org.apache.flink.table.runtime.operators.python.scalar

Class PythonScalarFunctionOperator

java.lang.Object

org.apache.flink.streaming.api.operators.AbstractStreamOperator<OUT>

org.apache.flink.streaming.api.operators.python.AbstractPythonFunctionOperator<OUT>

org.apache.flink.streaming.api.operators.python.process.AbstractExternalPythonFunctionOperator<OUT>

org.apache.flink.table.runtime.operators.python.AbstractOneInputPythonFunctionOperator<IN,OUT>

org.apache.flink.table.runtime.operators.python.AbstractStatelessFunctionOperator<RowData,RowData,RowData>

org.apache.flink.table.runtime.operators.python.scalar.AbstractPythonScalarFunctionOperator

org.apache.flink.table.runtime.operators.python.scalar.PythonScalarFunctionOperator

All Implemented Interfaces:

Serializable, CheckpointListener, BoundedOneInput, Input<RowData>, KeyContext, KeyContextHandler, OneInputStreamOperator<RowData,RowData>, SetupableStreamOperator<RowData>, StreamOperator<RowData>, StreamOperatorStateHandler.CheckpointedStreamOperator, YieldingOperator<RowData>

@Internal
public class PythonScalarFunctionOperator
extends AbstractPythonScalarFunctionOperator

The Python ScalarFunction operator.

See Also:

Serialized Form

Field Summary

Fields inherited from class org.apache.flink.table.runtime.operators.python.scalar.AbstractPythonScalarFunctionOperator

reuseJoinedRow, rowDataWrapper, scalarFunctions

Fields inherited from class org.apache.flink.table.runtime.operators.python.AbstractStatelessFunctionOperator

bais, baisWrapper, baos, baosWrapper, forwardedInputQueue, inputType, udfInputType, udfOutputType

Fields inherited from class org.apache.flink.streaming.api.operators.python.process.AbstractExternalPythonFunctionOperator

pythonFunctionRunner

Fields inherited from class org.apache.flink.streaming.api.operators.python.AbstractPythonFunctionOperator

bundleFinishedCallback, config, elementCount, lastFinishBundleTime, maxBundleSize, systemEnvEnabled

Fields inherited from class org.apache.flink.streaming.api.operators.AbstractStreamOperator

chainingStrategy, lastRecordAttributes1, lastRecordAttributes2, latencyStats, LOG, metrics, output, processingTimeService, stateHandler, stateKeySelector1, stateKeySelector2, timeServiceManager

Constructor Summary

Constructors

Constructor and Description
PythonScalarFunctionOperator(Configuration config, PythonFunctionInfo[] scalarFunctions, RowType inputType, RowType udfInputType, RowType udfOutputType, GeneratedProjection udfInputGeneratedProjection, GeneratedProjection forwardedFieldGeneratedProjection)

Method Summary

Modifier and Type	Method and Description
FlinkFnApi.CoderInfoDescriptor	createInputCoderInfoDescriptor(RowType runnerInputType)
FlinkFnApi.CoderInfoDescriptor	createOutputCoderInfoDescriptor(RowType runnerOutType)
void	emitResult(Tuple3<String,byte[],Integer> resultTuple) Sends the execution result to the downstream operator.
void	open() This method is called immediately before any elements are processed, it should contain the operator's initialization logic, e.g. state initialization.
void	processElementInternal(RowData value)

Methods inherited from class org.apache.flink.table.runtime.operators.python.scalar.AbstractPythonScalarFunctionOperator

bufferInput, createUserDefinedFunctionsProto, getFunctionInput, getFunctionUrn, getPythonEnv

Methods inherited from class org.apache.flink.table.runtime.operators.python.AbstractStatelessFunctionOperator

createPythonFunctionRunner, processElement

Methods inherited from class org.apache.flink.table.runtime.operators.python.AbstractOneInputPythonFunctionOperator

endInput

Methods inherited from class org.apache.flink.streaming.api.operators.python.process.AbstractExternalPythonFunctionOperator

close, createPythonEnvironmentManager, emitResults, invokeFinishBundle

Methods inherited from class org.apache.flink.streaming.api.operators.python.AbstractPythonFunctionOperator

checkInvokeFinishBundleByCount, finish, getConfiguration, getFlinkMetricContainer, isBundleFinished, prepareSnapshotPreBarrier, processWatermark, setCurrentKey

Methods inherited from class org.apache.flink.streaming.api.operators.AbstractStreamOperator

getChainingStrategy, getContainingTask, getCurrentKey, getExecutionConfig, getInternalTimerService, getKeyedStateBackend, getKeyedStateStore, getMetricGroup, getOperatorConfig, getOperatorID, getOperatorName, getOperatorStateBackend, getOrCreateKeyedState, getPartitionedState, getPartitionedState, getProcessingTimeService, getRuntimeContext, getStateKeySelector1, getStateKeySelector2, getTimeServiceManager, getUserCodeClassloader, hasKeyContext1, hasKeyContext2, initializeState, initializeState, isUsingCustomRawKeyedState, notifyCheckpointAborted, notifyCheckpointComplete, processLatencyMarker, processLatencyMarker1, processLatencyMarker2, processRecordAttributes, processRecordAttributes1, processRecordAttributes2, processWatermark1, processWatermark2, processWatermarkStatus, processWatermarkStatus1, processWatermarkStatus2, reportOrForwardLatencyMarker, setChainingStrategy, setKeyContextElement1, setKeyContextElement2, setMailboxExecutor, setProcessingTimeService, setup, snapshotState, snapshotState, useSplittableTimers

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.flink.streaming.api.operators.OneInputStreamOperator

setKeyContextElement

Methods inherited from interface org.apache.flink.streaming.api.operators.StreamOperator

close, finish, getMetricGroup, getOperatorAttributes, getOperatorID, initializeState, prepareSnapshotPreBarrier, setKeyContextElement1, setKeyContextElement2, snapshotState

Methods inherited from interface org.apache.flink.api.common.state.CheckpointListener

notifyCheckpointAborted, notifyCheckpointComplete

Methods inherited from interface org.apache.flink.streaming.api.operators.KeyContext

getCurrentKey, setCurrentKey

Methods inherited from interface org.apache.flink.streaming.api.operators.Input

processLatencyMarker, processRecordAttributes, processWatermark, processWatermarkStatus

Methods inherited from interface org.apache.flink.streaming.api.operators.KeyContextHandler

hasKeyContext

Constructor Detail

PythonScalarFunctionOperator

public PythonScalarFunctionOperator(Configuration config,
                                    PythonFunctionInfo[] scalarFunctions,
                                    RowType inputType,
                                    RowType udfInputType,
                                    RowType udfOutputType,
                                    GeneratedProjection udfInputGeneratedProjection,
                                    GeneratedProjection forwardedFieldGeneratedProjection)

Method Detail

open

public void open()
          throws Exception

Description copied from class: AbstractStreamOperator

This method is called immediately before any elements are processed, it should contain the operator's initialization logic, e.g. state initialization.

The default implementation does nothing.

Specified by:

open in interface StreamOperator<RowData>

Overrides:

open in class AbstractPythonScalarFunctionOperator

Throws:

Exception - An exception in this method causes the operator to fail.

createInputCoderInfoDescriptor

public FlinkFnApi.CoderInfoDescriptor createInputCoderInfoDescriptor(RowType runnerInputType)

Specified by:

createInputCoderInfoDescriptor in class AbstractStatelessFunctionOperator<RowData,RowData,RowData>

createOutputCoderInfoDescriptor

public FlinkFnApi.CoderInfoDescriptor createOutputCoderInfoDescriptor(RowType runnerOutType)

Specified by:

createOutputCoderInfoDescriptor in class AbstractStatelessFunctionOperator<RowData,RowData,RowData>

processElementInternal

public void processElementInternal(RowData value)
                            throws Exception

Specified by:

processElementInternal in class AbstractStatelessFunctionOperator<RowData,RowData,RowData>

Throws:

Exception

emitResult

public void emitResult(Tuple3<String,byte[],Integer> resultTuple)
                throws IOException

Description copied from class: AbstractExternalPythonFunctionOperator

Sends the execution result to the downstream operator.

Specified by:

emitResult in class AbstractExternalPythonFunctionOperator<RowData>

Throws:

IOException