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Are there some limitations in feature number, while making spatial query in QGIS?

All my data is in PostGIS format. When testing with a small amount of features, it works perfectly, but with 1032862 polygon features only this error message returned.

Uncaught error while executing algorithm Traceback (most recent call last): File "C:/PROGRA~1/QGIS2~1.18/apps/qgis/./python/plugins\processing\core\GeoAlgorithm.py", line 203, in execute self.processAlgorithm(progress) File "C:/PROGRA~1/QGIS2~1.18/apps/qgis/./python/plugins\processing\algs\qgis\SelectByLocation.py", line 94, in processAlgorithm index = vector.spatialindex(inputLayer) File "C:/PROGRA~1/QGIS2~1.18/apps/qgis/./python/plugins\processing\tools\vector.py", line 220, in spatialindex idx = QgsSpatialIndex(layer.getFeatures(request)) Exception: unknown

  • Check the geometry validity of the layers... Vector > Geometry Tools > Check Validity – firefly-orange Jan 4 '18 at 12:54
  • Did you perhaps try to perform the query purely through sql? – U2ros Jan 4 '18 at 13:37
  • not yet, will try soon. – Irakli Ugulava Jan 4 '18 at 16:54
  • Just check the geometry, there were many errors, correct almost all of them, but still have 3 errors, with "Unknown geometry type 0" message and located on 0,0 coordinate. I Don't know how to correct it. – Irakli Ugulava Jan 4 '18 at 18:06
  • already correct all geometry errors, but same result :( – Irakli Ugulava Jan 4 '18 at 19:02

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