[Qgis-user] Auxillary storage fields and field calculator

[Martin]

Hi,

I have a postgis dataset that currently has sets of label x , y and rotations 
for different projects. Moving to QGIS 3 I would like to remove these fields 
and use auxillary storage instead. 
I have created the auxillary storage fields and I would like to use the field 
calculator to copy the data from the label_x fields in the potgis dataset into 
the new fields. When I try to "Update existing field" the auxillary storage 
fields are not listed. I can use them as inputs to an expression but not as 
outputs. 
I couldn't find this discussed so not sure if this is a known limitation.

Thanks for the help.

Martin