Datalog aggregation attribute order not observed

IITDBGroup / gprom

GProM is a middleware that adds support for provenance to database backends.

Apache License 2.0

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Closed lordpretzel closed 2 years ago

lordpretzel commented 2 years ago

in Datalog, aggregation does not keep the attribute order as specified by the user

Q(sum(A),B) :- R(X,Y).

is turned into

Q(B,sum(A)) :- R(A,B).