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35 lines
793 B
C++
35 lines
793 B
C++
#include "FunctionsConsistentHashing.h"
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#include <Functions/FunctionFactory.h>
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#include <sumbur.h>
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namespace DB
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{
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struct SumburConsistentHashImpl
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{
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static constexpr auto name = "sumburConsistentHash";
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using HashType = UInt32;
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using ResultType = UInt16;
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using BucketsType = ResultType;
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static constexpr auto max_buckets = static_cast<UInt64>(std::numeric_limits<BucketsType>::max());
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static inline ResultType apply(HashType hash, BucketsType n)
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{
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return static_cast<ResultType>(sumburConsistentHash(hash, n));
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}
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};
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using FunctionSumburConsistentHash = FunctionConsistentHashImpl<SumburConsistentHashImpl>;
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void registerFunctionSumburConsistentHash(FunctionFactory & factory)
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{
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factory.registerFunction<FunctionSumburConsistentHash>();
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}
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}
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