Re: Please help to debug strange execution plan
- From: "Jared Still" <jkstill@xxxxxxxxx>
- To: mseiwert@xxxxxx
- Date: Fri, 6 Jun 2008 09:46:56 -0700
I'm not really up to speed on CTX, I've only worked with it occasionally.
On older versions of Oracle I believe you had to run a job to periodically
maintain the CTX index. You may want to consult the documentation.
Do you know that 'tatort' appears in the CTX index?
Have you rebuilt/maintained the CTX index?
Perhaps someone with more experience in context indexes could jump in here.
On Fri, Jun 6, 2008 at 3:05 AM, Michael Seiwert <mseiwert@xxxxxx> wrote:
> Yes, I think this the problem, but the question is why doesn't oracle
> choose this accespath.
>
> Best,
>
> Michael
>
> Jared Still schrieb:
>
> On Thu, Jun 5, 2008 at 2:53 AM, Michael Seiwert <mseiwert@xxxxxx <mailto:
>> mseiwert@xxxxxx>> wrote:
>>
>> Hi List,
>>
>> I have two identical queries which differ only in the search term
>> of the contains clause. Both queries produce completely different
>> execution plans and execution times.
>> If I run the the following query with searchterm 'spartacus' in
>> the contains clause the query executes within 2 seconds, if I run
>> the same query with searchterm 'tatort' the query returns in about
>> 20 minutes. Please see the attached explain plans for details.
>> Could you please help me to debug this as I want to understand
>> why oracle behaves how it behaves :-) I'll could provide more
>> information such as view definition, 10046, 10053 traces if needed.
>>
>>
>> The spartacus query is using the domain index (CTX) while the tatort query
>> is not.
>>
>> Don't know if you noticed that bit or not, you didn't mention.
>>
>>
>>
>> --
>> Jared Still
>> Certifiable Oracle DBA and Part Time Perl Evangelist
>>
>
> --
> //www.freelists.org/webpage/oracle-l
>
>
>
--
Jared Still
Certifiable Oracle DBA and Part Time Perl Evangelist
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