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

Question

I want to be able to pass an \"array\" of values to my stored procedure, instead of calling \"Add value\" procedure serially.

Can anyone suggest a way to do it? am I

Answer 1

For PostgreSQL, you could do something like this:

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;

Then, you could pass a delimited string to your stored procedure.

Say, param1 was an input param containing '1|2|3|4|5'

The statement:

SELECT CAST(fnExplode(string_to_array(param1, '|')) AS INTEGER);

results in a result set that can be joined or inserted.

Likewise, for MySQL, you could do something like this:

DELIMITER $$
CREATE PROCEDURE `spTest_Array`
(
    v_id_arr TEXT
)
BEGIN
    DECLARE v_cur_position INT; 
    DECLARE v_remainder TEXT; 
    DECLARE v_cur_string VARCHAR(255); 
    CREATE TEMPORARY TABLE tmp_test
    ( 
        id INT
    ) ENGINE=MEMORY; 

    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;
END 
$$

Then simply CALL spTest_Array('1|2|3|4|5') should produce the same result set as the above PostgreSQL query.