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From "Paul Rogers (JIRA)" <j...@apache.org>
Subject [jira] [Created] (DRILL-5554) Wrong error type for "SELECT a" from a CSV file without headers
Date Mon, 29 May 2017 23:28:04 GMT
Paul Rogers created DRILL-5554:
----------------------------------

             Summary: Wrong error type for "SELECT a" from a CSV file without headers
                 Key: DRILL-5554
                 URL: https://issues.apache.org/jira/browse/DRILL-5554
             Project: Apache Drill
          Issue Type: Bug
    Affects Versions: 1.10.0
            Reporter: Paul Rogers
            Priority: Trivial


Create a CSV file without headers:

{code}
10,foo,bar
{code}

Use a CSV storage plugin configured to not skip the first line and not read headers.

Then, issue the following query:

{code}
SELECT a FROM `dfs.data.example.csv`
{code}

The result is correct: an error:

{code}
org.apache.drill.common.exceptions.UserRemoteException: 
DATA_READ ERROR: Selected column 'a' must have name 'columns' or must be plain '*'
{code}

But, the type of error is wrong. This is not a data read error: the file read just fine. The
problem is a semantic error: a query form that is not compatible wth the storage plugin.

Suggest using {{UserException.unsupportedError()}} instead since the user is asking the plugin
to do something that the plugin does not support.



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