BuiltinOperators.SORT_DISTINCT_NODES_ASC_OR_ATOMICS.getFunctionIdentifier())
|| functionCall.getFunctionIdentifier().equals(
BuiltinOperators.DISTINCT_NODES_OR_ATOMICS.getFunctionIdentifier())) {
LogicalVariable groupByVariable = context.newVar();
ILogicalExpression nodeIdKeyVre = new VariableReferenceExpression(nodeIdKeyVariable);
GroupByOperator groupByOperator = getGroupByOperator(groupByVariable, nodeIdKeyVre);
groupByOperator.getInputs().add(nextOperatorRef);
nextOperatorRef = new MutableObject<ILogicalOperator>(groupByOperator);
}
// // Order.
// if (functionCall.getFunctionIdentifier().equals(