regexp_match() function
Returns true if any part of a string matches the supplied regular expression.
Syntax
regexp_match(string,regex)
Arguments
string → is string. The string to test against the regular expression.
regex → is string. The regular expression to test against. Backslash characters must be double escaped (eg "\\s" to match a white space character). Non-greedy regular expressions are not supported.
Example
regexp_match('QGIS ROCKS','\\sROCKS') → 1