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https://issues.apache.org/jira/browse/LUCENE-1768?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13012314#comment-13012314
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Adriano Crestani commented on LUCENE-1768:
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Hi Vinicius,
Nice summary! There is a formatting problem, but I think people can understand
it.
I had to re-read all the comments, it took sometime, it seems you got all the
main points in the summary.
{quote}
-should NumericRangeQueryNode extends TermRangeQueryNode? I don't see any
reason for that, since one will hold Number values and the other String values
{quote}
You are right, it does not make sense to one extend the other. However, I think
they should have a common parent (e.g. <interface> RangeQueryNode), that will
have common methods like QueryNode getLowRange().
I will let Uwe answer the other questions, I am curious to know the answers too
:)
The student proposal period has started, so go ahead and start drafting it ;)
> 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: QueryParser
> Affects Versions: 2.9
> Reporter: Uwe Schindler
> Assignee: Adriano Crestani
> Labels: contrib, gsoc, gsoc2011, lucene-gsoc-11, mentor
> Fix For: 4.0
>
>
> 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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