Redshift Stored Procedure Can't Work as Expected - amazon-web-services

Question

I created and ran successfully Stored Procedure in Redshift but not working as expected.
For example, I'd like to delete data in the period set by the arguments.
-- Stored Procedure
CREATE OR REPLACE PROCEDURE sp_test(parm0 varchar(100), parm1 date, parm2 date)
AS '
BEGIN
EXECUTE
$_$ DELETE FROM test_table_b
WHERE $_$|| parm0 ||$_$
between $_$|| parm1 ||$_$ and $_$|| parm2 ||$_$ $_$;
end;
' language plpgsql;
-- Run Stored procedure
Begin;
Call sp_test('opsdt', '2021-01-16', '2021-01-17');
Commit;
-- Result
BEGIN executed successfully
Execution time: 0.07s
Statement 1 of 3 finished
0 rows affected
Call executed successfully
Execution time: 0.18s
Statement 2 of 3 finished
COMMIT executed successfully
Execution time: 0.13s
Statement 3 of 3 finished
Script execution finished
Total script execution time: 0.38s
Script ran successfully, but the record '2021-01-16' and '2021-01-17' is still remained in that table.
Any advice would be appreciated. Thanks in advance.

Answer 1

Thanks to #John Rotenstein, now I could run Stored Procedure as expected.
Just simple example for someone who has the same issue.
-- Revised Procedure
CREATE OR REPLACE PROCEDURE sp_del_test(tbl_name varchar(50), col_name varchar(50), start_dt date, end_dt date)
AS $PROC$
DECLARE
sql VARCHAR(MAX) := '';
BEGIN
sql := 'DELETE FROM ' || tbl_name || ' WHERE ' || col_name || ' BETWEEN ''' || start_dt || ''' AND ''' || end_dt || '''';
RAISE INFO '%', sql;
EXECUTE sql;
END;
$PROC$ language plpgsql;
-- Executed Commands
Begin;
Call sp_del_test('test_table_b', 'opsdt', '2021-01-23', '2021-01-24');
Commit;
-- Return Message
BEGIN executed successfully
Execution time: 0.05s
Statement 1 of 3 finished
**Warnings:
DELETE FROM test_table_b WHERE opsdt BETWEEN '2021-01-23' AND '2021-01-24'**
0 rows affected
Call executed successfully
Execution time: 0.2s
Statement 2 of 3 finished
COMMIT executed successfully
Execution time: 0.12s
Statement 3 of 3 finished
Script execution finished
Total script execution time: 0.38s