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From "Vinicius Barros (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (LUCENE-1768) NumericRange support for new query parser
Date Sun, 03 Jul 2011 05:54:22 GMT

     [ https://issues.apache.org/jira/browse/LUCENE-1768?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Vinicius Barros updated LUCENE-1768:
------------------------------------

    Attachment: week5-6.patch

This patch includes code from week 5 and 6. Sorry for taking so long to submit a new patch,
but I was hitting many problems when I finally started run the junits.

I updated my workspace and got the new changes which use NumericField to add numeric fields
to Documents. So I adapted my junits to that and also refactored some code to use NumericField.DataType
in NumericConfig, instead of using Class<? extends Number> when specifying the NumericConfig
type.

I added a junit class (TestNumericQueryParser). I reused some LuceneTestCase methods, mainly
the ones that generate random things. I took sometime to get where I wanted, I was hitting
many problems when using dates in range. In the end, I liked the way the junit is running,
inputs are very random, mainly the date formats, using randomly different format styles and
locale. I ran the junit in a loop 1000 times and I got no error, so I think it's pretty stable
now. Uwe, please, take a look and let me know what you think about it.

testInclusiveLowerRangeQuery and testInclusiveUpperRangeQuery are commented since I found
that StandardQueryParser is not supporting mixed include syntaxes, such as {1 TO 2]. Shouldn't
it be supported? I don't see why not.

Also, the query parser is not supporting open ended range queries, such as [... to 3].

I am checking "Grant license to ASF for inclusion in ASF works (as per the Apache License
ยง5)" now, because I think the patch is finally ready to be checked in. I ran Lucene top level
ant and it finished successfully.

I will work on creating javadocs now.

> 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, week3.patch, week4.patch, week5-6.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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