spark FallBackFileSourceV2 源码
spark FallBackFileSourceV2 代码
文件路径：/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/FallBackFileSourceV2.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.datasources
import scala.collection.JavaConverters._
import org.apache.spark.sql.SparkSession
import org.apache.spark.sql.catalyst.plans.logical.{InsertIntoStatement, LogicalPlan}
import org.apache.spark.sql.catalyst.rules.Rule
import org.apache.spark.sql.execution.datasources.v2.{DataSourceV2Relation, FileTable}
/**
* Replace the File source V2 table in [[InsertIntoStatement]] to V1 [[FileFormat]].
* E.g, with temporary view `t` using
* [[org.apache.spark.sql.execution.datasources.v2.FileDataSourceV2]], inserting into view `t` fails
* since there is no corresponding physical plan.
* This is a temporary hack for making current data source V2 work. It should be
* removed when Catalog support of file data source v2 is finished.
*/
class FallBackFileSourceV2(sparkSession: SparkSession) extends Rule[LogicalPlan] {
override def apply(plan: LogicalPlan): LogicalPlan = plan resolveOperators {
case i @ InsertIntoStatement(
d @ DataSourceV2Relation(table: FileTable, _, _, _, _), _, _, _, _, _) =>
val v1FileFormat = table.fallbackFileFormat.newInstance()
val relation = HadoopFsRelation(
table.fileIndex,
table.fileIndex.partitionSchema,
table.schema,
None,
v1FileFormat,
d.options.asScala.toMap)(sparkSession)
i.copy(table = LogicalRelation(relation))
}
}
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