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​
A number data type value.
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 |
+------------------------------------------------+