str_to_map

Description

Splits a given string into key-value pairs using two delimiters and returns a map of the split pairs.

This function is supported from v3.1 onwards.

Syntax

MAP<VARCHAR, VARCHAR> str_to_map(VARCHAR content[, VARCHAR delimiter[, VARCHAR map_delimiter]])

Parameters

• content: required, the string expression to split.
• delimiter: optional, the delimiter used to split content into key-value pairs, defaults to ,.
• map_delimiter: optional, the delimiter used to separate each key-value pair, defaults to :.

Return value

Returns a MAP of STRING elements. Any null input results in NULL.

Examples

mysql> SELECT str_to_map('a:1|b:2|c:3', '|', ':') as map;
+---------------------------+
| map                       |
+---------------------------+
| {"a":"1","b":"2","c":"3"} |
+---------------------------+

mysql> SELECT str_to_map('a:1;b:2;c:3', ';', ':') as map;
+---------------------------+
| map                       |
+---------------------------+
| {"a":"1","b":"2","c":"3"} |
+---------------------------+

mysql> SELECT str_to_map('a:1,b:2,c:3', ',', ':') as map;
+---------------------------+
| map                       |
+---------------------------+
| {"a":"1","b":"2","c":"3"} |
+---------------------------+

mysql> SELECT str_to_map('a') as map;
+------------+
| map        |
+------------+
| {"a":null} |
+------------+

mysql> SELECT str_to_map('a:1,b:2,c:3',null, ':') as map;
+------+
| map  |
+------+
| NULL |
+------+

mysql> SELECT str_to_map('a:1,b:2,c:null') as map;
+------------------------------+
| map                          |
+------------------------------+
| {"a":"1","b":"2","c":"null"} |
+------------------------------+

keywords

STR_TO_MAP