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From Lance Norskog <goks...@gmail.com>
Subject Re: Rounding dates on sort and filter
Date Thu, 21 Jan 2010 04:44:10 GMT
The precision of the date should not matter that much in the time for
the first sort. Lucene makes a pair of arrays for the sorted field,
one with each unique date and one with each document number in the
index. (Yes, the entire index.)  The first array will be shorter when
you cut the date precision, but the latter will not shrink at all.

On Tue, Jan 19, 2010 at 12:50 PM, Charlie Jackson
<Charlie.Jackson@cision.com> wrote:
> Good point. So it doesn't sound like there's a way to do this without
> adding a new field or reindexing. Thanks anyway.
>
> - Charlie
>
>
> -----Original Message-----
> From: Otis Gospodnetic [mailto:otis_gospodnetic@yahoo.com]
> Sent: Tuesday, January 19, 2010 2:04 PM
> To: solr-user@lucene.apache.org
> Subject: Re: Rounding dates on sort and filter
>
> Charlie,
>
> Query-time terms/tokens need to match what's in your index, and my guess
> is that if you just altered query-time date field analysis, you'd get a
> mismatch.  Easy enough to check through Solr Admin Analysis page.
>
> Otis
> --
> Sematext -- http://sematext.com/ -- Solr - Lucene - Nutch
>
>
>
> ----- Original Message ----
>> From: Charlie Jackson <Charlie.Jackson@cision.com>
>> To: solr-user@lucene.apache.org
>> Sent: Tue, January 19, 2010 1:20:02 PM
>> Subject: Rounding dates on sort and filter
>>
>> I've got a legacy date field that I'd like to round for sorting and
>> filtering. Right now, the index is large enough that sorting or
>> filtering on a date field takes 10-20 seconds (unless it's cached). I
>> know this is because the date field's precision is down to the
>> millisecond, and I don't really need that level of precision for most
> of
>> my searches. So, is it possible to round my field at query time
> without
>> having to reindex the field or add a second one?
>>
>>
>>
>> I already tried the function sorting in 1.5-dev, but my field isn't a
>> TrieDate field so I can't use the ms() function (which seems to allow
>> date math unlike the other functions).
>>
>>
>>
>> Thanks,
>>
>> Charlie
>
>



-- 
Lance Norskog
goksron@gmail.com

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