Technology Cafe

If S is a subtype of T, then objects of type T in a program may be replaced with objects of type S without altering any of the desirable properties of that

Sounds confusing? It sure does to me at least.

Here is an easier version

If you have sub-classed a given class- in that case any program that [...]

The error message

Named query not known: my.simple.query
    [junit] org.hibernate.MappingException: Named query not known: relationship.delete_by_userId
    [junit]  at org.hibernate.impl.AbstractSessionImpl.getNamedQuery(AbstractSessionImpl.java:93)
    [junit]  at org.hibernate.impl.SessionImpl.getNamedQuery(SessionImpl.java:1287)

The context

You are using a named query in your application. Named queries are externalized and are coded in the hibernate mapping files rather than the application code

Possible reason(s) for this error

1) The name of the query in [...]

I think open systems are very much like democracy.

And I would say i-Series is akin to a closed world society like a socialist country.

If you think about it- you will find that there are quite a few similarities between open systems and democracy.

Both are run by the people. Well to an extent - I guess. Finally [...]