Parallel hint as part of index not working

Hello,
I think that I am misusing the parallel hint on this one, and would appreciate some guidance. I have an insert statement as such:
INSERT INTO TABLE1
SELECT column1, column2
FROM table2;
I modified the query so that it has a parallel:
SELECT /*+ FULL(table2) PARALLEL(table2, 4) */
column1, column2
FROM table2;
This parallel helps with the query's speed. However, when I use it with the insert statement on the top, it does not insert any record, nor does it give an error message:
INSERT INTO TABLE1
SELECT /*+ FULL(table2) PARALLEL(table2, 4) */
column1, column2
FROM table2;
I put EXECUTE IMMEDIATE 'ALTER SESSION ENABLE PARALLEL DML'; at the beginning of the procedure, but that did not help.
I really need the parallel to be in the SELECT statement, that statement runs for about 3 hours without a parallel (due to large amounts of data - no problems with query itself), however it returns only about 10,000 records, and I don't need to insert those with a parallel hint.
Edited by: user577453 on Mar 17, 2009 12:25 PM -- Added last paragraph.

user577453 wrote:
I think that I am misusing the parallel hint on this one, and would appreciate some guidance. I have an insert statement as such:
I put EXECUTE IMMEDIATE 'ALTER SESSION ENABLE PARALLEL DML'; at the beginning of the procedure, but that did not help.
I really need the parallel to be in the SELECT statement, that statement runs for about 3 hours without a parallel (due to large amounts of data - no problems with query itself), however it returns only about 10,000 records, and I don't need to insert those with a parallel hint.First of all, your subject is probably supposed to be "Parallel hint as part of *insert* not working" rather than "Parallel hint as part of *index* not working", am I right?
Can you show us the EXPLAIN PLAN output you get for your query and the one you get for your INSERT when using the parallel hints as posted?
Please mention your database version (4-digits, e.g. 10.2.0.3).
Please use DBMS_XPLAN.DISPLAY to format the EXPLAIN PLAN output if you're already on 9i or later, and please use the \ tag before and after the DISPLAY output to format it in fixed font for readability.
What seems to be odd that you say that the result of the query seems to be different when using it as part of the INSERT statement? Are you sure that running the query standalone returns data whereas using exactly the same query in the INSERT statement inserts no records? This would be buggy behaviour.
Regards,
Randolf
Oracle related stuff blog:
http://oracle-randolf.blogspot.com/
SQLTools++ for Oracle (Open source Oracle GUI for Windows):
http://www.sqltools-plusplus.org:7676/
http://sourceforge.net/projects/sqlt-pp/

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Parallel hint as part of index not working

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