In V4 you have GdaMetaStore to get columns and others db objects information. In order to get that information you have to do:
- Get a GdaMetaStore from a GdaConnnection using gda_connection_get_meta_store
- Update meta information gda_connection_update_meta_store
- Get columns information using gda_meta_store_extract and use GdaDataModel API to access to the required information
The required SQL to do it could be:
SELECT * FROM _columns WHERE table_schema = ##schema::string AND table_catalog = ##catalog::string AND table_name = ##table::string
For gda_column_get_scale you can use numeric_scale column; sorry but don't know about defined_size.
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