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From "Jacques Nadeau (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-3838) Ability to use UDFs in the directory pruning process
Date Fri, 25 Sep 2015 16:23:04 GMT

    [ https://issues.apache.org/jira/browse/DRILL-3838?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14908270#comment-14908270

Jacques Nadeau commented on DRILL-3838:

I'm starting to think that we may want to model directory attributes as a type of join and
then support some kind of "sideband" join. This would make the algebra much clearer. The need
here is really similar to the needs for a bloomfilter pushdown join. [~julianhyde], [~jni]
and [~amansinha100] any thoughts on the best pattern around this?

> Ability to use UDFs in the directory pruning process
> ----------------------------------------------------
>                 Key: DRILL-3838
>                 URL: https://issues.apache.org/jira/browse/DRILL-3838
>             Project: Apache Drill
>          Issue Type: New Feature
>          Components: Query Planning & Optimization
>    Affects Versions: 1.2.0
>            Reporter: Stefán Baxter
> This feature request is about allowing UDFs to participate in the Directory/Partition
pruning process at runtime rather than at planing/optimization time.
> For this a UDF needs:
>  - filename
>  - full path (not just dirN)
>  - to be able to throw a IgnoreFile exception
>  - to be able to throw a IgnoreDirecotyr exception
> I think the naming is pretty self explanatory and hopefully this brief description is
> _Stefan 

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