGEXP_REPLACE returns the string subject with all
occurrences of the regular expression pattern replaced by
the string replace. If no occurrences are found, then
subject is returned as is.
 
The replace string can have backreferences to the
subexpressions in the form \N, where N is a number from 1
to 9.
 
The function follows the case sensitivity rules of the
effective collation. Matching is performed case
insensitively for case insensitive collations, and case
sensitively for case sensitive collations and for binary
data.
 
The collation case sensitivity can be overwritten using the
(?i) and (?-i) PCRE flags.
 
MariaDB 10.0.5 switched to the PCRE regular expression
library for enhanced regular expression performance, and
REGEXP_REPLACE was introduced as part of this enhancement.
 
MariaDB 10.0.11 introduced the default_regex_flags variable
to address the remaining compatibilities between PCRE and
the old regex library. 
 
Examples
-------- 
SELECT REGEXP_REPLACE('ab12cd','[0-9]','') AS
remove_digits;
-> abcd
 
SELECT REGEXP_REPLACE('titlebody', '',' ')
AS strip_html;
-> title body
 
Backreferences to the subexpressions in the form \N, where
N is a number from 1 to 9:
 
SELECT REGEXP_REPLACE('James Bond','^(.*)
(.*)$','\\2, \\1') AS reorder_name;
-> Bond, James
 
Case insensitive and case sensitive matches:
 
SELECT REGEXP_REPLACE('ABC','b','-') AS
case_insensitive;
-> A-C
 
SELECT REGEXP_REPLACE('ABC' COLLATE utf8_bin,'b','-')
AS case_sensitive;
-> ABC
 
SELECT REGEXP_REPLACE(BINARY 'ABC','b','-') AS
binary_data;
-> ABC
 
Overwriting the collation case sensitivity using the (?i)
and (?-i) PCRE flags.
 
SELECT REGEXP_REPLACE('ABC','(?-i)b','-') AS
force_case_sensitive;
-> ABC
 
SELECT REGEXP_REPLACE(BINARY 'ABC','(?i)b','-') AS
force_case_insensitive;
-> A-C
 

 
 
 
 
 
 
 

URL: https://mariadb.com/kb/en/regexp_replace/