> To solve the issue of several geometry fields we also need a (optional) > > > parameter with the geometry column name. > > subLayers() will send the layer name in the 'table_name(field_name)' format > > It was only with gdal 1 that GDALDatasetGetLayerByName could not use that > format. > That means the 'table_name(field_name)' format can always be used.
table_name(field_name) is only valid as a OGR layer name for the SQLite driver and this is a legacy behaviour of the GDAL 1 era. That will *not* work for other formats that can have multiple geometry fields, like GML. We could potentially use it as a QGIS layername, but it would probably be cleaner to have a dedicated URI parameter for the geometry column name. Anyway at the OGR API level, I reiterate that we must have a separate OGR layer name (for GetLayerByname()) and OGR geometry field name (for GetGeomFieldIndex()) -- Spatialys - Geospatial professional services http://www.spatialys.com
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