Alvaro Herrera <alvherre(at)alvh(dot)no-ip(dot)org> writes:
> Determining that an array has a NULL element seems convoluted. I ended
> up with this query, where comparing the result of array_positions() with
> an empty array does that. If anybody knows of a simpler way, or any
> situations in which this fails, I'm all ears.
Maybe better to rethink why we allow elements of prattrs to be null?
regards, tom lane