OmniSciDB  c07336695a
shard_key.h
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1 /*
2  * Copyright 2017 MapD Technologies, Inc.
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  * http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #ifndef SHARED_SHARDKEY_H_
18 #define SHARED_SHARDKEY_H_
19 
20 #define SHARD_FOR_KEY(key, num_shards) ((key % num_shards + num_shards) % num_shards)
21 
22 #endif // SHARED_SHARDKEY_H_