diff --git a/dbms/src/Functions/FunctionsConsistentHashing.cpp b/dbms/src/Functions/FunctionsConsistentHashing.cpp
deleted file mode 100644
index 7f93257774b..00000000000
--- a/dbms/src/Functions/FunctionsConsistentHashing.cpp
+++ /dev/null
@@ -1,15 +0,0 @@
-#include "FunctionsConsistentHashing.h"
-#include <Functions/FunctionFactory.h>
-
-
-namespace DB
-{
-
-void registerFunctionsConsistentHashing(FunctionFactory & factory)
-{
-    factory.registerFunction<FunctionYandexConsistentHash>();
-    factory.registerFunction<FunctionJumpConsistentHash>();
-    factory.registerFunction<FunctionSumburConsistentHash>();
-}
-
-}
diff --git a/dbms/src/Functions/FunctionsConsistentHashing.h b/dbms/src/Functions/FunctionsConsistentHashing.h
index 04640e0ec57..25c6c868306 100644
--- a/dbms/src/Functions/FunctionsConsistentHashing.h
+++ b/dbms/src/Functions/FunctionsConsistentHashing.h
@@ -8,9 +8,6 @@
 #include <Common/typeid_cast.h>
 #include <common/likely.h>
 
-#include <sumbur.h>
-#include <consistent_hashing.h>
-
 
 namespace DB
 {
@@ -23,69 +20,6 @@ namespace ErrorCodes
 }
 
 
-/// An O(1) time and space consistent hash algorithm by Konstantin Oblakov
-struct YandexConsistentHashImpl
-{
-    static constexpr auto name = "yandexConsistentHash";
-
-    using HashType = UInt64;
-    /// Actually it supports UInt64, but it is efficient only if n <= 32768
-    using ResultType = UInt16;
-    using BucketsType = ResultType;
-    static constexpr auto max_buckets = 32768;
-
-    static inline ResultType apply(UInt64 hash, BucketsType n)
-    {
-        return ConsistentHashing(hash, n);
-    }
-};
-
-
-/// Code from https://arxiv.org/pdf/1406.2294.pdf
-static inline int32_t JumpConsistentHash(uint64_t key, int32_t num_buckets)
-{
-    int64_t b = -1, j = 0;
-    while (j < num_buckets)
-    {
-        b = j;
-        key = key * 2862933555777941757ULL + 1;
-        j = static_cast<int64_t>((b + 1) * (double(1LL << 31) / double((key >> 33) + 1)));
-    }
-    return static_cast<int32_t>(b);
-}
-
-struct JumpConsistentHashImpl
-{
-    static constexpr auto name = "jumpConsistentHash";
-
-    using HashType = UInt64;
-    using ResultType = Int32;
-    using BucketsType = ResultType;
-    static constexpr auto max_buckets = static_cast<UInt64>(std::numeric_limits<BucketsType>::max());
-
-    static inline ResultType apply(UInt64 hash, BucketsType n)
-    {
-        return JumpConsistentHash(hash, n);
-    }
-};
-
-
-struct SumburConsistentHashImpl
-{
-    static constexpr auto name = "sumburConsistentHash";
-
-    using HashType = UInt32;
-    using ResultType = UInt16;
-    using BucketsType = ResultType;
-    static constexpr auto max_buckets = static_cast<UInt64>(std::numeric_limits<BucketsType>::max());
-
-    static inline ResultType apply(HashType hash, BucketsType n)
-    {
-        return static_cast<ResultType>(sumburConsistentHash(hash, n));
-    }
-};
-
-
 template <typename Impl>
 class FunctionConsistentHashImpl : public IFunction
 {
@@ -221,10 +155,4 @@ private:
     }
 };
 
-
-using FunctionYandexConsistentHash = FunctionConsistentHashImpl<YandexConsistentHashImpl>;
-using FunctionJumpConsistentHash = FunctionConsistentHashImpl<JumpConsistentHashImpl>;
-using FunctionSumburConsistentHash = FunctionConsistentHashImpl<SumburConsistentHashImpl>;
-
-
 }
diff --git a/dbms/src/Functions/FunctionsVisitParam.cpp b/dbms/src/Functions/FunctionsVisitParam.cpp
deleted file mode 100644
index 8d82f93a3db..00000000000
--- a/dbms/src/Functions/FunctionsVisitParam.cpp
+++ /dev/null
@@ -1,38 +0,0 @@
-#include <Functions/FunctionFactory.h>
-#include <Functions/FunctionsVisitParam.h>
-#include <Functions/FunctionsStringSearch.h>
-
-
-namespace DB
-{
-
-struct NameVisitParamHas           { static constexpr auto name = "visitParamHas"; };
-struct NameVisitParamExtractUInt   { static constexpr auto name = "visitParamExtractUInt"; };
-struct NameVisitParamExtractInt    { static constexpr auto name = "visitParamExtractInt"; };
-struct NameVisitParamExtractFloat  { static constexpr auto name = "visitParamExtractFloat"; };
-struct NameVisitParamExtractBool   { static constexpr auto name = "visitParamExtractBool"; };
-struct NameVisitParamExtractRaw    { static constexpr auto name = "visitParamExtractRaw"; };
-struct NameVisitParamExtractString { static constexpr auto name = "visitParamExtractString"; };
-
-
-using FunctionVisitParamHas = FunctionsStringSearch<ExtractParamImpl<HasParam>, NameVisitParamHas>;
-using FunctionVisitParamExtractUInt = FunctionsStringSearch<ExtractParamImpl<ExtractNumericType<UInt64>>, NameVisitParamExtractUInt>;
-using FunctionVisitParamExtractInt = FunctionsStringSearch<ExtractParamImpl<ExtractNumericType<Int64>>, NameVisitParamExtractInt>;
-using FunctionVisitParamExtractFloat = FunctionsStringSearch<ExtractParamImpl<ExtractNumericType<Float64>>, NameVisitParamExtractFloat>;
-using FunctionVisitParamExtractBool = FunctionsStringSearch<ExtractParamImpl<ExtractBool>, NameVisitParamExtractBool>;
-using FunctionVisitParamExtractRaw = FunctionsStringSearchToString<ExtractParamToStringImpl<ExtractRaw>, NameVisitParamExtractRaw>;
-using FunctionVisitParamExtractString = FunctionsStringSearchToString<ExtractParamToStringImpl<ExtractString>, NameVisitParamExtractString>;
-
-
-void registerFunctionsVisitParam(FunctionFactory & factory)
-{
-    factory.registerFunction<FunctionVisitParamHas>();
-    factory.registerFunction<FunctionVisitParamExtractUInt>();
-    factory.registerFunction<FunctionVisitParamExtractInt>();
-    factory.registerFunction<FunctionVisitParamExtractFloat>();
-    factory.registerFunction<FunctionVisitParamExtractBool>();
-    factory.registerFunction<FunctionVisitParamExtractRaw>();
-    factory.registerFunction<FunctionVisitParamExtractString>();
-}
-
-}
diff --git a/dbms/src/Functions/FunctionsVisitParam.h b/dbms/src/Functions/FunctionsVisitParam.h
index 353dda930ef..41bef3947ec 100644
--- a/dbms/src/Functions/FunctionsVisitParam.h
+++ b/dbms/src/Functions/FunctionsVisitParam.h
@@ -1,14 +1,9 @@
 #pragma once
 
-#include <Poco/UTF8Encoding.h>
-#include <Poco/Unicode.h>
 #include <DataTypes/DataTypesNumber.h>
 #include <DataTypes/DataTypeString.h>
 #include <DataTypes/DataTypeFixedString.h>
 #include <Columns/ColumnString.h>
-#include <Columns/ColumnArray.h>
-#include <Columns/ColumnFixedString.h>
-#include <Common/hex.h>
 #include <Common/Volnitsky.h>
 #include <Functions/IFunction.h>
 #include <Functions/FunctionHelpers.h>
@@ -43,15 +38,6 @@ namespace ErrorCodes
     extern const int ILLEGAL_COLUMN;
 }
 
-struct HasParam
-{
-    using ResultType = UInt8;
-
-    static UInt8 extract(const UInt8 *, const UInt8 *)
-    {
-        return true;
-    }
-};
 
 template <typename NumericType>
 struct ExtractNumericType
@@ -78,77 +64,6 @@ struct ExtractNumericType
     }
 };
 
-struct ExtractBool
-{
-    using ResultType = UInt8;
-
-    static UInt8 extract(const UInt8 * begin, const UInt8 * end)
-    {
-        return begin + 4 <= end && 0 == strncmp(reinterpret_cast<const char *>(begin), "true", 4);
-    }
-};
-
-
-struct ExtractRaw
-{
-    using ExpectChars = PODArrayWithStackMemory<char, 64>;
-
-    static void extract(const UInt8 * pos, const UInt8 * end, ColumnString::Chars & res_data)
-    {
-        ExpectChars expects_end;
-        UInt8 current_expect_end = 0;
-
-        for (auto extract_begin = pos; pos != end; ++pos)
-        {
-            if (current_expect_end && *pos == current_expect_end)
-            {
-                expects_end.pop_back();
-                current_expect_end = expects_end.empty() ? 0 : expects_end.back();
-            }
-            else
-            {
-                switch (*pos)
-                {
-                    case '[':
-                        current_expect_end = ']';
-                        expects_end.push_back(current_expect_end);
-                        break;
-                    case '{':
-                        current_expect_end = '}';
-                        expects_end.push_back(current_expect_end);
-                        break;
-                    case '"' :
-                        current_expect_end = '"';
-                        expects_end.push_back(current_expect_end);
-                        break;
-                    case '\\':
-                        /// skip backslash
-                        if (pos + 1 < end && pos[1] == '"')
-                            pos++;
-                        break;
-                    default:
-                        if (!current_expect_end && (*pos == ',' || *pos == '}'))
-                        {
-                            res_data.insert(extract_begin, pos);
-                            return;
-                        }
-                }
-            }
-        }
-    }
-};
-
-struct ExtractString
-{
-    static void extract(const UInt8 * pos, const UInt8 * end, ColumnString::Chars & res_data)
-    {
-        size_t old_size = res_data.size();
-        ReadBufferFromMemory in(pos, end - pos);
-        if (!tryReadJSONStringInto(res_data, in))
-            res_data.resize(old_size);
-    }
-};
-
 
 /** Searches for occurrences of a field in the visit parameter and calls ParamExtractor
  * for each occurrence of the field, passing it a pointer to the part of the string,
@@ -285,6 +200,4 @@ struct ExtractParamToStringImpl
     }
 };
 
-
-
 }
diff --git a/dbms/src/Functions/jumpConsistentHash.cpp b/dbms/src/Functions/jumpConsistentHash.cpp
new file mode 100644
index 00000000000..b1a3109c066
--- /dev/null
+++ b/dbms/src/Functions/jumpConsistentHash.cpp
@@ -0,0 +1,44 @@
+#include "FunctionsConsistentHashing.h"
+#include <Functions/FunctionFactory.h>
+
+
+namespace DB
+{
+
+/// Code from https://arxiv.org/pdf/1406.2294.pdf
+static inline int32_t JumpConsistentHash(uint64_t key, int32_t num_buckets)
+{
+    int64_t b = -1, j = 0;
+    while (j < num_buckets)
+    {
+        b = j;
+        key = key * 2862933555777941757ULL + 1;
+        j = static_cast<int64_t>((b + 1) * (double(1LL << 31) / double((key >> 33) + 1)));
+    }
+    return static_cast<int32_t>(b);
+}
+
+struct JumpConsistentHashImpl
+{
+    static constexpr auto name = "jumpConsistentHash";
+
+    using HashType = UInt64;
+    using ResultType = Int32;
+    using BucketsType = ResultType;
+    static constexpr auto max_buckets = static_cast<UInt64>(std::numeric_limits<BucketsType>::max());
+
+    static inline ResultType apply(UInt64 hash, BucketsType n)
+    {
+        return JumpConsistentHash(hash, n);
+    }
+};
+
+using FunctionJumpConsistentHash = FunctionConsistentHashImpl<JumpConsistentHashImpl>;
+
+void registerFunctionJumpConsistentHash(FunctionFactory & factory)
+{
+    factory.registerFunction<FunctionJumpConsistentHash>();
+}
+
+}
+
diff --git a/dbms/src/Functions/registerFunctions.cpp b/dbms/src/Functions/registerFunctions.cpp
index eba9a96e5e0..501f8e7f90a 100644
--- a/dbms/src/Functions/registerFunctions.cpp
+++ b/dbms/src/Functions/registerFunctions.cpp
@@ -20,7 +20,6 @@ void registerFunctionsExternalDictionaries(FunctionFactory &);
 void registerFunctionsExternalModels(FunctionFactory &);
 void registerFunctionsFormatting(FunctionFactory &);
 void registerFunctionsHashing(FunctionFactory &);
-void registerFunctionsConsistentHashing(FunctionFactory &);
 void registerFunctionsHigherOrder(FunctionFactory &);
 void registerFunctionsLogical(FunctionFactory &);
 void registerFunctionsMiscellaneous(FunctionFactory &);
@@ -41,6 +40,7 @@ void registerFunctionsNull(FunctionFactory &);
 void registerFunctionsFindCluster(FunctionFactory &);
 void registerFunctionsJSON(FunctionFactory &);
 void registerFunctionsIntrospection(FunctionFactory &);
+void registerFunctionsConsistentHashing(FunctionFactory & factory);
 
 void registerFunctions()
 {
@@ -60,7 +60,6 @@ void registerFunctions()
     registerFunctionsExternalModels(factory);
     registerFunctionsFormatting(factory);
     registerFunctionsHashing(factory);
-    registerFunctionsConsistentHashing(factory);
     registerFunctionsHigherOrder(factory);
     registerFunctionsLogical(factory);
     registerFunctionsMiscellaneous(factory);
@@ -80,6 +79,7 @@ void registerFunctions()
     registerFunctionsFindCluster(factory);
     registerFunctionsJSON(factory);
     registerFunctionsIntrospection(factory);
+    registerFunctionsConsistentHashing(factory);
 }
 
 }
diff --git a/dbms/src/Functions/registerFunctionsConsistentHashing.cpp b/dbms/src/Functions/registerFunctionsConsistentHashing.cpp
new file mode 100644
index 00000000000..dc1e90826bf
--- /dev/null
+++ b/dbms/src/Functions/registerFunctionsConsistentHashing.cpp
@@ -0,0 +1,18 @@
+namespace DB
+{
+
+class FunctionFactory;
+
+void registerFunctionYandexConsistentHash(FunctionFactory & factory);
+void registerFunctionJumpConsistentHash(FunctionFactory & factory);
+void registerFunctionSumburConsistentHash(FunctionFactory & factory);
+
+void registerFunctionsConsistentHashing(FunctionFactory & factory)
+{
+    registerFunctionYandexConsistentHash(factory);
+    registerFunctionJumpConsistentHash(factory);
+    registerFunctionSumburConsistentHash(factory);
+}
+
+}
+
diff --git a/dbms/src/Functions/registerFunctionsVisitParam.cpp b/dbms/src/Functions/registerFunctionsVisitParam.cpp
new file mode 100644
index 00000000000..01084594f08
--- /dev/null
+++ b/dbms/src/Functions/registerFunctionsVisitParam.cpp
@@ -0,0 +1,25 @@
+namespace DB
+{
+
+class FunctionFactory;
+
+void registerFunctionVisitParamHas(FunctionFactory & factory);
+void registerFunctionVisitParamExtractUInt(FunctionFactory & factory);
+void registerFunctionVisitParamExtractInt(FunctionFactory & factory);
+void registerFunctionVisitParamExtractFloat(FunctionFactory & factory);
+void registerFunctionVisitParamExtractBool(FunctionFactory & factory);
+void registerFunctionVisitParamExtractRaw(FunctionFactory & factory);
+void registerFunctionVisitParamExtractString(FunctionFactory & factory);
+
+void registerFunctionsVisitParam(FunctionFactory & factory)
+{
+    registerFunctionVisitParamHas(factory);
+    registerFunctionVisitParamExtractUInt(factory);
+    registerFunctionVisitParamExtractInt(factory);
+    registerFunctionVisitParamExtractFloat(factory);
+    registerFunctionVisitParamExtractBool(factory);
+    registerFunctionVisitParamExtractRaw(factory);
+    registerFunctionVisitParamExtractString(factory);
+}
+
+}
diff --git a/dbms/src/Functions/sumburConsistentHash.cpp b/dbms/src/Functions/sumburConsistentHash.cpp
new file mode 100644
index 00000000000..1fc26502355
--- /dev/null
+++ b/dbms/src/Functions/sumburConsistentHash.cpp
@@ -0,0 +1,34 @@
+#include "FunctionsConsistentHashing.h"
+#include <Functions/FunctionFactory.h>
+
+#include <sumbur.h>
+
+
+namespace DB
+{
+
+struct SumburConsistentHashImpl
+{
+    static constexpr auto name = "sumburConsistentHash";
+
+    using HashType = UInt32;
+    using ResultType = UInt16;
+    using BucketsType = ResultType;
+    static constexpr auto max_buckets = static_cast<UInt64>(std::numeric_limits<BucketsType>::max());
+
+    static inline ResultType apply(HashType hash, BucketsType n)
+    {
+        return static_cast<ResultType>(sumburConsistentHash(hash, n));
+    }
+};
+
+using FunctionSumburConsistentHash = FunctionConsistentHashImpl<SumburConsistentHashImpl>;
+
+void registerFunctionSumburConsistentHash(FunctionFactory & factory)
+{
+    factory.registerFunction<FunctionSumburConsistentHash>();
+}
+
+}
+
+
diff --git a/dbms/src/Functions/visitParamExtractBool.cpp b/dbms/src/Functions/visitParamExtractBool.cpp
new file mode 100644
index 00000000000..7f989ccbb9e
--- /dev/null
+++ b/dbms/src/Functions/visitParamExtractBool.cpp
@@ -0,0 +1,28 @@
+#include <Functions/FunctionFactory.h>
+#include <Functions/FunctionsVisitParam.h>
+#include <Functions/FunctionsStringSearch.h>
+
+
+namespace DB
+{
+
+struct ExtractBool
+{
+    using ResultType = UInt8;
+
+    static UInt8 extract(const UInt8 * begin, const UInt8 * end)
+    {
+        return begin + 4 <= end && 0 == strncmp(reinterpret_cast<const char *>(begin), "true", 4);
+    }
+};
+
+struct NameVisitParamExtractBool   { static constexpr auto name = "visitParamExtractBool"; };
+using FunctionVisitParamExtractBool = FunctionsStringSearch<ExtractParamImpl<ExtractBool>, NameVisitParamExtractBool>;
+
+
+void registerFunctionVisitParamExtractBool(FunctionFactory & factory)
+{
+    factory.registerFunction<FunctionVisitParamExtractBool>();
+}
+
+}
diff --git a/dbms/src/Functions/visitParamExtractFloat.cpp b/dbms/src/Functions/visitParamExtractFloat.cpp
new file mode 100644
index 00000000000..b02b0209daf
--- /dev/null
+++ b/dbms/src/Functions/visitParamExtractFloat.cpp
@@ -0,0 +1,18 @@
+#include <Functions/FunctionFactory.h>
+#include <Functions/FunctionsVisitParam.h>
+#include <Functions/FunctionsStringSearch.h>
+
+
+namespace DB
+{
+
+struct NameVisitParamExtractFloat  { static constexpr auto name = "visitParamExtractFloat"; };
+using FunctionVisitParamExtractFloat = FunctionsStringSearch<ExtractParamImpl<ExtractNumericType<Float64>>, NameVisitParamExtractFloat>;
+
+
+void registerFunctionVisitParamExtractFloat(FunctionFactory & factory)
+{
+    factory.registerFunction<FunctionVisitParamExtractFloat>();
+}
+
+}
diff --git a/dbms/src/Functions/visitParamExtractInt.cpp b/dbms/src/Functions/visitParamExtractInt.cpp
new file mode 100644
index 00000000000..f3f30f566e6
--- /dev/null
+++ b/dbms/src/Functions/visitParamExtractInt.cpp
@@ -0,0 +1,18 @@
+#include <Functions/FunctionFactory.h>
+#include <Functions/FunctionsVisitParam.h>
+#include <Functions/FunctionsStringSearch.h>
+
+
+namespace DB
+{
+
+struct NameVisitParamExtractInt    { static constexpr auto name = "visitParamExtractInt"; };
+using FunctionVisitParamExtractInt = FunctionsStringSearch<ExtractParamImpl<ExtractNumericType<Int64>>, NameVisitParamExtractInt>;
+
+
+void registerFunctionVisitParamExtractInt(FunctionFactory & factory)
+{
+    factory.registerFunction<FunctionVisitParamExtractInt>();
+}
+
+}
diff --git a/dbms/src/Functions/visitParamExtractRaw.cpp b/dbms/src/Functions/visitParamExtractRaw.cpp
new file mode 100644
index 00000000000..5eeb36286a5
--- /dev/null
+++ b/dbms/src/Functions/visitParamExtractRaw.cpp
@@ -0,0 +1,67 @@
+#include <Functions/FunctionFactory.h>
+#include <Functions/FunctionsVisitParam.h>
+#include <Functions/FunctionsStringSearch.h>
+
+
+namespace DB
+{
+
+struct ExtractRaw
+{
+    using ExpectChars = PODArrayWithStackMemory<char, 64>;
+
+    static void extract(const UInt8 * pos, const UInt8 * end, ColumnString::Chars & res_data)
+    {
+        ExpectChars expects_end;
+        UInt8 current_expect_end = 0;
+
+        for (auto extract_begin = pos; pos != end; ++pos)
+        {
+            if (current_expect_end && *pos == current_expect_end)
+            {
+                expects_end.pop_back();
+                current_expect_end = expects_end.empty() ? 0 : expects_end.back();
+            }
+            else
+            {
+                switch (*pos)
+                {
+                    case '[':
+                        current_expect_end = ']';
+                        expects_end.push_back(current_expect_end);
+                        break;
+                    case '{':
+                        current_expect_end = '}';
+                        expects_end.push_back(current_expect_end);
+                        break;
+                    case '"' :
+                        current_expect_end = '"';
+                        expects_end.push_back(current_expect_end);
+                        break;
+                    case '\\':
+                        /// skip backslash
+                        if (pos + 1 < end && pos[1] == '"')
+                            pos++;
+                        break;
+                    default:
+                        if (!current_expect_end && (*pos == ',' || *pos == '}'))
+                        {
+                            res_data.insert(extract_begin, pos);
+                            return;
+                        }
+                }
+            }
+        }
+    }
+};
+
+struct NameVisitParamExtractRaw    { static constexpr auto name = "visitParamExtractRaw"; };
+using FunctionVisitParamExtractRaw = FunctionsStringSearchToString<ExtractParamToStringImpl<ExtractRaw>, NameVisitParamExtractRaw>;
+
+
+void registerFunctionVisitParamExtractRaw(FunctionFactory & factory)
+{
+    factory.registerFunction<FunctionVisitParamExtractRaw>();
+}
+
+}
diff --git a/dbms/src/Functions/visitParamExtractString.cpp b/dbms/src/Functions/visitParamExtractString.cpp
new file mode 100644
index 00000000000..a6f4b98145d
--- /dev/null
+++ b/dbms/src/Functions/visitParamExtractString.cpp
@@ -0,0 +1,29 @@
+#include <Functions/FunctionFactory.h>
+#include <Functions/FunctionsVisitParam.h>
+#include <Functions/FunctionsStringSearch.h>
+
+
+namespace DB
+{
+
+struct ExtractString
+{
+    static void extract(const UInt8 * pos, const UInt8 * end, ColumnString::Chars & res_data)
+    {
+        size_t old_size = res_data.size();
+        ReadBufferFromMemory in(pos, end - pos);
+        if (!tryReadJSONStringInto(res_data, in))
+            res_data.resize(old_size);
+    }
+};
+
+struct NameVisitParamExtractString { static constexpr auto name = "visitParamExtractString"; };
+using FunctionVisitParamExtractString = FunctionsStringSearchToString<ExtractParamToStringImpl<ExtractString>, NameVisitParamExtractString>;
+
+
+void registerFunctionVisitParamExtractString(FunctionFactory & factory)
+{
+    factory.registerFunction<FunctionVisitParamExtractString>();
+}
+
+}
diff --git a/dbms/src/Functions/visitParamExtractUInt.cpp b/dbms/src/Functions/visitParamExtractUInt.cpp
new file mode 100644
index 00000000000..5e70eed8253
--- /dev/null
+++ b/dbms/src/Functions/visitParamExtractUInt.cpp
@@ -0,0 +1,18 @@
+#include <Functions/FunctionFactory.h>
+#include <Functions/FunctionsVisitParam.h>
+#include <Functions/FunctionsStringSearch.h>
+
+
+namespace DB
+{
+
+struct NameVisitParamExtractUInt   { static constexpr auto name = "visitParamExtractUInt"; };
+using FunctionVisitParamExtractUInt = FunctionsStringSearch<ExtractParamImpl<ExtractNumericType<UInt64>>, NameVisitParamExtractUInt>;
+
+
+void registerFunctionVisitParamExtractUInt(FunctionFactory & factory)
+{
+    factory.registerFunction<FunctionVisitParamExtractUInt>();
+}
+
+}
diff --git a/dbms/src/Functions/visitParamHas.cpp b/dbms/src/Functions/visitParamHas.cpp
new file mode 100644
index 00000000000..5fbedfb4995
--- /dev/null
+++ b/dbms/src/Functions/visitParamHas.cpp
@@ -0,0 +1,28 @@
+#include <Functions/FunctionFactory.h>
+#include <Functions/FunctionsVisitParam.h>
+#include <Functions/FunctionsStringSearch.h>
+
+
+namespace DB
+{
+
+struct HasParam
+{
+    using ResultType = UInt8;
+
+    static UInt8 extract(const UInt8 *, const UInt8 *)
+    {
+        return true;
+    }
+};
+
+struct NameVisitParamHas           { static constexpr auto name = "visitParamHas"; };
+using FunctionVisitParamHas = FunctionsStringSearch<ExtractParamImpl<HasParam>, NameVisitParamHas>;
+
+
+void registerFunctionVisitParamHas(FunctionFactory & factory)
+{
+    factory.registerFunction<FunctionVisitParamHas>();
+}
+
+}
diff --git a/dbms/src/Functions/yandexConsistentHash.cpp b/dbms/src/Functions/yandexConsistentHash.cpp
new file mode 100644
index 00000000000..58617e29af7
--- /dev/null
+++ b/dbms/src/Functions/yandexConsistentHash.cpp
@@ -0,0 +1,34 @@
+#include "FunctionsConsistentHashing.h"
+#include <Functions/FunctionFactory.h>
+
+#include <consistent_hashing.h>
+
+namespace DB
+{
+
+/// An O(1) time and space consistent hash algorithm by Konstantin Oblakov
+struct YandexConsistentHashImpl
+{
+    static constexpr auto name = "yandexConsistentHash";
+
+    using HashType = UInt64;
+    /// Actually it supports UInt64, but it is efficient only if n <= 32768
+    using ResultType = UInt16;
+    using BucketsType = ResultType;
+    static constexpr auto max_buckets = 32768;
+
+    static inline ResultType apply(UInt64 hash, BucketsType n)
+    {
+        return ConsistentHashing(hash, n);
+    }
+};
+
+using FunctionYandexConsistentHash = FunctionConsistentHashImpl<YandexConsistentHashImpl>;
+
+void registerFunctionYandexConsistentHash(FunctionFactory & factory)
+{
+    factory.registerFunction<FunctionYandexConsistentHash>();
+}
+
+}
+