org.apache.flink.table.runtime.operators.misc

Class DropUpdateBeforeFunction

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 and Description
DropUpdateBeforeFunction()

Method Summary

Modifier and Type	Method and 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.