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https://issues.apache.org/jira/browse/HIVE-5757?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Eric Hanson updated HIVE-5757:
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Description:
Implement support for CASE in vectorized mode. The approach is to use the
vectorized UDF adaptor internally. A higher-performance version that used
VectorExpression subclasses was considered but not done due to complexity. Such
a version potentially could be done in the future if it's important enough.
This is high priority because CASE is a fairly popular expression.
was:
Implement full, end-to-end support for CASE 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 but optional.
This is high priority because CASE is a fairly popular expression.
> Implement vectorized support for CASE
> -------------------------------------
>
> Key: HIVE-5757
> URL: https://issues.apache.org/jira/browse/HIVE-5757
> Project: Hive
> Issue Type: Sub-task
> Affects Versions: 0.13.0
> Reporter: Eric Hanson
> Assignee: Eric Hanson
> Attachments: HIVE-5757.1.patch, HIVE-5757.2.patch, HIVE-5757.3.patch
>
>
> Implement support for CASE in vectorized mode. The approach is to use the
> vectorized UDF adaptor internally. A higher-performance version that used
> VectorExpression subclasses was considered but not done due to complexity.
> Such a version potentially could be done in the future if it's important
> enough.
> This is high priority because CASE is a fairly popular expression.
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