[jira] [Created] (DRILL-3509) Empty JSON files trigger exception when used in a union

["Stefán Baxter (JIRA)" <ji...@apache.org>]

Stefán Baxter created DRILL-3509:
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             Summary: Empty JSON files trigger exception when used in a union
                 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: Stefán 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 this 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-3c4e-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 left/right position of the directory search if union is being called.



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