Re:

Matthew Peter wrote:
> CREATE OR REPLACE FUNCTION getlist(text) RETURNS SETOF my_tbl as $$
> SELECT * FROM my_tbl
> WHERE u_id IN (0, $1);
>
> $$ LANGUAGE SQL;
>
> SELECT * from getlist('1,2,3');
> (0 rows)

You're executing SELECT * FROM my_tbl WHERE u_id IN (0, '1,2,3').
Apparently there are no values 0 or '1,2,3' for u_id in that table.

> I'm sure it's probably trival but I'm still learning how psql  :) Thanks

You can split the string into values with string_to_array(). You'll
still be comparing ints with strings though.

Without casting the resulting strings to ints you run the risk that the
database needs to cast the int u_id value to text for every record
encountered. For 'small' data sets this shouldn't be a problem.

I suppose this is a simplified example, or you wouldn't have a reason to
use an SP; you'd just SELECT * FROM my_tbl WHERE u_id IN (0,1,2,3)

--
Alban Hertroys
alban@magproductions.nl

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