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From "Earwin Burrfoot (JIRA)" <>
Subject [jira] Commented: (LUCENE-1712) Set default precisionStep for NumericField and NumericRangeFilter
Date Mon, 22 Jun 2009 21:36:07 GMT


Earwin Burrfoot commented on LUCENE-1712:

Am I misunderstanding something or the problem still persists?
Even if you use a common default, what is your base type - int or long? Are floats converted
to ints, or to longs?

> Set default precisionStep for NumericField and NumericRangeFilter
> -----------------------------------------------------------------
>                 Key: LUCENE-1712
>                 URL:
>             Project: Lucene - Java
>          Issue Type: Improvement
>    Affects Versions: 2.9
>            Reporter: Michael McCandless
>            Priority: Minor
>             Fix For: 2.9
> This is a spinoff from LUCENE-1701.
> A user using Numeric* should not need to understand what's
> "under the hood" in order to do their indexing & searching.
> They should be able to simply:
> {code}
> doc.add(new NumericField("price", 15.50);
> {code}
> And have a decent default precisionStep selected for them.
> Actually, if we add ctors to NumericField for each of the supported
> types (so the above code works), we can set the default per-type.  I
> think we should do that?
> 4 for int and 6 for long was proposed as good defaults.
> The default need not be "perfect", as advanced users can always
> optimize their precisionStep, and for users experiencing slow
> RangeQuery performance, NumericRangeQuery with any of the defaults we
> are discussing will be much faster.

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