'SELECT DISTINCT "column_id" FROM table_name' doesn't work with GDAL 1.8.0
|Reported by:||Even Rouault||Owned by:||Even Rouault|
This used to work with the old SQL parser, but doesn't with the new one. QGIS (1.5 and 1.6) uses escaping of the column name for the "unique value" symbology on a vector layer.
(this is not critical however since QGIS can fallback to its own implementation of SELECT DISTINCT that basically iterates over each feature)