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From "Phabricator (Commented) (JIRA)" <>
Subject [jira] [Commented] (HIVE-2592) ConstantOI doesn't always propagate to UDAF
Date Tue, 22 Nov 2011 00:19:40 GMT


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.


> ConstantOI doesn't always propagate to UDAF
> -------------------------------------------
>                 Key: HIVE-2592
>                 URL:
>             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;
> SELECT percentile_approx(cast(substr(src.value,5) AS double), 0.5) FROM src;

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