CREATE OR ALTER PROCEDURE SOME_PROC
AS
-- Declaring a variable of the INT type
DECLARE I INT;
-- Declaring a variable of the INT type that does not allow NULL
DECLARE VARIABLE J INT NOT NULL;
-- Declaring a variable of the INT type with the default value of 0
DECLARE VARIABLE K INT DEFAULT 0;
-- Declaring a variable of the INT type with the default value of 1
DECLARE VARIABLE L INT = 1;
-- Declaring a variable based on the COUNTRYNAME domain
DECLARE FARM_COUNTRY COUNTRYNAME;
-- Declaring a variable of the type equal to the COUNTRYNAME domain
DECLARE FROM_COUNTRY TYPE OF COUNTRYNAME;
-- Declaring a variable with the type of the CAPITAL column in the COUNTRY table
DECLARE CAPITAL TYPE OF COLUMN COUNTRY.CAPITAL;
BEGIN
/* PSQL statements */
END