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https://issues.apache.org/jira/browse/DERBY-4961?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12979399#action_12979399
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Knut Anders Hatlen commented on DERBY-4961:
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I don't think this is a bug. The API documentation at
http://db.apache.org/derby/javadoc/publishedapi/jdbc4/org/apache/derby/tools/sysinfo.html#getMajorVersion()
says that it should return the version number of the embedded driver:
public static int getMajorVersion()
gets the major version of the Apache Derby embedded code.
Returns:
the major version. Returns -1 if not found.
So what you observe seems to be consistent with the documented behaviour.
The supported ways to get the version of the client driver are:
1) Use the getDriverMajorVersion() and getDriverMinorVersion() methods in
java.sql.DatabaseMetaData.
2) Call the variants of sysinfo.getMajorVersion() and sysinfo.getMinorVersion()
that take a String argument. The argument should be the value found in the
constant sysinfo.CLIENT.
> org.apache.derby.tools.sysinfo return wrong minor & major versions if
> ClientDriver is used
> ------------------------------------------------------------------------------------------
>
> Key: DERBY-4961
> URL: https://issues.apache.org/jira/browse/DERBY-4961
> Project: Derby
> Issue Type: Bug
> Components: Network Client
> Affects Versions: 10.7.1.1
> Reporter: Juraj Burian
>
> I am not sure that this is a bug.
> Hibernate uses code like this:
> final Class sysinfoClass = ReflectHelper.classForName(
> "org.apache.derby.tools.sysinfo", this.getClass() );
> final Method majorVersionGetter =
> sysinfoClass.getMethod( "getMajorVersion", ReflectHelper.NO_PARAM_SIGNATURE );
> final Method minorVersionGetter =
> sysinfoClass.getMethod( "getMinorVersion", ReflectHelper.NO_PARAM_SIGNATURE );
> driverVersionMajor = ( (Integer)
> majorVersionGetter.invoke( null, ReflectHelper.NO_PARAMS ) ).intValue();
> driverVersionMinor = ( (Integer)
> minorVersionGetter.invoke( null, ReflectHelper.NO_PARAMS ) ).intValue();
> The problem is that if ClientDriver is used, this code returns -1, -1 instead
> of correct version numbers.
> Hibernate checks versions and if not correct numbers returned, then exception
> is raised (versions are checked when sequence is used - so it is new feature
> for both of sides :-) )
> I tried test this by hands and achieved the same behavior.
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