How to determine if NULL is contained in an array in Postgres?

Question

How do I determine if NULL is contained in an array in Postgres? Currently using Postgres 9.3.3.

If I test with the following select it returns contains_null =

Answer 1

i didn't want to use unnest either, so i used a comparison of array_length using array_remove to solve a similar problem. Tested on 9.4.1, but should work in 9.3.3.

SELECT
ARRAY_LENGTH(ARRAY[1,null], 1) > ARRAY_LENGTH(ARRAY_REMOVE(ARRAY[1,null], NULL), 1) 
OR ARRAY_LENGTH(ARRAY_REMOVE(ARRAY[1,null], NULL), 1) IS NULL
---------
t