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https://issues.apache.org/jira/browse/HIVE-5756?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13840719#comment-13840719
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Eric Hanson commented on HIVE-5756:
-----------------------------------
Item 2 (re: copySelected isRepeating handling) is fixed in combined patch.
Item 3: yes, we can fill a vector with the same value by using
isRepeating=true, and filling the vector entry 0. This is independent of
whether selectedInUse is true. If selectedInUse is true, only the selected row
numbers will matter, but the value for all of them must come from the repeating
value for this column.
Item 4: I added this to Vectorizer.java:
// For conditional expressions
supportedGenericUDFs.add(GenericUDFIf.class);
> Implement vectorization support for IF conditional expression for long,
> double, timestamp and boolean inputs
> ------------------------------------------------------------------------------------------------------------
>
> Key: HIVE-5756
> URL: https://issues.apache.org/jira/browse/HIVE-5756
> Project: Hive
> Issue Type: Sub-task
> Reporter: Eric Hanson
> Assignee: Eric Hanson
> Attachments: HIVE-5756.1.patch, HIVE-5756.2.patch, HIVE-5756.3.patch,
> HIVE-5756.4.patch, HIVE-5756.5.patch, HIVE-5756.6.patch.txt
>
>
> Implement full, end-to-end support for IF 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 IF is the most popular conditional expression.
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