| // 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 java.util.List; |
| |
| import org.apache.impala.catalog.FeFsPartition; |
| import org.apache.impala.catalog.FeFsTable; |
| import org.apache.impala.catalog.FeTable; |
| import org.apache.impala.common.AnalysisException; |
| import org.apache.impala.thrift.TAlterTableParams; |
| import org.apache.impala.thrift.TAlterTableSetCachedParams; |
| import org.apache.impala.thrift.TAlterTableType; |
| import com.google.common.base.Preconditions; |
| |
| /** |
| * Represents an ALTER TABLE [PARTITION partitionSet] SET [UNCACHED|CACHED 'pool']. |
| */ |
| public class AlterTableSetCachedStmt extends AlterTableSetStmt { |
| private final HdfsCachingOp cacheOp_; |
| |
| public AlterTableSetCachedStmt(TableName tableName, |
| PartitionSet partitionSet, HdfsCachingOp cacheOp) { |
| super(tableName, partitionSet); |
| Preconditions.checkNotNull(cacheOp); |
| cacheOp_ = cacheOp; |
| } |
| |
| @Override |
| public TAlterTableParams toThrift() { |
| TAlterTableParams params = super.toThrift(); |
| params.setAlter_type(TAlterTableType.SET_CACHED); |
| TAlterTableSetCachedParams cachingParams = |
| new TAlterTableSetCachedParams(); |
| if (getPartitionSet() != null) { |
| cachingParams.setPartition_set(getPartitionSet().toThrift()); |
| } |
| cachingParams.setCache_op(cacheOp_.toThrift()); |
| params.setSet_cached_params(cachingParams); |
| return params; |
| } |
| |
| @Override |
| public void analyze(Analyzer analyzer) throws AnalysisException { |
| super.analyze(analyzer); |
| cacheOp_.analyze(analyzer); |
| |
| FeTable table = getTargetTable(); |
| Preconditions.checkNotNull(table); |
| if (!(table instanceof FeFsTable)) { |
| throw new AnalysisException("ALTER TABLE SET [CACHED|UNCACHED] must target an " + |
| "HDFS table: " + table.getFullName()); |
| } |
| |
| if (cacheOp_.shouldCache()) { |
| boolean isCacheable = true; |
| PartitionSet partitionSet = getPartitionSet(); |
| FeFsTable hdfsTable = (FeFsTable)table; |
| StringBuilder nameSb = new StringBuilder(); |
| if (partitionSet != null) { |
| List<? extends FeFsPartition> parts = partitionSet.getPartitions(); |
| nameSb.append("Partition(s) ("); |
| for(FeFsPartition part: parts) { |
| isCacheable = isCacheable && part.isCacheable(); |
| if(!part.isCacheable()) nameSb.append(part.getPartitionName()); |
| } |
| nameSb.append(")"); |
| } else { |
| isCacheable = hdfsTable.isCacheable(); |
| nameSb.append("Table ").append(table.getFullName()); |
| } |
| if (!isCacheable) { |
| throw new AnalysisException(nameSb.toString() + " cannot be cached. Please " + |
| "check if the table or partitions are on a filesystem which supports " + |
| "caching."); |
| } |
| } |
| } |
| } |