presto-main/src/main/java/io/prestosql/sql/planner/LiteralInterpreter.java/LiteralVisitor/visitLiteral
class LiteralVisitor:        @Override
        protected Object visitLiteral(Literal node, ConnectorSession session)
        {
            throw new UnsupportedOperationException("Unhandled literal type: " + node);
        }