INOUT

PostgreSQL

Example

CREATE FUNCTION add_one(INOUT x integer) AS
$$
BEGIN
  x := x + 1;
END;
$$ LANGUAGE plpgsql;
SELECT add_one(5);

Output

 add_one
---------
       6
(1 row)

Explanation

In the example, a function called add_one is created with an INOUT parameter x. The function increases x by 1 each time it is called. When the function is called with 5 as the input, the function returns 6. This is what the Output represents.

Oracle

Example

CREATE OR REPLACE PROCEDURE sample_inout (param1 IN OUT VARCHAR2) AS
BEGIN
param1 := 'Output: ' || param1;
END;
/

DECLARE
param_val VARCHAR2(50) := 'Sample Parameter';
BEGIN
sample_inout(param_val);
DBMS_OUTPUT.PUT_LINE(param_val);
END;
/

Output

Output: Sample Parameter

Explanation

The example presents a stored procedure sample_inout in Oracle. The procedure accepts an IN OUT parameter, concatenates it with the string ‘Output: ’, and outputs the final value. Upon executing the anonymous block, the given parameter is passed and modified inside the procedure. The output will be ‘Output: Sample Parameter’.