presto-main/src/main/java/io/prestosql/sql/analyzer/StatementAnalyzer.java/Visitor/visitIntersect
class Visitor:        @Override
        protected Scope visitIntersect(Intersect node, Optional<Scope> scope)
        {
            if (!node.isDistinct()) {
                throw semanticException(NOT_SUPPORTED, node, "INTERSECT ALL not yet implemented");
            }

            return visitSetOperation(node, scope);
        }