Re: ERROR: function expression in FROM may not refer to other relations of same query level

Joseph S <jks(at)selectacast(dot)net> writes:
> Supposed I have this table:

> create temp table tempa (ids int[]);
> insert into tempa SELECT ARRAY[1 , 2, 3];

> Now how do I get output from that?

Uh, you didn't actually say what output you're looking for, but
I'm going to guess it's this:

regression=# select unnest(ids) from tempa;
unnest
--------
1
2
3
(3 rows)

Pre-8.4, you need a version of unnest() that's coded in C or SQL;
plpgsql won't do.

regards, tom lane