-414 A LIKE PREDICATE IS INVALID BECAUSE THE FIRST OPERAND IS NOT A STRING

Explanation
  The data type of
the first operand of the LIKE predicate must be a character string,
graphic string, or binary string.

System action
  The statement cannot be processed.

Programmer response
  Specify the predicate
so that the data type of each operand is a character string or a graphic
string.

SQLSTATE
  42824