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Home -> Community -> Mailing Lists -> Oracle-L -> RE: logon trigger
Hi Mike
Siebel has released a note whereby they approve CBO for the EIM process.
Also what I have is a SM Data warehouse logon into the OLTP Siebel db. The activities this logon does is more akin to OLAP. So what I am doing is giving this logon a big sort area size, enabling parallel access for the user, setting it's session to CBO etc etc.
George
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-----Original Message-----
Sent: 02 October 2002 18:24 PM
To: Multiple recipients of list ORACLE-L
In looking at this and thinking about it...doesn't any DDL statement do an implied COMMIT? If so, the first "EXECUTE IMMEDIATE" will fire, commit, the SET TRANSACTION will be released, and the user will not be assured of using that rollback segment. Shouldn't the SET TRANSACTION be the last statement in the trigger?
And if Siebel wants RBO, doesn't changing the optimizer at the session level mean that all that session's queries will be performed using CBO? Is Siebel OK with that?
Cheers,
Mike
-----Original Message-----
Sent: Wednesday, October 02, 2002 8:43 AM
To: Multiple recipients of list ORACLE-L
"Alter session ..." is not DML, so I think you need to use dynamic SQL:
create or replace trigger smload.logon after logon on database
begin
SET TRANSACTION USE ROLLBACK SEGMENT RBBIG01;
EXECUTE IMMEDIATE "Alter session enable parallel query"; EXECUTE IMMEDIATE "Alter session set SORT_AREA_SIZE = 10485760"; EXECUTE IMMEDIATE "Alter session set OPTIMIZER_MODE = choose";end;
Igor Neyman, OCP DBA
ineyman_at_perceptron.com
> Hi guys
>
> I am trying to create the following trigger.
>
> The user in question is logging in using siebel application and siebel
does
> not allow multiple SQL statements during login so we through this might
> solve the problem. My problem now is though, the set rollback works but
the
> alter session statements does not seem to want to work.
>
> The server needs to be in RBO since this is the only mode supported by
> siebel.
>
> Help appreciated.
>
> create or replace trigger smload.logon after logon on database
> begin
> SET TRANSACTION USE ROLLBACK SEGMENT RBBIG01;
> Alter session enable parallel query;
> Alter session set SORT_AREA_SIZE = 10485760;
> Alter session set OPTIMIZER_MODE = choose;
> end;
> /
>
> George
> ________________________________________________
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