[jira] [Commented] (DRILL-7723) Add Excel Metadata as Implicit Fields

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

    [ https://issues.apache.org/jira/browse/DRILL-7723?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17108733#comment-17108733 ] 

ASF GitHub Bot commented on DRILL-7723:
---------------------------------------

vvysotskyi commented on pull request #2069:
URL: https://github.com/apache/drill/pull/2069#issuecomment-629542378


   @cgivre, will these "implicit" columns values be populated (but not returned) every time the file is read even they aren't specified in the query?


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> Add Excel Metadata as Implicit Fields
> -------------------------------------
>
>                 Key: DRILL-7723
>                 URL: https://issues.apache.org/jira/browse/DRILL-7723
>             Project: Apache Drill
>          Issue Type: Improvement
>          Components: Metadata, Storage - Text & CSV
>    Affects Versions: 1.17.0
>            Reporter: Charles Givre
>            Assignee: Charles Givre
>            Priority: Major
>             Fix For: 1.18.0
>
>
> Excel files contain a significant number of metadata fields in them. This PR adds the ability to access these fields via implicit columns. The columns are:
> _category
> _content_status
> _content_type;
> _creator
> _description
> _identifier
> _keywords
> _last_modified_by_user
> _revision
> _subject
> _title
> _created
> _last_printed
> _modified
> These fields are not projected in star queries so there is no effect on existing queries.
>  



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