sharpetronics/QGIS
1
0
Fork 0
mirror of https://github.com/qgis/QGIS.git synced 2025-12-04 00:06:46 -05:00
Code Issues Packages Projects Releases Wiki Activity

Short-circuit for empty layers

Browse Source
This commit is contained in:
uclaros 2021-10-25 17:30:13 +03:00 committed by Nyall Dawson
parent de44380637
commit 7b5cd9bcd3
1 changed files with 10 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

12
src/analysis/processing/qgsalgorithmextractbylocation.cpp
View File

@ -83,9 +83,17 @@ void QgsLocationBasedAlgorithm::process( const QgsProcessingContext &context, Qg
QgsProcessingFeedback *feedback,
const QgsFeatureIds &skipTargetFeatureIds )
{
// skip if there are no features to select from!
if ( targetSource->featureCount() == 0 )
return;
if ( targetSource->featureCount() > 0 && intersectSource->featureCount() > 0
&& targetSource->featureCount() < intersectSource->featureCount() )
// skip if intersect layer is empty, unless we are looking for disjoints
if ( intersectSource->featureCount() == 0 &&
!selectedPredicates.contains( Disjoint ) )
return;
if ( targetSource->featureCount() > 0 && intersectSource->featureCount() > 0 &&
targetSource->featureCount() < intersectSource->featureCount() )
{
// joining FEWER features to a layer with MORE features. So we iterate over the FEW features and find matches from the MANY
processByIteratingOverTargetSource( context, targetSource, intersectSource,