The OSGeo FDO provider for PostgreSQL/PostGIS has 32-bit and 64-bit versions on Windows and Linux. For AutoCAD Map 3D, it is certified for PostGIS 1.5 with PostgreSQL 9.0.
To bring in features from PostgreSQL/PostGIS
The service name is set when you install the PostgreSQL server.
To select from a list of data stores, click the down arrow. AutoCAD Map 3D connects to the specified server and instance and lists the available data stores.
If this feature source contains only a single feature class, that feature class is selected automatically. If it contains multiple feature classes, you can do either of the following:
If a feature class contains multiple geometry types,and you select the feature class itself, all geometries are added. To add a subset of geometries, hold your cursor over the feature class name to see the Show Geometry button. Click Show Geometry to see each geometry as a separate choice. Select the ones you want. Each selected geometry is added to map as a separate Display Manager layer.