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https://issues.apache.org/jira/browse/HIVE-13557?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15690222#comment-15690222
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Zoltan Haindrich commented on HIVE-13557:
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[~leftylev] I've added a section about intervals to the datatypes docs, can you
please take a look? I tried to keep it brief ;)
https://cwiki.apache.org/confluence/display/Hive/LanguageManual+Types#LanguageManualTypes-Intervals
> Make interval keyword optional while specifying DAY in interval arithmetic
> --------------------------------------------------------------------------
>
> Key: HIVE-13557
> URL: https://issues.apache.org/jira/browse/HIVE-13557
> Project: Hive
> Issue Type: Sub-task
> Components: Types
> Reporter: Ashutosh Chauhan
> Assignee: Zoltan Haindrich
> Labels: TODOC2.2
> Attachments: HIVE-13557.1.patch, HIVE-13557.1.patch,
> HIVE-13557.1.patch, HIVE-13557.2.patch, HIVE-13557.3.patch, HIVE-13557.3.patch
>
>
> Currently we support expressions like: {code}
> WHERE SOLD_DATE BETWEEN ((DATE('2000-01-31')) - INTERVAL '30' DAY) AND
> DATE('2000-01-31')
> {code}
> We should support:
> {code}
> WHERE SOLD_DATE BETWEEN ((DATE('2000-01-31')) + (-30) DAY) AND
> DATE('2000-01-31')
> {code}
>
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