ALL variants of set operations not supported by Oracle and SQlite

IITDBGroup / gprom

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

http://www.cs.iit.edu/%7edbgroup/research/gprom.php

Apache License 2.0

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ALL variants of set operations not supported by Oracle and SQlite #65

Open lordpretzel opened 3 years ago

lordpretzel commented 3 years ago

Oracle and SQLite do not support INTERSECT ALL and EXCEPT ALL. To preserve GProM's bag semantics interpretation of these operations, we need to add a workaround to the serializers.