[odb-users] modified polymorphism example trouble...

Burton, Craig crburton at tnsi.com
Thu May 31 13:21:45 EDT 2012

Hi Boris,

Thank you for your very rapid response and solution -- your fix works perfectly!


-----Original Message-----
From: Boris Kolpackov [mailto:boris at codesynthesis.com]
Sent: Thursday, May 31, 2012 6:19 AM
To: Burton, Craig
Cc: odb-users at codesynthesis.com
Subject: Re: [odb-users] modified polymorphism example trouble...

Hi Craig,

Burton, Craig <crburton at tnsi.com> writes:

> However, when I attempt to break the employee files into person.hxx,
> person.cxx, employee.hxx and employee.cxx, I see the same behavior
> as in my separate, static prototype.
> [...]
> /usr/local/odb/include/odb/oracle/simple-object-statements.hxx:396:38:
> error: 'odb::oracle::object_statements<T>::container_statement_cache_'
> has incomplete type

This is a bug in ODB. The container_statement_cache class is only
defined in the generated source file corresponding to an object
class. While this wasn't a problem before, now, with polymorphism
support, we need to reference object statements from different
classes in a hierarchy. And then this becomes a problem. Thanks
for reporting it!

I came up with a fix and prepared a test package for libodb-oracle:


I tested it with the modified polymorphism example as you described
and it works as expected. I am pretty sure it will work for your
application as well. Can you confirm this and then I will release
the official bug-fix.


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