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https://issues.apache.org/jira/browse/HIVE-15131?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16549653#comment-16549653
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Chao Sun edited comment on HIVE-15131 at 7/19/18 6:23 PM:
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[~adeshrao]: seems the test failure
{{org.apache.hadoop.hive.cli.TestMiniLlapCliDriver.testCliDriver[mm_all]}} is
also related. Can you take a look?
was (Author: csun):
[~adeshrao]: seems the test failure
{{org.apache.hadoop.hive.cli.TestMiniLlapCliDriver.testCliDriver[mm_all] }} is
also related. Can you take a look?
> Change Parquet reader to read metadata on the task side
> -------------------------------------------------------
>
> Key: HIVE-15131
> URL: https://issues.apache.org/jira/browse/HIVE-15131
> Project: Hive
> Issue Type: Bug
> Components: Reader
> Reporter: Chao Sun
> Assignee: Adesh Kumar Rao
> Priority: Major
> Attachments: HIVE-15131.1.patch, HIVE-15131.2.patch,
> HIVE-15131.3.patch, HIVE-15131.4.patch
>
>
> Currently the {{ParquetRecordReaderWrapper}} still uses the {{readFooter}}
> API without filtering, which means it needs to read metadata about all row
> groups every time. This could some issues when input dataset is particularly
> big and has many columns.
> [Parquet-84|https://issues.apache.org/jira/browse/PARQUET-84] introduced
> another API which allows to do row group filtering on the task side. Hive
> should adopt this API.
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