DropUpdateBeforeFunction (Flink : 2.0-SNAPSHOT API)

java.lang.Object
- org.apache.flink.table.runtime.operators.misc.DropUpdateBeforeFunction

All Implemented Interfaces:

Serializable, FilterFunction<RowData>, Function
```
public class DropUpdateBeforeFunction
extends Object
implements FilterFunction<RowData>
```
A function drops only rows with RowKind.UPDATE_BEFORE changelog kind. This is usually used as an optimization for the downstream operators that doesn't need the RowKind.UPDATE_BEFORE messages, but the upstream operator can't drop it by itself.

See Also:

Serialized Form

- Constructor Summary
  
  Constructors
  Constructor Description
  
  DropUpdateBeforeFunction()
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  boolean filter(RowData value)
  The filter function that evaluates the predicate.
  - Methods inherited from class java.lang.Object
    clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Constructor Detail
  - DropUpdateBeforeFunction
```
public DropUpdateBeforeFunction()
```
- Method Detail
  - filter
```
public boolean filter(RowData value)
```
    Description copied from interface: FilterFunction
    
    The filter function that evaluates the predicate.
    IMPORTANT: The system assumes that the function does not modify the elements on which the predicate is applied. Violating this assumption can lead to incorrect results.
    
    Specified by:
    
    filter in interface FilterFunction<RowData>
    
    Parameters:
    
    value - The value to be filtered.
    
    Returns:
    
    True for values that should be retained, false for values to be filtered out.