Oracle 11g - Merge PL/SQL issue - Same code work in Oracle10g

Question

Below PL/SQL block stop working after Oracle11g upgrade, working fine in Oracle10g
CREATE TABLE TMP_TABLE1 (P_PROVIDER NUMBER, P_ID NUMBER);
CREATE TABLE TMP_TABLE2 (COL1 NUMBER, COL2 NUMBER);
CREATE TABLE TMP_TABLE3 (COL3 NUMBER, COL4 NUMBER);
BEGIN
FOR i IN (SELECT p_provider p_provider, p_id p_id FROM tmp_table1)
LOOP
MERGE INTO TMP_TABLE2 T
USING ( SELECT I.P_PROVIDER P_PROVIDER,
I.P_ID P_ID FROM DUAL) DDD
ON (T.COL1= DDD.P_PROVIDER AND T.COL2 = DDD.P_ID)
WHEN NOT MATCHED THEN
INSERT (COL1, COL2) VALUES (1, (SELECT x.COL4 FROM TMP_TABLE3 x WHERE x.COL4 = DDD.P_ID));
END LOOP;
END;
Oracle 10g Version:
Oracle Database 10g Enterprise Edition Release 10.2.0.4.0 - 64bi
PL/SQL Release 10.2.0.4.0 - Production
CORE 10.2.0.4.0 Production
TNS for Solaris: Version 10.2.0.4.0 - Production
NLSRTL Version 10.2.0.4.0 - Production
Oracle 11g Version:
Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production
PL/SQL Release 11.2.0.2.0 - Production
CORE 11.2.0.2.0 Production
TNS for Linux: Version 11.2.0.2.0 - Production
NLSRTL Version 11.2.0.2.0 – Production
Oracle11 g Error:
Error at line 5
ORA-06550: line 11, column 93:
PL/SQL: ORA-00904: "DDD"."P_ID": invalid identifier
ORA-06550: line 5, column 7:
PL/SQL: SQL Statement ignored
Script Terminated on line 5.
Is there any patch/work around in Oracle 11g?
Please advice
Thank you
Raj

Answer 1

We had a similar issue when our organization upgraded to 11gR2.
It looks like it boils down to a change Oracle made in regards to how it works with correlated subqueries within an insert statement.
Anyway, this thread has a little more information:
Merge Command in 10g vs 11g
And it says to look at Metalink note 1109983.1 (which I can't seem to find).
Anyway, a workaround in thread is suggests (which worked for us) to wrap the insert subquery around a dummy decode clause, and oddly it will work.
eg:
INSERT (COL1, COL2) VALUES (1, (decode(1,1,(SELECT x.COL4 FROM TMP_TABLE3 x WHERE x.COL4 = DDD.P_ID)) ) ) ;
Quite a kludge, but at least it is an immediate fix to the problem, without having to rewrite anything.