AggregateFunction (Snowpark Java API Reference 1.19.0)

java.lang.Object
- com.snowflake.snowpark_java.AggregateFunction

```
public class AggregateFunction
extends java.lang.Object
```
Encapsulates a user-defined aggregate function (UDAF) that is returned by UDAFRegistration.registerTemporary or UDAFRegistration.registerPermanent.
Use AggregateFunction.apply to generate Column expressions from an instance.
```
 AggregateFunction myAvg = session.udaf().registerTemporary("my_avg", new MyAvgUDAF());
 df.select(myAvg.apply(df.col("a")));
 
```
Since:

1.19.0

- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  Column apply(Column... exprs)
  Apply the UDAF to one or more columns to generate a Column expression.
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Method Detail
  - apply
```
public Column apply(Column... exprs)
```
    Apply the UDAF to one or more columns to generate a Column expression.
    
    Parameters:
    
    exprs - The list of column expressions to pass to the UDAF.
    
    Returns:
    
    The result column.
    
    Since:
    
    1.19.0