REGEXP_LIKE

REGEXP_LIKE function is used to check that whether the string matches regular expression.

Syntax

REGEXP_LIKE(<expr>, <pat[, match_type]>)

Arguments

Arguments	Description
<expr>	The string expr that to be matched
<pat>	The regular expression
[match_type]	Optional. match_type argument is a string that specifying how to perform matching

match_type may contain any or all the following characters:

• c: Case-sensitive matching.
• i: Case-insensitive matching.
• m: Multiple-line mode. Recognize line terminators within the string. The default behavior is to match line terminators only at the start and end of the string expression.
• n: The . character matches line terminators. The default is for . matching to stop at the end of a line.
• u: Unix-only line endings. Not be supported now.

Return Type

BIGINT Returns 1 if the string expr matches the regular expression specified by the pattern pat, 0 otherwise. If expr or pat is NULL, the return value is NULL.

Examples

SELECT REGEXP_LIKE('a', '^[a-d]');
+----------------------------+
| REGEXP_LIKE('a', '^[a-d]') |
+----------------------------+
|                          1 |
+----------------------------+

SELECT REGEXP_LIKE('abc', 'ABC');
+---------------------------+
| REGEXP_LIKE('abc', 'ABC') |
+---------------------------+
|                         1 |
+---------------------------+

SELECT REGEXP_LIKE('abc', 'ABC', 'c');
+--------------------------------+
| REGEXP_LIKE('abc', 'ABC', 'c') |
+--------------------------------+
|                              0 |
+--------------------------------+

SELECT REGEXP_LIKE('new*\n*line', 'new\\*.\\*line');
+-------------------------------------------+
| REGEXP_LIKE('new*
*line', 'new\*.\*line') |
+-------------------------------------------+
|                                         0 |
+-------------------------------------------+

SELECT REGEXP_LIKE('new*\n*line', 'new\\*.\\*line', 'n');
+------------------------------------------------+
| REGEXP_LIKE('new*
*line', 'new\*.\*line', 'n') |
+------------------------------------------------+
|                                              1 |
+------------------------------------------------+