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From "Parth Chandra (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DRILL-3150) Error when filtering non-existent field with a string
Date Fri, 10 Jul 2015 21:51:06 GMT

    [ https://issues.apache.org/jira/browse/DRILL-3150?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14622946#comment-14622946
] 

Parth Chandra commented on DRILL-3150:
--------------------------------------

[~sphillips], [~hgunes], Does this conflict with [DRILL-3353 | https://issues.apache.org/jira/browse/DRILL-3353]
?

> Error when filtering non-existent field with a string
> -----------------------------------------------------
>
>                 Key: DRILL-3150
>                 URL: https://issues.apache.org/jira/browse/DRILL-3150
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Execution - Relational Operators
>    Affects Versions: 1.0.0
>            Reporter: Adam Gilmore
>            Assignee: Parth Chandra
>            Priority: Critical
>             Fix For: 1.2.0
>
>         Attachments: DRILL-3150.1.patch.txt
>
>
> The following query throws an exception:
> {code}
> select count(*) from cp.`employee.json` where `blah` = 'test'
> {code}
> "blah" does not exist as a field in the JSON.  The expected behaviour would be to filter
out all rows as that field is not present (thus cannot equal the string 'test').
> Instead, the following exception occurs:
> {code}
> org.apache.drill.common.exceptions.UserRemoteException: SYSTEM ERROR: test
> Fragment 0:0
> [Error Id: 5d6c9a82-8f87-41b2-a496-67b360302b76 on ip-10-1-50-208.ec2.internal:31010]
> {code}
> Apart from the fact the real error message is hidden, the issue is that we're trying
to cast the varchar to int ('test' to an int).  This seems to be because the projection out
of the scan when a field is not found becomes INT:OPTIONAL.
> The filter should not fail on this - if the varchar fails to convert to an int, the filter
should just simply not allow any records through.



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