REGEXP_EXTRACT_ALL

Description

Regularly matches a string str and extracts the first sub-pattern matching part of pattern. The pattern needs to exactly match a part of str in order to return an array of strings for the part of the pattern that needs to be matched. If there is no match or the pattern has no sub-pattern, the empty string is returned.

• Character set matching requires the use of Unicode standard character classes. For example, to match Chinese, use \p{Han}.

Syntax

REGEXP_EXTRACT_ALL(<str>, <pattern>)

Parameters

Parameter	Description
<str>	The column need to do regular matching.
<pattern>	Target pattern.

Return value

Value after extraction. It is String type.

Example

mysql> SELECT regexp_extract_all('AbCdE', '([[:lower:]]+)C([[:lower:]]+)');
+--------------------------------------------------------------+
| regexp_extract_all('AbCdE', '([[:lower:]]+)C([[:lower:]]+)') |
+--------------------------------------------------------------+
| ['b']                                                        |
+--------------------------------------------------------------+

mysql> SELECT regexp_extract_all('AbCdEfCg', '([[:lower:]]+)C([[:lower:]]+)');
+-----------------------------------------------------------------+
| regexp_extract_all('AbCdEfCg', '([[:lower:]]+)C([[:lower:]]+)') |
+-----------------------------------------------------------------+
| ['b','f']                                                       |
+-----------------------------------------------------------------+

mysql> SELECT regexp_extract_all('abc=111, def=222, ghi=333','("[^"]+"|\\w+)=("[^"]+"|\\w+)');
+--------------------------------------------------------------------------------+
| regexp_extract_all('abc=111, def=222, ghi=333', '("[^"]+"|\w+)=("[^"]+"|\w+)') |
+--------------------------------------------------------------------------------+
| ['abc','def','ghi']                                                            |
+--------------------------------------------------------------------------------+

mysql> select regexp_extract_all('这是一段中文 This is a passage in English 1234567', '(\\p{Han}+)(.+)');
+------------------------------------------------------------------------------------------------+
| regexp_extract_all('这是一段中文 This is a passage in English 1234567', '(\p{Han}+)(.+)')       |
+------------------------------------------------------------------------------------------------+
| ['这是一段中文']                                                                               |
+------------------------------------------------------------------------------------------------+