Re: [SQL] How to pass array of values to a stored procedure

[Tony Wasson]

On 7/18/06, Curtis Scheer <[EMAIL PROTECTED]> 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[]);

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