I'm trying to write a SQL statement to determine whether a value is an
an array, but I want the comparison to be done using IS NOT DISTINCT
FROM rather than =.
My first thought was that instead of writing:
SELECT value = ANY(array)
...I could simply write:
SELECT value IS NOT DISTINCT FROM ANY(array)
That doesn't seem to work, because IS NOT DISTINCT FROM is not an
operator. So then I tried creating an operator === (anyelement,
anyelement) that just does IS NOT DISTINCT FROM and writing:
select 1 === any(array[1]);
which got me:
ERROR: could not find array type for data type anyelement
Grr... any suggestions?
...Robert
