presto-parser/src/main/java/io/prestosql/sql/ExpressionFormatter.java/ExpressionFormatter/visitDecimalLiteral
class ExpressionFormatter:        @Override
        protected String visitDecimalLiteral(DecimalLiteral node, Void context)
        {
            // TODO return node value without "DECIMAL '..'" when FeaturesConfig#parseDecimalLiteralsAsDouble switch is removed
            return "DECIMAL '" + node.getValue() + "'";
        }