对于decimal来说,scale和precision相等的情况下,整数部分的0要占一位length;scale为0的情况下没有小数点,length会少占一位。再考虑到unsigned,如果是无符号数,则length的计算中还不需要考虑符号位,又可以少占一位。为了处理这些逻辑,MySQL对应代码如下: inline uint32 my_decimal_precision_to_length_no_truncation(...
Problem You are trying to cast a value of one or greater as a DECIMAL using equal values for both precision and scale. A null value is returned instead of
int adjustedScale = HiveDecimal.MAX_PRECISION - intDigits;//38-整数位 adjustedScale = Math.max(adjustedScale, minScaleValue); // 两者取最大值 // 其实这里就是算小数位到底是多少。因为精度已经确定了就是38 return new DecimalTypeInfo(HiveDecimal.MAX_PRECISION, adjustedScale); } 1. 2. 3. 4....
Represents a numeric value between - 10^38 +1 and 10^38 - 1, with fixed precision and scale.
Use the decimal data type to store numbers with decimals when the data values must be stored exactly as specified. For more information about how mathematical operations affect the precision and scale of the result, seePrecision, Scale, and Length (Transact-SQL). ...
In aDECIMALcolumn declaration, the precision and scale can be (and usually is) specified. For example: salaryDECIMAL(5,2) In this example,5is the precision and2is the scale. The precision represents the number of significant digits that are stored for values, and the scale represents the nu...
Result scale e1 + e2 max(s1, s2) + max(p1-s1, p2-s2) + 1 max(s1, s2) e1 - e2 max(s1, s2) + max(p1-s1, p2-s2) + 1 max(s1, s2) e1 * e2 p1 + p2 + 1s1 + s2 e1 / e2 p1 - s1 + s2 + max(6, s1 + p2 + 1) max(6, s1 + p2 + 1) e1 % e2 min(p1-...
Convert decimal and numeric dataFor decimal and numeric data types, SQL Server considers each combination of precision and scale as a different data type. For example, decimal(5,5) and decimal(5,0) are considered different data types.
初始化 DecimalTypeMapping 类的新实例。 C# 复制 public DecimalTypeMapping (string storeType, System.Data.DbType? dbType = 7, int? precision = default, int? scale = default); 参数 storeType String 数据库类型的名称。 dbType Nullable<DbType> 要使用的 DbType。 precision Nullable<Int32> ...
Unfortunately your interpretation is not how the driver works and as shown in the example above you can set the scale and precision you desire using setScale. I do not agree with the response. Obviously, it is how the driver works, but I think it is not correct. In the example, you ...