Thread: PL/pgsql: function passing argument to IN operator

Hello list,  I'm trying to write a function that uses one of its arguments as
an input to an IN operator in a WHERE clause. I.e., something like:

-- ids are actually integers
CREATE FUNCTION foo(ids SOMETYPE) RETURNS [whatever] AS $$
BEGIN  SELECT id, [other stuff] FROM table WHERE [other conditions] AND
id IN (ids);  RETURN;
END
$$ plpgsql

I had wanted to avoid using the EXECUTE statement and dynamically
creating the query string, because 1) I'd rather not recompile the
query each time and 2) I'm doing a SELECT INTO, which apparently
doesn't work with EXECUTE.

Can anyone help me out?

Thanks,
Daniel

P.S.: Sorry if capitalizing SQL keywords is bad list etiquette...

Hello

it has sense only for array type

so you can try:
create replace function foo(anyarray)
returns bool as $$
begin return (select 1 = any($1));
end ; $$ language plpgsql;


postgres=# select foo(array[1,2,3]);foo
-----t
(1 row)

postgres=# select foo(array[2,3]);foo
-----f
(1 row)

Regards
Pavel Stehule

On 29/12/2007, Daniel Myers <danielsmyers@gmail.com> wrote:
> Hello list,
>    I'm trying to write a function that uses one of its arguments as
> an input to an IN operator in a WHERE clause. I.e., something like:
>
> -- ids are actually integers
> CREATE FUNCTION foo(ids SOMETYPE) RETURNS [whatever] AS $$
> BEGIN
>    SELECT id, [other stuff] FROM table WHERE [other conditions] AND
> id IN (ids);
>    RETURN;
> END
> $$ plpgsql
>
> I had wanted to avoid using the EXECUTE statement and dynamically
> creating the query string, because 1) I'd rather not recompile the
> query each time and 2) I'm doing a SELECT INTO, which apparently
> doesn't work with EXECUTE.
>
> Can anyone help me out?
>
> Thanks,
> Daniel
>
> P.S.: Sorry if capitalizing SQL keywords is bad list etiquette...
>
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