Get the name of the most common data type which has type type.
The returned value may be null either if the provider does not implement that method, or if there is no DBMS data type which
could contain data of the g_type type (for example null may be returned if a DBMS has integers only up to 4
bytes and a INT64 is requested).
| this |
a server provider. |
| cnc |
a Connection object or |
| type |
a Type value type |
|
the name of the DBMS type, or |