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https://issues.apache.org/jira/browse/DERBY-5488?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13150605#comment-13150605
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Rick Hillegas commented on DERBY-5488:
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Thanks for that quick response, Knut. I think that a similar problem can arise
in earlier versions of Derby. For instance, if an application is compiled on
Java 6 to run at JVM level 1.5 and the application tries to call a JDBC 4.0
method which we implemented in our JDBC 3.0 drivers. If the application were
compiled against the JDBC 3.0 libraries (as we do in our Derby builds) then the
error would have been caught at compile-time, not run-time. And a solution in
both cases is to use reflection to access the methods which don't appear in the
older JVM. I tend to think that this is an error on the part of the programmer,
not Derby. The programmer is trying to do something that can't work and they
have tricked the compiler into not helping them detect this early on.
However, we are certainly in the confusing space which Bryan is talking about.
> Add remaining JDBC 4.1 bits which did not appear in the Java 7 javadoc.
> -----------------------------------------------------------------------
>
> Key: DERBY-5488
> URL: https://issues.apache.org/jira/browse/DERBY-5488
> Project: Derby
> Issue Type: Improvement
> Components: JDBC, SQL
> Affects Versions: 10.9.0.0
> Reporter: Rick Hillegas
> Assignee: Rick Hillegas
> Attachments: JDBC_4.1_Supplement.html,
> derby-5488-01-aa-objectMappingAndConversion.diff,
> derby-5488-02-aa-fixBigInteger.diff,
> derby-5488-03-ac-moveDecimalSetterGetterAndTest.diff,
> derby-5488-04-aa-fixBigIntegerDecimal.diff,
> derby-5488-05-ad-limitOffset.diff, derby-5488-06-aa-limitOffsetTests.diff,
> derby-5488-07-aa-booleanObjects.diff,
> derby-5488-08-aa-extraLimitOffsetTest.diff,
> derby-5488-09-aa-jdbcMinorVersion.diff, z.java
>
>
> In addition to the JDBC 4.1 bits which were visible in the Java 7 javadoc, a
> couple other items appear in the JDBC 4.1 Maintenance Review spec. This spec
> has been published on the JCP website at
> http://download.oracle.com/otndocs/jcp/jdbc-4_1-mrel-eval-spec/index.html. I
> will attach a functional spec for the remaining bits.
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