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From "Jinfeng Ni (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-1663) Implicit cast to variable width type does not work in join conditions
Date Sat, 08 Nov 2014 16:43:34 GMT

    [ https://issues.apache.org/jira/browse/DRILL-1663?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14203497#comment-14203497
] 

Jinfeng Ni commented on DRILL-1663:
-----------------------------------

+1

> Implicit cast to variable width type does not work in join conditions
> ---------------------------------------------------------------------
>
>                 Key: DRILL-1663
>                 URL: https://issues.apache.org/jira/browse/DRILL-1663
>             Project: Apache Drill
>          Issue Type: Bug
>            Reporter: Mehant Baid
>            Assignee: Mehant Baid
>            Priority: Minor
>         Attachments: DRILL-1663.patch
>
>
> Currently if the two sides of a join condition are of different types then we implicitly
add a cast on one side so that the join condition works as expected. However when we apply
a cast to variable width type (varchar or varbinary) we don't include the length parameter
as part of the arguments. This causes the function resolver to not match against any function
implementation and return a NULL expression. 



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