regexp_count
Count the number of non-overlapping occurrences of a regular expression pattern in a string.
Example: regexp_count('abacad', 'a|b')
Output: 4
regexp_like
Returns true if the string matches the regular expression pattern.
Example: regexp_like('cat dog house', 'dog')
Output: true
regexp_replace
Replace the first regular expression match in a string.
Example: regexp_replace('alphabet', '[ae]', 'DOG')
Output: DOGlphabet