Add qgis:postgisexecuteandloadsql

Author: anitagraser

python/plugins/processing/algs/help/qgis.yaml

@@ -356,6 +356,9 @@ qgis:spatialiteexecutesql: >
 qgis:postgisexecutesql: >
   This algorithm performs a SQL database query on a PostGIS database connected to QGIS.
 
+qgis:postgisexecuteandloadsql: >
+  This algorithm performs a SQL database query on a PostGIS database connected to QGIS and loads the query results as a new layer.
+
 qgis:randomextract: >
   This algorithm takes a vector layer and generates a new one that contains only a subset of the features in the input layer.