Restrictions

gaussdb=# CREATE TABLE test_trigger_des_tbl(id1 int, id2 int, id3 int);
CREATE TABLE

gaussdb=# CREATE OR REPLACE FUNCTION tri_insert_func() RETURNS TRIGGER AS
$$
DECLARE
PRAGMA AUTONOMOUS_TRANSACTION;
BEGIN
INSERT INTO test_trigger_des_tbl VALUES(new.id1, new.id2, new.id3);
RETURN new;
END$$ LANGUAGE plpgsql;
ERROR:  Triggers do not support autonomous transactions
DETAIL:  N/A

gaussdb=# DROP TABLE test_trigger_des_tbl;
DROP TABLE

gaussdb=# CREATE TABLE t1(a INT ,b TEXT);
CREATE TABLE

gaussdb=# DECLARE 
--PRAGMA AUTONOMOUS_TRANSACTION;
BEGIN
DECLARE 
PRAGMA AUTONOMOUS_TRANSACTION;
BEGIN
DBE_OUTPUT.PRINT_LINE('JUST USE CALL.');
INSERT INTO t1 VALUES(1,'CAN YOU ROLLBACK!');
END;
INSERT INTO t1 VALUES(2,'I WILL ROLLBACK!');
ROLLBACK;
END;
/
JUST USE CALL.
ANONYMOUS BLOCK EXECUTE
gaussdb=# SELECT * FROM t1;
 a | b 
---+---
(0 rows)

gaussdb=# DROP TABLE t1;
DROP TABLE

-- Create a table.
gaussdb=# CREATE TABLE sections(section_id INT);
CREATE TABLE
gaussdb=# INSERT INTO sections VALUES(1);
INSERT 0 1
gaussdb=# INSERT INTO sections VALUES(1);
INSERT 0 1
gaussdb=# INSERT INTO sections VALUES(1);
INSERT 0 1
gaussdb=# INSERT INTO sections VALUES(1);
INSERT 0 1

1. The PROCEDURE OUT output parameter passes the ref cursor parameter (supported).

   gaussdb=# CREATE OR REPLACE PROCEDURE proc_sys_ref(OUT c1 REFCURSOR)
   IS
   DECLARE
     PRAGMA AUTONOMOUS_TRANSACTION;
   BEGIN
    OPEN c1 FOR SELECT section_id FROM sections ORDER BY section_id;
   
   END;
   /
   CREATE PROCEDURE
   
   gaussdb=# CREATE OR REPLACE PROCEDURE proc_sys_call() AS 
   DECLARE
     c1 SYS_REFCURSOR;
     temp NUMBER(4);
   BEGIN
     proc_sys_ref(c1);
     IF c1%ISOPEN THEN
       RAISE NOTICE '%','OK';
    END IF;
   
     LOOP
       FETCH c1 INTO temp;
       RAISE NOTICE '%',c1%ROWCOUNT;
       EXIT WHEN c1%NOTFOUND;
     END LOOP;
   END;
   /
   CREATE PROCEDURE
   
   gaussdb=# CALL proc_sys_call();
   NOTICE:  OK
   NOTICE:  1
   NOTICE:  2
   NOTICE:  3
   NOTICE:  4
   NOTICE:  4
    proc_sys_call 
   ---------------
   
   (1 row)
   gaussdb=# DROP PROCEDURE proc_sys_ref;
   DROP PROCEDURE 
   gaussdb=# DROP PROCEDURE proc_sys_call;
   DROP PROCEDURE 

2. The PROCEDURE IN or INOUT output parameter passes the ref cursor parameter (not supported).

   gaussdb=# CREATE OR REPLACE PROCEDURE proc_sys_ref(IN c1 REFCURSOR)
   IS
   DECLARE
     PRAGMA AUTONOMOUS_TRANSACTION;
     temp NUMBER(4);
   BEGIN
     IF c1%ISOPEN THEN
       RAISE NOTICE '%','OK';
     END IF;
   
     LOOP
       FETCH c1 INTO temp;
       RAISE NOTICE '%',c1%ROWCOUNT;
       EXIT WHEN c1%NOTFOUND;
     END LOOP;
   END;
   /
   CREATE PROCEDURE
   
   gaussdb=# CREATE OR REPLACE PROCEDURE proc_sys_call() AS 
   DECLARE
     c1 SYS_REFCURSOR;
     temp NUMBER(4);
   BEGIN
     OPEN c1 FOR SELECT section_id FROM sections ORDER BY section_id;
     proc_sys_ref(c1);
   END;
   /
   CREATE PROCEDURE
   
   gaussdb=# CALL proc_sys_call();
   ERROR:  Unsupported: ref_cursor parameter is not supported for autonomous transactions.
   CONTEXT:  SQL statement "CALL proc_sys_ref(c1)"
   PL/pgSQL function proc_sys_call() line 7 at PERFORM
   gaussdb=# DROP PROCEDURE proc_sys_ref;
   DROP PROCEDURE 

3. The FUNCTION RETURN output parameter passes the ref cursor parameter (not supported).

   gaussdb=# DROP PROCEDURE IF EXISTS proc_sys_ref;
   gaussdb=# CREATE OR REPLACE FUNCTION proc_sys_ref() RETURN SYS_REFCURSOR IS
   DECLARE
     PRAGMA AUTONOMOUS_TRANSACTION;
           c1 SYS_REFCURSOR;
   BEGIN
    OPEN c1 FOR SELECT section_id FROM sections ORDER BY section_id;
    return c1;
   END;
   /
   ERROR:  Autonomous function do not support ref cursor as return types or out, inout arguments.
   DETAIL:  N/A

4. The FUNCTION OUT output parameter passes the ref cursor parameter (not supported).

   gaussdb=# DROP FUNCTION IF EXISTS proc_sys_ref;
   gaussdb=# CREATE OR REPLACE FUNCTION proc_sys_ref(C1 out SYS_REFCURSOR)
   gaussdb-# return SYS_REFCURSOR
   gaussdb-# IS
   gaussdb$# declare
   gaussdb$#   PRAGMA AUTONOMOUS_TRANSACTION;
   gaussdb$# BEGIN
   gaussdb$#  OPEN C1 FOR SELECT section_ID FROM sections ORDER BY section_ID;
   gaussdb$#  return 1;
   gaussdb$# END;
   gaussdb$# /
   ERROR:  Autonomous function do not support ref cursor as return types or out, inout arguments.
   DETAIL:  N/A

5. On the client (such as gsql and JDBC), the autonomous transaction PROCEDURE with the output parameter ref cursor is directly called. (Not supported. In this case, cursor data cannot be read.)

   gaussdb=# CREATE OR REPLACE PROCEDURE proc_sys_ref(OUT c1 REFCURSOR)
   IS
   DECLARE
   PRAGMA AUTONOMOUS_TRANSACTION;
   BEGIN
   OPEN c1 FOR SELECT section_id FROM sections ORDER BY section_id;
   END;
   /
   CREATE PROCEDURE
   gaussdb=# begin;
   BEGIN
   gaussdb=# call proc_sys_ref(null);
            c1
   --------------------
    <unnamed portal 1>
   (1 row)
   
   gaussdb=# fetch "<unnamed portal 1>";
   ERROR:  cursor "<unnamed portal 1>" does not exist
   gaussdb=# end;
   ROLLBACK
   gaussdb=# DROP PROCEDURE proc_sys_ref;
   DROP PROCEDURE
   -- Drop the table.
   gaussdb=# DROP TABLE sections;
   DROP TABLE

gaussdb=# CREATE TABLE test_in (id INT,a DATE);
CREATE TABLE

gaussdb=# CREATE OR REPLACE FUNCTION autonomous_out()
RETURNS RECORD
LANGUAGE PLPGSQL AS $$
DECLARE PRAGMA AUTONOMOUS_TRANSACTION;
         r1 RECORD;
BEGIN
    DBE_OUTPUT.PRINT_LINE('THIS IS IN AUTONOMOUS_F_139_7');
    TRUNCATE test_in;
    INSERT INTO test_in VALUES (1,'1909-01-01');
    SELECT * INTO r1 FROM test_in;
RETURN r1;
END;
$$;
CREATE FUNCTION

gaussdb=# SELECT ok.id,ok.a FROM autonomous_out() AS ok(id INT,a DATE);
ERROR:  unrecognized return type for PLSQL function.

gaussdb=# CREATE TYPE rec IS (e1 INTEGER, e2 VARCHAR2);
CREATE TYPE
gaussdb=# CREATE OR REPLACE FUNCTION func(ele3 INOUT VARCHAR2) RETURN rec AS
i INTEGER;
ele1 rec;
PRAGMA AUTONOMOUS_TRANSACTION;
BEGIN
NULL;
RETURN ele1;
END;
/
CREATE FUNCTION

gaussdb=# CALL func(1);
 e1 | e2 
----+----
    | 
(1 row)

gaussdb=# DROP TABLE test_in;
DROP TABLE
gaussdb=# DROP FUNCTION autonomous_out;
DROP FUNCTION 
gaussdb=# DROP FUNCTION func;
DROP FUNCTION 

gaussdb=# CREATE OR REPLACE PROCEDURE auto_func(r INT)
AS
DECLARE
  a INT;
  PRAGMA AUTONOMOUS_TRANSACTION;
BEGIN
SET TRANSACTION ISOLATION LEVEL SERIALIZABLE;
 a:=r;
END;
/
CREATE PROCEDURE
gaussdb=# call auto_func(1);
ERROR:  ERROR:  SET TRANSACTION ISOLATION LEVEL must be called before any query
CONTEXT:  SQL statement "SET TRANSACTION ISOLATION LEVEL SERIALIZABLE"
PL/pgSQL function auto_func(integer) line 6 at SQL statement
referenced column: auto_func
gaussdb=# DROP FUNCTION auto_func;
DROP FUNCTION 

gaussdb=# CREATE TABLE test_in (id INT,a DATE);
CREATE TABLE
gaussdb=# CREATE TABLE test_main (id INT,a DATE);
CREATE TABLE
gaussdb=# INSERT INTO test_main VALUES (1111,'2021-01-01'),(2222,'2021-02-02');
INSERT 0 2
gaussdb=# TRUNCATE test_in,test_main;
TRUNCATE TABLE
gaussdb=# CREATE OR REPLACE FUNCTION autonomous_f_022(num1  INT) RETURNS SETOF test_in
LANGUAGE PLPGSQL AS $$
DECLARE
count INT :=3;
test_row test_in%ROWTYPE;
PRAGMA AUTONOMOUS_TRANSACTION;
BEGIN
    WHILE TRUE
    LOOP
    IF count=3 THEN
    NULL;
    ELSE 
    IF count=2 THEN
        INSERT INTO test_main VALUES (count,'2021-03-03');
        GOTO pos1;
    END IF;                
    END IF;
    count=count-1;
    END LOOP;
    INSERT INTO test_main VALUES (1000,'2021-04-04');
     <<pos1>>
     FOR test_row IN SELECT * FROM test_main
     LOOP
        RETURN NEXT test_row;
       END LOOP;
      RETURN;
END;
$$;
ERROR:  Autonomous transactions do not support RETURN SETOF.
DETAIL:  N/A

gaussdb=# DROP TABLE test_main;
DROP TABLE
gaussdb=# DROP TABLE test_in;
DROP TABLE