[jira] [Commented] (DRILL-4919) Fix select count(1) / count(*) on csv with header

["ASF GitHub Bot (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/DRILL-4919?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15785693#comment-15785693 ] 

ASF GitHub Bot commented on DRILL-4919:
---------------------------------------

GitHub user arina-ielchiieva opened a pull request:

    https://github.com/apache/drill/pull/714

    DRILL-4919: Fix select count(1) / count(*) on csv with header

    When columns from file are not needed in result (`isSkipQuery = true`), empty list of columns is replaced for text files with `columns[0]`. But currently text files with headers do not support `columns` syntax, so for these type of files we need to replace empty list of columns with default named column.

You can merge this pull request into a Git repository by running:

    $ git pull https://github.com/arina-ielchiieva/drill DRILL-4919

Alternatively you can review and apply these changes as the patch at:

    https://github.com/apache/drill/pull/714.patch

To close this pull request, make a commit to your master/trunk branch
with (at least) the following in the commit message:

    This closes #714
    
----
commit c2d1e222fac64dc6c5b177c983a2e5b2d5227190
Author: Arina Ielchiieva <ar...@gmail.com>
Date:   2016-12-29T15:42:53Z

    DRILL-4919: Fix select count(1) / count(*) on csv with header

----


> Fix select count(1) / count(*) on csv with header
> -------------------------------------------------
>
>                 Key: DRILL-4919
>                 URL: https://issues.apache.org/jira/browse/DRILL-4919
>             Project: Apache Drill
>          Issue Type: Bug
>          Components: Functions - Drill
>    Affects Versions: 1.8.0
>            Reporter: F Méthot
>            Assignee: Arina Ielchiieva
>            Priority: Minor
>             Fix For: Future
>
>
> This happens since  1.8
> Dataset (I used extended char for display purpose) test.csvh:
> a,b,c,d\n
> 1,2,3,4\n
> 5,6,7,8\n
> Storage config:
> "csvh": {
>   "type": "text",
>   "extensions" : [
>       "csvh"
>    ],
>    "extractHeader": true,
>    "delimiter": ","
>   }
> select count(1) from dfs.`test.csvh`
> Error: UNSUPPORTED_OPERATION ERROR: With extractHeader enabled, only header names are supported
> coumn name columns
> column index
> Fragment 0:0



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