[Qgis-developer] Performance for selection on attribute table

Régis Haubourg regis.haubourg at eau-adour-garonne.fr
Wed Mar 27 12:57:07 PDT 2013


Hi dev's, I was notified some performance matters when dealing with
selections in attribute tables, by some users swithcing from arcgis to QGIS. 
Indexes of datasource seem to be ignored for SQL selection and search. This
leads to very slow selections when dealing with large datasets. 
Anyone confirms?  Is it really related to indexes or another bottleneck? 
Is there any possible improvement ? Are providers working on selections or
is that all dealing with cache? 

Thanks for your feedback , 
Régis



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