io.delta.hive.DeltaOutputFormat.scala Maven / Gradle / Ivy
The newest version!
/*
* Copyright (2020-present) The Delta Lake Project Authors.
*
* Licensed 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 io.delta.hive
import org.apache.hadoop.fs.FileSystem
import org.apache.hadoop.io.{ArrayWritable, NullWritable}
import org.apache.hadoop.mapred.{JobConf, OutputFormat, RecordWriter}
import org.apache.hadoop.util.Progressable
/**
* This class is not a real implementation. We use it to prevent from writing to a Delta table in
* Hive before we support it.
*/
class DeltaOutputFormat extends OutputFormat[NullWritable, ArrayWritable] {
private def writingNotSupported[T](): T = {
throw new UnsupportedOperationException(
"Writing to a Delta table in Hive is not supported. Please use Spark to write.")
}
override def getRecordWriter(
ignored: FileSystem,
job: JobConf,
name: String,
progress: Progressable): RecordWriter[NullWritable, ArrayWritable] = writingNotSupported()
override def checkOutputSpecs(ignored: FileSystem, job: JobConf): Unit = writingNotSupported()
}