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[SPARK-4131][SQL] support writing data into the filesystem from queries #4380
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8eb85e1
support writing data into the filesystem from queries
scwf 9aa4b84
remove imports
scwf 48fe663
fix merge conflicts
scwf d485beb
make WriteToDirectory extends command
scwf 48d633e
style
scwf ae1af0a
fix conflicts
scwf 9f0fdb5
compile fix
scwf e6ade74
fix saveashfile
scwf 1faa6c4
fix comments
scwf 7dc9272
update and fix conflicts
scwf 33a2b0a
compile fix accordng to new changes of inernalrow
scwf 438a209
conflics fix
scwf b049e3a
compile
scwf 085e427
Merge branch 'master' of https://github.com/apache/spark into write-dir
scwf c6f4b4b
merge bug fix
scwf cc1172e
Merge branch 'master' into write-dir
scwf 9cc8474
fix write path
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101 changes: 101 additions & 0 deletions
101
sql/hive/src/main/scala/org/apache/spark/sql/hive/SaveAsHiveFile.scala
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/* | ||
* 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. | ||
*/ | ||
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package org.apache.spark.sql.hive | ||
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import scala.collection.JavaConversions._ | ||
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import org.apache.hadoop.hive.ql.plan.TableDesc | ||
import org.apache.hadoop.hive.serde2.Serializer | ||
import org.apache.hadoop.mapred.{FileOutputFormat, JobConf} | ||
import org.apache.hadoop.hive.serde2.objectinspector.{StructObjectInspector, ObjectInspectorUtils} | ||
import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspectorUtils.ObjectInspectorCopyOption | ||
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import org.apache.spark.rdd.RDD | ||
import org.apache.spark.sql.catalyst.InternalRow | ||
import org.apache.spark.util.SerializableJobConf | ||
import org.apache.spark.sql.types.StructType | ||
import org.apache.spark.sql.types.DataType | ||
import org.apache.spark.sql.hive.HiveShim.{ShimFileSinkDesc => FileSinkDesc} | ||
import org.apache.spark.{Logging, SparkContext, TaskContext} | ||
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/** | ||
* A trait for subclasses that write data using arbitrary SerDes to a file system . | ||
*/ | ||
private[hive] trait SaveAsHiveFile extends HiveInspectors with Logging { | ||
def newSerializer(tableDesc: TableDesc): Serializer = { | ||
val serializer = tableDesc.getDeserializerClass.newInstance().asInstanceOf[Serializer] | ||
serializer.initialize(null, tableDesc.getProperties) | ||
serializer | ||
} | ||
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def saveAsHiveFile( | ||
sparkContext: SparkContext, | ||
rdd: RDD[InternalRow], | ||
schema: StructType, | ||
dataTypes: Array[DataType], | ||
valueClass: Class[_], | ||
fileSinkConf: FileSinkDesc, | ||
conf: SerializableJobConf, | ||
writerContainer: SparkHiveWriterContainer): Unit = { | ||
assert(valueClass != null, "Output value class not set") | ||
conf.value.setOutputValueClass(valueClass) | ||
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val outputFileFormatClassName = fileSinkConf.getTableInfo.getOutputFileFormatClassName | ||
assert(outputFileFormatClassName != null, "Output format class not set") | ||
conf.value.set("mapred.output.format.class", outputFileFormatClassName) | ||
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FileOutputFormat.setOutputPath( | ||
conf.value, | ||
SparkHiveWriterContainer.createPathFromString(fileSinkConf.getDirName, conf.value)) | ||
log.debug("Saving as hadoop file of type " + valueClass.getSimpleName) | ||
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writerContainer.driverSideSetup() | ||
sparkContext.runJob(rdd, writeToFile _) | ||
writerContainer.commitJob() | ||
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// Note that this function is executed on executor side | ||
def writeToFile(context: TaskContext, iterator: Iterator[InternalRow]): Unit = { | ||
val serializer = newSerializer(fileSinkConf.getTableInfo) | ||
val standardOI = ObjectInspectorUtils | ||
.getStandardObjectInspector( | ||
fileSinkConf.getTableInfo.getDeserializer.getObjectInspector, | ||
ObjectInspectorCopyOption.JAVA) | ||
.asInstanceOf[StructObjectInspector] | ||
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val fieldOIs = standardOI.getAllStructFieldRefs.map(_.getFieldObjectInspector).toArray | ||
val wrappers = fieldOIs.zip(dataTypes).map { case (f, dt) => wrapperFor(f, dt)} | ||
val outputData = new Array[Any](fieldOIs.length) | ||
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writerContainer.executorSideSetup(context.stageId, context.partitionId, context.attemptNumber) | ||
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iterator.foreach { row => | ||
var i = 0 | ||
while (i < fieldOIs.length) { | ||
outputData(i) = if (row.isNullAt(i)) null else wrappers(i)(row.get(i, dataTypes(i))) | ||
i += 1 | ||
} | ||
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writerContainer | ||
.getLocalFileWriter(row, schema) | ||
.write(serializer.serialize(outputData, standardOI)) | ||
} | ||
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writerContainer.close() | ||
} | ||
} | ||
} |
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Can you add scala doc about what this class does?