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Posted to issues@arrow.apache.org by "ASF GitHub Bot (Jira)" <ji...@apache.org> on 2019/09/26 12:29:00 UTC

[jira] [Updated] (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 ]

ASF GitHub Bot updated ARROW-6707:
----------------------------------
    Labels: pull-request-available  (was: )

> [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
>
> 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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