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https://issues.apache.org/jira/browse/HIVE-1644?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13027286#comment-13027286
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John Sichi commented on HIVE-1644:
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The correct behavior is to not do any work at all (it would be sad to scan the
whole table when the index already told us there is nothing there). Setting an
empty array of paths didn't work?
I believe in some cases for other kinds of execution, we create an empty file
and scan that. I forget where the code for that lives.
> use filter pushdown for automatically accessing indexes
> -------------------------------------------------------
>
> Key: HIVE-1644
> URL: https://issues.apache.org/jira/browse/HIVE-1644
> Project: Hive
> Issue Type: Improvement
> Components: Indexing
> Affects Versions: 0.8.0
> Reporter: John Sichi
> Assignee: Russell Melick
> Attachments: HIVE-1644.1.patch, HIVE-1644.10.patch,
> HIVE-1644.11.patch, HIVE-1644.12.patch, HIVE-1644.13.patch,
> HIVE-1644.14.patch, HIVE-1644.15.patch, HIVE-1644.16.patch,
> HIVE-1644.17.patch, HIVE-1644.18.patch, HIVE-1644.2.patch, HIVE-1644.3.patch,
> HIVE-1644.4.patch, HIVE-1644.5.patch, HIVE-1644.6.patch, HIVE-1644.7.patch,
> HIVE-1644.8.patch, HIVE-1644.9.patch, hive.log
>
>
> HIVE-1226 provides utilities for analyzing filters which have been pushed
> down to a table scan. The next step is to use these for selecting available
> indexes and generating access plans for those indexes.
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