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Posted to java-user@lucene.apache.org by Shay Banon <ki...@gmail.com> on 2009/06/28 11:21:16 UTC
Delete by docId in IndexWriter
Hi,
I have a case where deleting documents by doc id make sense (I know
before hand the docs I want to delete based on the doc id). I am wondering
why the API is not exposed in the IndexWriter (as it is in IndexReader). I
understand that this API is more "expert" than typical usage, but it allows
for certain optimization on my end (already performed the query for deletion
and I have the doc ids, so I don't want to perform it again...). It looks
like the DocumentsWriter already has support for deleting by document id, so
I was wondering if it is possible to expose it in IndexWriter.
Thanks,
Shay
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Re: Delete by docId in IndexWriter
Posted by Ganesh <em...@yahoo.co.in>.
This issue has been raised earlier. IndexWriter is not providing any functionality to delete by doc id. IndexReader does, but it requires write permission. In my case, IndexReader and IndexWriter will be opened always. IR will be reopened frequently. To delete, i have no other option to write a query using IW and delete, evethough i know docid.
This feature is a required one.
Regards
Ganesh
----- Original Message -----
From: "Jason Rutherglen" <ja...@gmail.com>
To: <ja...@lucene.apache.org>
Sent: Monday, June 29, 2009 6:54 AM
Subject: Re: Delete by docId in IndexWriter
> This requires tracking the genealogy of docids as they are merged inside
> IndexWriter. It's doable, so if you're particularly interested feel free to
> open a jira issue.
>
> On Sun, Jun 28, 2009 at 2:21 AM, Shay Banon <ki...@gmail.com> wrote:
>
>>
>> Hi,
>>
>> I have a case where deleting documents by doc id make sense (I know
>> before hand the docs I want to delete based on the doc id). I am wondering
>> why the API is not exposed in the IndexWriter (as it is in IndexReader). I
>> understand that this API is more "expert" than typical usage, but it allows
>> for certain optimization on my end (already performed the query for
>> deletion
>> and I have the doc ids, so I don't want to perform it again...). It looks
>> like the DocumentsWriter already has support for deleting by document id,
>> so
>> I was wondering if it is possible to expose it in IndexWriter.
>>
>> Thanks,
>> Shay
>> --
>> View this message in context:
>> http://www.nabble.com/Delete-by-docId-in-IndexWriter-tp24239930p24239930.html
>> Sent from the Lucene - Java Users mailing list archive at Nabble.com.
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
>> For additional commands, e-mail: java-user-help@lucene.apache.org
>>
>
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Re: Delete by docId in IndexWriter
Posted by Shay Banon <ki...@gmail.com>.
Agreed, thats the tricky part. I will open a Jira issue. Really hoping to get
some time and maybe also provide a patch...
Thanks,
Shay
Jason Rutherglen-2 wrote:
>
> This requires tracking the genealogy of docids as they are merged inside
> IndexWriter. It's doable, so if you're particularly interested feel free
> to
> open a jira issue.
>
> On Sun, Jun 28, 2009 at 2:21 AM, Shay Banon <ki...@gmail.com> wrote:
>
>>
>> Hi,
>>
>> I have a case where deleting documents by doc id make sense (I know
>> before hand the docs I want to delete based on the doc id). I am
>> wondering
>> why the API is not exposed in the IndexWriter (as it is in IndexReader).
>> I
>> understand that this API is more "expert" than typical usage, but it
>> allows
>> for certain optimization on my end (already performed the query for
>> deletion
>> and I have the doc ids, so I don't want to perform it again...). It looks
>> like the DocumentsWriter already has support for deleting by document id,
>> so
>> I was wondering if it is possible to expose it in IndexWriter.
>>
>> Thanks,
>> Shay
>> --
>> View this message in context:
>> http://www.nabble.com/Delete-by-docId-in-IndexWriter-tp24239930p24239930.html
>> Sent from the Lucene - Java Users mailing list archive at Nabble.com.
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
>> For additional commands, e-mail: java-user-help@lucene.apache.org
>>
>
>
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Re: Delete by docId in IndexWriter
Posted by Jason Rutherglen <ja...@gmail.com>.
This requires tracking the genealogy of docids as they are merged inside
IndexWriter. It's doable, so if you're particularly interested feel free to
open a jira issue.
On Sun, Jun 28, 2009 at 2:21 AM, Shay Banon <ki...@gmail.com> wrote:
>
> Hi,
>
> I have a case where deleting documents by doc id make sense (I know
> before hand the docs I want to delete based on the doc id). I am wondering
> why the API is not exposed in the IndexWriter (as it is in IndexReader). I
> understand that this API is more "expert" than typical usage, but it allows
> for certain optimization on my end (already performed the query for
> deletion
> and I have the doc ids, so I don't want to perform it again...). It looks
> like the DocumentsWriter already has support for deleting by document id,
> so
> I was wondering if it is possible to expose it in IndexWriter.
>
> Thanks,
> Shay
> --
> View this message in context:
> http://www.nabble.com/Delete-by-docId-in-IndexWriter-tp24239930p24239930.html
> Sent from the Lucene - Java Users mailing list archive at Nabble.com.
>
>
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> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
> For additional commands, e-mail: java-user-help@lucene.apache.org
>