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

• Type: Improvement
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 0.16.0
• Component/s: Java
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/23052
• Assignee: Liya Fan
• Reporter: Liya Fan
• Created: 26/Sep/19 12:19
• Updated: 11/Jan/23 07:48
• Resolved: 14/Nov/19 05:50

Description

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.

Issue Links

• links to: GitHub Pull Request #5508