spark ArrowPythonRunner 源码
spark ArrowPythonRunner 代码
文件路径：/sql/core/src/main/scala/org/apache/spark/sql/execution/python/ArrowPythonRunner.scala
/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.spark.sql.execution.python
import org.apache.spark.api.python._
import org.apache.spark.sql.catalyst.InternalRow
import org.apache.spark.sql.internal.SQLConf
import org.apache.spark.sql.types._
import org.apache.spark.sql.vectorized.ColumnarBatch
/**
* Similar to `PythonUDFRunner`, but exchange data with Python worker via Arrow stream.
*/
class ArrowPythonRunner(
funcs: Seq[ChainedPythonFunctions],
evalType: Int,
argOffsets: Array[Array[Int]],
protected override val schema: StructType,
protected override val timeZoneId: String,
protected override val workerConf: Map[String, String])
extends BasePythonRunner[Iterator[InternalRow], ColumnarBatch](funcs, evalType, argOffsets)
with BasicPythonArrowInput
with BasicPythonArrowOutput {
override val simplifiedTraceback: Boolean = SQLConf.get.pysparkSimplifiedTraceback
override val bufferSize: Int = SQLConf.get.pandasUDFBufferSize
require(
bufferSize >= 4,
"Pandas execution requires more than 4 bytes. Please set higher buffer. " +
s"Please change '${SQLConf.PANDAS_UDF_BUFFER_SIZE.key}'.")
}
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