spark DropTableExec 源码
spark DropTableExec 代码
文件路径：/sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/v2/DropTableExec.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.catalyst.InternalRow
import org.apache.spark.sql.catalyst.expressions.Attribute
import org.apache.spark.sql.connector.catalog.{Identifier, TableCatalog}
import org.apache.spark.sql.errors.QueryCompilationErrors
/**
* Physical plan node for dropping a table.
*/
case class DropTableExec(
catalog: TableCatalog,
ident: Identifier,
ifExists: Boolean,
purge: Boolean,
invalidateCache: () => Unit) extends LeafV2CommandExec {
override def run(): Seq[InternalRow] = {
if (catalog.tableExists(ident)) {
invalidateCache()
if (purge) catalog.purgeTable(ident) else catalog.dropTable(ident)
} else if (!ifExists) {
throw QueryCompilationErrors.noSuchTableError(
catalog.name() +: ident.namespace() :+ ident.name())
}
Seq.empty
}
override def output: Seq[Attribute] = Seq.empty
}
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