org.apache.flink.table.sinks

Interface RetractStreamTableSink<T>

Type Parameters:

T - Type of records that this TableSink expects and supports.

All Superinterfaces:

StreamTableSink<org.apache.flink.api.java.tuple.Tuple2<Boolean,T>>, org.apache.flink.table.sinks.TableSink<org.apache.flink.api.java.tuple.Tuple2<Boolean,T>>

@PublicEvolving
public interface RetractStreamTableSink<T>
extends StreamTableSink<org.apache.flink.api.java.tuple.Tuple2<Boolean,T>>

Defines an external TableSink to emit a streaming Table with insert, update, and delete changes.

The table will be converted into a stream of accumulate and retraction messages which are encoded as Tuple2. The first field is a Boolean flag to indicate the message type. The second field holds the record of the requested type T.

A message with true Boolean flag is an accumulate (or add) message.

A message with false flag is a retract message.

Method Summary

Modifier and Type	Method and Description
default org.apache.flink.api.common.typeinfo.TypeInformation<org.apache.flink.api.java.tuple.Tuple2<Boolean,T>>	getOutputType()
org.apache.flink.api.common.typeinfo.TypeInformation<T>	getRecordType() Returns the requested record type.

Methods inherited from interface org.apache.flink.table.sinks.StreamTableSink

consumeDataStream, emitDataStream

Methods inherited from interface org.apache.flink.table.sinks.TableSink

configure, getConsumedDataType, getFieldNames, getFieldTypes, getTableSchema

Method Detail

getRecordType

org.apache.flink.api.common.typeinfo.TypeInformation<T> getRecordType()

Returns the requested record type.

getOutputType

default org.apache.flink.api.common.typeinfo.TypeInformation<org.apache.flink.api.java.tuple.Tuple2<Boolean,T>> getOutputType()

Specified by:

getOutputType in interface org.apache.flink.table.sinks.TableSink<org.apache.flink.api.java.tuple.Tuple2<Boolean,T>>