presto-main/src/main/java/io/prestosql/sql/planner/ExpressionInterpreter.java/Visitor/isEqual
class Visitor:        private boolean isEqual(Object operand1, Type type1, Object operand2, Type type2)
        {
            return Boolean.TRUE.equals(invokeOperator(OperatorType.EQUAL, ImmutableList.of(type1, type2), ImmutableList.of(operand1, operand2)));
        }