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https://issues.apache.org/jira/browse/HIVE-7215?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14029632#comment-14029632
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Prasanth J commented on HIVE-7215:
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bq. If there is a non null check, will the row group which has all nulls be
ignored?
Yes. Thats correct.
HIVE-4639 addresses the improvement that I mentioned (having boolean flag
within index).
> Support predicate pushdown for null checks in ORCFile
> -----------------------------------------------------
>
> Key: HIVE-7215
> URL: https://issues.apache.org/jira/browse/HIVE-7215
> Project: Hive
> Issue Type: Improvement
> Reporter: Rohini Palaniswamy
>
> Came across this missing feature during discussion of PIG-3760.
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