Github user gengliangwang commented on a diff in the pull request: https://github.com/apache/spark/pull/20933#discussion_r181531212 --- Diff: sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/v2/orc/OrcDataSourceV2.scala --- @@ -0,0 +1,194 @@ +/* + * 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.datasources.v2.orc + +import java.net.URI +import java.util.Locale + +import org.apache.hadoop.conf.Configuration +import org.apache.hadoop.fs.{FileStatus, Path} +import org.apache.hadoop.mapreduce.{JobID, TaskAttemptID, TaskID, TaskType} +import org.apache.hadoop.mapreduce.lib.input.FileSplit +import org.apache.hadoop.mapreduce.task.TaskAttemptContextImpl +import org.apache.orc.{OrcConf, OrcFile} +import org.apache.orc.mapred.OrcStruct +import org.apache.orc.mapreduce.OrcInputFormat + +import org.apache.spark.TaskContext +import org.apache.spark.sql.SparkSession +import org.apache.spark.sql.catalyst.InternalRow +import org.apache.spark.sql.catalyst.expressions.{Expression, JoinedRow} +import org.apache.spark.sql.catalyst.expressions.codegen.GenerateUnsafeProjection +import org.apache.spark.sql.execution.datasources._ +import org.apache.spark.sql.execution.datasources.orc.{OrcColumnarBatchReader, OrcDeserializer, OrcFilters, OrcUtils} +import org.apache.spark.sql.execution.datasources.v2.ColumnarBatchFileSourceReader +import org.apache.spark.sql.internal.SQLConf +import org.apache.spark.sql.sources.v2.{DataSourceOptions, DataSourceV2, ReadSupport, ReadSupportWithSchema} +import org.apache.spark.sql.sources.v2.reader._ +import org.apache.spark.sql.types.{AtomicType, StructType} +import org.apache.spark.util.SerializableConfiguration + +class OrcDataSourceV2 extends DataSourceV2 with ReadSupport with ReadSupportWithSchema { + override def createReader(options: DataSourceOptions): DataSourceReader = { + new OrcDataSourceReader(options, None) + } + + override def createReader(schema: StructType, options: DataSourceOptions): DataSourceReader = { + new OrcDataSourceReader(options, Some(schema)) + } +} + +case class OrcDataSourceReader(options: DataSourceOptions, userSpecifiedSchema: Option[StructType]) + extends ColumnarBatchFileSourceReader + with SupportsPushDownCatalystFilters { + + override def inferSchema(files: Seq[FileStatus]): Option[StructType] = { + OrcUtils.readSchema(sparkSession, files) + } + + private var pushedFiltersArray: Array[Expression] = Array.empty + + override def readFunction: PartitionedFile => Iterator[InternalRow] = { --- End diff -- With #21029, we can get rid of this.
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