(B)0matching-clause =

  qqq> value-expr qqqwqqqqq>qqqqwq> MATCHING qqq> match-expr qqqq>
                     mqq> NOT qqj

    With MATCHING, the condition is true if the match expression
    matches the value expression. MATCHING uses the following
    symbols:

    * Matches any string of zero or more characters

    % Matches any single character

                                   NOTE

       MATCHING is not case sensitive; it considers uppercase and
       lowercase forms of the same letter to be a match.

    If either of the expressions is null, the result is null.