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Date: Fri, 17 Jul 2015 09:52:05 +0000 (UTC)
From: =?utf-8?Q?Stef=C3=A1n_Baxter_=28JIRA=29?= <jira@apache.org>
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Subject: [jira] [Created] (DRILL-3509) Empty JSON files trigger exception
 when used in a union
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Stef=C3=A1n Baxter created DRILL-3509:
------------------------------------

             Summary: Empty JSON files trigger exception when used in a uni=
on
                 Key: DRILL-3509
                 URL: https://issues.apache.org/jira/browse/DRILL-3509
             Project: Apache Drill
          Issue Type: Bug
          Components: Query Planning & Optimization
    Affects Versions: 1.1.0
            Reporter: Stef=C3=A1n Baxter
            Assignee: Jinfeng Ni


When the right hand side of a union is a directory search that involving an=
 empty json file (or a empty log file waiting for first log lines) causes t=
his exception:
{
  "errorMessage" : "PARSE ERROR: From line 1, column 564 to line 1, column =
574: Column 'occurred_at' not found in any table\n\n\n[Error Id: bef7370a-3=
c4e-4c35-8126-33c391ecb8ce on localhost:31010]"
}

where 'occurred_at' is the first column used/requested.

This works fine if no union is involved but it happens regardless of the le=
ft/right position of the directory search if union is being called.


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