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From "Uwe Schindler (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (LUCENE-1768) NumericRange support for new query parser
Date Fri, 10 Jun 2011 17:03:59 GMT

    [ https://issues.apache.org/jira/browse/LUCENE-1768?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13047291#comment-13047291
] 

Uwe Schindler commented on LUCENE-1768:
---------------------------------------

Hi Vinicius,

if you want the code be committed later, you should check the license box ("Grant license
to ASF for inclusion in ASF works (as per the Apache License ยง5)"), else we will be not able
to submit it to the main repository.

If you want us to commit the patch only at the end of GSOC, it's enough to check this box
in your final submission, but it should be noted, that we may submit minor parts of the work
even before (once you are at a state where it is 'useable' and passes existing tests). A second
commit could e.g. adding sophisticated tests, and so on.

> NumericRange support for new query parser
> -----------------------------------------
>
>                 Key: LUCENE-1768
>                 URL: https://issues.apache.org/jira/browse/LUCENE-1768
>             Project: Lucene - Java
>          Issue Type: New Feature
>          Components: core/queryparser
>    Affects Versions: 2.9
>            Reporter: Uwe Schindler
>            Assignee: Adriano Crestani
>              Labels: contrib, gsoc, gsoc2011, lucene-gsoc-11, mentor
>             Fix For: 4.0
>
>         Attachments: week1.patch, week2.patch
>
>
> It would be good to specify some type of "schema" for the query parser in future, to
automatically create NumericRangeQuery for different numeric types? It would then be possible
to index a numeric value (double,float,long,int) using NumericField and then the query parser
knows, which type of field this is and so it correctly creates a NumericRangeQuery for strings
like "[1.567..*]" or "(1.787..19.5]".
> There is currently no way to extract if a field is numeric from the index, so the user
will have to configure the FieldConfig objects in the ConfigHandler. But if this is done,
it will not be that difficult to implement the rest.
> The only difference between the current handling of RangeQuery is then the instantiation
of the correct Query type and conversion of the entered numeric values (simple Number.valueOf(...)
cast of the user entered numbers). Evenerything else is identical, NumericRangeQuery also
supports the MTQ rewrite modes (as it is a MTQ).
> Another thing is a change in Date semantics. There are some strange flags in the current
parser that tells it how to handle dates.

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