Pattern-matching conditions - AWS Clean Rooms

Pattern-matching conditions

A pattern-matching operator searches a string for a pattern specified in the conditional expression and returns true or false depending on whether it finds a match. AWS Clean Rooms uses the following methods for pattern matching:

  • LIKE expressions

    The LIKE operator compares a string expression, such as a column name, with a pattern that uses the wildcard characters % (percent) and _ (underscore). LIKE pattern matching always covers the entire string. LIKE performs a case-sensitive match and ILIKE performs a case-insensitive match.

  • SIMILAR TO regular expressions

    The SIMILAR TO operator matches a string expression with a SQL standard regular expression pattern, which can include a set of pattern-matching metacharacters that includes the two supported by the LIKE operator. SIMILAR TO matches the entire string and performs a case-sensitive match.

Topics