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Posted to issues@arrow.apache.org by "Liya Fan (Jira)" <ji...@apache.org> on 2019/09/26 12:20:00 UTC

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

Liya Fan created ARROW-6707:
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             Summary: [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


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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