I - input parameter typeR - input parameter typeU - output parameter type
the abstract class of the UDF2 function,
all udf2 functions must inherit this class and
implement all the abstract methods in the class.public abstract class UDF2<I,R,U> extends Object
| 限定符和类型 | 字段和说明 |
|---|---|
static String |
TRANS_METHOD |
| 构造器和说明 |
|---|
UDF2() |
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