presto-main/src/main/java/io/prestosql/sql/planner/optimizations/ImplementIntersectAndExceptAsUnion.java/ImplementIntersectAndExceptAsUnion/addFilterForIntersect
class ImplementIntersectAndExceptAsUnion:        private FilterNode addFilterForIntersect(AggregationNode aggregation)
        {
            ImmutableList<Expression> predicates = aggregation.getAggregations().keySet().stream()
                    .map(column -> new ComparisonExpression(GREATER_THAN_OR_EQUAL, column.toSymbolReference(), new GenericLiteral("BIGINT", "1")))
                    .collect(toImmutableList());
            return new FilterNode(idAllocator.getNextId(), aggregation, ExpressionUtils.and(predicates));
        }