Thread: Understanding setof

I'm having trouble with setof returning functions

Let's say I have function x() returning setof integers.  I want to do
SELECT x(), but only keep the values which meet a criteria.  Something
like: SELECT x() as xval WHERE xval = 10.

How can I do that?

In general, is there a way to "unroll" a setof into a regular query?

On 04/04/2014 20:42, Robert James wrote:
> I'm having trouble with setof returning functions
>
> Let's say I have function x() returning setof integers.  I want to do
> SELECT x(), but only keep the values which meet a criteria.  Something
> like: SELECT x() as xval WHERE xval = 10.
>
> How can I do that?
>
> In general, is there a way to "unroll" a setof into a regular query?

if you mean that you want just a normal set of rows from the function, I
think you just do this:

  select * from x() s(t) where t = 10;

Ray.


--
Raymond O'Donnell :: Galway :: Ireland
rod@iol.ie