52b36ed9 - DRILL-2063: Fix is in Calcite (ensure uniqueness of fields in the row type of AggregateRel). Added unit test and bumped up calcite version to 0.9-drill-r18.
DRILL-2063: Fix is in Calcite (ensure uniqueness of fields in the row type of AggregateRel). Added unit test and bumped up calcite version to 0.9-drill-r18.
