cubicweb #3223975 make GROUP_CONCAT not repeat elements [validation pending]

The GROUP_CONCAT aggregate function is basically ', '.join(input_list). I'd like it to not repeat values that appear multiple times in the input, something like ', '.join(set(input_list)). Hopefully nothing cares much about the order in which elements are aggregated?

prioritynormal
typeenhancement
done in3.18.0
load left0.000
closed by#73bd5012336f Make the GROUP_CONCAT aggregate function not repeat values (closes #3223975)
patchMake the GROUP_CONCAT aggregate function not repeat values (closes #3223975) [applied]