spark OrcTable 源码
spark OrcTable 代码
文件路径：/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/v2/orc/OrcTable.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,
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* See the License for the specific language governing permissions and
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package org.apache.spark.sql.execution.datasources.v2.orc
import scala.collection.JavaConverters._
import org.apache.hadoop.fs.FileStatus
import org.apache.spark.sql.SparkSession
import org.apache.spark.sql.connector.write.{LogicalWriteInfo, Write, WriteBuilder}
import org.apache.spark.sql.execution.datasources.FileFormat
import org.apache.spark.sql.execution.datasources.orc.OrcUtils
import org.apache.spark.sql.execution.datasources.v2.FileTable
import org.apache.spark.sql.types._
import org.apache.spark.sql.util.CaseInsensitiveStringMap
case class OrcTable(
name: String,
sparkSession: SparkSession,
options: CaseInsensitiveStringMap,
paths: Seq[String],
userSpecifiedSchema: Option[StructType],
fallbackFileFormat: Class[_ <: FileFormat])
extends FileTable(sparkSession, options, paths, userSpecifiedSchema) {
override def newScanBuilder(options: CaseInsensitiveStringMap): OrcScanBuilder =
new OrcScanBuilder(sparkSession, fileIndex, schema, dataSchema, options)
override def inferSchema(files: Seq[FileStatus]): Option[StructType] =
OrcUtils.inferSchema(sparkSession, files, options.asScala.toMap)
override def newWriteBuilder(info: LogicalWriteInfo): WriteBuilder =
new WriteBuilder {
override def build(): Write = OrcWrite(paths, formatName, supportsDataType, info)
}
override def supportsDataType(dataType: DataType): Boolean = dataType match {
case _: AtomicType => true
case st: StructType => st.forall { f => supportsDataType(f.dataType) }
case ArrayType(elementType, _) => supportsDataType(elementType)
case MapType(keyType, valueType, _) =>
supportsDataType(keyType) && supportsDataType(valueType)
case udt: UserDefinedType[_] => supportsDataType(udt.sqlType)
case _ => false
}
override def formatName: String = "ORC"
}
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