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From "C.S. Nirmal J. Fernando (JIRA)" <j...@apache.org>
Subject [jira] Updated: (DERBY-3573) Argument checking for ResultSet.setFetchSize(int) is incorrect
Date Tue, 15 Feb 2011 03:15:57 GMT

     [ https://issues.apache.org/jira/browse/DERBY-3573?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel

C.S. Nirmal J. Fernando updated DERBY-3573:

    Attachment: derby-3573-a.diff

Attaching a diff! 
Is there a way to find test files related to this change?


> Argument checking for ResultSet.setFetchSize(int) is incorrect
> --------------------------------------------------------------
>                 Key: DERBY-3573
>                 URL: https://issues.apache.org/jira/browse/DERBY-3573
>             Project: Derby
>          Issue Type: Bug
>          Components: JDBC, Network Client
>    Affects Versions:,
>            Reporter: Dyre Tjeldvoll
>            Assignee: C.S. Nirmal J. Fernando
>            Priority: Minor
>              Labels: derby_triage10_8
>         Attachments: derby-3573-a.diff
> The requirement that the argument to ResultSet.setFetchSize(int) be less than Statement.getMaxRows()
was dropped in Java 6/JDBC 4, (it is not present in the Java 6 javadoc, but can still be seen
in the Java 5 javadoc).
> The reason why the client driver doesn't throw an exception in this case is because am.ResultSet
incorrectly checks against ResultSet.maxRows_ and NOT am.Statement.getMaxRows(). So when am.Statement.setMaxRows(int)
is called after a result set has already been created, am.ResultSet.setFechSize(int) will
check against a stale value.
> The question is what to do about this. The client driver clearly has a bug, but should
we fix it by duplicating the old behavior found in the embedded driver, or change both drivers
to comply with latest spec which allows any non-negative value as argument to ResultSet.setFetchSize(int)?

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