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From "Hanifi Gunes (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-1680) Use a different expession for ArraySegment and NamedSegment accessors
Date Fri, 14 Nov 2014 18:57:34 GMT

    [ https://issues.apache.org/jira/browse/DRILL-1680?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14212630#comment-14212630
] 

Hanifi Gunes commented on DRILL-1680:
-------------------------------------

My understanding is that changing the operator name disables pushdown into sub-scans. Am I
right? If so, do we really disable pushdown into subscans?

> Use a different expession for ArraySegment and NamedSegment accessors
> ---------------------------------------------------------------------
>
>                 Key: DRILL-1680
>                 URL: https://issues.apache.org/jira/browse/DRILL-1680
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Query Planning & Optimization
>            Reporter: Hanifi Gunes
>            Assignee: Aman Sinha
>
> Drill planner treats ArraySegment accessors the same way with NamedSegment accessors.
This ambiguity causes planner to loop indefinitely when projection pushdown is enabled (see
DRILL-1455). We need to distinctly name two operators that have been used to access array
segments and named segments. Array segments should still use ITEM. However named segments
should be accessed via some other name just like GETCOLUMN/GETFIELD.



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