On Dec 3, 2012, at 10:20 PM, Derek Harland wrote:

> The MSSQL dialect in 0.8.x seems to have had many of the reflection methods 
> changed from something like:
> 
>    @reflection.cache
>    def get_view_names(self, connection, schema=None, **kw):
> 
> to 
> 
>    @reflection.cache
>    @_db_plus_owner_listing
>    def get_view_names(self, connection, dbname, owner, schema, **kw):
> 
> where the decorator _db_plus_owner_listing is defined as:
> 
>    def _db_plus_owner_listing(fn):
>        def wrap(dialect, connection, schema=None, **kw):
>            dbname, owner = _owner_plus_db(dialect, schema)
>            return _switch_db(dbname, connection, fn, dialect, connection,
>                                dbname, owner, schema, **kw)
>        return update_wrapper(wrap, fn)
> 
> It seems that they are being extended so people can use schema in this 
> fashion: "<database>.<schema>"
> 
> This won't work as it stands.  Schemas are themselves allowed to contain a 
> ".", thus running any reflection on a schema "firstname.lastname" crashes (it 
> will try to switch to a database called "firstname" and inspect the schema 
> "lastname")

my understanding is that users are able to use this <dbname>.<schema>.<table> 
syntax directly in SQL server, is that correct?

In that case, how does SQL server make the distinction?

If the DB has:

database A -> schema B -> table C
database DEFAULT -> schema A.B -> table C

then what does SQL server consider "A.B.C" to mean ?










> 
> derek.
> 
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