| // 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.catalog; |
| |
| import java.util.List; |
| |
| import org.apache.impala.analysis.LiteralExpr; |
| import org.apache.impala.planner.HdfsPartitionPruner; |
| |
| /** |
| * A specification of a partition that is part of a table, sufficient |
| * for pruning by {@link HdfsPartitionPruner}. |
| * |
| * This interface only exposes the partition ID and values, so it can |
| * be implemented by only fetching partition names and not the complete |
| * partition metadata. |
| */ |
| public interface PrunablePartition { |
| /** |
| * Returns the identifier of this partition, suitable for later passing |
| * to {@link FeFsTable#loadPartitions(java.util.Collection)} |
| */ |
| public long getId(); |
| |
| /** |
| * Returns the values associated with this partition |
| */ |
| List<LiteralExpr> getPartitionValues(); |
| } |
