On 7/18/06, Curtis Scheer <Curtis@daycos.com> wrote:
> Does anyone have any examples of how I would make a stored procedure in
> plpgsql that would allow for passing a list or arrays of values to be used
> in an sql IN clause? Like so: select * from table where field1 in (values).
>
Here's a very simple example. However, I think passing arrays of INTs
around is dirty. I wasn't able to do this without a FOR ...IN EXECUTE
statement.
CREATE TABLE ids
( id INTEGER , PRIMARY KEY (id)
);
INSERT INTO ids VALUES (1);
INSERT INTO ids VALUES (2);
INSERT INTO ids VALUES (3);
CREATE OR REPLACE FUNCTION example_array_input(INT[]) RETURNS SETOF ids AS
$BODY$
DECLARE in_clause ALIAS FOR $1; clause TEXT; rec RECORD;
BEGIN -- conver the array to a text string and make it LOOK like an
IN statement clause := in_clause; clause := trim(leading '{' FROM clause); clause := trim(trailing
'}'FROM clause);
FOR rec IN EXECUTE 'SELECT id FROM ids WHERE id IN (' || clause || ');' LOOP RETURN NEXT
rec; END LOOP; -- final return RETURN;
END
$BODY$ language plpgsql;
SELECT * FROM example_array_input('{1,2,4,5,6}'::INT[]);