| // 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. |
| |
| namespace cpp impala |
| namespace java org.apache.impala.thrift |
| |
| include "Exprs.thrift" |
| |
| enum TPartitionType { |
| UNPARTITIONED = 0 |
| |
| // round-robin partition |
| RANDOM = 1 |
| |
| // unordered partition on a set of exprs |
| // (partition bounds overlap) |
| HASH_PARTITIONED = 2 |
| |
| // ordered partition on a list of exprs |
| // (partition bounds don't overlap) |
| RANGE_PARTITIONED = 3 |
| |
| // use the partitioning scheme of a Kudu table |
| // TODO: this is a special case now because Kudu supports multilevel partition |
| // schemes. We should add something like lists of TDataPartitions to reflect that |
| // and then this can be removed. (IMPALA-5255) |
| KUDU = 4 |
| } |
| |
| // Specification of how a single logical data stream is partitioned. |
| // This leaves out the parameters that determine the physical partition (for hash |
| // partitions, the number of partitions; for range partitions, the partitions' |
| // boundaries), which need to be specified by the enclosing structure/context. |
| struct TDataPartition { |
| 1: required TPartitionType type |
| 2: optional list<Exprs.TExpr> partition_exprs |
| } |