| // 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.impala.analysis; |
| |
| import org.apache.impala.authorization.Privilege; |
| import org.apache.impala.catalog.KuduTable; |
| import org.apache.impala.catalog.Table; |
| import org.apache.impala.common.AnalysisException; |
| import org.apache.impala.thrift.TAlterTableDropPartitionParams; |
| import org.apache.impala.thrift.TAlterTableParams; |
| import org.apache.impala.thrift.TAlterTableType; |
| import com.google.common.base.Preconditions; |
| |
| /** |
| * Represents an ALTER TABLE DROP PARTITION statement. |
| */ |
| public class AlterTableDropPartitionStmt extends AlterTableStmt { |
| private final boolean ifExists_; |
| private final PartitionSet partitionSet_; |
| |
| // Setting this value causes dropped partition(s) to be permanently |
| // deleted. For example, for HDFS tables it skips the trash mechanism |
| private final boolean purgePartition_; |
| |
| public AlterTableDropPartitionStmt(TableName tableName, |
| PartitionSet partitionSet, boolean ifExists, boolean purgePartition) { |
| super(tableName); |
| Preconditions.checkNotNull(partitionSet); |
| partitionSet_ = partitionSet; |
| partitionSet_.setTableName(tableName); |
| ifExists_ = ifExists; |
| purgePartition_ = purgePartition; |
| } |
| |
| public boolean getIfNotExists() { return ifExists_; } |
| |
| @Override |
| public String toSql() { |
| StringBuilder sb = new StringBuilder("ALTER TABLE " + getTbl()); |
| sb.append(" DROP "); |
| if (ifExists_) sb.append("IF EXISTS "); |
| sb.append(partitionSet_.toSql()); |
| if (purgePartition_) sb.append(" PURGE"); |
| return sb.toString(); |
| } |
| |
| @Override |
| public TAlterTableParams toThrift() { |
| TAlterTableParams params = super.toThrift(); |
| params.setAlter_type(TAlterTableType.DROP_PARTITION); |
| TAlterTableDropPartitionParams addPartParams = new TAlterTableDropPartitionParams(); |
| addPartParams.setPartition_set(partitionSet_.toThrift()); |
| addPartParams.setIf_exists(!partitionSet_.getPartitionShouldExist()); |
| addPartParams.setPurge(purgePartition_); |
| params.setDrop_partition_params(addPartParams); |
| return params; |
| } |
| |
| @Override |
| public void analyze(Analyzer analyzer) throws AnalysisException { |
| super.analyze(analyzer); |
| Table table = getTargetTable(); |
| if (table instanceof KuduTable) { |
| throw new AnalysisException("ALTER TABLE DROP PARTITION is not supported for " + |
| "Kudu tables: " + partitionSet_.toSql()); |
| } |
| if (!ifExists_) partitionSet_.setPartitionShouldExist(); |
| partitionSet_.setPrivilegeRequirement(Privilege.ALTER); |
| partitionSet_.analyze(analyzer); |
| } |
| } |