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Posted to issues@drill.apache.org by "Arina Ielchiieva (Jira)" <ji...@apache.org> on 2020/03/23 09:13:00 UTC

[jira] [Updated] (DRILL-7641) Convert Excel Reader to Use Streaming Reader

     [ https://issues.apache.org/jira/browse/DRILL-7641?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Arina Ielchiieva updated DRILL-7641:
------------------------------------
    Fix Version/s:     (was: 1.18.0)

> Convert Excel Reader to Use Streaming Reader
> --------------------------------------------
>
>                 Key: DRILL-7641
>                 URL: https://issues.apache.org/jira/browse/DRILL-7641
>             Project: Apache Drill
>          Issue Type: Improvement
>          Components: Storage - Text &amp; CSV
>    Affects Versions: 1.17.0
>            Reporter: Charles Givre
>            Assignee: Charles Givre
>            Priority: Major
>
> The current implementation of the Excel reader uses the Apache POI reader, which uses excessive amounts of memory. As a result, attempting to read large Excel files will cause out of memory errors. 
> This PR converts the format plugin to use a streaming reader, based still on the POI library.  The documentation for the streaming reader can be found here. [1]
> All unit tests pass and I tested the plugin with some large Excel files on my computer.
> [1]: [https://github.com/pjfanning/excel-streaming-reader]
>  



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