@strk, I think this will not be able to open a URI like 'dbname=\'/tmp/test.sqlite\' table="test" (geometry) sql=', returning "invalid-uri", although "test" would be expected by anyone calling ogrLayerName.

ogrLayerName gets URIs from QGIS layers. Please fix this so I can send a PR that will hopefully enter into QGIS v2.18.