Stored Procedure Supporting Autonomous Transaction

-- Create a table.
CREATE TABLE test1 (a int, b text);
-- Create a stored procedure that contains an autonomous transaction.
CREATE OR REPLACE PROCEDURE autonomous_easy_1(i int)
AS
DECLARE
    PRAGMA AUTONOMOUS_TRANSACTION;
BEGIN
    START TRANSACTION;
    INSERT INTO test1 VALUES (2, 'a');
    IF i % 2 = 0 THEN
        COMMIT;
    ELSE
        ROLLBACK;
    END IF;
END;
/
-- Run a stored procedure.
select autonomous_easy_1(1);
-- View table data.
select * from test1;
-- Execution result:
 a | b
---+---
(0 rows)

-- Run a stored procedure.
select autonomous_easy_1(2);
-- View table data.
select * from test1;
-- Execution result:
 a | b
---+---
 2 | a
(1 row)

-- Truncate table data.
truncate table test1;
-- Execute a stored procedure that contains an autonomous transaction in a transaction block that is rolled back.
begin;
insert into test1 values(1,'b');
select autonomous_easy_2(2);
rollback;

-- View table data.
select * from test1;
-- Execution result:
 a | b
---+---
 2 | a
(1 row)