Stored procedure in Redshift to load data into a table

Question

I have a sql query which fetches the data from 4 tables and I want to use this script to load data into another table in Redshift and I am trying to create a stored procedure but I keep getting errors. Below is my script.

CREATE or replace PROCEDURE ABC1 (SOURCE_SYS CHAR(3), FILE_NBR BIGINT)
AS
BEGIN
  INSERT INTO SP1 (SOURCE_SYS,FILE_NBR)
  VALUES(
    SELECT 'WT', PK_ORDERNO
    FROM table_1
    JOIN table_2 ON table_1.file_nbr = table_2.file_nbr
    LEFT OUTER JOIN table_3 ON table_2.file_nbr = table_3.file_nbr
  )
END;

Answer 1

You should do it this way:

CREATE OR REPLACE PROCEDURE ABC1 (SOURCE_SYS CHAR(3),FILE_NBR BIGINT)
AS $$
BEGIN


    INSERT INTO SP1 (SOURCE_SYS,FILE_NBR)

    SELECT 'WT',PK_ORDERNO FROM 
    table_1 join table_2 on table_1.file_nbr=table_2.file_nbr
    left outer join
    table_3 on table_2.file_nbr = table_3.file_nbr ;

END;
$$ LANGUAGE plpgsql;