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https://issues.apache.org/jira/browse/HIVE-460?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12718349#action_12718349
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He Yongqiang commented on HIVE-460:
-----------------------------------
One comment to the results of input20.q:
the output data for input20.q in my patch has a NULL column. Even I download a
clean truck code, the NULL output column still exists, so i guess it may has
some relation to my machine. So please test input20.q seperately or pls delete
the input20.q's output results(input20.q.out) contained in the patch before
running the test.
> Improve ColumnPruner to prune more aggressively and keep column information
> for input tables
> --------------------------------------------------------------------------------------------
>
> Key: HIVE-460
> URL: https://issues.apache.org/jira/browse/HIVE-460
> Project: Hadoop Hive
> Issue Type: Improvement
> Components: Query Processor
> Affects Versions: 0.4.0
> Reporter: Zheng Shao
> Assignee: He Yongqiang
> Attachments: hive-460-2009-05-29-noaliasallowed.patch,
> hive-460-2009-06-04-2-195mapjoin.patch,
> hive-460-2009-06-04-testcli-passed.patch, hive-460-2009-06-06-2.patch,
> hive-460-2009-06-10-2.patch, HIVE-460.1.patch
>
>
> This is required for column-based table format.
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