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From "Lily Wei (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-5143) Remove unnecessary copying of the map in getTypeMap()
Date Mon, 21 Mar 2011 18:51:06 GMT

    [ https://issues.apache.org/jira/browse/DERBY-5143?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13009286#comment-13009286
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Lily Wei commented on DERBY-5143:
---------------------------------

Thank you so much, Knut. I run derby-5143-1a.diff patch for ConnectionTest test against JDBC
3.0 and JDBC 4.1. +1 for the patch.

> Remove unnecessary copying of the map in getTypeMap()
> -----------------------------------------------------
>
>                 Key: DERBY-5143
>                 URL: https://issues.apache.org/jira/browse/DERBY-5143
>             Project: Derby
>          Issue Type: Improvement
>          Components: JDBC
>    Affects Versions: 10.8.0.0
>            Reporter: Knut Anders Hatlen
>            Assignee: Knut Anders Hatlen
>            Priority: Minor
>         Attachments: derby-5143-1a.diff, getTypeMap-warning.diff
>
>
> The JDBC 4.0 Connection classes implement getTypeMap() by calling super.getTypeMap()
and copying the resulting map. This is done to prevent an unchecked compiler warning that
we would see if we simply returned super.getTypeMap() in this method. It would be cheaper
and simpler to return super.getTypeMap() and ignore the warning.

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