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Functions: Hashing: add sipHash128Reference{,Keyed}

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Salvatore Mesoraca 2023-02-03 16:08:23 +01:00
parent 001b714d3e
commit 476342602b
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GPG Key ID: 0567E50A25403074
2 changed files with 39 additions and 0 deletions
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37
src/Functions/FunctionsHashing.h
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@ -363,6 +363,41 @@ struct SipHash128KeyedImpl
static constexpr bool use_int_hash_for_pods = false;
};
struct SipHash128ReferenceImpl
{
static constexpr auto name = "sipHash128Reference";
using ReturnType = UInt128;
static UInt128 combineHashes(UInt128 h1, UInt128 h2) { return combineHashesFunc<UInt128, SipHash128Impl>(h1, h2); }
static UInt128 apply(const char * data, const size_t size) { return sipHash128Reference(data, size); }
static constexpr bool use_int_hash_for_pods = false;
};
struct SipHash128ReferenceKeyedImpl
{
static constexpr auto name = "sipHash128ReferenceKeyed";
using ReturnType = UInt128;
using Key = impl::SipHashKey;
static Key parseKey(const ColumnWithTypeAndName & key) { return impl::parseSipHashKey(key); }
static UInt128 applyKeyed(const Key & key, const char * begin, size_t size)
{
return sipHash128ReferenceKeyed(key.key0, key.key1, begin, size);
}
static UInt128 combineHashesKeyed(const Key & key, UInt128 h1, UInt128 h2)
{
UInt128 hashes[] = {h1, h2};
return applyKeyed(key, reinterpret_cast<const char *>(hashes), 2 * sizeof(UInt128));
}
static constexpr bool use_int_hash_for_pods = false;
};
/** Why we need MurmurHash2?
* MurmurHash2 is an outdated hash function, superseded by MurmurHash3 and subsequently by CityHash, xxHash, HighwayHash.
* Usually there is no reason to use MurmurHash.
@ -1624,6 +1659,8 @@ using FunctionSHA512 = FunctionStringHashFixedString<SHA512Impl>;
#endif
using FunctionSipHash128 = FunctionAnyHash<SipHash128Impl>;
using FunctionSipHash128Keyed = FunctionAnyHash<SipHash128KeyedImpl, true, SipHash128KeyedImpl::Key>;
using FunctionSipHash128Reference = FunctionAnyHash<SipHash128ReferenceImpl>;
using FunctionSipHash128ReferenceKeyed = FunctionAnyHash<SipHash128ReferenceKeyedImpl, true, SipHash128ReferenceKeyedImpl::Key>;
using FunctionCityHash64 = FunctionAnyHash<ImplCityHash64>;
using FunctionFarmFingerprint64 = FunctionAnyHash<ImplFarmFingerprint64>;
using FunctionFarmHash64 = FunctionAnyHash<ImplFarmHash64>;

2
src/Functions/FunctionsHashingMisc.cpp
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@ -15,6 +15,8 @@ REGISTER_FUNCTION(Hashing)
factory.registerFunction<FunctionSipHash64Keyed>();
factory.registerFunction<FunctionSipHash128>();
factory.registerFunction<FunctionSipHash128Keyed>();
factory.registerFunction<FunctionSipHash128Reference>();
factory.registerFunction<FunctionSipHash128ReferenceKeyed>();
factory.registerFunction<FunctionCityHash64>();
factory.registerFunction<FunctionFarmFingerprint64>();
factory.registerFunction<FunctionFarmHash64>();