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https://issues.apache.org/jira/browse/HIVE-12767?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15886739#comment-15886739
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Sergio Peña commented on HIVE-12767:
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+1
Thanks [~zsombor.klara]. I think the patch is good now.
Thanks for continuing the work on this patch.
> Implement table property to address Parquet int96 timestamp bug
> ---------------------------------------------------------------
>
> Key: HIVE-12767
> URL: https://issues.apache.org/jira/browse/HIVE-12767
> Project: Hive
> Issue Type: Bug
> Affects Versions: 1.2.1, 2.0.0
> Reporter: Sergio Peña
> Assignee: Barna Zsombor Klara
> Attachments: HIVE-12767.10.patch, HIVE-12767.11.patch,
> HIVE-12767.3.patch, HIVE-12767.4.patch, HIVE-12767.5.patch,
> HIVE-12767.6.patch, HIVE-12767.7.patch, HIVE-12767.8.patch,
> HIVE-12767.9.patch, TestNanoTimeUtils.java
>
>
> Parque timestamps using INT96 are not compatible with other tools, like
> Impala, due to issues in Hive because it adjusts timezones values in a
> different way than Impala.
> To address such issues. a new table property (parquet.mr.int96.write.zone)
> must be used in Hive that detects what timezone to use when writing and
> reading timestamps from Parquet.
> The following is the exit criteria for the fix:
> * Hive will read Parquet MR int96 timestamp data and adjust values using a
> time zone from a table property, if set, or using the local time zone if it
> is absent. No adjustment will be applied to data written by Impala.
> * Hive will write Parquet int96 timestamps using a time zone adjustment from
> the same table property, if set, or using the local time zone if it is
> absent. This keeps the data in the table consistent.
> * New tables created by Hive will set the table property to UTC if the global
> option to set the property for new tables is enabled.
> ** Tables created using CREATE TABLE and CREATE TABLE LIKE FILE will not set
> the property unless the global setting to do so is enabled.
> ** Tables created using CREATE TABLE LIKE <OTHER TABLE> will copy the
> property of the table that is copied.
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