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Posted to issues@arrow.apache.org by "Micah Kornfield (Jira)" <ji...@apache.org> on 2019/11/14 05:51:00 UTC

[jira] [Resolved] (ARROW-6707) [Java] Improve the performance of JDBC adapters by using nullable information

     [ https://issues.apache.org/jira/browse/ARROW-6707?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Micah Kornfield resolved ARROW-6707.
------------------------------------
    Fix Version/s: 1.0.0
       Resolution: Fixed

Issue resolved by pull request 5508
[https://github.com/apache/arrow/pull/5508]

> [Java] Improve the performance of JDBC adapters by using nullable information
> -----------------------------------------------------------------------------
>
>                 Key: ARROW-6707
>                 URL: https://issues.apache.org/jira/browse/ARROW-6707
>             Project: Apache Arrow
>          Issue Type: Improvement
>          Components: Java
>            Reporter: Liya Fan
>            Assignee: Liya Fan
>            Priority: Minor
>              Labels: pull-request-available
>             Fix For: 1.0.0
>
>          Time Spent: 9h
>  Remaining Estimate: 0h
>
> JDBC meta data has a field that indicates if a column can contain null. We can make use of this information when transforming jdbc data to arrow vectors.
> In particular, if the column cannot have null, there is no need to call the JDBC API for each value to check if the last value is null. 
> This will improve the performance of transforming JDBC data to arrow vectors. 



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