Mailing-List: contact java-user-help@lucene.apache.org; run by ezmlm
Precedence: bulk
Reply-To: java-user@lucene.apache.org
Received-SPF: pass (asf.osuosl.org: local policy)
Mime-Version: 1.0 (Apple Message framework v730)
In-Reply-To: <8a484a780507211243791da55f@mail.gmail.com>
References: <8a484a7805072108533a1d1d45@mail.gmail.com>
 <7C8F343C-774F-487C-8B0E-C108CA943319@ehatchersolutions.com>
 <8a484a780507211243791da55f@mail.gmail.com>
Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed
Message-Id: <88EA1632-D940-4E37-B5CD-63266F77E5AC@ehatchersolutions.com>
Content-Transfer-Encoding: 7bit
From: Erik Hatcher <erik@ehatchersolutions.com>
Subject: Re: Add unique id to a doc
Date: Thu, 21 Jul 2005 16:20:11 -0400
To: java-user@lucene.apache.org


On Jul 21, 2005, at 3:43 PM, Riccardo Daviddi wrote:
> What I want to to is to assign a unique id to each doc I add to the  
> index.
> I was wondering if there is a method to assign a unique id directly
> looking in the index so after I could store my doc in a db with the
> same id as key.

So first Lucene, then the DB?

How about generating a GUID for each document?  Or perhaps a digest  
of it's contents?

     Erik


>
> On 7/21/05, Erik Hatcher <erik@ehatchersolutions.com> wrote:
>
>> You could certainly use IndexReader to get the last document in the
>> index and retrieve its ID, but why?
>>
>> What use case do you have in mind for such id's?  Do they have a non-
>> arbitrary meaning?  Do your documents have nothing unique to identify
>> them already?
>>
>>      Erik
>>
>>
>> On Jul 21, 2005, at 11:53 AM, Riccardo Daviddi wrote:
>>
>>
>>> Hi all,
>>>
>>> it's possible to set an unique id (as keyword field) to a doc by
>>> looking in the index? I mean, it's possible to look in the index and
>>> know what is the last id (which is a keyword field) and then decide
>>> for the new id to associate to the new indexed doc? Or it's better
>>> store the doc in a db and get so a unique id (the key of the row in
>>> the db) and use it as the unique id for the keyword field in the
>>> index?
>>>
>>> --
>>> Riccardo Daviddi
>>>
>>> -------------------------------------------------------------------- 
>>> -
>>> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
>>> For additional commands, e-mail: java-user-help@lucene.apache.org
>>>
>>>
>>
>>
>> ---------------------------------------------------------------------
>> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
>> For additional commands, e-mail: java-user-help@lucene.apache.org
>>
>>
>>
>
>
> -- 
> Riccardo Daviddi
>
> ---------------------------------------------------------------------
> To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
> For additional commands, e-mail: java-user-help@lucene.apache.org
>


---------------------------------------------------------------------
To unsubscribe, e-mail: java-user-unsubscribe@lucene.apache.org
For additional commands, e-mail: java-user-help@lucene.apache.org