presto-main/src/main/java/io/prestosql/sql/planner/LiteralInterpreter.java/LiteralVisitor/visitDecimalLiteral
class LiteralVisitor:        @Override
        protected Object visitDecimalLiteral(DecimalLiteral node, ConnectorSession context)
        {
            return Decimals.parse(node.getValue()).getObject();
        }