规格约束

gaussdb=# CREATE TABLE test_trigger_des_tbl(id1 int, id2 int, id3 int);
NOTICE:  The 'DISTRIBUTE BY' clause is not specified. Using 'id1' as the distribution column by default.
HINT:  Please use 'DISTRIBUTE BY' clause to specify suitable data distribution column.
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);
NOTICE:  The 'DISTRIBUTE BY' clause is not specified. Using 'a' as the distribution column by default.
HINT:  Please use 'DISTRIBUTE BY' clause to specify suitable data distribution column.
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

gaussdb=# create table sections(section_ID int);
gaussdb=# insert into sections values(1);
gaussdb=# insert into sections values(1);
gaussdb=# insert into sections values(1);
gaussdb=# insert into sections values(1);

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
gaussdb=# CREATE OR REPLACE function proc_sys_ref(OUT C2 SYS_REFCURSOR, OUT a int)
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

gaussdb=# CREATE OR REPLACE PROCEDURE autonomous_test_in_p_116(num1 INT ) 
IMMUTABLE 
AS
DECLARE
PRAGMA AUTONOMOUS_TRANSACTION;
BEGIN
PERFORM pg_sleep(1);
END;
/
ERROR:  Autonomous transactions do not support STABLE/IMMUTABLE.
DETAIL:  Please remove stable/immutable.

gaussdb=# CREATE OR REPLACE PROCEDURE autonomous_test_in_p_117(num1 INT ) STABLE AS
DECLARE
PRAGMA AUTONOMOUS_TRANSACTION;
BEGIN
PERFORM pg_sleep(1);
END;
/
ERROR:  Autonomous transactions do not support STABLE/IMMUTABLE.
DETAIL:  Please remove stable/immutable.

gaussdb=# CREATE TABLE test_lock (id INT,a DATE);
NOTICE:  The 'DISTRIBUTE BY' clause is not specified. Using 'id' as the distribution column by default.
HINT:  Please use 'DISTRIBUTE BY' clause to specify suitable data distribution column.
CREATE TABLE
gaussdb=# INSERT INTO test_lock VALUES (10,SYSDATE),(11,SYSDATE),(12,SYSDATE);
INSERT 0 3
gaussdb=# CREATE OR REPLACE FUNCTION autonomous_test_lock(num1 INT,num2 INT) RETURNS
INTEGER LANGUAGE plpgsql AS $$
DECLARE num3 INT := 4;
PRAGMA AUTONOMOUS_TRANSACTION;
BEGIN
UPDATE test_lock SET a=SYSDATE WHERE id =11;
RETURN num1+num2+num3;
END;
$$;
CREATE FUNCTION

gaussdb=# START TRANSACTION;
START TRANSACTION
gaussdb=# UPDATE test_lock SET a=SYSDATE WHERE id =11;
UPDATE 1
gaussdb=# CALL autonomous_test_lock(1,1);
ERROR:  ERROR:  Lock wait timeout: thread 139874535470848 on node datanode1 waiting for ShareLock on transaction 16214 after 120000.124 ms
DETAIL:  blocked by hold lock thread 139874577413888, statement <UPDATE test_lock SET a = "sysdate"() WHERE id =11;>, hold lockmode ExclusiveLock.
CONTEXT:  SQL statement "UPDATE test_lock SET a=SYSDATE WHERE id =11"
PL/SQL function autonomous_test_lock(integer,integer) line 5 at SQL statement
referenced column: autonomous_test_lock

gaussdb=# END;
ROLLBACK
gaussdb=# DROP TABLE test_lock;
DROP TABLE

gaussdb=# CREATE OR REPLACE FUNCTION auto_func() RETURN RECORD
AS
DECLARE
  TYPE rec_type IS RECORD(c1 INT, c2 INT);
  r rec_type;
  PRAGMA AUTONOMOUS_TRANSACTION;
BEGIN
  r.c1:=101;
  r.c2:=201;
  RETURN r;
END;
/
CREATE FUNCTION

gaussdb=# SELECT auto_func();
ERROR:  unrecognized return type for PLSQL function.
CONTEXT:  referenced column: auto_func

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 FUNCTION
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/SQL function auto_func(integer) line 6 at SQL statement
referenced column: auto_func

gaussdb=# CREATE OR REPLACE FUNCTION test_set() RETURN SETOF INT
AS
DECLARE
PRAGMA AUTONOMOUS_TRANSACTION;
BEGIN
    RETURN QUERY (SELECT unnest(ARRAY[ARRAY[1, 2], ARRAY[3, 4]]));
END;
/
ERROR:  Autonomous transactions do not support RETURN SETOF.
DETAIL:  N/A