Il 15/07/2014 09:22, Jürgen E. Fischer ha scritto:

> As slow as
> 
> SELECT DISTINCT attribute FROM table ORDER BY attribute LIMIT 10

apparently yes - probably I had some additional slowdown.
sorry for the noise.
-- 
Paolo Cavallini - www.faunalia.eu
Corsi QGIS e PostGIS: http://www.faunalia.eu/training.html
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