- Allow simple operators as supported by OGR (+, -, * )
- Only return a partial compilation success if expression contains
"column"="column2". Since OGR SQL performs case insensitive
comparisons, we need to double check the result using QGIS'
expressions to ensure that case matches. Add unit tests for this
to provider tests.
The postgres provider is modified so that layers with
TIN, PolyhedralSurface and Triangle geometries can be loaded.
Geometries are converted to MultiPolygons (and Polygons for Triangles).
The postgres test is completed to cover the loading of different types
of layers
Failure was caused by GDAL bug #6020, which has now been fixed
in GDAL. It turns out the values are only incorrect if the first
feature in the file has a null value, so I've rearranged the
features in the reference shapefile to avoid this.
