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https://issues.apache.org/jira/browse/LUCENE-1712?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Uwe Schindler updated LUCENE-1712:
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Attachment: LUCENE-1712.patch
Attached is a patch with the default precisionStep of 4. The javadocs of
NumericRangeQuery list all possible and senseful values.
This patch also contains some cleanup in NumericUtils (rename constants) and a
lot of other JavaDocs fixes. It also changes the token types of the TokenStream
(no difference between 32/64 bit vals needed) and adds a test for them.
> Set default precisionStep for NumericField and NumericRangeFilter
> -----------------------------------------------------------------
>
> Key: LUCENE-1712
> URL: https://issues.apache.org/jira/browse/LUCENE-1712
> Project: Lucene - Java
> Issue Type: Improvement
> Affects Versions: 2.9
> Reporter: Michael McCandless
> Assignee: Uwe Schindler
> Priority: Minor
> Fix For: 2.9
>
> Attachments: LUCENE-1712.patch
>
>
> 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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