Re: [gnome-db] Introspection - DataModel structures

[Murray Cumming <murrayc murrayc com>]

On Fri, 2004-04-09 at 08:50, Vivien wrote:
> Yes, the number and type of columns returned for each schema should be the
> same for every provider (note that this is not yet the case and some work
> needs to be done on some of the providers).
> 
> The "format" of each returned data model for each schema is documented in
> libgda's doc (such as 
> http://www.gnome-db.org/docs/libgda/libgda-provider-class.html#LIBGDA-PROVIDER-GET-SCHEMA).

Are the types documented anywhere. For instance, when getting the
GDA_CONNECTION_SCHEMA_FIELDS, the field type column is of type
GDA_VALUE_TYPE_STRING, but I would expect it to be GDA_VALUE_TYPE_TYPE.

This looks like a bug to me.

> To cope with this problem in libmergeant (which uses get_schema a lot to
> build and maintain its dictionnary), I've created some functions which
> check that the returned data model in in the right "format" (see the
> mg_resultset_check_data_model() in mg-result-set.[ch ]).

Yes, looking at the use of that function, mergeant does seem to expect a
GDA_VALUE_TYPE_STRING, rather than a GDA_VALUE_TYPE_TYPE.

-- 
Murray Cumming
www.murrayc.com
murrayc murrayc com