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From "Rick Hillegas (JIRA)" <j...@apache.org>
Subject [jira] Created: (DERBY-4637) The Developer's Guide implies that, for in-memory database names, Derby does not resolve relative and absolute paths to the same in-memory database
Date Fri, 30 Apr 2010 18:42:54 GMT
The Developer's Guide implies that, for in-memory database names, Derby does not resolve relative
and absolute paths to the same in-memory database
---------------------------------------------------------------------------------------------------------------------------------------------------

                 Key: DERBY-4637
                 URL: https://issues.apache.org/jira/browse/DERBY-4637
             Project: Derby
          Issue Type: Bug
          Components: Documentation
    Affects Versions: 10.6.1.0
            Reporter: Rick Hillegas


The Developer's Guide says in the section titled 'Conventions for specifying the database
path':

"When accessing databases from the file system (instead of from memory, the classpath, or
a jar file), any path that is not absolute is interpreted as relative to the system directory."

A casual reader might interpret this to mean that the system directory is not used to resolve
paths in the names of in-memory databases. But, in fact, Derby does use the system directory
to qualify relative paths in the names of in-memory databases.

For instance, if the system directory is /Users/blah/derby/dummy, then Derby treats the following
 urls as identifiers for the same in-memory database:

jdbc:derby:memory:db
jdbc:derby:memory:/Users/blah/derby/dummy/db

Similarly, Derby treats the following urls as names for the same in-memory database:

jdbc:derby:memory:/foo/bar/db
jdbc:derby:memory:/foo/bar/../bar/db

The Developer's Guide could use a section on how to resolve in-memory database names.



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