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https://issues.apache.org/jira/browse/HIVE-5759?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13899436#comment-13899436
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Jitendra Nath Pandey commented on HIVE-5759:
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Review board entry: https://reviews.apache.org/r/18025/
> Implement vectorized support for COALESCE conditional expression
> ----------------------------------------------------------------
>
> Key: HIVE-5759
> URL: https://issues.apache.org/jira/browse/HIVE-5759
> Project: Hive
> Issue Type: Sub-task
> Reporter: Eric Hanson
> Assignee: Jitendra Nath Pandey
> Attachments: HIVE-5759.1.patch
>
>
> Implement full, end-to-end support for COALESCE in vectorized mode, including
> new VectorExpression class(es), VectorizationContext translation to a
> VectorExpression, and unit tests for these, as well as end-to-end ad hoc
> testing. An end-to-end .q test is recommended.
> This is lower priority than IF and CASE but it is still a fairly popular
> expression.
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