spark RenameTableExec 源码

2022-10-20
浏览 (120)

spark RenameTableExec 代码

文件路径：/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/v2/RenameTableExec.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.v2

import org.apache.spark.sql.SparkSession
import org.apache.spark.sql.catalyst.InternalRow
import org.apache.spark.sql.catalyst.expressions.Attribute
import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan
import org.apache.spark.sql.connector.catalog.{Identifier, TableCatalog}
import org.apache.spark.storage.StorageLevel

/**
 * Physical plan node for renaming a table.
 */
case class RenameTableExec(
    catalog: TableCatalog,
    oldIdent: Identifier,
    newIdent: Identifier,
    invalidateCache: () => Option[StorageLevel],
    cacheTable: (SparkSession, LogicalPlan, Option[String], StorageLevel) => Unit)
  extends LeafV2CommandExec {

  override def output: Seq[Attribute] = Seq.empty

  override protected def run(): Seq[InternalRow] = {
    import org.apache.spark.sql.connector.catalog.CatalogV2Implicits.IdentifierHelper

    val optOldStorageLevel = invalidateCache()
    catalog.invalidateTable(oldIdent)

    // If new identifier consists of a table name only, the table should be renamed in place.
    // Such behavior matches to the v1 implementation of table renaming in Spark and other DBMSs.
    val qualifiedNewIdent = if (newIdent.namespace.isEmpty) {
      Identifier.of(oldIdent.namespace, newIdent.name)
    } else newIdent
    catalog.renameTable(oldIdent, qualifiedNewIdent)

    optOldStorageLevel.foreach { oldStorageLevel =>
      val tbl = catalog.loadTable(qualifiedNewIdent)
      val newRelation = DataSourceV2Relation.create(tbl, Some(catalog), Some(qualifiedNewIdent))
      cacheTable(
        session,
        newRelation,
        Some(qualifiedNewIdent.quoted), oldStorageLevel)
    }
    Seq.empty
  }
}

相关信息

spark 源码目录

相关文章

spark AddPartitionExec 源码

spark AlterNamespaceSetPropertiesExec 源码

spark AlterTableExec 源码

spark BatchScanExec 源码

spark CacheTableExec 源码

spark ContinuousScanExec 源码

spark CreateIndexExec 源码

spark CreateNamespaceExec 源码

spark CreateTableExec 源码

spark DataSourceRDD 源码

0 赞

所属分类： 前端技术
本文标签：
版权声明： 原创文章如转载，请注明本文链接: https://www.seaxiang.com/blog/16d7190d371544f99def64c74e43ef46

热门推荐

1、直接访问google.com
2、 - 优质文章
3、 gate.io
4、 harmony 鸿蒙hdc使用指导
5、 harmony 鸿蒙初识ArkTS语言
6、 flink kafka connector scan.startup.mode 的几个选项
7、 openharmony
8、 golang
9、 harmony 鸿蒙ArkUI组件（ArkTS）开发常见问题
10、 Vue中input框自动聚焦

Loading...