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Posted to java-user@lucene.apache.org by "Kainth, Sachin" <Sa...@atkinsglobal.com> on 2007/02/23 15:33:46 UTC
Index maintainance
Hi all,
Just wondering how one would perform index maintainance. I know how to
add new documents:
writer = new IndexWriter(IndexDirectory, new PorterAnalyzer(), false);
(incidently, I wrote PorterAnalyzer myself for the PorterStemFilter
since I couldn't find an analyzer using it)
But what I don't know is how do we delete documents from the index and
how we replace documents in the index where those documents have
changed.
Cheers
Sachin
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RE: Index maintainance
Posted by Chris Hostetter <ho...@fucit.org>.
: I've just been looking at IndexReader and it seems you can do it using
: that, but I don't know which concrete implementation of IndexReader to
: use.
there is a static factory method for opening an IndexReader in the
IndexReader class (you can't call the constructors directly)
please go through the Lucene-Java tutorial and read the corrisponding demo
code ... it covers topics like these.
beyond that i don't know anyone who won't recomend you get a copy of LIA
and read it cover to cover...
http://lucene.apache.org/java/docs/gettingstarted.html
http://lucenebook.com/
-Hoss
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RE: Index maintainance
Posted by "Kainth, Sachin" <Sa...@atkinsglobal.com>.
I've just been looking at IndexReader and it seems you can do it using
that, but I don't know which concrete implementation of IndexReader to
use.
-----Original Message-----
From: Michael McCandless [mailto:lucene@mikemccandless.com]
Sent: 23 February 2007 15:07
To: java-user@lucene.apache.org
Subject: Re: Index maintainance
Erick Erickson wrote:
> If you're using 2.1, see IndexModifier. If you're previous to 2.1, the
> IndexModifier is (I think), hanging around in the contrib area. You
> have to delete a document and re-add it, there's no such thing as
"modify inplace"
> in lucene currently.
Actually as of 2.1 you can now delete and update documents through
IndexWriter. I would recommend using IndexWriter instead of
IndexModifier.
Mike
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Re: Index maintainance
Posted by Michael McCandless <lu...@mikemccandless.com>.
Erick Erickson wrote:
> If you're using 2.1, see IndexModifier. If you're previous to 2.1, the
> IndexModifier is (I think), hanging around in the contrib area. You have to
> delete a document and re-add it, there's no such thing as "modify inplace"
> in lucene currently.
Actually as of 2.1 you can now delete and update documents through
IndexWriter. I would recommend using IndexWriter instead of
IndexModifier.
Mike
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Re: Index maintainance
Posted by Erick Erickson <er...@gmail.com>.
If you're using 2.1, see IndexModifier. If you're previous to 2.1, the
IndexModifier is (I think), hanging around in the contrib area. You have to
delete a document and re-add it, there's no such thing as "modify inplace"
in lucene currently.
Erick
On 2/23/07, Kainth, Sachin <Sa...@atkinsglobal.com> wrote:
>
> Hi all,
>
> Just wondering how one would perform index maintainance. I know how to
> add new documents:
>
> writer = new IndexWriter(IndexDirectory, new PorterAnalyzer(), false);
>
> (incidently, I wrote PorterAnalyzer myself for the PorterStemFilter
> since I couldn't find an analyzer using it)
>
> But what I don't know is how do we delete documents from the index and
> how we replace documents in the index where those documents have
> changed.
>
> Cheers
>
> Sachin
>
>
> This email and any attached files are confidential and copyright
> protected. If you are not the addressee, any dissemination of this
> communication is strictly prohibited. Unless otherwise expressly agreed in
> writing, nothing stated in this communication shall be legally binding.
>
> The ultimate parent company of the Atkins Group is WS Atkins
> plc. Registered in England No. 1885586. Registered Office Woodcote Grove,
> Ashley Road, Epsom, Surrey KT18 5BW.
>
> Consider the environment. Please don't print this e-mail unless you really
> need to.
>