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Version: Candidate-3.4

regexp_split

Split string str by regexp expression pattern, return maximum max_split elements in ARRAY<VARCHAR> type.

Syntax​

regexp_split(str, pattern[, max_split])

Parameters​

str: required, the string to split, which must evaluate to a VARCHAR value.

pattern: required, the regexp expression pattern used to split, which must evaluate to a VARCHAR value.

max_split: optional, the number of maximum elements in the output value, which must evaluate to an INT value.

Return value​

Returns an ARRAY<VARCHAR> value.

Examples​

mysql> select regexp_split('StarRocks', '');
+---------------------------------------+
| regexp_split('StarRocks', '')         |
+---------------------------------------+
| ["S","t","a","r","R","o","c","k","s"] |
+---------------------------------------+

mysql> select regexp_split('StarRocks', '[SR]');
+-----------------------------------+
| regexp_split('StarRocks', '[SR]') |
+-----------------------------------+
| ["","tar","ocks"]                 |
+-----------------------------------+

mysql> select regexp_split('StarRocks', '[SR]', 1);
+--------------------------------------+
| regexp_split('StarRocks', '[SR]', 1) |
+--------------------------------------+
| ["StarRocks"]                        |
+--------------------------------------+

mysql> select regexp_split('StarRocks', '[SR]', 2);
+--------------------------------------+
| regexp_split('StarRocks', '[SR]', 1) |
+--------------------------------------+
| ["","tarRocks"]                      |
+--------------------------------------+