How can I pass an “array” of values to my stored procedure?

CREATE TYPE test as (
    n int4,
    m int4
);

select ARRAY[
    row(1,2)::test,
    row(3,4)::test,
    row(5,6)::test
];

CREATE OR REPLACE FUNCTION test_test(IN work_array test[]) RETURNS INT4 as $$
DECLARE
    i      INT4;
    result INT4 := 0;
BEGIN
    FOR i IN SELECT generate_subscripts( work_array, 1 ) LOOP
        result := result + work_array[i].n * work_array[i].m;
    END LOOP;
    RETURN result;
END;
$$ language plpgsql;

# SELECT test_test(
    ARRAY[
        row(1, 2)::test,
        row(3,4)::test,
        row(5,6)::test
    ]
);
 test_test
-----------
        44
(1 row)

DECLARE @i INT
DECLARE @Item NVARCHAR(4000)

SET @tempItemList = REPLACE (@tempItemList, ' ', '')
SET @i = CHARINDEX(@delimiter, @tempItemList)

WHILE (LEN(@tempItemList) > 0)
BEGIN
	IF @i = 0
		SET @Item = @tempItemList
	ELSE
		SET @Item = LEFT(@tempItemList, @i - 1)
	INSERT INTO @IDTable(Item) VALUES(@Item)
	IF @i = 0
		SET @tempItemList = ''
	ELSE
		SET @tempItemList = RIGHT(@tempItemList, LEN(@tempItemList) - @i)
	SET @i = CHARINDEX(@delimiter, @tempItemList)
END
RETURN

CREATE OR REPLACE FUNCTION fnExplode(in_array anyarray) RETURNS SETOF ANYELEMENT AS
$$
    SELECT ($1)[s] FROM generate_series(1,array_upper($1, 1)) AS s;
$$
LANGUAGE SQL IMMUTABLE;

SET v_remainder = v_id_arr;
SET v_cur_position = 1;

WHILE CHAR_LENGTH(v_remainder) > 0 AND v_cur_position > 0 DO
    SET v_cur_position = INSTR(v_remainder, '|');
    IF v_cur_position = 0 THEN
        SET v_cur_string = v_remainder;
    ELSE
        SET v_cur_string = LEFT(v_remainder, v_cur_position - 1);
    END IF;

    IF TRIM(v_cur_string) != '' THEN
        INSERT INTO tmp_test
            (id)
        VALUES
            (v_cur_string);
    END IF;

    SET v_remainder = SUBSTRING(v_remainder, v_cur_position + 1);
END WHILE;

SELECT
    id
FROM
tmp_test;

DROP TEMPORARY TABLE tmp_test;