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HijackViewCommands.scala
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HijackViewCommands.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, 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.catalyst.analysis
import org.apache.spark.sql.SparkSession
import org.apache.spark.sql.catalyst.plans.logical.DropView
import org.apache.spark.sql.catalyst.plans.logical.LogicalPlan
import org.apache.spark.sql.catalyst.plans.logical.views.DropIcebergView
import org.apache.spark.sql.catalyst.rules.Rule
import org.apache.spark.sql.connector.catalog.CatalogManager
import org.apache.spark.sql.connector.catalog.CatalogPlugin
import org.apache.spark.sql.connector.catalog.LookupCatalog
import org.apache.spark.sql.connector.catalog.ViewCatalog
/**
* ResolveSessionCatalog exits early for some v2 View commands,
* thus they are pre-substituted here and then handled in ResolveViews
*/
case class HijackViewCommands(spark: SparkSession) extends Rule[LogicalPlan] with LookupCatalog {
protected lazy val catalogManager: CatalogManager = spark.sessionState.catalogManager
override def apply(plan: LogicalPlan): LogicalPlan = plan.resolveOperatorsUp {
case DropView(UnresolvedIdentifier(nameParts, allowTemp), ifExists)
if isViewCatalog(catalogManager.currentCatalog) && !isTempView(nameParts) =>
DropIcebergView(UnresolvedIdentifier(nameParts, allowTemp), ifExists)
}
private def isTempView(nameParts: Seq[String]): Boolean = {
catalogManager.v1SessionCatalog.isTempView(nameParts)
}
private def isViewCatalog(catalog: CatalogPlugin): Boolean = {
catalog.isInstanceOf[ViewCatalog]
}
}