Am Sa, 4.03.2017, 03:49 schrieb Nyall Dawson: >> I've loaded a PostgreSQL table with more than 3 * 10^6 entries. >> When accesing the attributes, QGIS downloads all the attributes! >> QGIS first gets instable and crashes afterwards. >> >> Actually, it would be more useful to download only the attributes, >> which are in the current view. >> >> [...] > > Yep - it's really annoying for large layers. If you go to settings -> > options -> data sources you can change "attribute table behaviour" to > "show features visible on map". That'll help a bit.
Thanks, I'll try it out soon. > I've got changes incoming which also improve the performance if you > have the "show selected features" option enabled > (https://github.com/qgis/QGIS/pull/4164). Another improvement would be to request the data in stages. Let's the attribute view shows 500 entries on each page. For shapefiles, sqlite and other database-like formats, it should work with OFFSET and LIMIT to minimize the amount of data being loaded: First page: SELECT * FROM xy OFFSET 0 LIMIT 500 Second page: SELECT * FROM xy OFFSET 500 LIMIT 500 etc. That's what many tools for databank manipulation do. Best regards, Tobias _______________________________________________ Qgis-user mailing list Qgis-user@lists.osgeo.org List info: https://lists.osgeo.org/mailman/listinfo/qgis-user Unsubscribe: https://lists.osgeo.org/mailman/listinfo/qgis-user
