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6.2

Stored outlines in Oracle 11g

Asked by TyghLehman in Oracle 11.x Database, Oracle Database, Siebel

Tags: stored outline 11g oracle upgrade

When upgrading to 10g last year we had an issue with Siebel efficiency. Since siebel creates its own queries we could not optimize this through our sql code. The solution was to use stored outlines to trick oracle into doing the right thing (in this case query all rows instead of the 10 rows which was siebels default set at the session level). This was achieved by using this code:

ACTION PLAN
============
1. Create a outline for the query without any hint.

SQL> create outline osql on <select statement>

2. Create a outline for the query with hint.

SQL> create outline hsql on <select /*+ ALL_ROWS */ ...........>

3. Run the below update statement to exchange the outline osql and hsql.

SQL> UPDATE OUTLN.OL$HINTS
SET OL_NAME=DECODE(OL_NAME,'HSQL','OSQL','OSQL','HSQL')
WHERE OL_NAME IN ('HSQL','OSQL');
SQL> commit;

My problem is in 11g, the documentation clearly states:

"Oracle creates the USER_OUTLINES and USER_OUTLINE_HINTS views in the SYS tablespace based on data in the OL$ and OL$HINTS tables, respectively. Direct manipulation of the OL$, OL$HINTS, and OL$NODES tables is prohibited. "

http://download.oracle.com/docs/cd/B28359_01/server.111/b28274/outlines.htm#i29475

That being the case, how do I now work around this issue? I heard something about using 'base outlines' but haven't found much documentation on that.

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Stored outlines in Oracle 11g

Asked by TyghLehman in Oracle 11.x Database, Oracle Database, Siebel

Tags: stored outline 11g oracle upgrade

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