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MDEV-4425 REGEXP enhancements
2013-09-26 16:02:17 +02:00
SET NAMES utf8;
#
# MDEV-4425 REGEXP enhancements
#
#
# Checking RLIKE
#
SELECT 'à' RLIKE '^.$';
'à' RLIKE '^.$'
1
SELECT 'à' RLIKE '\\x{00E0}';
'à' RLIKE '\\x{00E0}'
1
SELECT 'À' RLIKE '\\x{00E0}';
'À' RLIKE '\\x{00E0}'
1
SELECT 'à' RLIKE '\\x{00C0}';
'à' RLIKE '\\x{00C0}'
1
SELECT 'À' RLIKE '\\x{00C0}';
'À' RLIKE '\\x{00C0}'
1
SELECT 'à' RLIKE '\\x{00E0}' COLLATE utf8_bin;
'à' RLIKE '\\x{00E0}' COLLATE utf8_bin
1
SELECT 'À' RLIKE '\\x{00E0}' COLLATE utf8_bin;
'À' RLIKE '\\x{00E0}' COLLATE utf8_bin
0
SELECT 'à' RLIKE '\\x{00C0}' COLLATE utf8_bin;
'à' RLIKE '\\x{00C0}' COLLATE utf8_bin
0
SELECT 'À' RLIKE '\\x{00C0}' COLLATE utf8_bin;
'À' RLIKE '\\x{00C0}' COLLATE utf8_bin
1
MDEV-4425 Regexp enhancements Adding more tests for case sensitivity, with various collation and (?i) flags combinations.
2013-10-03 12:24:16 +02:00
CREATE TABLE t1 (s VARCHAR(10) CHARACTER SET utf8);
INSERT INTO t1 VALUES ('a'),('A');
CREATE TABLE t2 (p VARCHAR(10) CHARACTER SET utf8);
INSERT INTO t2 VALUES ('a'),('(?i)a'),('(?-i)a'),('A'),('(?i)A'),('(?-i)A');
SELECT s,p,s RLIKE p, s COLLATE utf8_bin RLIKE p FROM t1,t2 ORDER BY BINARY s, BINARY p;
s p s RLIKE p s COLLATE utf8_bin RLIKE p
A (?-i)A 1 1
A (?-i)a 0 0
A (?i)A 1 1
A (?i)a 1 1
A A 1 1
A a 1 0
a (?-i)A 0 0
a (?-i)a 1 1
a (?i)A 1 1
a (?i)a 1 1
a A 1 0
a a 1 1
DROP TABLE t1,t2;
MDEV-4425 REGEXP enhancements
2013-09-26 16:02:17 +02:00
CREATE TABLE t1 (ch VARCHAR(22)) CHARACTER SET utf8;
CREATE TABLE t2 (class VARCHAR(32)) CHARACTER SET utf8;
INSERT INTO t1 VALUES ('Я'),('Σ'),('A'),('À');
INSERT INTO t1 VALUES ('я'),('σ'),('a'),('à');
INSERT INTO t1 VALUES ('㐗'),('갷'),('ප');
INSERT INTO t1 VALUES ('1'),('௨');
INSERT INTO t2 VALUES ('\\p{Cyrillic}'),('\\p{Greek}'),('\\p{Latin}');
INSERT INTO t2 VALUES ('\\p{Han}'),('\\p{Hangul}');
INSERT INTO t2 VALUES ('\\p{Sinhala}'), ('\\p{Tamil}');
INSERT INTO t2 VALUES ('\\p{L}'),('\\p{Ll}'),('\\p{Lu}'),('\\p{L&}');
INSERT INTO t2 VALUES ('[[:alpha:]]'),('[[:digit:]]');
SELECT class, ch, ch RLIKE class FROM t1, t2 ORDER BY class, BINARY ch;
class ch ch RLIKE class
[[:alpha:]] 1 0
[[:alpha:]] A 1
[[:alpha:]] a 1
[[:alpha:]] À 1
[[:alpha:]] à 1
[[:alpha:]] Σ 1
[[:alpha:]] σ 1
[[:alpha:]] Я 1
[[:alpha:]] я 1
[[:alpha:]] ௨ 0
[[:alpha:]] ප 1
[[:alpha:]] 㐗 1
[[:alpha:]] 갷 1
[[:digit:]] 1 1
[[:digit:]] A 0
[[:digit:]] a 0
[[:digit:]] À 0
[[:digit:]] à 0
[[:digit:]] Σ 0
[[:digit:]] σ 0
[[:digit:]] Я 0
[[:digit:]] я 0
[[:digit:]] ௨ 1
[[:digit:]] ප 0
[[:digit:]] 㐗 0
[[:digit:]] 갷 0
\p{Cyrillic} 1 0
\p{Cyrillic} A 0
\p{Cyrillic} a 0
\p{Cyrillic} À 0
\p{Cyrillic} à 0
\p{Cyrillic} Σ 0
\p{Cyrillic} σ 0
\p{Cyrillic} Я 1
\p{Cyrillic} я 1
\p{Cyrillic} ௨ 0
\p{Cyrillic} ප 0
\p{Cyrillic} 㐗 0
\p{Cyrillic} 갷 0
\p{Greek} 1 0
\p{Greek} A 0
\p{Greek} a 0
\p{Greek} À 0
\p{Greek} à 0
\p{Greek} Σ 1
\p{Greek} σ 1
\p{Greek} Я 0
\p{Greek} я 0
\p{Greek} ௨ 0
\p{Greek} ප 0
\p{Greek} 㐗 0
\p{Greek} 갷 0
\p{Hangul} 1 0
\p{Hangul} A 0
\p{Hangul} a 0
\p{Hangul} À 0
\p{Hangul} à 0
\p{Hangul} Σ 0
\p{Hangul} σ 0
\p{Hangul} Я 0
\p{Hangul} я 0
\p{Hangul} ௨ 0
\p{Hangul} ප 0
\p{Hangul} 㐗 0
\p{Hangul} 갷 1
\p{Han} 1 0
\p{Han} A 0
\p{Han} a 0
\p{Han} À 0
\p{Han} à 0
\p{Han} Σ 0
\p{Han} σ 0
\p{Han} Я 0
\p{Han} я 0
\p{Han} ௨ 0
\p{Han} ප 0
\p{Han} 㐗 1
\p{Han} 갷 0
\p{L&} 1 0
\p{L&} A 1
\p{L&} a 1
\p{L&} À 1
\p{L&} à 1
\p{L&} Σ 1
\p{L&} σ 1
\p{L&} Я 1
\p{L&} я 1
\p{L&} ௨ 0
\p{L&} ප 0
\p{L&} 㐗 0
\p{L&} 갷 0
\p{Latin} 1 0
\p{Latin} A 1
\p{Latin} a 1
\p{Latin} À 1
\p{Latin} à 1
\p{Latin} Σ 0
\p{Latin} σ 0
\p{Latin} Я 0
\p{Latin} я 0
\p{Latin} ௨ 0
\p{Latin} ප 0
\p{Latin} 㐗 0
\p{Latin} 갷 0
\p{Ll} 1 0
\p{Ll} A 0
\p{Ll} a 1
\p{Ll} À 0
\p{Ll} à 1
\p{Ll} Σ 0
\p{Ll} σ 1
\p{Ll} Я 0
\p{Ll} я 1
\p{Ll} ௨ 0
\p{Ll} ප 0
\p{Ll} 㐗 0
\p{Ll} 갷 0
\p{Lu} 1 0
\p{Lu} A 1
\p{Lu} a 0
\p{Lu} À 1
\p{Lu} à 0
\p{Lu} Σ 1
\p{Lu} σ 0
\p{Lu} Я 1
\p{Lu} я 0
\p{Lu} ௨ 0
\p{Lu} ප 0
\p{Lu} 㐗 0
\p{Lu} 갷 0
\p{L} 1 0
\p{L} A 1
\p{L} a 1
\p{L} À 1
\p{L} à 1
\p{L} Σ 1
\p{L} σ 1
\p{L} Я 1
\p{L} я 1
\p{L} ௨ 0
\p{L} ප 1
\p{L} 㐗 1
\p{L} 갷 1
\p{Sinhala} 1 0
\p{Sinhala} A 0
\p{Sinhala} a 0
\p{Sinhala} À 0
\p{Sinhala} à 0
\p{Sinhala} Σ 0
\p{Sinhala} σ 0
\p{Sinhala} Я 0
\p{Sinhala} я 0
\p{Sinhala} ௨ 0
\p{Sinhala} ප 1
\p{Sinhala} 㐗 0
\p{Sinhala} 갷 0
\p{Tamil} 1 0
\p{Tamil} A 0
\p{Tamil} a 0
\p{Tamil} À 0
\p{Tamil} à 0
\p{Tamil} Σ 0
\p{Tamil} σ 0
\p{Tamil} Я 0
\p{Tamil} я 0
\p{Tamil} ௨ 1
\p{Tamil} ප 0
\p{Tamil} 㐗 0
\p{Tamil} 갷 0
DROP TABLE t1, t2;
MDEV-4425 Regexp enhancements Do not pass PCRE_UCP flag for binary data. This makes bytes 0x80..FF not to belong to generic character classes \d (digit) and \w (word character). SELECT 0xFF RLIKE '\\w'; -> 0 Note, this change does not affect non-binary data, which is still examined with the PCRE_UCP flag by default.
2013-10-08 16:25:17 +02:00
SELECT 0xFF RLIKE '\\w';
0xFF RLIKE '\\w'
0
SELECT 0xFF RLIKE '(*UCP)\\w';
0xFF RLIKE '(*UCP)\\w'
1
MDEV-4425 REGEXP enhancements
2013-09-26 16:02:17 +02:00
SELECT '\n' RLIKE '(*CR)';
'\n' RLIKE '(*CR)'
1
SELECT '\n' RLIKE '(*LF)';
'\n' RLIKE '(*LF)'
1
SELECT '\n' RLIKE '(*CRLF)';
'\n' RLIKE '(*CRLF)'
1
SELECT '\n' RLIKE '(*ANYCRLF)';
'\n' RLIKE '(*ANYCRLF)'
1
SELECT '\n' RLIKE '(*ANY)';
'\n' RLIKE '(*ANY)'
1
SELECT 'a\nb' RLIKE '(*LF)(?m)^a$';
'a\nb' RLIKE '(*LF)(?m)^a$'
1
SELECT 'a\nb' RLIKE '(*CR)(?m)^a$';
'a\nb' RLIKE '(*CR)(?m)^a$'
0
SELECT 'a\nb' RLIKE '(*CRLF)(?m)^a$';
'a\nb' RLIKE '(*CRLF)(?m)^a$'
0
SELECT 'a\nb' RLIKE '(*ANYCRLF)(?m)^a$';
'a\nb' RLIKE '(*ANYCRLF)(?m)^a$'
1
SELECT 'a\rb' RLIKE '(*LF)(?m)^a$';
'a\rb' RLIKE '(*LF)(?m)^a$'
0
SELECT 'a\rb' RLIKE '(*CR)(?m)^a$';
'a\rb' RLIKE '(*CR)(?m)^a$'
1
SELECT 'a\rb' RLIKE '(*CRLF)(?m)^a$';
'a\rb' RLIKE '(*CRLF)(?m)^a$'
0
SELECT 'a\rb' RLIKE '(*ANYCRLF)(?m)^a$';
'a\rb' RLIKE '(*ANYCRLF)(?m)^a$'
1
SELECT 'a\r\nb' RLIKE '(*LF)(?m)^a$';
'a\r\nb' RLIKE '(*LF)(?m)^a$'
0
SELECT 'a\r\nb' RLIKE '(*CR)(?m)^a$';
'a\r\nb' RLIKE '(*CR)(?m)^a$'
1
SELECT 'a\r\nb' RLIKE '(*CRLF)(?m)^a$';
'a\r\nb' RLIKE '(*CRLF)(?m)^a$'
1
SELECT 'a\r\nb' RLIKE '(*ANYCRLF)(?m)^a$';
'a\r\nb' RLIKE '(*ANYCRLF)(?m)^a$'
1
SELECT 'aa' RLIKE '(a)\\g1';
'aa' RLIKE '(a)\\g1'
1
SELECT 'aa bb' RLIKE '(a)\\g1 (b)\\g2';
'aa bb' RLIKE '(a)\\g1 (b)\\g2'
1
SELECT 'aaaaa' RLIKE 'a{0,5}';
'aaaaa' RLIKE 'a{0,5}'
1
SELECT 'aaaaa' RLIKE 'a{1,3}';
'aaaaa' RLIKE 'a{1,3}'
1
SELECT 'aaaaa' RLIKE 'a{0,}';
'aaaaa' RLIKE 'a{0,}'
1
SELECT 'aaaaa' RLIKE 'a{10,20}';
'aaaaa' RLIKE 'a{10,20}'
0
SELECT 'aabb' RLIKE 'a(?R)?b';
'aabb' RLIKE 'a(?R)?b'
1
SELECT 'aabb' RLIKE 'aa(?R)?bb';
'aabb' RLIKE 'aa(?R)?bb'
1
SELECT 'abcc' RLIKE 'a(?>bc|b)c';
'abcc' RLIKE 'a(?>bc|b)c'
1
SELECT 'abc' RLIKE 'a(?>bc|b)c';
'abc' RLIKE 'a(?>bc|b)c'
0
SELECT 'ab' RLIKE 'a(?!b)';
'ab' RLIKE 'a(?!b)'
0
SELECT 'ac' RLIKE 'a(?!b)';
'ac' RLIKE 'a(?!b)'
1
SELECT 'ab' RLIKE 'a(?=b)';
'ab' RLIKE 'a(?=b)'
1
SELECT 'ac' RLIKE 'a(?=b)';
'ac' RLIKE 'a(?=b)'
0
SELECT 'ab' RLIKE '(?<!a)b';
'ab' RLIKE '(?<!a)b'
0
SELECT 'cb' RLIKE '(?<!a)b';
'cb' RLIKE '(?<!a)b'
1
SELECT 'ab' RLIKE '(?<=a)b';
'ab' RLIKE '(?<=a)b'
1
SELECT 'cb' RLIKE '(?<=a)b';
'cb' RLIKE '(?<=a)b'
0
SELECT 'aa' RLIKE '(?P<pattern>a)(?P=pattern)';
'aa' RLIKE '(?P<pattern>a)(?P=pattern)'
1
SELECT 'aba' RLIKE '(?P<pattern>a)b(?P=pattern)';
'aba' RLIKE '(?P<pattern>a)b(?P=pattern)'
1
SELECT 'a' RLIKE 'a(?#comment)';
'a' RLIKE 'a(?#comment)'
1
SELECT 'aa' RLIKE 'a(?#comment)a';
'aa' RLIKE 'a(?#comment)a'
1
SELECT 'aba' RLIKE 'a(?#b)a';
'aba' RLIKE 'a(?#b)a'
0
SELECT 'aaa' RLIKE '\\W\\W\\W';
'aaa' RLIKE '\\W\\W\\W'
0
SELECT '%' RLIKE '\\W';
'%' RLIKE '\\W'
1
SELECT '%a$' RLIKE '\\W.\\W';
'%a$' RLIKE '\\W.\\W'
1
SELECT '123' RLIKE '\\d\\d\\d';
'123' RLIKE '\\d\\d\\d'
1
SELECT 'aaa' RLIKE '\\d\\d\\d';
'aaa' RLIKE '\\d\\d\\d'
0
SELECT '1a3' RLIKE '\\d.\\d';
'1a3' RLIKE '\\d.\\d'
1
SELECT 'a1b' RLIKE '\\d.\\d';
'a1b' RLIKE '\\d.\\d'
0
SELECT '8' RLIKE '\\D';
'8' RLIKE '\\D'
0
SELECT 'a' RLIKE '\\D';
'a' RLIKE '\\D'
1
SELECT '%' RLIKE '\\D';
'%' RLIKE '\\D'
1
SELECT 'a1' RLIKE '\\D\\d';
'a1' RLIKE '\\D\\d'
1
SELECT 'a1' RLIKE '\\d\\D';
'a1' RLIKE '\\d\\D'
0
SELECT '\t' RLIKE '\\s';
'\t' RLIKE '\\s'
1
SELECT '\r' RLIKE '\\s';
'\r' RLIKE '\\s'
1
SELECT '\n' RLIKE '\\s';
'\n' RLIKE '\\s'
1
SELECT '\v' RLIKE '\\s';
'\v' RLIKE '\\s'
0
SELECT 'a' RLIKE '\\S';
'a' RLIKE '\\S'
1
SELECT '1' RLIKE '\\S';
'1' RLIKE '\\S'
1
SELECT '!' RLIKE '\\S';
'!' RLIKE '\\S'
1
SELECT '.' RLIKE '\\S';
'.' RLIKE '\\S'
1
MDEV-4425 Regexp enhancements Adding tests with 0x00 characters from Bug#70470 REGEXP fails to find matches after NUL character
2013-10-03 12:28:57 +02:00
SELECT 'abc\0def' REGEXP 'def';
'abc\0def' REGEXP 'def'
1
SELECT 'abc\0def' REGEXP 'abc\\x{00}def';
'abc\0def' REGEXP 'abc\\x{00}def'
1
SELECT HEX(REGEXP_SUBSTR('abc\0def','abc\\x{00}def'));
HEX(REGEXP_SUBSTR('abc\0def','abc\\x{00}def'))
61626300646566
MDEV-4425 REGEXP enhancements
2013-09-26 16:02:17 +02:00
#
# Checking REGEXP_REPLACE
#
CREATE TABLE t1 AS SELECT REGEXP_REPLACE('abc','b','x');
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`REGEXP_REPLACE('abc','b','x')` longtext CHARACTER SET utf8 NOT NULL
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE t1;
EXPLAIN EXTENDED SELECT REGEXP_REPLACE('abc','b','x');
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 select regexp_replace('abc','b','x') AS `REGEXP_REPLACE('abc','b','x')`
CREATE TABLE t1 AS SELECT REGEXP_REPLACE('abc','b','x')+0;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`REGEXP_REPLACE('abc','b','x')+0` double NOT NULL DEFAULT '0'
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE t1;
SELECT REGEXP_REPLACE(NULL,'b','c');
REGEXP_REPLACE(NULL,'b','c')
NULL
SELECT REGEXP_REPLACE('a',NULL,'c');
REGEXP_REPLACE('a',NULL,'c')
NULL
SELECT REGEXP_REPLACE('a','b',NULL);
REGEXP_REPLACE('a','b',NULL)
NULL
SELECT REGEXP_REPLACE('a','x','b');
REGEXP_REPLACE('a','x','b')
a
SELECT REGEXP_REPLACE('a','','b');
REGEXP_REPLACE('a','','b')
a
SELECT REGEXP_REPLACE('a5b ab a5b','(?<=a)5*(?=b)','x');
REGEXP_REPLACE('a5b ab a5b','(?<=a)5*(?=b)','x')
axb ab a5b
SELECT REGEXP_REPLACE('a5b a5b a5b','(?<=a)5*(?=b)','x');
REGEXP_REPLACE('a5b a5b a5b','(?<=a)5*(?=b)','x')
axb axb axb
SELECT REGEXP_REPLACE('A','a','b');
REGEXP_REPLACE('A','a','b')
b
SELECT REGEXP_REPLACE('a','A','b');
REGEXP_REPLACE('a','A','b')
b
SELECT REGEXP_REPLACE('A' COLLATE utf8_bin,'a','b');
REGEXP_REPLACE('A' COLLATE utf8_bin,'a','b')
A
SELECT REGEXP_REPLACE('a' COLLATE utf8_bin,'A','b');
REGEXP_REPLACE('a' COLLATE utf8_bin,'A','b')
a
SELECT REGEXP_REPLACE('James Bond', '(.*) (.*)', '\\2, \\1 \\2');
REGEXP_REPLACE('James Bond', '(.*) (.*)', '\\2, \\1 \\2')
Bond, James Bond
SELECT REGEXP_REPLACE('абвгд','в','ц');
REGEXP_REPLACE('абвгд','в','ц')
абцгд
SELECT REGEXP_REPLACE('г',0xB3,0xB4);
REGEXP_REPLACE('г',0xB3,0xB4)
д
SELECT REGEXP_REPLACE('aaaa','a','b');
REGEXP_REPLACE('aaaa','a','b')
bbbb
SELECT REGEXP_REPLACE('aaaa','(?<=.)a','b');
REGEXP_REPLACE('aaaa','(?<=.)a','b')
abbb
SELECT REGEXP_REPLACE('aaaa','a(?=.)','b');
REGEXP_REPLACE('aaaa','a(?=.)','b')
bbba
SELECT REGEXP_REPLACE('aaaa','(?<=.)a(?=.)','b');
REGEXP_REPLACE('aaaa','(?<=.)a(?=.)','b')
abba
SELECT REGEXP_REPLACE('a\nb','(*LF)(?m)^a$','c');
REGEXP_REPLACE('a\nb','(*LF)(?m)^a$','c')
c
b
SELECT REGEXP_REPLACE('a\nb','(*CR)(?m)^a$','c');
REGEXP_REPLACE('a\nb','(*CR)(?m)^a$','c')
a
b
SELECT REGEXP_REPLACE('a\nb','(*CRLF)(?m)^a$','c');
REGEXP_REPLACE('a\nb','(*CRLF)(?m)^a$','c')
a
b
SELECT REGEXP_REPLACE('a\nb','(*ANYCRLF)(?m)^a$','c');
REGEXP_REPLACE('a\nb','(*ANYCRLF)(?m)^a$','c')
c
b
SELECT REGEXP_REPLACE('a\rb','(*LF)(?m)^a$','c');
REGEXP_REPLACE('a\rb','(*LF)(?m)^a$','c')
a b
SELECT REGEXP_REPLACE('a\rb','(*CR)(?m)^a$','c');
REGEXP_REPLACE('a\rb','(*CR)(?m)^a$','c')
c b
SELECT REGEXP_REPLACE('a\rb','(*CRLF)(?m)^a$','c');
REGEXP_REPLACE('a\rb','(*CRLF)(?m)^a$','c')
a b
SELECT REGEXP_REPLACE('a\rb','(*ANYCRLF)(?m)^a$','c');
REGEXP_REPLACE('a\rb','(*ANYCRLF)(?m)^a$','c')
c b
SELECT REGEXP_REPLACE('a\r\nb','(*LF)(?m)^a$','c');
REGEXP_REPLACE('a\r\nb','(*LF)(?m)^a$','c')
a
b
SELECT REGEXP_REPLACE('a\r\nb','(*CR)(?m)^a$','c');
REGEXP_REPLACE('a\r\nb','(*CR)(?m)^a$','c')
c
b
SELECT REGEXP_REPLACE('a\r\nb','(*CRLF)(?m)^a$','c');
REGEXP_REPLACE('a\r\nb','(*CRLF)(?m)^a$','c')
c
b
SELECT REGEXP_REPLACE('a\r\nb','(*ANYCRLF)(?m)^a$','c');
REGEXP_REPLACE('a\r\nb','(*ANYCRLF)(?m)^a$','c')
c
b
SELECT REGEXP_REPLACE('aa','(a)\\g1','b');
REGEXP_REPLACE('aa','(a)\\g1','b')
b
SELECT REGEXP_REPLACE('aa bb','(a)\\g1 (b)\\g2','c');
REGEXP_REPLACE('aa bb','(a)\\g1 (b)\\g2','c')
c
SELECT REGEXP_REPLACE('aaaaa','a{1,3}','b');
REGEXP_REPLACE('aaaaa','a{1,3}','b')
bb
SELECT REGEXP_REPLACE('aaaaa','a{10,20}','b');
REGEXP_REPLACE('aaaaa','a{10,20}','b')
aaaaa
SELECT REGEXP_REPLACE('daabbd','a(?R)?b','c');
REGEXP_REPLACE('daabbd','a(?R)?b','c')
dcd
SELECT REGEXP_REPLACE('daabbd','aa(?R)?bb','c');
REGEXP_REPLACE('daabbd','aa(?R)?bb','c')
dcd
SELECT REGEXP_REPLACE('dabccd','a(?>bc|b)c','e');
REGEXP_REPLACE('dabccd','a(?>bc|b)c','e')
ded
SELECT REGEXP_REPLACE('dabcd','a(?>bc|b)c','e');
REGEXP_REPLACE('dabcd','a(?>bc|b)c','e')
dabcd
SELECT REGEXP_REPLACE('ab','a(?!b)','e');
REGEXP_REPLACE('ab','a(?!b)','e')
ab
SELECT REGEXP_REPLACE('ac','a(?!b)','e');
REGEXP_REPLACE('ac','a(?!b)','e')
ec
SELECT REGEXP_REPLACE('ab','a(?=b)','e');
REGEXP_REPLACE('ab','a(?=b)','e')
eb
SELECT REGEXP_REPLACE('ac','a(?=b)','e');
REGEXP_REPLACE('ac','a(?=b)','e')
ac
SELECT REGEXP_REPLACE('ab','(?<!a)b','e');
REGEXP_REPLACE('ab','(?<!a)b','e')
ab
SELECT REGEXP_REPLACE('cb','(?<!a)b','e');
REGEXP_REPLACE('cb','(?<!a)b','e')
ce
SELECT REGEXP_REPLACE('ab','(?<=a)b','e');
REGEXP_REPLACE('ab','(?<=a)b','e')
ae
SELECT REGEXP_REPLACE('cb','(?<=a)b','e');
REGEXP_REPLACE('cb','(?<=a)b','e')
cb
SELECT REGEXP_REPLACE('aa','(?P<pattern>a)(?P=pattern)','b');
REGEXP_REPLACE('aa','(?P<pattern>a)(?P=pattern)','b')
b
SELECT REGEXP_REPLACE('aba','(?P<pattern>a)b(?P=pattern)','c');
REGEXP_REPLACE('aba','(?P<pattern>a)b(?P=pattern)','c')
c
SELECT REGEXP_REPLACE('a','a(?#comment)','e');
REGEXP_REPLACE('a','a(?#comment)','e')
e
SELECT REGEXP_REPLACE('aa','a(?#comment)a','e');
REGEXP_REPLACE('aa','a(?#comment)a','e')
e
SELECT REGEXP_REPLACE('aba','a(?#b)a','e');
REGEXP_REPLACE('aba','a(?#b)a','e')
aba
SELECT REGEXP_REPLACE('ddd<ab>cc</ab>eee','<.+?>','*');
REGEXP_REPLACE('ddd<ab>cc</ab>eee','<.+?>','*')
ddd*cc*eee
SELECT REGEXP_REPLACE('aaa','\\W\\W\\W','e');
REGEXP_REPLACE('aaa','\\W\\W\\W','e')
aaa
SELECT REGEXP_REPLACE('aaa','\\w\\w\\w','e');
REGEXP_REPLACE('aaa','\\w\\w\\w','e')
e
SELECT REGEXP_REPLACE('%','\\W','e');
REGEXP_REPLACE('%','\\W','e')
e
SELECT REGEXP_REPLACE('%a$','\\W.\\W','e');
REGEXP_REPLACE('%a$','\\W.\\W','e')
e
SELECT REGEXP_REPLACE('%a$','\\W\\w\\W','e');
REGEXP_REPLACE('%a$','\\W\\w\\W','e')
e
SELECT REGEXP_REPLACE('123','\\d\\d\\d\\d\\d\\d','e');
REGEXP_REPLACE('123','\\d\\d\\d\\d\\d\\d','e')
123
SELECT REGEXP_REPLACE('123','\\d\\d\\d','e');
REGEXP_REPLACE('123','\\d\\d\\d','e')
e
SELECT REGEXP_REPLACE('aaa','\\d\\d\\d','e');
REGEXP_REPLACE('aaa','\\d\\d\\d','e')
aaa
SELECT REGEXP_REPLACE('1a3','\\d.\\d\\d.\\d','e');
REGEXP_REPLACE('1a3','\\d.\\d\\d.\\d','e')
1a3
SELECT REGEXP_REPLACE('1a3','\\d.\\d','e');
REGEXP_REPLACE('1a3','\\d.\\d','e')
e
SELECT REGEXP_REPLACE('a1b','\\d.\\d','e');
REGEXP_REPLACE('a1b','\\d.\\d','e')
a1b
SELECT REGEXP_REPLACE('8','\\D','e');
REGEXP_REPLACE('8','\\D','e')
8
SELECT REGEXP_REPLACE('a','\\D','e');
REGEXP_REPLACE('a','\\D','e')
e
SELECT REGEXP_REPLACE('%','\\D','e');
REGEXP_REPLACE('%','\\D','e')
e
SELECT REGEXP_REPLACE('a1','\\D\\d','e');
REGEXP_REPLACE('a1','\\D\\d','e')
e
SELECT REGEXP_REPLACE('a1','\\d\\D','e');
REGEXP_REPLACE('a1','\\d\\D','e')
a1
SELECT REGEXP_REPLACE('\t','\\s','e');
REGEXP_REPLACE('\t','\\s','e')
e
SELECT REGEXP_REPLACE('\r','\\s','e');
REGEXP_REPLACE('\r','\\s','e')
e
SELECT REGEXP_REPLACE('\n','\\s','e');
REGEXP_REPLACE('\n','\\s','e')
e
SELECT REGEXP_REPLACE('a','\\S','e');
REGEXP_REPLACE('a','\\S','e')
e
SELECT REGEXP_REPLACE('1','\\S','e');
REGEXP_REPLACE('1','\\S','e')
e
SELECT REGEXP_REPLACE('!','\\S','e');
REGEXP_REPLACE('!','\\S','e')
e
SELECT REGEXP_REPLACE('.','\\S','e');
REGEXP_REPLACE('.','\\S','e')
e
#
# Checking REGEXP_INSTR
#
SELECT REGEXP_INSTR('abcd','X');
REGEXP_INSTR('abcd','X')
0
SELECT REGEXP_INSTR('abcd','a');
REGEXP_INSTR('abcd','a')
1
SELECT REGEXP_INSTR('abcd','b');
REGEXP_INSTR('abcd','b')
2
SELECT REGEXP_INSTR('abcd','c');
REGEXP_INSTR('abcd','c')
3
SELECT REGEXP_INSTR('abcd','d');
REGEXP_INSTR('abcd','d')
4
SELECT REGEXP_INSTR('aaaa','(?<=a)a');
REGEXP_INSTR('aaaa','(?<=a)a')
2
SELECT REGEXP_INSTR('вася','в');
REGEXP_INSTR('вася','в')
1
SELECT REGEXP_INSTR('вася','а');
REGEXP_INSTR('вася','а')
2
SELECT REGEXP_INSTR('вася','с');
REGEXP_INSTR('вася','с')
3
SELECT REGEXP_INSTR('вася','я');
REGEXP_INSTR('вася','я')
4
SELECT REGEXP_INSTR(CONVERT('вася' USING koi8r), CONVERT('в' USING koi8r));
REGEXP_INSTR(CONVERT('вася' USING koi8r), CONVERT('в' USING koi8r))
1
SELECT REGEXP_INSTR(CONVERT('вася' USING koi8r), CONVERT('а' USING koi8r));
REGEXP_INSTR(CONVERT('вася' USING koi8r), CONVERT('а' USING koi8r))
2
SELECT REGEXP_INSTR(CONVERT('вася' USING koi8r), CONVERT('с' USING koi8r));
REGEXP_INSTR(CONVERT('вася' USING koi8r), CONVERT('с' USING koi8r))
3
SELECT REGEXP_INSTR(CONVERT('вася' USING koi8r), CONVERT('я' USING koi8r));
REGEXP_INSTR(CONVERT('вася' USING koi8r), CONVERT('я' USING koi8r))
4
#
# Checking REGEXP_SUBSTR
#
CREATE TABLE t1 AS SELECT REGEXP_SUBSTR('abc','b');
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`REGEXP_SUBSTR('abc','b')` varchar(3) CHARACTER SET utf8 NOT NULL DEFAULT ''
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE t1;
EXPLAIN EXTENDED SELECT REGEXP_SUBSTR('abc','b');
id select_type table type possible_keys key key_len ref rows filtered Extra
1 SIMPLE NULL NULL NULL NULL NULL NULL NULL NULL No tables used
Warnings:
Note 1003 select regexp_substr('abc','b') AS `REGEXP_SUBSTR('abc','b')`
CREATE TABLE t1 AS SELECT REGEXP_SUBSTR('abc','b')+0;
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (
`REGEXP_SUBSTR('abc','b')+0` double NOT NULL DEFAULT '0'
) ENGINE=MyISAM DEFAULT CHARSET=latin1
DROP TABLE t1;
SELECT REGEXP_SUBSTR('See https://mariadb.org/en/foundation/ for details', 'https?://[^/]*');
REGEXP_SUBSTR('See https://mariadb.org/en/foundation/ for details', 'https?://[^/]*')
https://mariadb.org
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