help using arrays in a function

Hello,

I have a rather simple function I’ve been using in 7.3.4

                                         version

-----------------------------------------------------------------------------------------

 PostgreSQL 7.3.4 on i686-pc-cygwin, compiled by GCC gcc (GCC) 3.2 20020927 (prerelease)

(1 row)

This compares an integer to all elements in an integer array and looks for a match

CREATE OR REPLACE FUNCTION public.array_element_compare(_int4, int4)

  RETURNS text AS

'

            DECLARE

                        a ALIAS FOR $1;

                        b ALIAS FOR $2;

                        i integer;

                        status text;

            BEGIN

                        i := 1;

                        status := ‘'false’';

                        WHILE a[i] LOOP

                                    IF a[i] = b THEN

                                                status := ‘'true’';

                                    END IF;

                                    i := i+1;

                        END LOOP;

            RETURN status;

            END;'

  LANGUAGE 'plpgsql';

It works find

germinate1.5 =# select array_element_compare('{100,92,82}', 82);

 array_element_compare

-----------------------

 true

(1 row)

germinate1.5 =# select array_element_compare('{100,92}', 82);

 array_element_compare

-----------------------

 false

(1 row)

I’m now testing our database on 7.4 and get an error with this function and I can’t figure out how to fix it.

                                       version

-------------------------------------------------------------------------------------

 PostgreSQL 7.4 on i686-pc-cygwin, compiled by GCC gcc (GCC) 3.3.1 (cygming special)

(1 row)

germinate1.5 =# select array_element_compare('{100, 92, 82}', 82);

ERROR:  invalid input syntax for type boolean: "100"

CONTEXT:  PL/pgSQL function "array_element_compare" line 9 at while

Can anyone point me in the right direction?

Thanks much for any help,

Jennifer