presto-main/src/main/java/io/prestosql/sql/relational/SqlToRowExpressionTranslator.java/SqlToRowExpressionTranslator/visitDecimalLiteral
class SqlToRowExpressionTranslator:        @Override
        protected RowExpression visitDecimalLiteral(DecimalLiteral node, Void context)
        {
            DecimalParseResult parseResult = Decimals.parse(node.getValue());
            return constant(parseResult.getObject(), parseResult.getType());
        }