presto-main/src/main/java/io/prestosql/spi/expression/ConnectorExpressionTranslator.java/SqlToConnectorExpressionTranslator/visitDecimalLiteral
class SqlToConnectorExpressionTranslator:        @Override
        protected Optional<ConnectorExpression> visitDecimalLiteral(DecimalLiteral node, Void context)
        {
            return Optional.of(new Constant(Decimals.parse(node.getValue()).getObject(), typeOf(node)));
        }