PostgreSQL Error 22014: Invalid Argument for NTILE Function PostgreSQL error code 22014 is raised when the NTILE(n) window function receives an invalid argument — specifically when n is NULL , 0 , or a negative integer. The NTILE(n) function divides a result set into n ranked buckets, so any value that doesn't represent a positive integer makes the operation logically impossible. This error is most commonly encountered in dynamic queries, parameterized functions, or when user-supplied values are