[Qgis-developer] Sample

[Paolo Cavallini]

Il 15/07/2014 08:11, Nathan Woodrow ha scritto:

> Yeah I'm thinking it might just be slow for something like shapefile where is there
> no index on that column and it has to get each value to find the unique ones.  I'm
> not looking at the code, just guessing.

Thanks for your comments.
I found it rather slow for large PostGIS tables.
All the best.
-- 
Paolo Cavallini - www.faunalia.eu
Corsi QGIS e PostGIS: http://www.faunalia.eu/training.html