[Qgis-user] relation_aggregate issue with virtual fields
Neumann, Andreas
a.neumann at carto.net
Mon Jun 26 07:26:15 PDT 2017
Hi,
I use a relation_aggregate expression with the following syntax:
relation_aggregate( relation:='Erdwärmesonden',
aggregate:='sum',expression:="anzahl_sonden")
In the output preview this works fine and I get an expected result,
however, if I use the same expression in a virtual field, I always get
NULL values.
Any idea why this happens?
Thanks,
Andreas
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