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https://issues.apache.org/jira/browse/SOLR-2525?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13076294#comment-13076294
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David commented on SOLR-2525:
-----------------------------
Timezone needs to be taken into account when doing date math. Currently it
isn't. DateMathParser instances created are told to use UTC. This is a huge
issue when it comes to faceting. Depending on your timezone day-light-savings
changes the length of a month. A facet gap of +1MONTH is different depending on
the timezone and the time of the year.
I believe the issue is very simple to fix. There are three places in the code
DateMathParser created. All three are configured with the timezone being UTC.
If a user could specify the TimeZone to pass into DateMathParser this faceting
issue would be resolved.
> Date Faceting or Range Faceting with offset doesn't convert timezone
> --------------------------------------------------------------------
>
> Key: SOLR-2525
> URL: https://issues.apache.org/jira/browse/SOLR-2525
> Project: Solr
> Issue Type: Bug
> Components: Schema and Analysis, search
> Affects Versions: 3.1
> Environment: Solr 3.1
> Windows 2008 RC2 Server
> Java 6
> Running on Jetty
> Reporter: Rohit Gupta
> Labels: date, facet
>
> I am trying to facet based on date field and apply user timezone offset so
> that the faceted results are in user timezone. My faceted result is given
> below,
> <?xml version="1.0" encoding="UTF-8"?>
> <response>
> <lst name="responseHeader">
> <int name="status">0</int>
> <int name="QTime">6</int>
> <lst name="params">
> <str name="facet">true</str>
> <str name="q">icici</str>
> <str
> name="facet.range.start">2011-05-02T00:00:00Z+330MINUTES</str>
> <str name="facet.range">createdOnGMTDate</str>
> <str name="facet.range.end">2011-05-18T00:00:00Z</str>
> <str name="facet.range.gap">+1DAY</str>
> </lst>
> </lst>
> <lst name="facet_counts">
> <lst name="facet_ranges">
> <lst name="createdOnGMTDate">
> <lst name="counts">
> <int name="2011-05-02T05:30:00Z">4</int>
> <int name="2011-05-03T05:30:00Z">63</int>
> <int name="2011-05-04T05:30:00Z">0</int>
> <int name="2011-05-05T05:30:00Z">0</int>
> ......
> </lst>
> <str name="gap">+1DAY</str>
> <date name="start">2011-05-02T05:30:00Z</date>
> <date name="end">2011-05-18T05:30:00Z</date>
> </lst>
> </lst>
> </lst>
> </response>
> Now if you notice that the response show 4 records for the 2th of May 2011
> which will fall in the IST timezone (+330MINUTES), but when I try to get the
> results I see that there is only 1 result for the 2nd why is this happening.
> <?xml version="1.0" encoding="UTF-8"?>
> <response>
> <lst name="responseHeader">
> <int name="status">0</int>
> <int name="QTime">5</int>
> <lst name="params">
> <str name="sort">createdOnGMTDate asc</str>
> <str
> name="fl">createdOnGMT,createdOnGMTDate,twtText</str>
> <str
> name="fq">createdOnGMTDate:[2011-05-01T00:00:00Z+330MINUTES TO *] </str>
> <str name="q">icici</str>
> </lst>
> </lst>
> <result name="response" numFound="67" start="0">
> <doc>
> <str name="createdOnGMT">Mon, 02 May 2011 16:27:05+0000</str>
> <date name="createdOnGMTDate">2011-05-02T16:27:05Z</date>
> <str name="twtText">#TechStrat615. Infosys (business soln &
> IT
> outsourcer) manages damages with new chairman
> K.Kamath (ex ICICI
> Bank chairman) to begin Aug 21.</str>
> </doc>
> <doc>
> <str name="createdOnGMT">Mon, 02 May 2011 19:00:44+0000</str>
> <date name="createdOnGMTDate">2011-05-02T19:00:44Z</date>
> <str name="twtText">how to get icici mobile banking</str>
> </doc>
> <doc>
> <str name="createdOnGMT">Tue, 03 May 2011 01:53:05+0000</str>
> <date name="createdOnGMTDate">2011-05-03T01:53:05Z</date>
> <str name="twtText">ICICI BANK LTD, L. M. MIRAJ branch in
> SANGLI,
> MAHARASHTRA. IFSC Code: ICIC0006537, MICR
> Code: ...
> http://bit.ly/fJCuWl #ifsc #micr #bank</str>
> </doc>
> <doc>
> <str name="createdOnGMT">Tue, 03 May 2011 01:53:05+0000</str>
> <date name="createdOnGMTDate">2011-05-03T01:53:05Z</date>
> <str name="twtText">ICICI BANK LTD, L. M. MIRAJ branch in
> SANGLI,
> MAHARASHTRA. IFSC Code: ICIC0006537, MICR
> Code: ...
> http://bit.ly/fJCuWl #ifsc #micr #bank</str>
> </doc>
> <doc>
> <str name="createdOnGMT">Tue, 03 May 2011 08:52:37+0000</str>
> <date name="createdOnGMTDate">2011-05-03T08:52:37Z</date>
> <str name="twtText">RT @nice4ufan: ICICI BANK PERSONAL LOAN
> http://ee4you.blogspot.com/2011/04/icici-bank-personal-loan.html </str>
> </doc>
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