Re: ** outline change
Date: Wed, 18 Mar 2009 11:37:11 -0700 (PDT)
I am on dev. The sql is related to MV refresh where the source
table is on remote database. The remote database is not accessible to
me as dba. only read only. The refresh is sending sql to remote
database. I have created a outline by running the mv refresh. Now I
need to change the outline. How do I do it from sqlplus since I cannot
go to tool outline management. I need to change the hint and join
method using sqlplus. I did a select * on
OL$HINTS and I can see
the hint listed and maybe it can be changed.However, I cannot see the join method listed like hash join etc. Thanks for help.
- On Wed, 3/18/09, Riyaj Shamsudeen <riyaj.shamsudeen_at_gmail.com> wrote: From: Riyaj Shamsudeen <riyaj.shamsudeen_at_gmail.com> Subject: Re: ** outline change To: ajoshi97_at_yahoo.com Cc: oracle-l_at_freelists.org Date: Wednesday, March 18, 2009, 1:54 PM
You really need to create outlines through the application, if you don't have access to code. Oracle uses signature which is raw(16) column and seems to be generated from SQL text. Unless, you have exactly same text, signature doesn't match. You might want to run this process in dev or test ( with logon trigger based created_stored_outlines=true or whole system ) and collect outlines. Then drop all outlines except that specific outline you are tuning.
Once you have that outline
collected, then you can get sql_text from outln.ol$. Tune that SQL and then create outline using 'create outline <olname> for <sqltext>'. At this point, you have two outlines and you can swap them using that technique in that ML document. Technically, speaking you can update ol_name as that is the link between all three tables. Of course, it is better idea to update hint_count also.
It is easy to copy that outline from
dev to prod using exp/imp (in unix, $, single quote, double quote, ( etc need to be excaped or use parfile for exp.).
userid=\"/ as sysdba\" file=outln_tuned.dmp log=outln_tuned.log tables=\( outln.ol\$, outln.ol\$nodes, outln.ol\$hints \) query=\" where ol_name=\'SYS_OUTLINE_070710104645510\'\"
import that in PROD.
imp userid=\"/ as sysdba\" file=outln_tuned.dmp log=outln_tuned..log fromuser=outln touser=outln ignore=Y
As a side note, sql_text in
outln.ol$ is a long column and searching for a specific sql_Text is not easy one. To search easier use this method: Create a clob column and search on that.
create table rs.ol$lob (ol_name varchar2(30), sql_text clob) tablespace users;
insert into rs.ol$lob select ol_name, to_lob(sql_text) from outln.ol$;
now, you can search on text...select * from rs.ol$lob where upper(sql_text) like '%T1$';
-- Cheers Riyaj On Wed, Mar 18, 2009 at 11:58 AM, A Joshi <ajoshi977_at_yahoo.com> wrote: Riyaj, Yes. I had seen this note. It is applicable for when we have two outlines one good one bad and then exchange. In my case : I cannot change query etc and create outline since it is indirect query. So I need to create outline and then change it. Another problem is my OEM is not working for which I sent another mail. So any help is welcome. Thanks --- On Wed, 3/18/09, Riyaj Shamsudeen <riyaj.shamsudeen_at_gmail.com> wrote: From: Riyaj Shamsudeen <riyaj.shamsudeen_at_gmail.co Subject: Re: ** outline change To: ajoshi977_at_yahoo.com Cc: oracle-l_at_freelists.org Date: Wednesday, March 18, 2009, 11:07 AM Hi Joshi Have you reviewed document 730062.1? That document is the correct way to manipulate outlines. -- Cheers Riyaj Shamsudeen Principal DBA, Ora!nternals - http://www.orainternals.com Specialists in Performance, Recovery and EBS11i Blog: http://orainternals.wordpress.com On Wed, Mar 18, 2009 at 9:12 AM, A Joshi <ajoshi977_at_yahoo.com> wrote: Hi, I want to update a stored outline to change the join method. Is there a way it can be done from sqlplus instead of from OEM or tool. Using just unix sqlplus access. I looked at DBMS_OUTLN package but nothing in it. I do see tables like outln.ol$hints and the outline in it but I do not want to do a sqlplus update on it without knowing the full impact. I cannot change the query with hint etc since it is a indirect query. So I cannot give hint etc and exchange plan. Thanks for help. In TOAD : it says there is outline management but I cannot find it. Thanks -- http://www.freelists.org/webpage/oracle-lReceived on Wed Mar 18 2009 - 13:37:11 CDT