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https://issues.apache.org/jira/browse/HIVE-2592?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13154759#comment-13154759
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Phabricator commented on HIVE-2592:
-----------------------------------
jonchang has commented on the revision "HIVE-2592 [jira] ConstantOI doesn't
always propagate to UDAF".
Your wish is my command =). This diff mainly gets most of semanticanalyzer
and desc nodes using object inspectors. This makes sure that all paths to plan
generation preserve the exact type (and hence constantness).
The next step to everything being copacetic will be updating the serializers.
REVISION DETAIL
https://reviews.facebook.net/D513
> ConstantOI doesn't always propagate to UDAF
> -------------------------------------------
>
> Key: HIVE-2592
> URL: https://issues.apache.org/jira/browse/HIVE-2592
> Project: Hive
> Issue Type: Bug
> Reporter: Jonathan Chang
> Assignee: Jonathan Chang
> Attachments: HIVE-2592.D513.1.patch
>
>
> Depending on the query plan, a UDAF may not actually get a constant OI. E.g.,
> set hive.map.aggr=false;
> SELECT percentile_approx(cast(substr(src.value,5) AS double), 0.5) FROM src;
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