Merge branch 'master' of github.com:ClickHouse/ClickHouse into copier-backquotes

2024-11-22 07:31:57 +00:00 · 2020-10-09 16:26:31 +03:00 · 2020-10-09 16:26:31 +03:00 · 88a5302759
commit 88a5302759
parent a4832ed5ce 7a1aa597e9
618 changed files with 9698 additions and 5590 deletions
--- a/.github/codecov.yml
+++ b/.github/codecov.yml
@ -0,0 +1,17 @@
+codecov:
+  max_report_age: off
+  strict_yaml_branch: "master"
+
+ignore:
+  - "contrib"
+  - "docs"
+  - "benchmark"
+  - "tests"
+  - "docker"
+  - "debian"
+  - "cmake"
+
+comment: false
+
+github_checks:
+  annotations: false
--- a/.gitmodules
+++ b/.gitmodules
@ -107,7 +107,6 @@
 [submodule "contrib/grpc"]
 	path = contrib/grpc
 	url = https://github.com/ClickHouse-Extras/grpc.git
-	branch = v1.25.0
 [submodule "contrib/aws"]
 	path = contrib/aws
 	url = https://github.com/ClickHouse-Extras/aws-sdk-cpp.git
@ -159,7 +158,7 @@
 	url = https://github.com/openldap/openldap.git
 [submodule "contrib/AMQP-CPP"]
 	path = contrib/AMQP-CPP
-	url = https://github.com/CopernicaMarketingSoftware/AMQP-CPP.git
+	url = https://github.com/ClickHouse-Extras/AMQP-CPP.git
 [submodule "contrib/cassandra"]
 	path = contrib/cassandra
 	url = https://github.com/ClickHouse-Extras/cpp-driver.git
@ -186,3 +185,4 @@
 [submodule "contrib/cyrus-sasl"]
 	path = contrib/cyrus-sasl
 	url = https://github.com/cyrusimap/cyrus-sasl
+	branch = cyrus-sasl-2.1
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@ -300,6 +300,11 @@ if (COMPILER_CLANG)
        option(ENABLE_THINLTO "Clang-specific link time optimization" ON)
    endif()

+    # Set new experimental pass manager, it's a performance, build time and binary size win.
+    # Can be removed after https://reviews.llvm.org/D66490 merged and released to at least two versions of clang.
+    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fexperimental-new-pass-manager")
+    set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fexperimental-new-pass-manager")
+
    # We cannot afford to use LTO when compiling unit tests, and it's not enough
    # to only supply -fno-lto at the final linking stage. So we disable it
    # completely.
@ -513,7 +518,13 @@ endif ()
 macro (add_executable target)
    # invoke built-in add_executable
    # explicitly acquire and interpose malloc symbols by clickhouse_malloc
-    _add_executable (${ARGV} $<TARGET_OBJECTS:clickhouse_malloc>)
+    # if GLIBC_COMPATIBILITY is ON and ENABLE_THINLTO is on than provide memcpy symbol explicitly to neutrialize thinlto's libcall generation.
+    if (GLIBC_COMPATIBILITY AND ENABLE_THINLTO)
+        _add_executable (${ARGV} $<TARGET_OBJECTS:clickhouse_malloc> $<TARGET_OBJECTS:clickhouse_memcpy>)
+    else ()
+        _add_executable (${ARGV} $<TARGET_OBJECTS:clickhouse_malloc>)
+    endif ()
+
    get_target_property (type ${target} TYPE)
    if (${type} STREQUAL EXECUTABLE)
        # operator::new/delete for executables (MemoryTracker stuff)
--- a/README.md
+++ b/README.md
@ -17,5 +17,4 @@ ClickHouse is an open-source column-oriented database management system that all

 ## Upcoming Events

-* [ClickHouse for Edge Analytics](https://ones2020.sched.com/event/bWPs) on September 29, 2020.
 * [ClickHouse online meetup (in Russian)](https://clck.ru/R2zB9) on October 1, 2020.
--- a/SECURITY.md
+++ b/SECURITY.md
@ -10,11 +10,14 @@ currently being supported with security updates:
 | 1.x   | :x: |
 | 18.x   | :x:                |
 | 19.x   | :x:                |
-| 19.14   | :white_check_mark: |
 | 20.1   | :x: |
 | 20.3   | :white_check_mark: |
-| 20.4   | :white_check_mark: |
-| 20.5   | :white_check_mark: |
+| 20.4   | :x: |
+| 20.5   | :x: |
+| 20.6   | :x: |
+| 20.7   | :white_check_mark: |
+| 20.8   | :white_check_mark: |
+| 20.9   | :white_check_mark: |

 ## Reporting a Vulnerability

--- a/base/common/LineReader.cpp
+++ b/base/common/LineReader.cpp
@ -38,10 +38,10 @@ bool hasInputData()

 }

-LineReader::Suggest::WordsRange LineReader::Suggest::getCompletions(const String & prefix, size_t prefix_length) const
+std::optional<LineReader::Suggest::WordsRange> LineReader::Suggest::getCompletions(const String & prefix, size_t prefix_length) const
 {
    if (!ready)
-        return std::make_pair(words.end(), words.end());
+        return std::nullopt;

    std::string_view last_word;

--- a/base/common/LineReader.h
+++ b/base/common/LineReader.h
@ -4,6 +4,7 @@

 #include <atomic>
 #include <vector>
+#include <optional>

 class LineReader
 {
@ -18,7 +19,7 @@ public:
        std::atomic<bool> ready{false};

        /// Get iterators for the matched range of words if any.
-        WordsRange getCompletions(const String & prefix, size_t prefix_length) const;
+        std::optional<WordsRange> getCompletions(const String & prefix, size_t prefix_length) const;
    };

    using Patterns = std::vector<const char *>;
--- a/base/common/ReadlineLineReader.cpp
+++ b/base/common/ReadlineLineReader.cpp
@ -30,7 +30,8 @@ static LineReader::Suggest::Words::const_iterator end;
 static void findRange(const char * prefix, size_t prefix_length)
 {
    std::string prefix_str(prefix);
-    std::tie(pos, end) = suggest->getCompletions(prefix_str, prefix_length);
+    if (auto completions = suggest->getCompletions(prefix_str, prefix_length))
+        std::tie(pos, end) = *completions;
 }

 /// Iterates through matched range.
--- a/base/common/ReplxxLineReader.cpp
+++ b/base/common/ReplxxLineReader.cpp
@ -70,8 +70,9 @@ ReplxxLineReader::ReplxxLineReader(

    auto callback = [&suggest] (const String & context, size_t context_size)
    {
-        auto range = suggest.getCompletions(context, context_size);
-        return Replxx::completions_t(range.first, range.second);
+        if (auto range = suggest.getCompletions(context, context_size))
+            return Replxx::completions_t(range->first, range->second);
+        return Replxx::completions_t();
    };

    rx.set_completion_callback(callback);
--- a/base/common/wide_integer_impl.h
+++ b/base/common/wide_integer_impl.h
@ -436,46 +436,94 @@ private:
    }

    template <typename T>
-    constexpr static auto multiply(const integer<Bits, Signed> & lhs, const T & rhs)
+    constexpr static integer<Bits, Signed>
+    multiply(const integer<Bits, Signed> & lhs, const T & rhs)
    {
-        integer<Bits, Signed> res{};
-#if 1
-        integer<Bits, Signed> lhs2 = plus(lhs, shift_left(lhs, 1));
-        integer<Bits, Signed> lhs3 = plus(lhs2, shift_left(lhs, 2));
-#endif
-        for (unsigned i = 0; i < item_count; ++i)
+        if constexpr (Bits == 256 && sizeof(base_type) == 8)
        {
-            base_type rhs_item = get_item(rhs, i);
-            unsigned pos = i * base_bits;
+            /// @sa https://github.com/abseil/abseil-cpp/blob/master/absl/numeric/int128.h
+            using HalfType = unsigned __int128;

-            while (rhs_item)
+            HalfType a01 = (HalfType(lhs.items[little(1)]) << 64) + lhs.items[little(0)];
+            HalfType a23 = (HalfType(lhs.items[little(3)]) << 64) + lhs.items[little(2)];
+            HalfType a0 = lhs.items[little(0)];
+            HalfType a1 = lhs.items[little(1)];
+
+            HalfType b01 = rhs;
+            uint64_t b0 = b01;
+            uint64_t b1 = 0;
+            HalfType b23 = 0;
+            if constexpr (sizeof(T) > 8)
+                b1 = b01 >> 64;
+            if constexpr (sizeof(T) > 16)
+                b23 = (HalfType(rhs.items[little(3)]) << 64) + rhs.items[little(2)];
+
+            HalfType r23 = a23 * b01 + a01 * b23 + a1 * b1;
+            HalfType r01 = a0 * b0;
+            HalfType r12 = (r01 >> 64) + (r23 << 64);
+            HalfType r12_x = a1 * b0;
+
+            integer<Bits, Signed> res;
+            res.items[little(0)] = r01;
+            res.items[little(3)] = r23 >> 64;
+
+            if constexpr (sizeof(T) > 8)
            {
-#if 1 /// optimization
-                if ((rhs_item & 0x7) == 0x7)
-                {
-                    res = plus(res, shift_left(lhs3, pos));
-                    rhs_item >>= 3;
-                    pos += 3;
-                    continue;
-                }
-
-                if ((rhs_item & 0x3) == 0x3)
-                {
-                    res = plus(res, shift_left(lhs2, pos));
-                    rhs_item >>= 2;
-                    pos += 2;
-                    continue;
-                }
-#endif
-                if (rhs_item & 1)
-                    res = plus(res, shift_left(lhs, pos));
-
-                rhs_item >>= 1;
-                ++pos;
+                HalfType r12_y = a0 * b1;
+                r12_x += r12_y;
+                if (r12_x < r12_y)
+                    ++res.items[little(3)];
            }
-        }

-        return res;
+            r12 += r12_x;
+            if (r12 < r12_x)
+                ++res.items[little(3)];
+
+            res.items[little(1)] = r12;
+            res.items[little(2)] = r12 >> 64;
+            return res;
+        }
+        else
+        {
+            integer<Bits, Signed> res{};
+#if 1
+            integer<Bits, Signed> lhs2 = plus(lhs, shift_left(lhs, 1));
+            integer<Bits, Signed> lhs3 = plus(lhs2, shift_left(lhs, 2));
+#endif
+            for (unsigned i = 0; i < item_count; ++i)
+            {
+                base_type rhs_item = get_item(rhs, i);
+                unsigned pos = i * base_bits;
+
+                while (rhs_item)
+                {
+#if 1 /// optimization
+                    if ((rhs_item & 0x7) == 0x7)
+                    {
+                        res = plus(res, shift_left(lhs3, pos));
+                        rhs_item >>= 3;
+                        pos += 3;
+                        continue;
+                    }
+
+                    if ((rhs_item & 0x3) == 0x3)
+                    {
+                        res = plus(res, shift_left(lhs2, pos));
+                        rhs_item >>= 2;
+                        pos += 2;
+                        continue;
+                    }
+#endif
+                    if (rhs_item & 1)
+                        res = plus(res, shift_left(lhs, pos));
+
+                    rhs_item >>= 1;
+                    ++pos;
+                }
+            }
+
+            return res;
+        }
    }

 public:
--- a/base/glibc-compatibility/CMakeLists.txt
+++ b/base/glibc-compatibility/CMakeLists.txt
@ -27,6 +27,10 @@ if (GLIBC_COMPATIBILITY)
        list(APPEND glibc_compatibility_sources musl/getentropy.c)
    endif()

+    add_library (clickhouse_memcpy OBJECT
+        ${ClickHouse_SOURCE_DIR}/contrib/FastMemcpy/memcpy_wrapper.c
+    )
+
    # Need to omit frame pointers to match the performance of glibc
    set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fomit-frame-pointer")

--- a/base/loggers/ExtendedLogChannel.cpp
+++ b/base/loggers/ExtendedLogChannel.cpp
@ -23,6 +23,7 @@ ExtendedLogMessage ExtendedLogMessage::getFrom(const Poco::Message & base)

    msg_ext.time_seconds = static_cast<UInt32>(tv.tv_sec);
    msg_ext.time_microseconds = static_cast<UInt32>(tv.tv_usec);
+    msg_ext.time_in_microseconds = static_cast<UInt64>((tv.tv_sec) * 1000000U + (tv.tv_usec));

    if (current_thread)
    {
--- a/base/loggers/ExtendedLogChannel.h
+++ b/base/loggers/ExtendedLogChannel.h
@ -23,6 +23,7 @@ public:

    uint32_t time_seconds = 0;
    uint32_t time_microseconds = 0;
+    uint64_t time_in_microseconds = 0;

    uint64_t thread_id = 0;
    std::string query_id;
--- a/base/loggers/OwnSplitChannel.cpp
+++ b/base/loggers/OwnSplitChannel.cpp
@ -76,6 +76,7 @@ void OwnSplitChannel::logSplit(const Poco::Message & msg)
        TextLogElement elem;

        elem.event_time = msg_ext.time_seconds;
+        elem.event_time_microseconds = msg_ext.time_in_microseconds;
        elem.microseconds = msg_ext.time_microseconds;

        elem.thread_name = getThreadName();
--- a/base/mysqlxx/Pool.cpp
+++ b/base/mysqlxx/Pool.cpp
@ -21,8 +21,8 @@ void Pool::Entry::incrementRefCount()
 {
    if (!data)
        return;
-    ++data->ref_count;
-    if (data->ref_count == 1)
+    /// First reference, initialize thread
+    if (data->ref_count.fetch_add(1) == 0)
        mysql_thread_init();
 }

@ -30,12 +30,10 @@ void Pool::Entry::decrementRefCount()
 {
    if (!data)
        return;
-    if (data->ref_count > 0)
-    {
-        --data->ref_count;
-        if (data->ref_count == 0)
-            mysql_thread_end();
-    }
+
+    /// We were the last user of this thread, deinitialize it
+    if (data->ref_count.fetch_sub(1) == 1)
+        mysql_thread_end();
 }


--- a/base/mysqlxx/Pool.h
+++ b/base/mysqlxx/Pool.h
@ -3,6 +3,7 @@
 #include <list>
 #include <memory>
 #include <mutex>
+#include <atomic>

 #include <Poco/Exception.h>
 #include <mysqlxx/Connection.h>
@ -35,7 +36,9 @@ protected:
    struct Connection
    {
        mysqlxx::Connection conn;
-        int ref_count = 0;
+        /// Ref count modified in constructor/descructor of Entry
+        /// but also read in pool code.
+        std::atomic<int> ref_count = 0;
    };

 public:
--- a/benchmark/greenplum/result_parser.py
+++ b/benchmark/greenplum/result_parser.py
@ -1,6 +1,6 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
+

-from __future__ import print_function
 import sys
 import json

@ -99,7 +99,7 @@ def gen_html_json(options, arguments):
    tuples = read_stats_file(options, arguments[1])
    print('{')
    print('"system:       GreenPlum(x2),')
-    print('"version":      "%s",' % '4.3.9.1')
+    print(('"version":      "%s",' % '4.3.9.1'))
    print('"data_size":    10000000,')
    print('"time":         "",')
    print('"comments":     "",')
--- a/cmake/Modules/FindgRPC.cmake
+++ b/cmake/Modules/FindgRPC.cmake
@ -0,0 +1,330 @@
+#[[
+Defines the following variables:
+``gRPC_FOUND``
+  Whether the gRPC framework is found
+``gRPC_INCLUDE_DIRS``
+  The include directories of the gRPC framework, including the include directories of the C++ wrapper.
+``gRPC_LIBRARIES``
+  The libraries of the gRPC framework.
+``gRPC_UNSECURE_LIBRARIES``
+  The libraries of the gRPC framework without SSL.
+``_gRPC_CPP_PLUGIN``
+  The plugin for generating gRPC client and server C++ stubs from `.proto` files
+``_gRPC_PYTHON_PLUGIN``
+  The plugin for generating gRPC client and server Python stubs from `.proto` files
+
+The following :prop_tgt:`IMPORTED` targets are also defined:
+``grpc++``
+``grpc++_unsecure``
+``grpc_cpp_plugin``
+``grpc_python_plugin``
+
+Add custom commands to process ``.proto`` files to C++::
+protobuf_generate_grpc_cpp(<SRCS> <HDRS>
+    [DESCRIPTORS <DESC>] [EXPORT_MACRO <MACRO>] [<ARGN>...])
+
+``SRCS``
+    Variable to define with autogenerated source files
+``HDRS``
+    Variable to define with autogenerated header files
+``DESCRIPTORS``
+    Variable to define with autogenerated descriptor files, if requested.
+``EXPORT_MACRO``
+    is a macro which should expand to ``__declspec(dllexport)`` or
+    ``__declspec(dllimport)`` depending on what is being compiled.
+``ARGN``
+    ``.proto`` files
+#]]
+
+# Function to generate C++ files from .proto files.
+# This function is a modified version of the function PROTOBUF_GENERATE_CPP() copied from https://github.com/Kitware/CMake/blob/master/Modules/FindProtobuf.cmake.
+function(PROTOBUF_GENERATE_GRPC_CPP SRCS HDRS)
+  cmake_parse_arguments(protobuf_generate_grpc_cpp "" "EXPORT_MACRO;DESCRIPTORS" "" ${ARGN})
+
+  set(_proto_files "${protobuf_generate_grpc_cpp_UNPARSED_ARGUMENTS}")
+  if(NOT _proto_files)
+    message(SEND_ERROR "Error: PROTOBUF_GENERATE_GRPC_CPP() called without any proto files")
+    return()
+  endif()
+
+  if(PROTOBUF_GENERATE_GRPC_CPP_APPEND_PATH)
+    set(_append_arg APPEND_PATH)
+  endif()
+
+  if(protobuf_generate_grpc_cpp_DESCRIPTORS)
+    set(_descriptors DESCRIPTORS)
+  endif()
+
+  if(DEFINED PROTOBUF_IMPORT_DIRS AND NOT DEFINED Protobuf_IMPORT_DIRS)
+    set(Protobuf_IMPORT_DIRS "${PROTOBUF_IMPORT_DIRS}")
+  endif()
+
+  if(DEFINED Protobuf_IMPORT_DIRS)
+    set(_import_arg IMPORT_DIRS ${Protobuf_IMPORT_DIRS})
+  endif()
+
+  set(_outvar)
+  protobuf_generate_grpc(${_append_arg} ${_descriptors} LANGUAGE cpp EXPORT_MACRO ${protobuf_generate_cpp_EXPORT_MACRO} OUT_VAR _outvar ${_import_arg} PROTOS ${_proto_files})
+
+  set(${SRCS})
+  set(${HDRS})
+  if(protobuf_generate_grpc_cpp_DESCRIPTORS)
+    set(${protobuf_generate_grpc_cpp_DESCRIPTORS})
+  endif()
+
+  foreach(_file ${_outvar})
+    if(_file MATCHES "cc$")
+      list(APPEND ${SRCS} ${_file})
+    elseif(_file MATCHES "desc$")
+      list(APPEND ${protobuf_generate_grpc_cpp_DESCRIPTORS} ${_file})
+    else()
+      list(APPEND ${HDRS} ${_file})
+    endif()
+  endforeach()
+  set(${SRCS} ${${SRCS}} PARENT_SCOPE)
+  set(${HDRS} ${${HDRS}} PARENT_SCOPE)
+  if(protobuf_generate_grpc_cpp_DESCRIPTORS)
+    set(${protobuf_generate_grpc_cpp_DESCRIPTORS} "${${protobuf_generate_grpc_cpp_DESCRIPTORS}}" PARENT_SCOPE)
+  endif()
+endfunction()
+
+# Helper function.
+# This function is a modified version of the function protobuf_generate() copied from https://github.com/Kitware/CMake/blob/master/Modules/FindProtobuf.cmake.
+function(protobuf_generate_grpc)
+  set(_options APPEND_PATH DESCRIPTORS)
+  set(_singleargs LANGUAGE OUT_VAR EXPORT_MACRO PROTOC_OUT_DIR)
+  if(COMMAND target_sources)
+    list(APPEND _singleargs TARGET)
+  endif()
+  set(_multiargs PROTOS IMPORT_DIRS GENERATE_EXTENSIONS)
+
+  cmake_parse_arguments(protobuf_generate_grpc "${_options}" "${_singleargs}" "${_multiargs}" "${ARGN}")
+
+  if(NOT protobuf_generate_grpc_PROTOS AND NOT protobuf_generate_grpc_TARGET)
+    message(SEND_ERROR "Error: protobuf_generate_grpc called without any targets or source files")
+    return()
+  endif()
+
+  if(NOT protobuf_generate_grpc_OUT_VAR AND NOT protobuf_generate_grpc_TARGET)
+    message(SEND_ERROR "Error: protobuf_generate_grpc called without a target or output variable")
+    return()
+  endif()
+
+  if(NOT protobuf_generate_grpc_LANGUAGE)
+    set(protobuf_generate_grpc_LANGUAGE cpp)
+  endif()
+  string(TOLOWER ${protobuf_generate_grpc_LANGUAGE} protobuf_generate_grpc_LANGUAGE)
+
+  if(NOT protobuf_generate_grpc_PROTOC_OUT_DIR)
+    set(protobuf_generate_grpc_PROTOC_OUT_DIR ${CMAKE_CURRENT_BINARY_DIR})
+  endif()
+
+  if(protobuf_generate_grpc_EXPORT_MACRO AND protobuf_generate_grpc_LANGUAGE STREQUAL cpp)
+    set(_dll_export_decl "dllexport_decl=${protobuf_generate_grpc_EXPORT_MACRO}:")
+  endif()
+
+  if(NOT protobuf_generate_grpc_GENERATE_EXTENSIONS)
+    if(protobuf_generate_grpc_LANGUAGE STREQUAL cpp)
+      set(protobuf_generate_grpc_GENERATE_EXTENSIONS .pb.h .pb.cc .grpc.pb.h .grpc.pb.cc)
+    elseif(protobuf_generate_grpc_LANGUAGE STREQUAL python)
+      set(protobuf_generate_grpc_GENERATE_EXTENSIONS _pb2.py)
+    else()
+      message(SEND_ERROR "Error: protobuf_generate_grpc given unknown Language ${LANGUAGE}, please provide a value for GENERATE_EXTENSIONS")
+      return()
+    endif()
+  endif()
+
+  if(NOT protobuf_generate_grpc_PLUGIN)
+    if(protobuf_generate_grpc_LANGUAGE STREQUAL cpp)
+      set(protobuf_generate_grpc_PLUGIN "grpc_cpp_plugin")
+    elseif(protobuf_generate_grpc_LANGUAGE STREQUAL python)
+      set(protobuf_generate_grpc_PLUGIN "grpc_python_plugin")
+    else()
+      message(SEND_ERROR "Error: protobuf_generate_grpc given unknown Language ${LANGUAGE}, please provide a value for PLUGIN")
+      return()
+    endif()
+  endif()
+
+  if(protobuf_generate_grpc_TARGET)
+    get_target_property(_source_list ${protobuf_generate_grpc_TARGET} SOURCES)
+    foreach(_file ${_source_list})
+      if(_file MATCHES "proto$")
+        list(APPEND protobuf_generate_grpc_PROTOS ${_file})
+      endif()
+    endforeach()
+  endif()
+
+  if(NOT protobuf_generate_grpc_PROTOS)
+    message(SEND_ERROR "Error: protobuf_generate_grpc could not find any .proto files")
+    return()
+  endif()
+
+  if(protobuf_generate_grpc_APPEND_PATH)
+    # Create an include path for each file specified
+    foreach(_file ${protobuf_generate_grpc_PROTOS})
+      get_filename_component(_abs_file ${_file} ABSOLUTE)
+      get_filename_component(_abs_path ${_abs_file} PATH)
+      list(FIND _protobuf_include_path ${_abs_path} _contains_already)
+      if(${_contains_already} EQUAL -1)
+          list(APPEND _protobuf_include_path -I ${_abs_path})
+      endif()
+    endforeach()
+  else()
+    set(_protobuf_include_path -I ${CMAKE_CURRENT_SOURCE_DIR})
+  endif()
+
+  foreach(DIR ${protobuf_generate_grpc_IMPORT_DIRS})
+    get_filename_component(ABS_PATH ${DIR} ABSOLUTE)
+    list(FIND _protobuf_include_path ${ABS_PATH} _contains_already)
+    if(${_contains_already} EQUAL -1)
+        list(APPEND _protobuf_include_path -I ${ABS_PATH})
+    endif()
+  endforeach()
+
+  set(_generated_srcs_all)
+  foreach(_proto ${protobuf_generate_grpc_PROTOS})
+    get_filename_component(_abs_file ${_proto} ABSOLUTE)
+    get_filename_component(_abs_dir ${_abs_file} DIRECTORY)
+    get_filename_component(_basename ${_proto} NAME_WE)
+    file(RELATIVE_PATH _rel_dir ${CMAKE_CURRENT_SOURCE_DIR} ${_abs_dir})
+
+    set(_possible_rel_dir)
+    if(NOT protobuf_generate_grpc_APPEND_PATH)
+        set(_possible_rel_dir ${_rel_dir}/)
+    endif()
+
+    set(_generated_srcs)
+    foreach(_ext ${protobuf_generate_grpc_GENERATE_EXTENSIONS})
+      list(APPEND _generated_srcs "${protobuf_generate_grpc_PROTOC_OUT_DIR}/${_possible_rel_dir}${_basename}${_ext}")
+    endforeach()
+
+    if(protobuf_generate_grpc_DESCRIPTORS AND protobuf_generate_grpc_LANGUAGE STREQUAL cpp)
+      set(_descriptor_file "${CMAKE_CURRENT_BINARY_DIR}/${_basename}.desc")
+      set(_dll_desc_out "--descriptor_set_out=${_descriptor_file}")
+      list(APPEND _generated_srcs ${_descriptor_file})
+    endif()
+    list(APPEND _generated_srcs_all ${_generated_srcs})
+
+    add_custom_command(
+      OUTPUT ${_generated_srcs}
+      COMMAND protobuf::protoc
+      ARGS --${protobuf_generate_grpc_LANGUAGE}_out ${_dll_export_decl}${protobuf_generate_grpc_PROTOC_OUT_DIR}
+           --grpc_out ${_dll_export_decl}${protobuf_generate_grpc_PROTOC_OUT_DIR}
+           --plugin=protoc-gen-grpc=$<TARGET_FILE:${protobuf_generate_grpc_PLUGIN}>
+           ${_dll_desc_out} ${_protobuf_include_path} ${_abs_file}
+      DEPENDS ${_abs_file} protobuf::protoc ${protobuf_generate_grpc_PLUGIN}
+      COMMENT "Running ${protobuf_generate_grpc_LANGUAGE} protocol buffer compiler on ${_proto}"
+      VERBATIM)
+  endforeach()
+
+  set_source_files_properties(${_generated_srcs_all} PROPERTIES GENERATED TRUE)
+  if(protobuf_generate_grpc_OUT_VAR)
+    set(${protobuf_generate_grpc_OUT_VAR} ${_generated_srcs_all} PARENT_SCOPE)
+  endif()
+  if(protobuf_generate_grpc_TARGET)
+    target_sources(${protobuf_generate_grpc_TARGET} PRIVATE ${_generated_srcs_all})
+  endif()
+endfunction()
+
+
+# Find the libraries.
+if(gRPC_USE_STATIC_LIBS)
+  # Support preference of static libs by adjusting CMAKE_FIND_LIBRARY_SUFFIXES
+  set(_gRPC_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES ${CMAKE_FIND_LIBRARY_SUFFIXES})
+  if(WIN32)
+    set(CMAKE_FIND_LIBRARY_SUFFIXES .lib .a ${CMAKE_FIND_LIBRARY_SUFFIXES})
+  else()
+    set(CMAKE_FIND_LIBRARY_SUFFIXES .a)
+  endif()
+endif()
+
+find_library(gRPC_LIBRARY NAMES grpc)
+find_library(gRPC_CPP_LIBRARY NAMES grpc++)
+find_library(gRPC_UNSECURE_LIBRARY NAMES grpc_unsecure)
+find_library(gRPC_CPP_UNSECURE_LIBRARY NAMES grpc++_unsecure)
+
+set(gRPC_LIBRARIES)
+if(gRPC_USE_UNSECURE_LIBRARIES)
+  if(gRPC_UNSECURE_LIBRARY)
+    set(gRPC_LIBRARIES ${gRPC_LIBRARIES} ${gRPC_UNSECURE_LIBRARY})
+  endif()
+  if(gRPC_CPP_UNSECURE_LIBRARY)
+    set(gRPC_LIBRARIES ${gRPC_LIBRARIES} ${gRPC_CPP_UNSECURE_LIBRARY})
+  endif()
+else()
+  if(gRPC_LIBRARY)
+    set(gRPC_LIBRARIES ${gRPC_LIBRARIES} ${gRPC_LIBRARY})
+  endif()
+  if(gRPC_CPP_UNSECURE_LIBRARY)
+    set(gRPC_LIBRARIES ${gRPC_LIBRARIES} ${gRPC_CPP_LIBRARY})
+  endif()
+endif()
+
+# Restore the original find library ordering.
+if(gRPC_USE_STATIC_LIBS)
+  set(CMAKE_FIND_LIBRARY_SUFFIXES ${_gRPC_ORIG_CMAKE_FIND_LIBRARY_SUFFIXES})
+endif()
+
+# Find the include directories.
+find_path(gRPC_INCLUDE_DIR grpc/grpc.h)
+find_path(gRPC_CPP_INCLUDE_DIR grpc++/grpc++.h)
+
+if(gRPC_INCLUDE_DIR AND gRPC_CPP_INCLUDE_DIR AND NOT(gRPC_INCLUDE_DIR STREQUAL gRPC_CPP_INCLUDE_DIR))
+  set(gRPC_INCLUDE_DIRS ${gRPC_INCLUDE_DIR} ${gRPC_CPP_INCLUDE_DIR})
+elseif(gRPC_INCLUDE_DIR)
+  set(gRPC_INCLUDE_DIRS ${gRPC_INCLUDE_DIR})
+else()
+  set(gRPC_INCLUDE_DIRS ${gRPC_CPP_INCLUDE_DIR})
+endif()
+
+# Get full path to plugin.
+find_program(_gRPC_CPP_PLUGIN
+             NAMES grpc_cpp_plugin
+             DOC "The plugin for generating gRPC client and server C++ stubs from `.proto` files") 
+
+find_program(_gRPC_PYTHON_PLUGIN
+             NAMES grpc_python_plugin
+             DOC "The plugin for generating gRPC client and server Python stubs from `.proto` files")
+
+# Add imported targets.
+if(gRPC_CPP_LIBRARY AND NOT TARGET grpc++)
+  add_library(grpc++ UNKNOWN IMPORTED)
+  set_target_properties(grpc++ PROPERTIES
+                        IMPORTED_LOCATION "${gRPC_CPP_LIBRARY}")
+  set_target_properties(grpc++ PROPERTIES
+                        INTERFACE_INCLUDE_DIRECTORIES ${gRPC_INCLUDE_DIRS})
+endif()
+
+if(gRPC_CPP_UNSECURE_LIBRARY AND NOT TARGET grpc++_unsecure)
+  add_library(grpc++_unsecure UNKNOWN IMPORTED)
+  set_target_properties(grpc++_unsecure PROPERTIES
+                        IMPORTED_LOCATION "${gRPC_CPP_UNSECURE_LIBRARY}")
+  set_target_properties(grpc++_unsecure PROPERTIES
+                        INTERFACE_INCLUDE_DIRECTORIES ${gRPC_INCLUDE_DIRS})
+endif()
+
+if(gRPC_CPP_PLUGIN AND NOT TARGET grpc_cpp_plugin)
+  add_executable(grpc_cpp_plugin IMPORTED)
+  set_target_properties(grpc_cpp_plugin PROPERTIES
+                        IMPORTED_LOCATION "${gRPC_CPP_PLUGIN}")
+endif()
+
+if(gRPC_PYTHON_PLUGIN AND NOT TARGET grpc_python_plugin)
+  add_executable(grpc_python_plugin IMPORTED)
+  set_target_properties(grpc_python_plugin PROPERTIES
+                        IMPORTED_LOCATION "${gRPC_PYTHON_PLUGIN}")
+endif()
+
+#include(FindPackageHandleStandardArgs.cmake)
+FIND_PACKAGE_HANDLE_STANDARD_ARGS(gRPC
+                                  REQUIRED_VARS gRPC_LIBRARY gRPC_CPP_LIBRARY gRPC_UNSECURE_LIBRARY gRPC_CPP_UNSECURE_LIBRARY
+                                                gRPC_INCLUDE_DIR gRPC_CPP_INCLUDE_DIR _gRPC_CPP_PLUGIN _gRPC_PYTHON_PLUGIN)
+
+if(gRPC_FOUND)
+  if(gRPC_DEBUG)
+    message(STATUS "gRPC: INCLUDE_DIRS=${gRPC_INCLUDE_DIRS}")
+    message(STATUS "gRPC: LIBRARIES=${gRPC_LIBRARIES}")
+    message(STATUS "gRPC: CPP_PLUGIN=${_gRPC_CPP_PLUGIN}")
+    message(STATUS "gRPC: PYTHON_PLUGIN=${_gRPC_PYTHON_PLUGIN}")
+  endif()
+endif()
--- a/cmake/analysis.cmake
+++ b/cmake/analysis.cmake
@ -6,7 +6,7 @@ if (ENABLE_CLANG_TIDY)
        message(FATAL_ERROR "clang-tidy requires CMake version at least 3.6.")
    endif()

-    find_program (CLANG_TIDY_PATH NAMES "clang-tidy" "clang-tidy-10" "clang-tidy-9" "clang-tidy-8")
+    find_program (CLANG_TIDY_PATH NAMES "clang-tidy" "clang-tidy-11" "clang-tidy-10" "clang-tidy-9" "clang-tidy-8")

    if (CLANG_TIDY_PATH)
        message(STATUS
--- a/cmake/find/grpc.cmake
+++ b/cmake/find/grpc.cmake
@ -1,45 +1,65 @@
-option (ENABLE_GRPC "Use gRPC" ${ENABLE_LIBRARIES})
+option(ENABLE_GRPC "Use gRPC" ${ENABLE_LIBRARIES})

-if (NOT ENABLE_GRPC)
-    if (USE_INTERNAL_GRPC_LIBRARY)
-        message (${RECONFIGURE_MESSAGE_LEVEL} "Cannot use internal gRPC library with ENABLE_GRPC=OFF")
-    endif()
-    return()
+if(NOT ENABLE_GRPC)
+  if(USE_INTERNAL_GRPC_LIBRARY)
+    message(${RECONFIGURE_MESSAGE_LEVEL} "Cannot use internal gRPC library with ENABLE_GRPC=OFF")
+  endif()
+  return()
 endif()

-option (USE_INTERNAL_GRPC_LIBRARY
-        "Set to FALSE to use system gRPC library instead of bundled. (Experimental. Set to OFF on your own risk)"
-        ${NOT_UNBUNDLED})
-
-if (NOT USE_INTERNAL_GRPC_LIBRARY)
-    find_package(grpc)
-    if (NOT GRPC_FOUND)
-        find_path(GRPC_INCLUDE_DIR grpcpp/grpcpp.h)
-        find_library(GRPC_LIBRARY grpc++)
-    endif ()
-
-    if (GRPC_INCLUDE_DIR AND GRPC_LIBRARY)
-        set (USE_GRPC ON)
-    else()
-        message (${RECONFIGURE_MESSAGE_LEVEL} "Can't find system gRPC")
-    endif()
+if(NOT USE_PROTOBUF)
+  message(WARNING "Cannot use gRPC library without protobuf")
 endif()

-if (NOT USE_GRPC)
-    if (NOT EXISTS "${ClickHouse_SOURCE_DIR}/contrib/grpc/include/grpc++/grpc++.h")
-        message (WARNING "submodule contrib/grpc is missing. To fix try run: \n git submodule update --init --recursive")
-        message (${RECONFIGURE_MESSAGE_LEVEL} "Can't find internal gRPC")
-        set (USE_INTERNAL_GRPC_LIBRARY OFF)
-    elseif (NOT USE_PROTOBUF)
-        message (WARNING "gRPC requires protobuf which is disabled")
-        message (${RECONFIGURE_MESSAGE_LEVEL} "Will not use internal gRPC without protobuf")
-        set (USE_INTERNAL_GRPC_LIBRARY OFF)
-    else()
-        set (GRPC_INCLUDE_DIR "${ClickHouse_SOURCE_DIR}/contrib/grpc/include")
-        set (GRPC_LIBRARY "libgrpc++")
-        set (USE_GRPC ON)
-        set (USE_INTERNAL_GRPC_LIBRARY ON)
-    endif()
+# Normally we use the internal gRPC framework.
+# You can set USE_INTERNAL_GRPC_LIBRARY to OFF to force using the external gRPC framework, which should be installed in the system in this case.
+# The external gRPC framework can be installed in the system by running
+# sudo apt-get install libgrpc++-dev protobuf-compiler-grpc
+option(USE_INTERNAL_GRPC_LIBRARY "Set to FALSE to use system gRPC library instead of bundled. (Experimental. Set to OFF on your own risk)" ${NOT_UNBUNDLED})
+
+if(NOT EXISTS "${ClickHouse_SOURCE_DIR}/contrib/grpc/CMakeLists.txt")
+  if(USE_INTERNAL_GRPC_LIBRARY)
+    message(WARNING "submodule contrib/grpc is missing. to fix try run: \n git submodule update --init --recursive")
+    message(${RECONFIGURE_MESSAGE_LEVEL} "Can't use internal grpc")
+    set(USE_INTERNAL_GRPC_LIBRARY 0)
+  endif()
+  set(MISSING_INTERNAL_GRPC_LIBRARY 1)
 endif()

-message (STATUS "Using gRPC=${USE_GRPC}: ${GRPC_INCLUDE_DIR} : ${GRPC_LIBRARY}")
+if(USE_SSL)
+  set(gRPC_USE_UNSECURE_LIBRARIES FALSE)
+else()
+  set(gRPC_USE_UNSECURE_LIBRARIES TRUE)
+endif()
+
+if(NOT USE_INTERNAL_GRPC_LIBRARY)
+  find_package(gRPC)
+  if(NOT gRPC_INCLUDE_DIRS OR NOT gRPC_LIBRARIES)
+    message(${RECONFIGURE_MESSAGE_LEVEL} "Can't find system gRPC library")
+    set(EXTERNAL_GRPC_LIBRARY_FOUND 0)
+  elseif(NOT _gRPC_CPP_PLUGIN)
+    message(${RECONFIGURE_MESSAGE_LEVEL} "Can't find system grcp_cpp_plugin")
+    set(EXTERNAL_GRPC_LIBRARY_FOUND 0)
+  else()
+    set(EXTERNAL_GRPC_LIBRARY_FOUND 1)
+    set(USE_GRPC 1)
+  endif()
+endif()
+
+if(NOT EXTERNAL_GRPC_LIBRARY_FOUND AND NOT MISSING_INTERNAL_GRPC_LIBRARY)
+  set(gRPC_INCLUDE_DIRS "${ClickHouse_SOURCE_DIR}/contrib/grpc/include")
+  if(gRPC_USE_UNSECURE_LIBRARIES)
+    set(gRPC_LIBRARIES grpc_unsecure grpc++_unsecure)
+  else()
+    set(gRPC_LIBRARIES grpc grpc++)
+  endif()
+  set(_gRPC_CPP_PLUGIN $<TARGET_FILE:grpc_cpp_plugin>)
+  set(_gRPC_PROTOC_EXECUTABLE $<TARGET_FILE:protobuf::protoc>)
+
+  include("${ClickHouse_SOURCE_DIR}/contrib/grpc-cmake/protobuf_generate_grpc.cmake")
+
+  set(USE_INTERNAL_GRPC_LIBRARY 1)
+  set(USE_GRPC 1)
+endif()
+
+message(STATUS "Using gRPC=${USE_GRPC}: ${gRPC_INCLUDE_DIRS} : ${gRPC_LIBRARIES} : ${_gRPC_CPP_PLUGIN}")
--- a/cmake/find/llvm.cmake
+++ b/cmake/find/llvm.cmake
@ -26,7 +26,7 @@ endif ()
 if (NOT USE_INTERNAL_LLVM_LIBRARY)
    set (LLVM_PATHS "/usr/local/lib/llvm")

-    foreach(llvm_v 9 8)
+    foreach(llvm_v 10 9 8)
        if (NOT LLVM_FOUND)
            find_package (LLVM ${llvm_v} CONFIG PATHS ${LLVM_PATHS})
        endif ()
--- a/cmake/find/protobuf.cmake
+++ b/cmake/find/protobuf.cmake
@ -1,57 +1,62 @@
 option(ENABLE_PROTOBUF "Enable protobuf" ${ENABLE_LIBRARIES})

 if(NOT ENABLE_PROTOBUF)
-    if(USE_INTERNAL_PROTOBUF_LIBRARY)
-        message (${RECONFIGURE_MESSAGE_LEVEL} "Can't use internal protobuf with ENABLE_PROTOBUF=OFF")
-    endif()
-    return()
+  if(USE_INTERNAL_PROTOBUF_LIBRARY)
+    message(${RECONFIGURE_MESSAGE_LEVEL} "Can't use internal protobuf with ENABLE_PROTOBUF=OFF")
+  endif()
+  return()
 endif()

-option(USE_INTERNAL_PROTOBUF_LIBRARY "Set to FALSE to use system protobuf instead of bundled" ${NOT_UNBUNDLED})
+# Normally we use the internal protobuf library.
+# You can set USE_INTERNAL_PROTOBUF_LIBRARY to OFF to force using the external protobuf library, which should be installed in the system in this case.
+# The external protobuf library can be installed in the system by running
+# sudo apt-get install libprotobuf-dev protobuf-compiler libprotoc-dev
+option(USE_INTERNAL_PROTOBUF_LIBRARY "Set to FALSE to use system protobuf instead of bundled. (Experimental. Set to OFF on your own risk)" ${NOT_UNBUNDLED})

 if(NOT EXISTS "${ClickHouse_SOURCE_DIR}/contrib/protobuf/cmake/CMakeLists.txt")
-   if(USE_INTERNAL_PROTOBUF_LIBRARY)
-       message(WARNING "submodule contrib/protobuf is missing. to fix try run: \n git submodule update --init --recursive")
-       message (${RECONFIGURE_MESSAGE_LEVEL} "Can't use internal protobuf")
-       set(USE_INTERNAL_PROTOBUF_LIBRARY 0)
-   endif()
-   set(MISSING_INTERNAL_PROTOBUF_LIBRARY 1)
+  if(USE_INTERNAL_PROTOBUF_LIBRARY)
+    message(WARNING "submodule contrib/protobuf is missing. to fix try run: \n git submodule update --init --recursive")
+    message(${RECONFIGURE_MESSAGE_LEVEL} "Can't use internal protobuf")
+    set(USE_INTERNAL_PROTOBUF_LIBRARY 0)
+  endif()
+  set(MISSING_INTERNAL_PROTOBUF_LIBRARY 1)
 endif()

 if(NOT USE_INTERNAL_PROTOBUF_LIBRARY)
-    find_package(Protobuf)
-    if (Protobuf_LIBRARY AND Protobuf_INCLUDE_DIR AND Protobuf_PROTOC_EXECUTABLE)
-        set(EXTERNAL_PROTOBUF_LIBRARY_FOUND 1)
-        set(USE_PROTOBUF 1)
-    else()
-        message (${RECONFIGURE_MESSAGE_LEVEL} "Can't find system protobuf")
-        set(EXTERNAL_PROTOBUF_LIBRARY_FOUND 0)
-    endif()
+  find_package(Protobuf)
+  if(NOT Protobuf_INCLUDE_DIR OR NOT Protobuf_LIBRARY)
+    message(${RECONFIGURE_MESSAGE_LEVEL} "Can't find system protobuf library")
+    set(EXTERNAL_PROTOBUF_LIBRARY_FOUND 0)
+  elseif(NOT Protobuf_PROTOC_EXECUTABLE)
+    message(${RECONFIGURE_MESSAGE_LEVEL} "Can't find system protobuf compiler")
+    set(EXTERNAL_PROTOBUF_LIBRARY_FOUND 0)
+  else()
+    set(EXTERNAL_PROTOBUF_LIBRARY_FOUND 1)
+    set(USE_PROTOBUF 1)
+  endif()
 endif()

-if (NOT EXTERNAL_PROTOBUF_LIBRARY_FOUND AND NOT MISSING_INTERNAL_PROTOBUF_LIBRARY)
-    set(Protobuf_INCLUDE_DIR "${ClickHouse_SOURCE_DIR}/contrib/protobuf/src")
+if(NOT EXTERNAL_PROTOBUF_LIBRARY_FOUND AND NOT MISSING_INTERNAL_PROTOBUF_LIBRARY)
+  set(Protobuf_INCLUDE_DIR "${ClickHouse_SOURCE_DIR}/contrib/protobuf/src")
+  set(Protobuf_LIBRARY libprotobuf)
+  set(Protobuf_PROTOC_EXECUTABLE "$<TARGET_FILE:protoc>")
+  set(Protobuf_PROTOC_LIBRARY libprotoc)

-    set(USE_PROTOBUF 1)
-    set(USE_INTERNAL_PROTOBUF_LIBRARY 1)
-    set(Protobuf_LIBRARY libprotobuf)
-    set(Protobuf_PROTOC_LIBRARY libprotoc)
-    set(Protobuf_LITE_LIBRARY libprotobuf-lite)
+  include("${ClickHouse_SOURCE_DIR}/contrib/protobuf-cmake/protobuf_generate.cmake")

-    set(Protobuf_PROTOC_EXECUTABLE "$<TARGET_FILE:protoc>")
+  set(USE_INTERNAL_PROTOBUF_LIBRARY 1)
+  set(USE_PROTOBUF 1)
 endif()

 if(OS_FREEBSD AND SANITIZE STREQUAL "address")
-    # ../contrib/protobuf/src/google/protobuf/arena_impl.h:45:10: fatal error: 'sanitizer/asan_interface.h' file not found
-    # #include <sanitizer/asan_interface.h>
-    if(LLVM_INCLUDE_DIRS)
-        set(Protobuf_INCLUDE_DIR "${Protobuf_INCLUDE_DIR}" ${LLVM_INCLUDE_DIRS})
-    else()
-        message (${RECONFIGURE_MESSAGE_LEVEL} "Can't use protobuf on FreeBSD with address sanitizer without LLVM")
-        set(USE_PROTOBUF 0)
-    endif()
+  # ../contrib/protobuf/src/google/protobuf/arena_impl.h:45:10: fatal error: 'sanitizer/asan_interface.h' file not found
+  # #include <sanitizer/asan_interface.h>
+  if(LLVM_INCLUDE_DIRS)
+    set(Protobuf_INCLUDE_DIR "${Protobuf_INCLUDE_DIR}" ${LLVM_INCLUDE_DIRS})
+  else()
+    message(${RECONFIGURE_MESSAGE_LEVEL} "Can't use protobuf on FreeBSD with address sanitizer without LLVM")
+    set(USE_PROTOBUF 0)
+  endif()
 endif()

-include ("${ClickHouse_SOURCE_DIR}/cmake/protobuf_generate_cpp.cmake")
-
-message(STATUS "Using protobuf=${USE_PROTOBUF}: ${Protobuf_INCLUDE_DIR} : ${Protobuf_LIBRARY} : ${Protobuf_PROTOC_EXECUTABLE}")
+message(STATUS "Using protobuf=${USE_PROTOBUF}: ${Protobuf_INCLUDE_DIR} : ${Protobuf_LIBRARY} : ${Protobuf_PROTOC_EXECUTABLE} : ${Protobuf_PROTOC_LIBRARY}")
--- a/cmake/find/rdkafka.cmake
+++ b/cmake/find/rdkafka.cmake
@ -14,10 +14,10 @@ if (NOT ENABLE_RDKAFKA)
    return()
 endif()

-if (NOT ARCH_ARM AND USE_LIBGSASL)
+if (NOT ARCH_ARM)
    option (USE_INTERNAL_RDKAFKA_LIBRARY "Set to FALSE to use system librdkafka instead of the bundled" ${NOT_UNBUNDLED})
 elseif(USE_INTERNAL_RDKAFKA_LIBRARY)
-    message (${RECONFIGURE_MESSAGE_LEVEL} "Can't use internal librdkafka with ARCH_ARM=${ARCH_ARM} AND USE_LIBGSASL=${USE_LIBGSASL}")
+    message (${RECONFIGURE_MESSAGE_LEVEL} "Can't use internal librdkafka with ARCH_ARM=${ARCH_ARM}")
 endif ()

 if (NOT EXISTS "${ClickHouse_SOURCE_DIR}/contrib/cppkafka/CMakeLists.txt")
--- a/cmake/protobuf_generate_cpp.cmake
+++ b/cmake/protobuf_generate_cpp.cmake
@ -1,172 +0,0 @@
-# This file declares functions adding custom commands for generating C++ files from *.proto files:
-# function (protobuf_generate_cpp SRCS HDRS)
-# function (protobuf_generate_grpc_cpp SRCS HDRS)
-
-if (NOT USE_PROTOBUF)
-    message (WARNING "Could not use protobuf_generate_cpp() without the protobuf library")
-    return()
-endif()
-
-if (NOT DEFINED PROTOBUF_PROTOC_EXECUTABLE)
-    set (PROTOBUF_PROTOC_EXECUTABLE "$<TARGET_FILE:protoc>")
-endif()
-
-if (NOT DEFINED GRPC_CPP_PLUGIN_EXECUTABLE)
-    set (GRPC_CPP_PLUGIN_EXECUTABLE $<TARGET_FILE:grpc_cpp_plugin>)
-endif()
-
-if (NOT DEFINED PROTOBUF_GENERATE_CPP_APPEND_PATH)
-    set (PROTOBUF_GENERATE_CPP_APPEND_PATH TRUE)
-endif()
-
-
-function(protobuf_generate_cpp_impl SRCS HDRS MODES OUTPUT_FILE_EXTS PLUGIN)
-    if(NOT ARGN)
-        message(SEND_ERROR "Error: protobuf_generate_cpp() called without any proto files")
-        return()
-    endif()
-
-    if(PROTOBUF_GENERATE_CPP_APPEND_PATH)
-        # Create an include path for each file specified
-        foreach(FIL ${ARGN})
-            get_filename_component(ABS_FIL ${FIL} ABSOLUTE)
-            get_filename_component(ABS_PATH ${ABS_FIL} PATH)
-            list(FIND protobuf_include_path ${ABS_PATH} _contains_already)
-            if(${_contains_already} EQUAL -1)
-                list(APPEND protobuf_include_path -I ${ABS_PATH})
-            endif()
-        endforeach()
-    else()
-        set(protobuf_include_path -I ${CMAKE_CURRENT_SOURCE_DIR})
-    endif()
-
-    if(DEFINED PROTOBUF_IMPORT_DIRS AND NOT DEFINED Protobuf_IMPORT_DIRS)
-        set(Protobuf_IMPORT_DIRS "${PROTOBUF_IMPORT_DIRS}")
-    endif()
-
-    if(DEFINED Protobuf_IMPORT_DIRS)
-        foreach(DIR ${Protobuf_IMPORT_DIRS})
-            get_filename_component(ABS_PATH ${DIR} ABSOLUTE)
-            list(FIND protobuf_include_path ${ABS_PATH} _contains_already)
-            if(${_contains_already} EQUAL -1)
-                list(APPEND protobuf_include_path -I ${ABS_PATH})
-            endif()
-        endforeach()
-    endif()
-
-    set (intermediate_dir ${CMAKE_CURRENT_BINARY_DIR}/intermediate)
-    file (MAKE_DIRECTORY ${intermediate_dir})
-
-    set (protoc_args)
-    foreach (mode ${MODES})
-        list (APPEND protoc_args "--${mode}_out" ${intermediate_dir})
-    endforeach()
-    if (PLUGIN)
-        list (APPEND protoc_args "--plugin=${PLUGIN}")
-    endif()
-
-    set(srcs)
-    set(hdrs)
-    set(all_intermediate_outputs)
-
-    foreach(input_name ${ARGN})
-        get_filename_component(abs_name ${input_name} ABSOLUTE)
-        get_filename_component(name ${input_name} NAME_WE)
-        
-        set (intermediate_outputs)
-        foreach (ext ${OUTPUT_FILE_EXTS})
-            set (filename "${name}${ext}")
-            set (output "${CMAKE_CURRENT_BINARY_DIR}/${filename}")
-            set (intermediate_output "${intermediate_dir}/${filename}")
-            list (APPEND intermediate_outputs "${intermediate_output}")
-            list (APPEND all_intermediate_outputs "${intermediate_output}")
-
-            if (${ext} MATCHES ".*\\.h")
-                list(APPEND hdrs "${output}")
-            else()
-                list(APPEND srcs "${output}")
-            endif()
-
-            add_custom_command(
-                OUTPUT ${output}
-                COMMAND ${CMAKE_COMMAND} -DPROTOBUF_GENERATE_CPP_SCRIPT_MODE=1 -DUSE_PROTOBUF=1 -DDIR=${CMAKE_CURRENT_BINARY_DIR} -DFILENAME=${filename} -DCOMPILER_ID=${CMAKE_CXX_COMPILER_ID} -P ${ClickHouse_SOURCE_DIR}/cmake/protobuf_generate_cpp.cmake
-                DEPENDS ${intermediate_output})
-        endforeach()
-
-        add_custom_command(
-            OUTPUT ${intermediate_outputs}
-            COMMAND ${Protobuf_PROTOC_EXECUTABLE}
-            ARGS ${protobuf_include_path} ${protoc_args} ${abs_name}
-            DEPENDS ${abs_name} ${Protobuf_PROTOC_EXECUTABLE} ${PLUGIN}
-            COMMENT "Running C++ protocol buffer compiler on ${name}"
-            VERBATIM )
-    endforeach()
-
-    set_source_files_properties(${srcs} ${hdrs} ${all_intermediate_outputs} PROPERTIES GENERATED TRUE)
-    set(${SRCS} ${srcs} PARENT_SCOPE)
-    set(${HDRS} ${hdrs} PARENT_SCOPE)
-endfunction()
-
-
-if (PROTOBUF_GENERATE_CPP_SCRIPT_MODE)
-    set (output "${DIR}/${FILENAME}")
-    set (intermediate_dir ${DIR}/intermediate)
-    set (intermediate_output "${intermediate_dir}/${FILENAME}")
-
-    if (COMPILER_ID MATCHES "Clang")
-        set (pragma_push "#pragma clang diagnostic push\n")
-        set (pragma_pop "#pragma clang diagnostic pop\n")
-        set (pragma_disable_warnings "#pragma clang diagnostic ignored \"-Weverything\"\n")
-    elseif (COMPILER_ID MATCHES "GNU")
-        set (pragma_push "#pragma GCC diagnostic push\n")
-        set (pragma_pop "#pragma GCC diagnostic pop\n")
-        set (pragma_disable_warnings "#pragma GCC diagnostic ignored \"-Wall\"\n"
-                                     "#pragma GCC diagnostic ignored \"-Wextra\"\n"
-                                     "#pragma GCC diagnostic ignored \"-Warray-bounds\"\n"
-                                     "#pragma GCC diagnostic ignored \"-Wold-style-cast\"\n"
-                                     "#pragma GCC diagnostic ignored \"-Wshadow\"\n"
-                                     "#pragma GCC diagnostic ignored \"-Wsuggest-override\"\n"
-                                     "#pragma GCC diagnostic ignored \"-Wcast-qual\"\n"
-                                     "#pragma GCC diagnostic ignored \"-Wunused-parameter\"\n")
-    endif()
-
-    if (${FILENAME} MATCHES ".*\\.h")
-        file(WRITE "${output}"
-            "#pragma once\n"
-            ${pragma_push}
-            ${pragma_disable_warnings}
-            "#include \"${intermediate_output}\"\n"
-            ${pragma_pop}
-        )
-    else()
-        file(WRITE "${output}"
-            ${pragma_disable_warnings}
-            "#include \"${intermediate_output}\"\n"
-        )
-    endif()
-    return()
-endif()
-
-
-function(protobuf_generate_cpp SRCS HDRS)
-    set (modes cpp)
-    set (output_file_exts ".pb.cc" ".pb.h")
-    set (plugin)
-
-    protobuf_generate_cpp_impl(srcs hdrs "${modes}" "${output_file_exts}" "${plugin}" ${ARGN})
-
-    set(${SRCS} ${srcs} PARENT_SCOPE)
-    set(${HDRS} ${hdrs} PARENT_SCOPE)
-endfunction()
-
-
-function(protobuf_generate_grpc_cpp SRCS HDRS)
-    set (modes cpp grpc)
-    set (output_file_exts ".pb.cc" ".pb.h" ".grpc.pb.cc" ".grpc.pb.h")
-    set (plugin "protoc-gen-grpc=${GRPC_CPP_PLUGIN_EXECUTABLE}")
-
-    protobuf_generate_cpp_impl(srcs hdrs "${modes}" "${output_file_exts}" "${plugin}" ${ARGN})
-
-    set(${SRCS} ${srcs} PARENT_SCOPE)
-    set(${HDRS} ${hdrs} PARENT_SCOPE)
-endfunction()
--- a/cmake/warnings.cmake
+++ b/cmake/warnings.cmake
@ -31,6 +31,7 @@ if (COMPILER_CLANG)
    add_warning(pedantic)
    no_warning(vla-extension)
    no_warning(zero-length-array)
+    no_warning(c11-extensions)

    add_warning(comma)
    add_warning(conditional-uninitialized)
--- a/contrib/AMQP-CPP
+++ b/contrib/AMQP-CPP
@ -1 +1 @@
-Subproject commit 1c08399ab0ab9e4042ef8e2bbe9e208e5dcbc13b
+Subproject commit d63e1f016582e9faaaf279aa24513087a07bc6e7
--- a/contrib/FastMemcpy/memcpy_wrapper.c
+++ b/contrib/FastMemcpy/memcpy_wrapper.c
@ -1,4 +1,4 @@
-#include <FastMemcpy.h>
+#include "FastMemcpy.h"

 void * memcpy(void * __restrict destination, const void * __restrict source, size_t size)
 {
--- a/contrib/amqpcpp-cmake/CMakeLists.txt
+++ b/contrib/amqpcpp-cmake/CMakeLists.txt
@ -16,6 +16,7 @@ set (SRCS
    ${LIBRARY_DIR}/src/flags.cpp
    ${LIBRARY_DIR}/src/linux_tcp/openssl.cpp
    ${LIBRARY_DIR}/src/linux_tcp/tcpconnection.cpp
+    ${LIBRARY_DIR}/src/inbuffer.cpp
    ${LIBRARY_DIR}/src/receivedframe.cpp
    ${LIBRARY_DIR}/src/table.cpp
    ${LIBRARY_DIR}/src/watchable.cpp
--- a/contrib/cyrus-sasl
+++ b/contrib/cyrus-sasl
@ -1 +1 @@
-Subproject commit 6054630889fd1cd8d0659573d69badcee1e23a00
+Subproject commit 9995bf9d8e14f58934d9313ac64f13780d6dd3c9
--- a/contrib/grpc
+++ b/contrib/grpc
@ -1 +1 @@
-Subproject commit 8aea4e168e78f3eb9828080740fc8cb73d53bf79
+Subproject commit a6570b863cf76c9699580ba51c7827d5bffaac43
--- a/contrib/grpc-cmake/CMakeLists.txt
+++ b/contrib/grpc-cmake/CMakeLists.txt
--- a/contrib/grpc-cmake/protobuf_generate_grpc.cmake
+++ b/contrib/grpc-cmake/protobuf_generate_grpc.cmake
@ -0,0 +1,207 @@
+#[[
+Add custom commands to process ``.proto`` files to C++::
+protobuf_generate_grpc_cpp(<SRCS> <HDRS>
+    [DESCRIPTORS <DESC>] [EXPORT_MACRO <MACRO>] [<ARGN>...])
+
+``SRCS``
+    Variable to define with autogenerated source files
+``HDRS``
+    Variable to define with autogenerated header files
+``DESCRIPTORS``
+    Variable to define with autogenerated descriptor files, if requested.
+``EXPORT_MACRO``
+    is a macro which should expand to ``__declspec(dllexport)`` or
+    ``__declspec(dllimport)`` depending on what is being compiled.
+``ARGN``
+    ``.proto`` files
+#]]
+
+# Function to generate C++ files from .proto files.
+# This function is a modified version of the function PROTOBUF_GENERATE_CPP() copied from https://github.com/Kitware/CMake/blob/master/Modules/FindProtobuf.cmake.
+function(PROTOBUF_GENERATE_GRPC_CPP SRCS HDRS)
+  cmake_parse_arguments(protobuf_generate_grpc_cpp "" "EXPORT_MACRO;DESCRIPTORS" "" ${ARGN})
+
+  set(_proto_files "${protobuf_generate_grpc_cpp_UNPARSED_ARGUMENTS}")
+  if(NOT _proto_files)
+    message(SEND_ERROR "Error: PROTOBUF_GENERATE_GRPC_CPP() called without any proto files")
+    return()
+  endif()
+
+  if(PROTOBUF_GENERATE_GRPC_CPP_APPEND_PATH)
+    set(_append_arg APPEND_PATH)
+  endif()
+
+  if(protobuf_generate_grpc_cpp_DESCRIPTORS)
+    set(_descriptors DESCRIPTORS)
+  endif()
+
+  if(DEFINED PROTOBUF_IMPORT_DIRS AND NOT DEFINED Protobuf_IMPORT_DIRS)
+    set(Protobuf_IMPORT_DIRS "${PROTOBUF_IMPORT_DIRS}")
+  endif()
+
+  if(DEFINED Protobuf_IMPORT_DIRS)
+    set(_import_arg IMPORT_DIRS ${Protobuf_IMPORT_DIRS})
+  endif()
+
+  set(_outvar)
+  protobuf_generate_grpc(${_append_arg} ${_descriptors} LANGUAGE cpp EXPORT_MACRO ${protobuf_generate_cpp_EXPORT_MACRO} OUT_VAR _outvar ${_import_arg} PROTOS ${_proto_files})
+
+  set(${SRCS})
+  set(${HDRS})
+  if(protobuf_generate_grpc_cpp_DESCRIPTORS)
+    set(${protobuf_generate_grpc_cpp_DESCRIPTORS})
+  endif()
+
+  foreach(_file ${_outvar})
+    if(_file MATCHES "cc$")
+      list(APPEND ${SRCS} ${_file})
+    elseif(_file MATCHES "desc$")
+      list(APPEND ${protobuf_generate_grpc_cpp_DESCRIPTORS} ${_file})
+    else()
+      list(APPEND ${HDRS} ${_file})
+    endif()
+  endforeach()
+  set(${SRCS} ${${SRCS}} PARENT_SCOPE)
+  set(${HDRS} ${${HDRS}} PARENT_SCOPE)
+  if(protobuf_generate_grpc_cpp_DESCRIPTORS)
+    set(${protobuf_generate_grpc_cpp_DESCRIPTORS} "${${protobuf_generate_grpc_cpp_DESCRIPTORS}}" PARENT_SCOPE)
+  endif()
+endfunction()
+
+# Helper function.
+# This function is a modified version of the function protobuf_generate() copied from https://github.com/Kitware/CMake/blob/master/Modules/FindProtobuf.cmake.
+function(protobuf_generate_grpc)
+  set(_options APPEND_PATH DESCRIPTORS)
+  set(_singleargs LANGUAGE OUT_VAR EXPORT_MACRO PROTOC_OUT_DIR)
+  if(COMMAND target_sources)
+    list(APPEND _singleargs TARGET)
+  endif()
+  set(_multiargs PROTOS IMPORT_DIRS GENERATE_EXTENSIONS)
+
+  cmake_parse_arguments(protobuf_generate_grpc "${_options}" "${_singleargs}" "${_multiargs}" "${ARGN}")
+
+  if(NOT protobuf_generate_grpc_PROTOS AND NOT protobuf_generate_grpc_TARGET)
+    message(SEND_ERROR "Error: protobuf_generate_grpc called without any targets or source files")
+    return()
+  endif()
+
+  if(NOT protobuf_generate_grpc_OUT_VAR AND NOT protobuf_generate_grpc_TARGET)
+    message(SEND_ERROR "Error: protobuf_generate_grpc called without a target or output variable")
+    return()
+  endif()
+
+  if(NOT protobuf_generate_grpc_LANGUAGE)
+    set(protobuf_generate_grpc_LANGUAGE cpp)
+  endif()
+  string(TOLOWER ${protobuf_generate_grpc_LANGUAGE} protobuf_generate_grpc_LANGUAGE)
+
+  if(NOT protobuf_generate_grpc_PROTOC_OUT_DIR)
+    set(protobuf_generate_grpc_PROTOC_OUT_DIR ${CMAKE_CURRENT_BINARY_DIR})
+  endif()
+
+  if(protobuf_generate_grpc_EXPORT_MACRO AND protobuf_generate_grpc_LANGUAGE STREQUAL cpp)
+    set(_dll_export_decl "dllexport_decl=${protobuf_generate_grpc_EXPORT_MACRO}:")
+  endif()
+
+  if(NOT protobuf_generate_grpc_GENERATE_EXTENSIONS)
+    if(protobuf_generate_grpc_LANGUAGE STREQUAL cpp)
+      set(protobuf_generate_grpc_GENERATE_EXTENSIONS .pb.h .pb.cc .grpc.pb.h .grpc.pb.cc)
+    elseif(protobuf_generate_grpc_LANGUAGE STREQUAL python)
+      set(protobuf_generate_grpc_GENERATE_EXTENSIONS _pb2.py)
+    else()
+      message(SEND_ERROR "Error: protobuf_generate_grpc given unknown Language ${LANGUAGE}, please provide a value for GENERATE_EXTENSIONS")
+      return()
+    endif()
+  endif()
+
+  if(NOT protobuf_generate_grpc_PLUGIN)
+    if(protobuf_generate_grpc_LANGUAGE STREQUAL cpp)
+      set(protobuf_generate_grpc_PLUGIN "grpc_cpp_plugin")
+    elseif(protobuf_generate_grpc_LANGUAGE STREQUAL python)
+      set(protobuf_generate_grpc_PLUGIN "grpc_python_plugin")
+    else()
+      message(SEND_ERROR "Error: protobuf_generate_grpc given unknown Language ${LANGUAGE}, please provide a value for PLUGIN")
+      return()
+    endif()
+  endif()
+
+  if(protobuf_generate_grpc_TARGET)
+    get_target_property(_source_list ${protobuf_generate_grpc_TARGET} SOURCES)
+    foreach(_file ${_source_list})
+      if(_file MATCHES "proto$")
+        list(APPEND protobuf_generate_grpc_PROTOS ${_file})
+      endif()
+    endforeach()
+  endif()
+
+  if(NOT protobuf_generate_grpc_PROTOS)
+    message(SEND_ERROR "Error: protobuf_generate_grpc could not find any .proto files")
+    return()
+  endif()
+
+  if(protobuf_generate_grpc_APPEND_PATH)
+    # Create an include path for each file specified
+    foreach(_file ${protobuf_generate_grpc_PROTOS})
+      get_filename_component(_abs_file ${_file} ABSOLUTE)
+      get_filename_component(_abs_path ${_abs_file} PATH)
+      list(FIND _protobuf_include_path ${_abs_path} _contains_already)
+      if(${_contains_already} EQUAL -1)
+          list(APPEND _protobuf_include_path -I ${_abs_path})
+      endif()
+    endforeach()
+  else()
+    set(_protobuf_include_path -I ${CMAKE_CURRENT_SOURCE_DIR})
+  endif()
+
+  foreach(DIR ${protobuf_generate_grpc_IMPORT_DIRS})
+    get_filename_component(ABS_PATH ${DIR} ABSOLUTE)
+    list(FIND _protobuf_include_path ${ABS_PATH} _contains_already)
+    if(${_contains_already} EQUAL -1)
+        list(APPEND _protobuf_include_path -I ${ABS_PATH})
+    endif()
+  endforeach()
+
+  set(_generated_srcs_all)
+  foreach(_proto ${protobuf_generate_grpc_PROTOS})
+    get_filename_component(_abs_file ${_proto} ABSOLUTE)
+    get_filename_component(_abs_dir ${_abs_file} DIRECTORY)
+    get_filename_component(_basename ${_proto} NAME_WE)
+    file(RELATIVE_PATH _rel_dir ${CMAKE_CURRENT_SOURCE_DIR} ${_abs_dir})
+
+    set(_possible_rel_dir)
+    if(NOT protobuf_generate_grpc_APPEND_PATH)
+        set(_possible_rel_dir ${_rel_dir}/)
+    endif()
+
+    set(_generated_srcs)
+    foreach(_ext ${protobuf_generate_grpc_GENERATE_EXTENSIONS})
+      list(APPEND _generated_srcs "${protobuf_generate_grpc_PROTOC_OUT_DIR}/${_possible_rel_dir}${_basename}${_ext}")
+    endforeach()
+
+    if(protobuf_generate_grpc_DESCRIPTORS AND protobuf_generate_grpc_LANGUAGE STREQUAL cpp)
+      set(_descriptor_file "${CMAKE_CURRENT_BINARY_DIR}/${_basename}.desc")
+      set(_dll_desc_out "--descriptor_set_out=${_descriptor_file}")
+      list(APPEND _generated_srcs ${_descriptor_file})
+    endif()
+    list(APPEND _generated_srcs_all ${_generated_srcs})
+
+    add_custom_command(
+      OUTPUT ${_generated_srcs}
+      COMMAND protobuf::protoc
+      ARGS --${protobuf_generate_grpc_LANGUAGE}_out ${_dll_export_decl}${protobuf_generate_grpc_PROTOC_OUT_DIR}
+           --grpc_out ${_dll_export_decl}${protobuf_generate_grpc_PROTOC_OUT_DIR}
+           --plugin=protoc-gen-grpc=$<TARGET_FILE:${protobuf_generate_grpc_PLUGIN}>
+           ${_dll_desc_out} ${_protobuf_include_path} ${_abs_file}
+      DEPENDS ${_abs_file} protobuf::protoc ${protobuf_generate_grpc_PLUGIN}
+      COMMENT "Running ${protobuf_generate_grpc_LANGUAGE} protocol buffer compiler on ${_proto}"
+      VERBATIM)
+  endforeach()
+
+  set_source_files_properties(${_generated_srcs_all} PROPERTIES GENERATED TRUE)
+  if(protobuf_generate_grpc_OUT_VAR)
+    set(${protobuf_generate_grpc_OUT_VAR} ${_generated_srcs_all} PARENT_SCOPE)
+  endif()
+  if(protobuf_generate_grpc_TARGET)
+    target_sources(${protobuf_generate_grpc_TARGET} PRIVATE ${_generated_srcs_all})
+  endif()
+endfunction()
--- a/contrib/libhdfs3
+++ b/contrib/libhdfs3
@ -1 +1 @@
-Subproject commit 1b666578c85094306b061352078022f6350bfab8
+Subproject commit 24b058c356794ef6cc2d31323dc9adf0386652ff
--- a/contrib/mariadb-connector-c
+++ b/contrib/mariadb-connector-c
@ -1 +1 @@
-Subproject commit 3f512fedf0ba0f769a1b4852b4bac542d92c5b20
+Subproject commit f5638e954a79f50bac7c7a5deaa5a241e0ce8b5f
--- a/contrib/poco
+++ b/contrib/poco
@ -1 +1 @@
-Subproject commit 297fc905e166392156f83b96aaa5f44e8a6a35c4
+Subproject commit 757d947235b307675cff964f29b19d388140a9eb
--- a/contrib/protobuf-cmake/protobuf_generate.cmake
+++ b/contrib/protobuf-cmake/protobuf_generate.cmake
@ -0,0 +1,198 @@
+# The code in this file was copied from https://github.com/Kitware/CMake/blob/master/Modules/FindProtobuf.cmake
+
+#[[
+Add custom commands to process ``.proto`` files to C++::
+
+protobuf_generate_cpp (<SRCS> <HDRS>
+    [DESCRIPTORS <DESC>] [EXPORT_MACRO <MACRO>] [<ARGN>...])
+
+``SRCS``
+  Variable to define with autogenerated source files
+``HDRS``
+  Variable to define with autogenerated header files
+``DESCRIPTORS``
+  Variable to define with autogenerated descriptor files, if requested.
+``EXPORT_MACRO``
+  is a macro which should expand to ``__declspec(dllexport)`` or
+  ``__declspec(dllimport)`` depending on what is being compiled.
+``ARGN``
+  ``.proto`` files
+#]]
+
+function(PROTOBUF_GENERATE_CPP SRCS HDRS)
+  cmake_parse_arguments(protobuf_generate_cpp "" "EXPORT_MACRO;DESCRIPTORS" "" ${ARGN})
+
+  set(_proto_files "${protobuf_generate_cpp_UNPARSED_ARGUMENTS}")
+  if(NOT _proto_files)
+    message(SEND_ERROR "Error: PROTOBUF_GENERATE_CPP() called without any proto files")
+    return()
+  endif()
+
+  if(PROTOBUF_GENERATE_CPP_APPEND_PATH)
+    set(_append_arg APPEND_PATH)
+  endif()
+
+  if(protobuf_generate_cpp_DESCRIPTORS)
+    set(_descriptors DESCRIPTORS)
+  endif()
+
+  if(DEFINED PROTOBUF_IMPORT_DIRS AND NOT DEFINED Protobuf_IMPORT_DIRS)
+    set(Protobuf_IMPORT_DIRS "${PROTOBUF_IMPORT_DIRS}")
+  endif()
+
+  if(DEFINED Protobuf_IMPORT_DIRS)
+    set(_import_arg IMPORT_DIRS ${Protobuf_IMPORT_DIRS})
+  endif()
+
+  set(_outvar)
+  protobuf_generate(${_append_arg} ${_descriptors} LANGUAGE cpp EXPORT_MACRO ${protobuf_generate_cpp_EXPORT_MACRO} OUT_VAR _outvar ${_import_arg} PROTOS ${_proto_files})
+
+  set(${SRCS})
+  set(${HDRS})
+  if(protobuf_generate_cpp_DESCRIPTORS)
+    set(${protobuf_generate_cpp_DESCRIPTORS})
+  endif()
+
+  foreach(_file ${_outvar})
+    if(_file MATCHES "cc$")
+      list(APPEND ${SRCS} ${_file})
+    elseif(_file MATCHES "desc$")
+      list(APPEND ${protobuf_generate_cpp_DESCRIPTORS} ${_file})
+    else()
+      list(APPEND ${HDRS} ${_file})
+    endif()
+  endforeach()
+  set(${SRCS} ${${SRCS}} PARENT_SCOPE)
+  set(${HDRS} ${${HDRS}} PARENT_SCOPE)
+  if(protobuf_generate_cpp_DESCRIPTORS)
+    set(${protobuf_generate_cpp_DESCRIPTORS} "${${protobuf_generate_cpp_DESCRIPTORS}}" PARENT_SCOPE)
+  endif()
+endfunction()
+
+# By default have PROTOBUF_GENERATE_CPP macro pass -I to protoc
+# for each directory where a proto file is referenced.
+if(NOT DEFINED PROTOBUF_GENERATE_CPP_APPEND_PATH)
+  set(PROTOBUF_GENERATE_CPP_APPEND_PATH TRUE)
+endif()
+
+function(protobuf_generate)
+  set(_options APPEND_PATH DESCRIPTORS)
+  set(_singleargs LANGUAGE OUT_VAR EXPORT_MACRO PROTOC_OUT_DIR)
+  if(COMMAND target_sources)
+    list(APPEND _singleargs TARGET)
+  endif()
+  set(_multiargs PROTOS IMPORT_DIRS GENERATE_EXTENSIONS)
+
+  cmake_parse_arguments(protobuf_generate "${_options}" "${_singleargs}" "${_multiargs}" "${ARGN}")
+
+  if(NOT protobuf_generate_PROTOS AND NOT protobuf_generate_TARGET)
+    message(SEND_ERROR "Error: protobuf_generate called without any targets or source files")
+    return()
+  endif()
+
+  if(NOT protobuf_generate_OUT_VAR AND NOT protobuf_generate_TARGET)
+    message(SEND_ERROR "Error: protobuf_generate called without a target or output variable")
+    return()
+  endif()
+
+  if(NOT protobuf_generate_LANGUAGE)
+    set(protobuf_generate_LANGUAGE cpp)
+  endif()
+  string(TOLOWER ${protobuf_generate_LANGUAGE} protobuf_generate_LANGUAGE)
+
+  if(NOT protobuf_generate_PROTOC_OUT_DIR)
+    set(protobuf_generate_PROTOC_OUT_DIR ${CMAKE_CURRENT_BINARY_DIR})
+  endif()
+
+  if(protobuf_generate_EXPORT_MACRO AND protobuf_generate_LANGUAGE STREQUAL cpp)
+    set(_dll_export_decl "dllexport_decl=${protobuf_generate_EXPORT_MACRO}:")
+  endif()
+
+  if(NOT protobuf_generate_GENERATE_EXTENSIONS)
+    if(protobuf_generate_LANGUAGE STREQUAL cpp)
+      set(protobuf_generate_GENERATE_EXTENSIONS .pb.h .pb.cc)
+    elseif(protobuf_generate_LANGUAGE STREQUAL python)
+      set(protobuf_generate_GENERATE_EXTENSIONS _pb2.py)
+    else()
+      message(SEND_ERROR "Error: protobuf_generate given unknown Language ${LANGUAGE}, please provide a value for GENERATE_EXTENSIONS")
+      return()
+    endif()
+  endif()
+
+  if(protobuf_generate_TARGET)
+    get_target_property(_source_list ${protobuf_generate_TARGET} SOURCES)
+    foreach(_file ${_source_list})
+      if(_file MATCHES "proto$")
+        list(APPEND protobuf_generate_PROTOS ${_file})
+      endif()
+    endforeach()
+  endif()
+
+  if(NOT protobuf_generate_PROTOS)
+    message(SEND_ERROR "Error: protobuf_generate could not find any .proto files")
+    return()
+  endif()
+
+  if(protobuf_generate_APPEND_PATH)
+    # Create an include path for each file specified
+    foreach(_file ${protobuf_generate_PROTOS})
+      get_filename_component(_abs_file ${_file} ABSOLUTE)
+      get_filename_component(_abs_path ${_abs_file} PATH)
+      list(FIND _protobuf_include_path ${_abs_path} _contains_already)
+      if(${_contains_already} EQUAL -1)
+          list(APPEND _protobuf_include_path -I ${_abs_path})
+      endif()
+    endforeach()
+  else()
+    set(_protobuf_include_path -I ${CMAKE_CURRENT_SOURCE_DIR})
+  endif()
+
+  foreach(DIR ${protobuf_generate_IMPORT_DIRS})
+    get_filename_component(ABS_PATH ${DIR} ABSOLUTE)
+    list(FIND _protobuf_include_path ${ABS_PATH} _contains_already)
+    if(${_contains_already} EQUAL -1)
+        list(APPEND _protobuf_include_path -I ${ABS_PATH})
+    endif()
+  endforeach()
+
+  set(_generated_srcs_all)
+  foreach(_proto ${protobuf_generate_PROTOS})
+    get_filename_component(_abs_file ${_proto} ABSOLUTE)
+    get_filename_component(_abs_dir ${_abs_file} DIRECTORY)
+    get_filename_component(_basename ${_proto} NAME_WE)
+    file(RELATIVE_PATH _rel_dir ${CMAKE_CURRENT_SOURCE_DIR} ${_abs_dir})
+
+    set(_possible_rel_dir)
+    if (NOT protobuf_generate_APPEND_PATH)
+        set(_possible_rel_dir ${_rel_dir}/)
+    endif()
+
+    set(_generated_srcs)
+    foreach(_ext ${protobuf_generate_GENERATE_EXTENSIONS})
+      list(APPEND _generated_srcs "${protobuf_generate_PROTOC_OUT_DIR}/${_possible_rel_dir}${_basename}${_ext}")
+    endforeach()
+
+    if(protobuf_generate_DESCRIPTORS AND protobuf_generate_LANGUAGE STREQUAL cpp)
+      set(_descriptor_file "${CMAKE_CURRENT_BINARY_DIR}/${_basename}.desc")
+      set(_dll_desc_out "--descriptor_set_out=${_descriptor_file}")
+      list(APPEND _generated_srcs ${_descriptor_file})
+    endif()
+    list(APPEND _generated_srcs_all ${_generated_srcs})
+
+    add_custom_command(
+      OUTPUT ${_generated_srcs}
+      COMMAND  protobuf::protoc
+      ARGS --${protobuf_generate_LANGUAGE}_out ${_dll_export_decl}${protobuf_generate_PROTOC_OUT_DIR} ${_dll_desc_out} ${_protobuf_include_path} ${_abs_file}
+      DEPENDS ${_abs_file} protobuf::protoc
+      COMMENT "Running ${protobuf_generate_LANGUAGE} protocol buffer compiler on ${_proto}"
+      VERBATIM )
+  endforeach()
+
+  set_source_files_properties(${_generated_srcs_all} PROPERTIES GENERATED TRUE)
+  if(protobuf_generate_OUT_VAR)
+    set(${protobuf_generate_OUT_VAR} ${_generated_srcs_all} PARENT_SCOPE)
+  endif()
+  if(protobuf_generate_TARGET)
+    target_sources(${protobuf_generate_TARGET} PRIVATE ${_generated_srcs_all})
+  endif()
+endfunction()
--- a/debian/control
+++ b/debian/control
@ -62,5 +62,5 @@ Description: debugging symbols for clickhouse-common-static
 Package: clickhouse-test
 Priority: optional
 Architecture: all
-Depends: ${shlibs:Depends}, ${misc:Depends}, clickhouse-client, bash, expect, python, python-lxml, python-termcolor, python-requests, curl, perl, sudo, openssl, netcat-openbsd, telnet, brotli, bsdutils
+Depends: ${shlibs:Depends}, ${misc:Depends}, clickhouse-client, bash, expect, python3, python3-lxml, python3-termcolor, python3-requests, curl, perl, sudo, openssl, netcat-openbsd, telnet, brotli, bsdutils
 Description: ClickHouse tests
--- a/docker/builder/Dockerfile
+++ b/docker/builder/Dockerfile
@ -25,10 +25,10 @@ RUN apt-get update \
        ninja-build \
        perl \
        pkg-config \
-        python \
-        python-lxml \
-        python-requests \
-        python-termcolor \
+        python3 \
+        python3-lxml \
+        python3-requests \
+        python3-termcolor \
        tzdata \
        llvm-${LLVM_VERSION} \
        clang-${LLVM_VERSION} \
--- a/docker/builder/build.sh
+++ b/docker/builder/build.sh
@ -1,9 +1,10 @@
 #!/usr/bin/env bash
+set -e

 #ccache -s # uncomment to display CCache statistics
 mkdir -p /server/build_docker
 cd /server/build_docker
-cmake -G Ninja /server -DCMAKE_C_COMPILER=`which gcc-9` -DCMAKE_CXX_COMPILER=`which g++-9`
+cmake -G Ninja /server "-DCMAKE_C_COMPILER=$(command -v gcc-9)" "-DCMAKE_CXX_COMPILER=$(command -v g++-9)"

 # Set the number of build jobs to the half of number of virtual CPU cores (rounded up).
 # By default, ninja use all virtual CPU cores, that leads to very high memory consumption without much improvement in build time.
--- a/docker/images.json
+++ b/docker/images.json
@ -9,7 +9,8 @@
        "name": "yandex/clickhouse-binary-builder",
        "dependent": [
            "docker/test/split_build_smoke_test",
-            "docker/test/pvs"
+            "docker/test/pvs",
+            "docker/test/codebrowser"
        ]
    },
    "docker/packager/unbundled": {
@ -133,6 +134,10 @@
        "name": "yandex/clickhouse-postgresql-java-client",
        "dependent": []
    },
+    "docker/test/integration/kerberos_kdc": {
+        "name": "yandex/clickhouse-kerberos-kdc",
+        "dependent": []
+    },
    "docker/test/base": {
         "name": "yandex/clickhouse-test-base",
         "dependent": [
--- a/docker/packager/binary/Dockerfile
+++ b/docker/packager/binary/Dockerfile
@ -1,7 +1,7 @@
 #  docker build -t yandex/clickhouse-binary-builder .
 FROM ubuntu:20.04

-ENV DEBIAN_FRONTEND=noninteractive LLVM_VERSION=10
+ENV DEBIAN_FRONTEND=noninteractive LLVM_VERSION=11

 RUN apt-get update \
    && apt-get install ca-certificates lsb-release wget gnupg apt-transport-https \
@ -11,7 +11,7 @@ RUN apt-get update \
    && echo "${LLVM_PUBKEY_HASH} /tmp/llvm-snapshot.gpg.key" | sha384sum -c \
    && apt-key add /tmp/llvm-snapshot.gpg.key \
    && export CODENAME="$(lsb_release --codename --short | tr 'A-Z' 'a-z')" \
-    && echo "deb [trusted=yes] http://apt.llvm.org/${CODENAME}/ llvm-toolchain-${CODENAME}-11 main" >> \
+    && echo "deb [trusted=yes] http://apt.llvm.org/${CODENAME}/ llvm-toolchain-${CODENAME}-${LLVM_VERSION} main" >> \
        /etc/apt/sources.list

 # initial packages
@ -32,10 +32,11 @@ RUN apt-get update \
        curl \
        gcc-9 \
        g++-9 \
-        llvm-${LLVM_VERSION} \
-        clang-${LLVM_VERSION} \
-        lld-${LLVM_VERSION} \
-        clang-tidy-${LLVM_VERSION} \
+        clang-10 \
+        clang-tidy-10 \
+        lld-10 \
+        llvm-10 \
+        llvm-10-dev \
        clang-11 \
        clang-tidy-11 \
        lld-11 \
--- a/docker/packager/binary/build.sh
+++ b/docker/packager/binary/build.sh
@ -17,7 +17,10 @@ ccache --show-stats ||:
 ccache --zero-stats ||:
 ln -s /usr/lib/x86_64-linux-gnu/libOpenCL.so.1.0.0 /usr/lib/libOpenCL.so ||:
 rm -f CMakeCache.txt
-cmake --debug-trycompile --verbose=1 -DCMAKE_VERBOSE_MAKEFILE=1 -LA -DCMAKE_BUILD_TYPE=$BUILD_TYPE -DSANITIZE=$SANITIZER -DENABLE_CHECK_HEAVY_BUILDS=1 $CMAKE_FLAGS ..
+# Read cmake arguments into array (possibly empty)
+read -ra CMAKE_FLAGS <<< "${CMAKE_FLAGS:-}"
+cmake --debug-trycompile --verbose=1 -DCMAKE_VERBOSE_MAKEFILE=1 -LA "-DCMAKE_BUILD_TYPE=$BUILD_TYPE" "-DSANITIZE=$SANITIZER" -DENABLE_CHECK_HEAVY_BUILDS=1 "${CMAKE_FLAGS[@]}" ..
+# shellcheck disable=SC2086 # No quotes because I want it to expand to nothing if empty.
 ninja $NINJA_FLAGS clickhouse-bundle
 mv ./programs/clickhouse* /output
 mv ./src/unit_tests_dbms /output ||: # may not exist for some binary builds
--- a/docker/packager/deb/Dockerfile
+++ b/docker/packager/deb/Dockerfile
@ -1,7 +1,7 @@
 # docker build -t yandex/clickhouse-deb-builder .
 FROM ubuntu:20.04

-ENV DEBIAN_FRONTEND=noninteractive LLVM_VERSION=10
+ENV DEBIAN_FRONTEND=noninteractive LLVM_VERSION=11

 RUN apt-get update \
    && apt-get install ca-certificates lsb-release wget gnupg apt-transport-https \
@ -11,7 +11,7 @@ RUN apt-get update \
    && echo "${LLVM_PUBKEY_HASH} /tmp/llvm-snapshot.gpg.key" | sha384sum -c \
    && apt-key add /tmp/llvm-snapshot.gpg.key \
    && export CODENAME="$(lsb_release --codename --short | tr 'A-Z' 'a-z')" \
-    && echo "deb [trusted=yes] http://apt.llvm.org/${CODENAME}/ llvm-toolchain-${CODENAME}-11 main" >> \
+    && echo "deb [trusted=yes] http://apt.llvm.org/${CODENAME}/ llvm-toolchain-${CODENAME}-${LLVM_VERSION} main" >> \
        /etc/apt/sources.list

 # initial packages
@ -49,15 +49,11 @@ RUN apt-get update \
        lld-11 \
        llvm-11 \
        llvm-11-dev \
-        clang-${LLVM_VERSION} \
-        clang-tidy-${LLVM_VERSION} \
-        lld-${LLVM_VERSION} \
-        llvm-${LLVM_VERSION} \
-        llvm-${LLVM_VERSION}-dev \
-        llvm-9-dev \
-        lld-9 \
-        clang-9 \
-        clang-tidy-9 \
+        clang-10 \
+        clang-tidy-10 \
+        lld-10 \
+        llvm-10 \
+        llvm-10-dev \
        ninja-build \
        perl \
        pkg-config \
--- a/docker/packager/deb/build.sh
+++ b/docker/packager/deb/build.sh
@ -4,16 +4,17 @@ set -x -e

 ccache --show-stats ||:
 ccache --zero-stats ||:
-build/release --no-pbuilder $ALIEN_PKGS | ts '%Y-%m-%d %H:%M:%S'
+read -ra ALIEN_PKGS <<< "${ALIEN_PKGS:-}"
+build/release --no-pbuilder "${ALIEN_PKGS[@]}" | ts '%Y-%m-%d %H:%M:%S'
 mv /*.deb /output
-mv *.changes /output
-mv *.buildinfo /output
+mv -- *.changes /output
+mv -- *.buildinfo /output
 mv /*.rpm /output ||: # if exists
 mv /*.tgz /output ||: # if exists

 if [ -n "$BINARY_OUTPUT" ] && { [ "$BINARY_OUTPUT" = "programs" ] || [ "$BINARY_OUTPUT" = "tests" ] ;}
 then
-  echo Place $BINARY_OUTPUT to output
+  echo "Place $BINARY_OUTPUT to output"
  mkdir /output/binary ||: # if exists
  mv /build/obj-*/programs/clickhouse* /output/binary
  if [ "$BINARY_OUTPUT" = "tests" ]
--- a/docker/packager/packager
+++ b/docker/packager/packager
@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 #-*- coding: utf-8 -*-
 import subprocess
 import os
--- a/docker/packager/unbundled/Dockerfile
+++ b/docker/packager/unbundled/Dockerfile
@ -51,6 +51,7 @@ RUN apt-get update \
        protobuf-compiler \
        libprotoc-dev \
        libgrpc++-dev \
+        protobuf-compiler-grpc \
        rapidjson-dev \
        libsnappy-dev \
        libparquet-dev \
--- a/docker/packager/unbundled/build.sh
+++ b/docker/packager/unbundled/build.sh
@ -4,10 +4,11 @@ set -x -e

 ccache --show-stats ||:
 ccache --zero-stats ||:
-build/release --no-pbuilder $ALIEN_PKGS | ts '%Y-%m-%d %H:%M:%S'
+read -ra ALIEN_PKGS <<< "${ALIEN_PKGS:-}"
+build/release --no-pbuilder "${ALIEN_PKGS[@]}" | ts '%Y-%m-%d %H:%M:%S'
 mv /*.deb /output
-mv *.changes /output
-mv *.buildinfo /output
+mv -- *.changes /output
+mv -- *.buildinfo /output
 mv /*.rpm /output ||: # if exists
 mv /*.tgz /output ||: # if exists

--- a/docker/test/base/Dockerfile
+++ b/docker/test/base/Dockerfile
@ -48,10 +48,15 @@ RUN apt-get update \
        tzdata \
        --yes --no-install-recommends

-# Sanitizer options
+# Sanitizer options for services (clickhouse-server)
 RUN echo "TSAN_OPTIONS='verbosity=1000 halt_on_error=1 history_size=7'" >> /etc/environment; \
  echo "UBSAN_OPTIONS='print_stacktrace=1'" >> /etc/environment; \
  echo "MSAN_OPTIONS='abort_on_error=1'" >> /etc/environment; \
  ln -s /usr/lib/llvm-${LLVM_VERSION}/bin/llvm-symbolizer /usr/bin/llvm-symbolizer;
+# Sanitizer options for current shell (not current, but the one that will be spawned on "docker run")
+# (but w/o verbosity for TSAN, otherwise test.reference will not match)
+ENV TSAN_OPTIONS='halt_on_error=1 history_size=7'
+ENV UBSAN_OPTIONS='print_stacktrace=1'
+ENV MSAN_OPTIONS='abort_on_error=1'

 CMD sleep 1
--- a/docker/test/codebrowser/Dockerfile
+++ b/docker/test/codebrowser/Dockerfile
@ -1,33 +1,15 @@
 # docker build --network=host -t yandex/clickhouse-codebrowser .
 # docker run --volume=path_to_repo:/repo_folder --volume=path_to_result:/test_output yandex/clickhouse-codebrowser
-FROM ubuntu:18.04
+FROM yandex/clickhouse-binary-builder

-RUN apt-get --allow-unauthenticated update -y \
-    && env DEBIAN_FRONTEND=noninteractive \
-        apt-get --allow-unauthenticated install --yes --no-install-recommends \
-        bash \
-        sudo \
-        wget \
-        software-properties-common \
-        ca-certificates \
-        apt-transport-https \
-        build-essential \
-        gpg-agent \
-        git
-
-RUN wget -nv -O - https://apt.kitware.com/keys/kitware-archive-latest.asc | sudo apt-key add -
-RUN sudo apt-add-repository 'deb https://apt.kitware.com/ubuntu/ bionic main'
-RUN sudo echo "deb [trusted=yes] http://apt.llvm.org/bionic/ llvm-toolchain-bionic-8 main" >> /etc/apt/sources.list
-
-RUN sudo apt-get --yes --allow-unauthenticated update
-# To build woboq
-RUN sudo apt-get --yes --allow-unauthenticated install cmake clang-8 libllvm8 libclang-8-dev
+RUN apt-get update && apt-get --yes --allow-unauthenticated install clang-9 libllvm9 libclang-9-dev

 # repo versions doesn't work correctly with C++17
 # also we push reports to s3, so we add index.html to subfolder urls
 # https://github.com/ClickHouse-Extras/woboq_codebrowser/commit/37e15eaf377b920acb0b48dbe82471be9203f76b
 RUN git clone https://github.com/ClickHouse-Extras/woboq_codebrowser
-RUN cd woboq_codebrowser && cmake . -DCMAKE_BUILD_TYPE=Release && make -j
+
+RUN cd woboq_codebrowser && cmake . -DCMAKE_BUILD_TYPE=Release -DCMAKE_CXX_COMPILER=clang\+\+-9 -DCMAKE_C_COMPILER=clang-9 && make -j

 ENV CODEGEN=/woboq_codebrowser/generator/codebrowser_generator
 ENV CODEINDEX=/woboq_codebrowser/indexgenerator/codebrowser_indexgenerator
@ -40,7 +22,7 @@ ENV SHA=nosha
 ENV DATA="data"

 CMD mkdir -p $BUILD_DIRECTORY && cd $BUILD_DIRECTORY && \
-    cmake $SOURCE_DIRECTORY -DCMAKE_CXX_COMPILER=/usr/bin/clang\+\+-8 -DCMAKE_C_COMPILER=/usr/bin/clang-8 -DCMAKE_EXPORT_COMPILE_COMMANDS=ON && \
+    cmake $SOURCE_DIRECTORY -DCMAKE_CXX_COMPILER=/usr/bin/clang\+\+-11 -DCMAKE_C_COMPILER=/usr/bin/clang-11 -DCMAKE_EXPORT_COMPILE_COMMANDS=ON && \
    mkdir -p $HTML_RESULT_DIRECTORY && \
    $CODEGEN -b $BUILD_DIRECTORY -a -o $HTML_RESULT_DIRECTORY -p ClickHouse:$SOURCE_DIRECTORY:$SHA -d $DATA && \
    cp -r $STATIC_DATA $HTML_RESULT_DIRECTORY/ &&\
--- a/docker/test/fasttest/Dockerfile
+++ b/docker/test/fasttest/Dockerfile
@ -11,7 +11,7 @@ RUN apt-get update \
    && echo "${LLVM_PUBKEY_HASH} /tmp/llvm-snapshot.gpg.key" | sha384sum -c \
    && apt-key add /tmp/llvm-snapshot.gpg.key \
    && export CODENAME="$(lsb_release --codename --short | tr 'A-Z' 'a-z')" \
-    && echo "deb [trusted=yes] http://apt.llvm.org/${CODENAME}/ llvm-toolchain-${CODENAME}-${LLVM_VERSION} main" >> \
+    && echo "deb [trusted=yes] https://apt.llvm.org/${CODENAME}/ llvm-toolchain-${CODENAME}-${LLVM_VERSION} main" >> \
        /etc/apt/sources.list

 # initial packages
@ -52,10 +52,10 @@ RUN apt-get update \
        moreutils \
        ninja-build \
        psmisc \
-        python \
-        python-lxml \
-        python-requests \
-        python-termcolor \
+        python3 \
+        python3-lxml \
+        python3-requests \
+        python3-termcolor \
        qemu-user-static \
        rename \
        software-properties-common \
--- a/docker/test/fasttest/run.sh
+++ b/docker/test/fasttest/run.sh
@ -15,29 +15,59 @@ stage=${stage:-}
 # empty parameter.
 read -ra FASTTEST_CMAKE_FLAGS <<< "${FASTTEST_CMAKE_FLAGS:-}"

+FASTTEST_WORKSPACE=$(readlink -f "${FASTTEST_WORKSPACE:-.}")
+FASTTEST_SOURCE=$(readlink -f "${FASTTEST_SOURCE:-$FASTTEST_WORKSPACE/ch}")
+FASTTEST_BUILD=$(readlink -f "${FASTTEST_BUILD:-${BUILD:-$FASTTEST_WORKSPACE/build}}")
+FASTTEST_DATA=$(readlink -f "${FASTTEST_DATA:-$FASTTEST_WORKSPACE/db-fasttest}")
+FASTTEST_OUTPUT=$(readlink -f "${FASTTEST_OUTPUT:-$FASTTEST_WORKSPACE}")

-function kill_clickhouse
+# Export these variables, so that all subsequent invocations of the script
+# use them, and not try to guess them anew, which leads to weird effects.
+export FASTTEST_WORKSPACE
+export FASTTEST_SOURCE
+export FASTTEST_BUILD
+export FASTTEST_DATA
+export FASTTEST_OUT
+
+server_pid=none
+
+function stop_server
 {
    for _ in {1..60}
    do
-        if ! pkill -f clickhouse-server ; then break ; fi
+        if ! pkill -f "clickhouse-server" && ! kill -- "$server_pid" ; then break ; fi
        sleep 1
    done

-    if pgrep -f clickhouse-server
+    if kill -0 -- "$server_pid"
    then
        pstree -apgT
        jobs
-        echo "Failed to kill the ClickHouse server $(pgrep -f clickhouse-server)"
+        echo "Failed to kill the ClickHouse server pid '$server_pid'"
        return 1
    fi
+
+    server_pid=none
 }

-function wait_for_server_start
+function start_server
 {
+    set -m # Spawn server in its own process groups
+    clickhouse-server --config-file="$FASTTEST_DATA/config.xml" -- --path "$FASTTEST_DATA" --user_files_path "$FASTTEST_DATA/user_files" &>> "$FASTTEST_OUTPUT/server.log" &
+    server_pid=$!
+    set +m
+
+    if [ "$server_pid" == "0" ]
+    then
+        echo "Failed to start ClickHouse server"
+        # Avoid zero PID because `kill` treats it as our process group PID.
+        server_pid="none"
+        return 1
+    fi
+
    for _ in {1..60}
    do
-        if clickhouse-client --query "select 1" || ! pgrep -f clickhouse-server
+        if clickhouse-client --query "select 1" || ! kill -0 -- "$server_pid"
        then
            break
        fi
@ -47,20 +77,26 @@ function wait_for_server_start
    if ! clickhouse-client --query "select 1"
    then
        echo "Failed to wait until ClickHouse server starts."
+        server_pid="none"
        return 1
    fi

-    echo "ClickHouse server pid '$(pgrep -f clickhouse-server)' started and responded"
+    if ! kill -0 -- "$server_pid"
+    then
+        echo "Wrong clickhouse server started: PID '$server_pid' we started is not running, but '$(pgrep -f clickhouse-server)' is running"
+        server_pid="none"
+        return 1
+    fi
+
+    echo "ClickHouse server pid '$server_pid' started and responded"
 }

 function clone_root
 {
-git clone https://github.com/ClickHouse/ClickHouse.git | ts '%Y-%m-%d %H:%M:%S' | tee /test_output/clone_log.txt
-cd ClickHouse
-CLICKHOUSE_DIR=$(pwd)
-export CLICKHOUSE_DIR
-
+git clone https://github.com/ClickHouse/ClickHouse.git -- "$FASTTEST_SOURCE" | ts '%Y-%m-%d %H:%M:%S' | tee "$FASTTEST_OUTPUT/clone_log.txt"

+(
+cd "$FASTTEST_SOURCE"
 if [ "$PULL_REQUEST_NUMBER" != "0" ]; then
    if git fetch origin "+refs/pull/$PULL_REQUEST_NUMBER/merge"; then
        git checkout FETCH_HEAD
@ -71,22 +107,36 @@ if [ "$PULL_REQUEST_NUMBER" != "0" ]; then
        echo 'Checked out to commit'
    fi
 else
-    if [ "$COMMIT_SHA" != "" ]; then
+    if [ -v COMMIT_SHA ]; then
        git checkout "$COMMIT_SHA"
    fi
 fi
+)
 }

-function run
+function clone_submodules
 {
+(
+cd "$FASTTEST_SOURCE"
+
 SUBMODULES_TO_UPDATE=(contrib/boost contrib/zlib-ng contrib/libxml2 contrib/poco contrib/libunwind contrib/ryu contrib/fmtlib contrib/base64 contrib/cctz contrib/libcpuid contrib/double-conversion contrib/libcxx contrib/libcxxabi contrib/libc-headers contrib/lz4 contrib/zstd contrib/fastops contrib/rapidjson contrib/re2 contrib/sparsehash-c11)

-git submodule update --init --recursive "${SUBMODULES_TO_UPDATE[@]}" | ts '%Y-%m-%d %H:%M:%S' | tee /test_output/submodule_log.txt
+git submodule sync
+git submodule update --init --recursive "${SUBMODULES_TO_UPDATE[@]}"
+git submodule foreach git reset --hard
+git submodule foreach git checkout @ -f
+git submodule foreach git clean -xfd
+)
+}

-CMAKE_LIBS_CONFIG=(-DENABLE_LIBRARIES=0 -DENABLE_TESTS=0 -DENABLE_UTILS=0 -DENABLE_EMBEDDED_COMPILER=0 -DENABLE_THINLTO=0 -DUSE_UNWIND=1)
+function run_cmake
+{
+CMAKE_LIBS_CONFIG=("-DENABLE_LIBRARIES=0" "-DENABLE_TESTS=0" "-DENABLE_UTILS=0" "-DENABLE_EMBEDDED_COMPILER=0" "-DENABLE_THINLTO=0" "-DUSE_UNWIND=1")

-export CCACHE_DIR=/ccache
-export CCACHE_BASEDIR=/ClickHouse
+# TODO remove this? we don't use ccache anyway. An option would be to download it
+# from S3 simultaneously with cloning.
+export CCACHE_DIR="$FASTTEST_WORKSPACE/ccache"
+export CCACHE_BASEDIR="$FASTTEST_SOURCE"
 export CCACHE_NOHASHDIR=true
 export CCACHE_COMPILERCHECK=content
 export CCACHE_MAXSIZE=15G
@ -94,34 +144,45 @@ export CCACHE_MAXSIZE=15G
 ccache --show-stats ||:
 ccache --zero-stats ||:

-mkdir build
-cd build
-cmake .. -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_CXX_COMPILER=clang++-10 -DCMAKE_C_COMPILER=clang-10 "${CMAKE_LIBS_CONFIG[@]}" "${FASTTEST_CMAKE_FLAGS[@]}" | ts '%Y-%m-%d %H:%M:%S' | tee /test_output/cmake_log.txt
-time ninja clickhouse-bundle | ts '%Y-%m-%d %H:%M:%S' | tee /test_output/build_log.txt
-ninja install | ts '%Y-%m-%d %H:%M:%S' | tee /test_output/install_log.txt
+mkdir "$FASTTEST_BUILD" ||:

+(
+cd "$FASTTEST_BUILD"
+cmake "$FASTTEST_SOURCE" -DCMAKE_CXX_COMPILER=clang++-10 -DCMAKE_C_COMPILER=clang-10 "${CMAKE_LIBS_CONFIG[@]}" "${FASTTEST_CMAKE_FLAGS[@]}" | ts '%Y-%m-%d %H:%M:%S' | tee "$FASTTEST_OUTPUT/cmake_log.txt"
+)
+}

+function build
+{
+(
+cd "$FASTTEST_BUILD"
+time ninja clickhouse-bundle | ts '%Y-%m-%d %H:%M:%S' | tee "$FASTTEST_OUTPUT/build_log.txt"
 ccache --show-stats ||:
+)
+}

-mkdir -p /etc/clickhouse-server
-mkdir -p /etc/clickhouse-client
-mkdir -p /etc/clickhouse-server/config.d
-mkdir -p /etc/clickhouse-server/users.d
-ln -s /test_output /var/log/clickhouse-server
-cp "$CLICKHOUSE_DIR/programs/server/config.xml" /etc/clickhouse-server/
-cp "$CLICKHOUSE_DIR/programs/server/users.xml" /etc/clickhouse-server/
+function configure
+{
+clickhouse-client --version
+clickhouse-test --help

-# install tests config
-$CLICKHOUSE_DIR/tests/config/install.sh
+mkdir -p "$FASTTEST_DATA"{,/client-config}
+cp -a "$FASTTEST_SOURCE/programs/server/"{config,users}.xml "$FASTTEST_DATA"
+cp -a "$FASTTEST_SOURCE/programs/server/"{config,users}.xml "$FASTTEST_DATA"
+"$FASTTEST_SOURCE/tests/config/install.sh" "$FASTTEST_DATA" "$FASTTEST_DATA/client-config"
 # doesn't support SSL
-rm -f /etc/clickhouse-server/config.d/secure_ports.xml
+rm -f "$FASTTEST_DATA/config.d/secure_ports.xml"
+}
+
+function run_tests
+{
+clickhouse-server --version
+clickhouse-test --help

 # Kill the server in case we are running locally and not in docker
-kill_clickhouse
+stop_server ||:

-clickhouse-server --config /etc/clickhouse-server/config.xml --daemon
-
-wait_for_server_start
+start_server

 TESTS_TO_SKIP=(
    parquet
@ -191,11 +252,10 @@ TESTS_TO_SKIP=(
    01460_DistributedFilesToInsert
 )

-time clickhouse-test -j 8 --no-long --testname --shard --zookeeper --skip "${TESTS_TO_SKIP[@]}" 2>&1 | ts '%Y-%m-%d %H:%M:%S' | tee /test_output/test_log.txt
-
+time clickhouse-test -j 8 --no-long --testname --shard --zookeeper --skip "${TESTS_TO_SKIP[@]}" 2>&1 | ts '%Y-%m-%d %H:%M:%S' | tee "$FASTTEST_OUTPUT/test_log.txt"

 # substr is to remove semicolon after test name
-readarray -t FAILED_TESTS < <(awk '/FAIL|TIMEOUT|ERROR/ { print substr($3, 1, length($3)-1) }' /test_output/test_log.txt | tee /test_output/failed-parallel-tests.txt)
+readarray -t FAILED_TESTS < <(awk '/FAIL|TIMEOUT|ERROR/ { print substr($3, 1, length($3)-1) }' "$FASTTEST_OUTPUT/test_log.txt" | tee "$FASTTEST_OUTPUT/failed-parallel-tests.txt")

 # We will rerun sequentially any tests that have failed during parallel run.
 # They might have failed because there was some interference from other tests
@ -206,19 +266,16 @@ readarray -t FAILED_TESTS < <(awk '/FAIL|TIMEOUT|ERROR/ { print substr($3, 1, le
 # explicit instead of guessing.
 if [[ -n "${FAILED_TESTS[*]}" ]]
 then
-    kill_clickhouse
+    stop_server ||:

    # Clean the data so that there is no interference from the previous test run.
-    rm -rf /var/lib/clickhouse ||:
-    mkdir /var/lib/clickhouse
+    rm -rf "$FASTTEST_DATA"/{meta,}data ||:

-    clickhouse-server --config /etc/clickhouse-server/config.xml --daemon
-
-    wait_for_server_start
+    start_server

    echo "Going to run again: ${FAILED_TESTS[*]}"

-    clickhouse-test --no-long --testname --shard --zookeeper "${FAILED_TESTS[@]}" 2>&1 | ts '%Y-%m-%d %H:%M:%S' | tee -a /test_output/test_log.txt
+    clickhouse-test --no-long --testname --shard --zookeeper "${FAILED_TESTS[@]}" 2>&1 | ts '%Y-%m-%d %H:%M:%S' | tee -a "$FASTTEST_OUTPUT/test_log.txt"
 else
    echo "No failed tests"
 fi
@ -228,20 +285,50 @@ case "$stage" in
 "")
    ls -la
    ;&
-
 "clone_root")
    clone_root

    # Pass control to the script from cloned sources, unless asked otherwise.
    if ! [ -v FASTTEST_LOCAL_SCRIPT ]
    then
-        stage=run "$CLICKHOUSE_DIR/docker/test/fasttest/run.sh"
+        # 'run' stage is deprecated, used for compatibility with old scripts.
+        # Replace with 'clone_submodules' after Nov 1, 2020.
+        # cd and CLICKHOUSE_DIR are also a setup for old scripts, remove as well.
+        # In modern script we undo it by changing back into workspace dir right
+        # away, see below. Remove that as well.
+        cd "$FASTTEST_SOURCE"
+        CLICKHOUSE_DIR=$(pwd)
+        export CLICKHOUSE_DIR
+        stage=run "$FASTTEST_SOURCE/docker/test/fasttest/run.sh"
        exit $?
    fi
    ;&
-
 "run")
-    run
+    # A deprecated stage that is called by old script and equivalent to everything
+    # after cloning root, starting with cloning submodules.
+    ;&
+"clone_submodules")
+    # Recover after being called from the old script that changes into source directory.
+    # See the compatibility hacks in `clone_root` stage above. Remove at the same time,
+    # after Nov 1, 2020.
+    cd "$FASTTEST_WORKSPACE"
+    clone_submodules | ts '%Y-%m-%d %H:%M:%S' | tee "$FASTTEST_OUTPUT/submodule_log.txt"
+    ;&
+"run_cmake")
+    run_cmake
+    ;&
+"build")
+    build
+    PATH="$FASTTEST_BUILD/programs:$FASTTEST_SOURCE/tests:$PATH"
+    export PATH
+    ;&
+"configure")
+    # The `install_log.txt` is also needed for compatibility with old CI task --
+    # if there is no log, it will decide that build failed.
+    configure | ts '%Y-%m-%d %H:%M:%S' | tee "$FASTTEST_OUTPUT/install_log.txt"
+    ;&
+"run_tests")
+    run_tests
    ;&
 esac

--- a/docker/test/fuzzer/run-fuzzer.sh
+++ b/docker/test/fuzzer/run-fuzzer.sh
@ -58,7 +58,7 @@ function watchdog

    echo "Fuzzing run has timed out"
    killall clickhouse-client ||:
-    for x in {1..10}
+    for _ in {1..10}
    do
        if ! pgrep -f clickhouse-client
        then
@ -81,6 +81,9 @@ function fuzz
    echo Server started

    fuzzer_exit_code=0
+    # SC2012: Use find instead of ls to better handle non-alphanumeric filenames.
+    # They are all alphanumeric.
+    # shellcheck disable=SC2012
    ./clickhouse-client --query-fuzzer-runs=1000 \
        < <(for f in $(ls ch/tests/queries/0_stateless/*.sql | sort -R); do cat "$f"; echo ';'; done) \
        > >(tail -10000 > fuzzer.log) \
--- a/docker/test/integration/base/Dockerfile
+++ b/docker/test/integration/base/Dockerfile
@ -4,7 +4,7 @@ FROM yandex/clickhouse-test-base
 RUN apt-get update \
    && env DEBIAN_FRONTEND=noninteractive apt-get -y install \
        tzdata \
-        python \
+        python3 \
        libreadline-dev \
        libicu-dev \
        bsdutils \
@ -16,7 +16,8 @@ RUN apt-get update \
        odbc-postgresql \
        sqlite3 \
        curl \
-        tar
+        tar \
+        krb5-user
 RUN rm -rf \
        /var/lib/apt/lists/* \
        /var/cache/debconf \
--- a/docker/test/integration/kerberos_kdc/Dockerfile
+++ b/docker/test/integration/kerberos_kdc/Dockerfile
@ -0,0 +1,15 @@
+# docker build -t yandex/clickhouse-kerberos-kdc .
+
+FROM centos:6.6
+# old OS to make is faster and smaller
+
+RUN yum install -y krb5-server krb5-libs krb5-auth-dialog krb5-workstation
+
+EXPOSE 88 749
+
+RUN touch /config.sh
+# should be overwritten e.g. via docker_compose volumes
+#   volumes: /some_path/my_kerberos_config.sh:/config.sh:ro
+
+
+ENTRYPOINT ["/bin/bash", "/config.sh"]
--- a/docker/test/integration/runner/Dockerfile
+++ b/docker/test/integration/runner/Dockerfile
@ -16,13 +16,13 @@ RUN apt-get update \
    iproute2 \
    module-init-tools \
    cgroupfs-mount \
-    python-pip \
+    python3-pip \
    tzdata \
    libreadline-dev \
    libicu-dev \
    bsdutils \
    curl \
-    python-pika \
+    python3-pika \
    liblua5.1-dev \
    luajit \
    libssl-dev \
@ -37,7 +37,7 @@ RUN apt-get update \
 ENV TZ=Europe/Moscow
 RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone

-RUN pip install urllib3==1.23 pytest docker-compose==1.22.0 docker dicttoxml kazoo PyMySQL psycopg2==2.7.5 pymongo tzlocal kafka-python protobuf redis aerospike pytest-timeout minio rpm-confluent-schemaregistry grpcio grpcio-tools cassandra-driver
+RUN python3 -m pip install urllib3==1.23 pytest docker-compose==1.22.0 docker dicttoxml kazoo PyMySQL psycopg2==2.7.5 pymongo tzlocal kafka-python protobuf redis aerospike pytest-timeout minio grpcio grpcio-tools cassandra-driver confluent-kafka avro

 ENV DOCKER_CHANNEL stable
 ENV DOCKER_VERSION 17.09.1-ce
--- a/docker/test/integration/runner/compose/docker_compose_kerberized_kafka.yml
+++ b/docker/test/integration/runner/compose/docker_compose_kerberized_kafka.yml
@ -0,0 +1,59 @@
+version: '2.3'
+
+services:
+  kafka_kerberized_zookeeper:
+    image: confluentinc/cp-zookeeper:5.2.0
+    # restart: always
+    hostname: kafka_kerberized_zookeeper
+    environment:
+        ZOOKEEPER_SERVER_ID: 1
+        ZOOKEEPER_CLIENT_PORT: 2181
+        ZOOKEEPER_SERVERS: "kafka_kerberized_zookeeper:2888:3888"
+        KAFKA_OPTS: "-Djava.security.auth.login.config=/etc/kafka/secrets/zookeeper_jaas.conf -Djava.security.krb5.conf=/etc/kafka/secrets/krb.conf -Dzookeeper.authProvider.1=org.apache.zookeeper.server.auth.SASLAuthenticationProvider -Dsun.security.krb5.debug=true"
+    volumes:
+        - ${KERBERIZED_KAFKA_DIR}/secrets:/etc/kafka/secrets
+        - /dev/urandom:/dev/random
+    depends_on:
+        - kafka_kerberos
+    security_opt:
+        - label:disable
+
+  kerberized_kafka1:
+    image: confluentinc/cp-kafka:5.2.0
+    # restart: always
+    hostname: kerberized_kafka1
+    ports:
+        - "9092:9092"
+        - "9093:9093"
+    environment:
+        KAFKA_LISTENERS: OUTSIDE://:19092,UNSECURED_OUTSIDE://:19093,UNSECURED_INSIDE://:9093
+        KAFKA_ADVERTISED_LISTENERS: OUTSIDE://kerberized_kafka1:19092,UNSECURED_OUTSIDE://kerberized_kafka1:19093,UNSECURED_INSIDE://localhost:9093
+        # KAFKA_LISTENERS: INSIDE://kerberized_kafka1:9092,OUTSIDE://kerberized_kafka1:19092
+        # KAFKA_ADVERTISED_LISTENERS: INSIDE://localhost:9092,OUTSIDE://kerberized_kafka1:19092
+        KAFKA_SASL_MECHANISM_INTER_BROKER_PROTOCOL: GSSAPI
+        KAFKA_SASL_ENABLED_MECHANISMS: GSSAPI
+        KAFKA_SASL_KERBEROS_SERVICE_NAME: kafka
+        KAFKA_LISTENER_SECURITY_PROTOCOL_MAP: OUTSIDE:SASL_PLAINTEXT,UNSECURED_OUTSIDE:PLAINTEXT,UNSECURED_INSIDE:PLAINTEXT,
+        KAFKA_INTER_BROKER_LISTENER_NAME: OUTSIDE
+        KAFKA_BROKER_ID: 1
+        KAFKA_ZOOKEEPER_CONNECT: "kafka_kerberized_zookeeper:2181"
+        KAFKA_LOG4J_LOGGERS: "kafka.controller=INFO,kafka.producer.async.DefaultEventHandler=INFO,state.change.logger=INFO"
+        KAFKA_OFFSETS_TOPIC_REPLICATION_FACTOR: 1
+        KAFKA_OPTS: "-Djava.security.auth.login.config=/etc/kafka/secrets/broker_jaas.conf -Djava.security.krb5.conf=/etc/kafka/secrets/krb.conf -Dsun.security.krb5.debug=true"
+    volumes:
+        - ${KERBERIZED_KAFKA_DIR}/secrets:/etc/kafka/secrets
+        - /dev/urandom:/dev/random
+    depends_on:
+        - kafka_kerberized_zookeeper
+        - kafka_kerberos
+    security_opt:
+        - label:disable
+
+  kafka_kerberos:
+    image: yandex/clickhouse-kerberos-kdc:${DOCKER_KERBEROS_KDC_TAG}
+    hostname: kafka_kerberos
+    volumes:
+        - ${KERBERIZED_KAFKA_DIR}/secrets:/tmp/keytab
+        - ${KERBERIZED_KAFKA_DIR}/../../kerberos_image_config.sh:/config.sh
+        - /dev/urandom:/dev/random
+    ports: [88, 749]
--- a/docker/test/integration/runner/dockerd-entrypoint.sh
+++ b/docker/test/integration/runner/dockerd-entrypoint.sh
@ -7,7 +7,7 @@ set +e
 reties=0
 while true; do
    docker info &>/dev/null && break
-    reties=$[$reties+1]
+    reties=$((reties+1))
    if [[ $reties -ge 100 ]]; then # 10 sec max
        echo "Can't start docker daemon, timeout exceeded." >&2
        exit 1;
@ -27,6 +27,7 @@ export DOCKER_MYSQL_JAVA_CLIENT_TAG=${DOCKER_MYSQL_JAVA_CLIENT_TAG:=latest}
 export DOCKER_MYSQL_JS_CLIENT_TAG=${DOCKER_MYSQL_JS_CLIENT_TAG:=latest}
 export DOCKER_MYSQL_PHP_CLIENT_TAG=${DOCKER_MYSQL_PHP_CLIENT_TAG:=latest}
 export DOCKER_POSTGRESQL_JAVA_CLIENT_TAG=${DOCKER_POSTGRESQL_JAVA_CLIENT_TAG:=latest}
+export DOCKER_KERBEROS_KDC_TAG=${DOCKER_KERBEROS_KDC_TAG:=latest}

 cd /ClickHouse/tests/integration
 exec "$@"
--- a/docker/test/performance-comparison/compare-releases.sh
+++ b/docker/test/performance-comparison/compare-releases.sh
@ -9,7 +9,7 @@ right_version=${2}

 if [ "$left_version" == "" ] || [ "$right_version" == "" ]
 then
-    >&2 echo Usage: $(basename "$0") left_version right_version
+    >&2 echo "Usage: $(basename "$0") left_version right_version"
    exit 1
 fi

--- a/docker/test/performance-comparison/compare.sh
+++ b/docker/test/performance-comparison/compare.sh
@ -181,6 +181,9 @@ function run_tests
    # Randomize test order.
    test_files=$(for f in $test_files; do echo "$f"; done | sort -R)

+    # Limit profiling time to 10 minutes, not to run for too long.
+    profile_seconds_left=600
+
    # Run the tests.
    test_name="<none>"
    for test in $test_files
@ -194,15 +197,24 @@ function run_tests
        test_name=$(basename "$test" ".xml")
        echo test "$test_name"

+        # Don't profile if we're past the time limit.
+        # Use awk because bash doesn't support floating point arithmetics.
+        profile_seconds=$(awk "BEGIN { print ($profile_seconds_left > 0 ? 10 : 0) }")
+
        TIMEFORMAT=$(printf "$test_name\t%%3R\t%%3U\t%%3S\n")
        # The grep is to filter out set -x output and keep only time output.
        # The '2>&1 >/dev/null' redirects stderr to stdout, and discards stdout.
        { \
            time "$script_dir/perf.py" --host localhost localhost --port 9001 9002 \
                --runs "$CHPC_RUNS" --max-queries "$CHPC_MAX_QUERIES" \
+                --profile-seconds "$profile_seconds" \
                -- "$test" > "$test_name-raw.tsv" 2> "$test_name-err.log" ; \
        } 2>&1 >/dev/null | tee >(grep -v ^+ >> "wall-clock-times.tsv") \
            || echo "Test $test_name failed with error code $?" >> "$test_name-err.log"
+
+        profile_seconds_left=$(awk -F'	' \
+            'BEGIN { s = '$profile_seconds_left'; } /^profile-total/ { s -= $2 } END { print s }' \
+            "$test_name-raw.tsv")
    done

    unset TIMEFORMAT
@ -294,6 +306,7 @@ for test_file in *-raw.tsv
 do
    test_name=$(basename "$test_file" "-raw.tsv")
    sed -n "s/^query\t/$test_name\t/p" < "$test_file" >> "analyze/query-runs.tsv"
+    sed -n "s/^profile\t/$test_name\t/p" < "$test_file" >> "analyze/query-profiles.tsv"
    sed -n "s/^client-time\t/$test_name\t/p" < "$test_file" >> "analyze/client-times.tsv"
    sed -n "s/^report-threshold\t/$test_name\t/p" < "$test_file" >> "analyze/report-thresholds.tsv"
    sed -n "s/^skipped\t/$test_name\t/p" < "$test_file" >> "analyze/skipped-tests.tsv"
@ -658,13 +671,15 @@ create view test_runs as
    group by test
    ;

-create table test_times_report engine File(TSV, 'report/test-times.tsv') as
-    select wall_clock_time_per_test.test, real,
-        toDecimal64(total_client_time, 3),
+create view test_times_view as
+    select
+        wall_clock_time_per_test.test test,
+        real,
+        total_client_time,
        queries,
-        toDecimal64(query_max, 3),
-        toDecimal64(real / queries, 3) avg_real_per_query,
-        toDecimal64(query_min, 3),
+        query_max,
+        real / queries avg_real_per_query,
+        query_min,
        runs
    from test_time
        -- wall clock times are also measured for skipped tests, so don't
@ -673,7 +688,43 @@ create table test_times_report engine File(TSV, 'report/test-times.tsv') as
            on wall_clock_time_per_test.test = test_time.test
        full join test_runs
            on test_runs.test = test_time.test
-    order by avg_real_per_query desc;
+    ;
+
+-- WITH TOTALS doesn't work with INSERT SELECT, so we have to jump through these
+-- hoops: https://github.com/ClickHouse/ClickHouse/issues/15227
+create view test_times_view_total as
+    select
+        'Total' test,
+        sum(real),
+        sum(total_client_time),
+        sum(queries),
+        max(query_max),
+        sum(real) / sum(queries) avg_real_per_query,
+        min(query_min),
+        -- Totaling the number of runs doesn't make sense, but use the max so
+        -- that the reporting script doesn't complain about queries being too
+        -- long.
+        max(runs)
+    from test_times_view
+    ;
+
+create table test_times_report engine File(TSV, 'report/test-times.tsv') as
+    select
+        test,
+        toDecimal64(real, 3),
+        toDecimal64(total_client_time, 3),
+        queries,
+        toDecimal64(query_max, 3),
+        toDecimal64(avg_real_per_query, 3),
+        toDecimal64(query_min, 3),
+        runs
+    from (
+        select * from test_times_view
+        union all
+        select * from test_times_view_total
+        )
+    order by test = 'Total' desc, avg_real_per_query desc
+    ;

 -- report for all queries page, only main metric
 create table all_tests_report engine File(TSV, 'report/all-queries.tsv') as
@ -694,13 +745,12 @@ create table all_tests_report engine File(TSV, 'report/all-queries.tsv') as
        test, query_index, query_display_name
    from queries order by test, query_index;

-- queries for which we will build flamegraphs (see below)
-create table queries_for_flamegraph engine File(TSVWithNamesAndTypes,
-        'report/queries-for-flamegraph.tsv') as
-    select test, query_index from queries where unstable_show or changed_show
-    ;
-

+-- Report of queries that have inconsistent 'short' markings:
+-- 1) have short duration, but are not marked as 'short'
+-- 2) the reverse -- marked 'short' but take too long.
+-- The threshold for 2) is significantly larger than the threshold for 1), to
+-- avoid jitter.
 create view shortness
    as select 
        (test, query_index) in
@ -718,11 +768,6 @@ create view shortness
                and times.query_index = query_display_names.query_index
    ;

-- Report of queries that have inconsistent 'short' markings:
-- 1) have short duration, but are not marked as 'short'
-- 2) the reverse -- marked 'short' but take too long.
-- The threshold for 2) is significantly larger than the threshold for 1), to
-- avoid jitter.
 create table inconsistent_short_marking_report
    engine File(TSV, 'report/unexpected-query-duration.tsv')
    as select
@ -759,18 +804,15 @@ create table all_query_metrics_tsv engine File(TSV, 'report/all-query-metrics.ts
 " 2> >(tee -a report/errors.log 1>&2)


-# Prepare source data for metrics and flamegraphs for unstable queries.
+# Prepare source data for metrics and flamegraphs for queries that were profiled
+# by perf.py.
 for version in {right,left}
 do
    rm -rf data
    clickhouse-local --query "
-create view queries_for_flamegraph as
-    select * from file('report/queries-for-flamegraph.tsv', TSVWithNamesAndTypes,
-        'test text, query_index int');
-
-create view query_runs as
+create view query_profiles as
    with 0 as left, 1 as right
-    select * from file('analyze/query-runs.tsv', TSV,
+    select * from file('analyze/query-profiles.tsv', TSV,
        'test text, query_index int, query_id text, version UInt8, time float')
    where version = $version
    ;
@ -782,15 +824,12 @@ create view query_display_names as select * from

 create table unstable_query_runs engine File(TSVWithNamesAndTypes,
        'unstable-query-runs.$version.rep') as
-    select query_runs.test test, query_runs.query_index query_index,
+    select query_profiles.test test, query_profiles.query_index query_index,
        query_display_name, query_id
-    from query_runs
-    join queries_for_flamegraph on
-        query_runs.test = queries_for_flamegraph.test
-        and query_runs.query_index = queries_for_flamegraph.query_index
+    from query_profiles
    left join query_display_names on
-        query_runs.test = query_display_names.test
-        and query_runs.query_index = query_display_names.query_index
+        query_profiles.test = query_display_names.test
+        and query_profiles.query_index = query_display_names.query_index
    ;

 create view query_log as select *
--- a/docker/test/performance-comparison/download.sh
+++ b/docker/test/performance-comparison/download.sh
@ -10,7 +10,7 @@ mkdir left ||:
 left_pr=$1
 left_sha=$2

-right_pr=$3
+# right_pr=$3 not used for now
 right_sha=$4

 datasets=${CHPC_DATASETS:-"hits1 hits10 hits100 values"}
--- a/docker/test/performance-comparison/perf.py
+++ b/docker/test/performance-comparison/perf.py
@ -18,9 +18,22 @@ import xml.etree.ElementTree as et
 from threading import Thread
 from scipy import stats

+
+total_start_seconds = time.perf_counter()
+stage_start_seconds = total_start_seconds
+
+def reportStageEnd(stage):
+    global stage_start_seconds, total_start_seconds
+
+    current = time.perf_counter()
+    print(f'stage\t{stage}\t{current - stage_start_seconds:.3f}\t{current - total_start_seconds:.3f}')
+    stage_start_seconds = current
+
+
 def tsv_escape(s):
    return s.replace('\\', '\\\\').replace('\t', '\\t').replace('\n', '\\n').replace('\r','')

+
 parser = argparse.ArgumentParser(description='Run performance test.')
 # Explicitly decode files as UTF-8 because sometimes we have Russian characters in queries, and LANG=C is set.
 parser.add_argument('file', metavar='FILE', type=argparse.FileType('r', encoding='utf-8'), nargs=1, help='test description file')
@ -29,16 +42,21 @@ parser.add_argument('--port', nargs='*', default=[9000], help="Space-separated l
 parser.add_argument('--runs', type=int, default=1, help='Number of query runs per server.')
 parser.add_argument('--max-queries', type=int, default=None, help='Test no more than this number of queries, chosen at random.')
 parser.add_argument('--queries-to-run', nargs='*', type=int, default=None, help='Space-separated list of indexes of queries to test.')
+parser.add_argument('--profile-seconds', type=int, default=0, help='For how many seconds to profile a query for which the performance has changed.')
 parser.add_argument('--long', action='store_true', help='Do not skip the tests tagged as long.')
 parser.add_argument('--print-queries', action='store_true', help='Print test queries and exit.')
 parser.add_argument('--print-settings', action='store_true', help='Print test settings and exit.')
 args = parser.parse_args()

+reportStageEnd('start')
+
 test_name = os.path.splitext(os.path.basename(args.file[0].name))[0]

 tree = et.parse(args.file[0])
 root = tree.getroot()

+reportStageEnd('parse')
+
 # Process query parameters
 subst_elems = root.findall('substitutions/substitution')
 available_parameters = {} # { 'table': ['hits_10m', 'hits_100m'], ... }
@ -78,11 +96,16 @@ for e in root.findall('query'):

 assert(len(test_queries) == len(is_short))

+# If we're given a list of queries to run, check that it makes sense.
+for i in args.queries_to_run or []:
+    if i < 0 or i >= len(test_queries):
+        print(f'There is no query no. {i} in this test, only [{0}-{len(test_queries) - 1}] are present')
+        exit(1)

-# If we're only asked to print the queries, do that and exit
+# If we're only asked to print the queries, do that and exit.
 if args.print_queries:
-    for q in test_queries:
-        print(q)
+    for i in args.queries_to_run or range(0, len(test_queries)):
+        print(test_queries[i])
    exit(0)

 # Print short queries
@ -107,15 +130,21 @@ if not args.long:
            sys.exit(0)

 # Print report threshold for the test if it is set.
+ignored_relative_change = 0.05
 if 'max_ignored_relative_change' in root.attrib:
-    print(f'report-threshold\t{root.attrib["max_ignored_relative_change"]}')
+    ignored_relative_change = float(root.attrib["max_ignored_relative_change"])
+    print(f'report-threshold\t{ignored_relative_change}')
+
+reportStageEnd('before-connect')

 # Open connections
-servers = [{'host': host, 'port': port} for (host, port) in zip(args.host, args.port)]
+servers = [{'host': host or args.host[0], 'port': port or args.port[0]} for (host, port) in itertools.zip_longest(args.host, args.port)]
 all_connections = [clickhouse_driver.Client(**server) for server in servers]

-for s in servers:
-    print('server\t{}\t{}'.format(s['host'], s['port']))
+for i, s in enumerate(servers):
+    print(f'server\t{i}\t{s["host"]}\t{s["port"]}')
+
+reportStageEnd('connect')

 # Run drop queries, ignoring errors. Do this before all other activity, because
 # clickhouse_driver disconnects on error (this is not configurable), and the new
@ -130,6 +159,8 @@ for conn_index, c in enumerate(all_connections):
        except:
            pass

+reportStageEnd('drop-1')
+
 # Apply settings.
 # If there are errors, report them and continue -- maybe a new test uses a setting
 # that is not in master, but the queries can still run. If we have multiple
@ -147,6 +178,8 @@ for conn_index, c in enumerate(all_connections):
        except:
            print(traceback.format_exc(), file=sys.stderr)

+reportStageEnd('settings')
+
 # Check tables that should exist. If they don't exist, just skip this test.
 tables = [e.text for e in root.findall('preconditions/table_exists')]
 for t in tables:
@ -159,6 +192,8 @@ for t in tables:
            print(f'skipped\t{tsv_escape(skipped_message)}')
            sys.exit(0)

+reportStageEnd('preconditions')
+
 # Run create and fill queries. We will run them simultaneously for both servers,
 # to save time.
 # The weird search is to keep the relative order of elements, which matters, and
@ -189,6 +224,9 @@ for t in threads:
 for t in threads:
    t.join()

+reportStageEnd('create')
+
+# By default, test all queries.
 queries_to_run = range(0, len(test_queries))

 if args.max_queries:
@ -196,15 +234,11 @@ if args.max_queries:
    queries_to_run = random.sample(range(0, len(test_queries)), min(len(test_queries), args.max_queries))

 if args.queries_to_run:
-    # Run the specified queries, with some sanity check.
-    for i in args.queries_to_run:
-        if i < 0 or i >= len(test_queries):
-            print(f'There is no query no. "{i}" in this test, only [{0}-{len(test_queries) - 1}] are present')
-            exit(1)
-
+    # Run the specified queries.
    queries_to_run = args.queries_to_run

 # Run test queries.
+profile_total_seconds = 0
 for query_index in queries_to_run:
    q = test_queries[query_index]
    query_prefix = f'{test_name}.query{query_index}'
@ -324,34 +358,49 @@ for query_index in queries_to_run:
    client_seconds = time.perf_counter() - start_seconds
    print(f'client-time\t{query_index}\t{client_seconds}\t{server_seconds}')

-    #print(all_server_times)
-    #print(stats.ttest_ind(all_server_times[0], all_server_times[1], equal_var = False).pvalue)
-
    # Run additional profiling queries to collect profile data, but only if test times appeared to be different.
    # We have to do it after normal runs because otherwise it will affect test statistics too much
-    if len(all_server_times) == 2 and stats.ttest_ind(all_server_times[0], all_server_times[1], equal_var = False).pvalue < 0.1:
-        run = 0
-        while True:
-            run_id = f'{query_prefix}.profile{run}'
+    if len(all_server_times) != 2:
+        continue

-            for conn_index, c in enumerate(this_query_connections):
-                try:
-                    res = c.execute(q, query_id = run_id, settings = {'query_profiler_real_time_period_ns': 10000000})
-                    print(f'profile\t{query_index}\t{run_id}\t{conn_index}\t{c.last_query.elapsed}')
-                except Exception as e:
-                    # Add query id to the exception to make debugging easier.
-                    e.args = (run_id, *e.args)
-                    e.message = run_id + ': ' + e.message
-                    raise
+    if len(all_server_times[0]) < 3:
+        # Don't fail if for some reason there are not enough measurements.
+        continue

-                elapsed = c.last_query.elapsed
-                profile_seconds += elapsed
+    pvalue = stats.ttest_ind(all_server_times[0], all_server_times[1], equal_var = False).pvalue
+    median = [statistics.median(t) for t in all_server_times]
+    # Keep this consistent with the value used in report. Should eventually move
+    # to (median[1] - median[0]) / min(median), which is compatible with "times"
+    # difference we use in report (max(median) / min(median)).
+    relative_diff = (median[1] - median[0]) / median[0]
+    print(f'diff\t{query_index}\t{median[0]}\t{median[1]}\t{relative_diff}\t{pvalue}')
+    if abs(relative_diff) < ignored_relative_change or pvalue > 0.05:
+        continue

-            run += 1
-            # Don't spend too much time for profile runs
-            if run > args.runs or profile_seconds > 10:
-                break
-            # And don't bother with short queries
+    # Perform profile runs for fixed amount of time. Don't limit the number
+    # of runs, because we also have short queries.
+    profile_start_seconds = time.perf_counter()
+    run = 0
+    while time.perf_counter() - profile_start_seconds < args.profile_seconds:
+        run_id = f'{query_prefix}.profile{run}'
+
+        for conn_index, c in enumerate(this_query_connections):
+            try:
+                res = c.execute(q, query_id = run_id, settings = {'query_profiler_real_time_period_ns': 10000000})
+                print(f'profile\t{query_index}\t{run_id}\t{conn_index}\t{c.last_query.elapsed}')
+            except Exception as e:
+                # Add query id to the exception to make debugging easier.
+                e.args = (run_id, *e.args)
+                e.message = run_id + ': ' + e.message
+                raise
+
+        run += 1
+
+    profile_total_seconds += time.perf_counter() - profile_start_seconds
+
+print(f'profile-total\t{profile_total_seconds}')
+
+reportStageEnd('run')

 # Run drop queries
 drop_queries = substitute_parameters(drop_query_templates)
@ -359,3 +408,5 @@ for conn_index, c in enumerate(all_connections):
    for q in drop_queries:
        c.execute(q)
        print(f'drop\t{conn_index}\t{c.last_query.elapsed}\t{tsv_escape(q)}')
+
+reportStageEnd('drop-2')
--- a/docker/test/performance-comparison/report.py
+++ b/docker/test/performance-comparison/report.py
@ -312,7 +312,7 @@ def add_errors_explained():


 if args.report == 'main':
-    print(header_template.format())
+    print((header_template.format()))

    add_tested_commits()

@ -487,7 +487,7 @@ if args.report == 'main':
        for r in rows:
            anchor = f'{currentTableAnchor()}.{r[0]}'
            total_runs = (int(r[7]) + 1) * 2  # one prewarm run, two servers
-            if float(r[5]) > allowed_average_run_time * total_runs:
+            if r[0] != 'Total' and float(r[5]) > allowed_average_run_time * total_runs:
                # FIXME should be 15s max -- investigate parallel_insert
                slow_average_tests += 1
                attrs[5] = f'style="background: {color_bad}"'
@ -495,7 +495,7 @@ if args.report == 'main':
            else:
                attrs[5] = ''

-            if float(r[4]) > allowed_single_run_time * total_runs:
+            if r[0] != 'Total' and float(r[4]) > allowed_single_run_time * total_runs:
                slow_average_tests += 1
                attrs[4] = f'style="background: {color_bad}"'
                errors_explained.append([f'<a href="./all-queries.html#all-query-times.{r[0]}.0">Some query of the test \'{r[0]}\' is too slow to run. See the all queries report'])
@ -571,14 +571,14 @@ if args.report == 'main':
        status = 'failure'
        message = 'Errors while building the report.'

-    print("""
+    print(("""
    <!--status: {status}-->
    <!--message: {message}-->
-    """.format(status=status, message=message))
+    """.format(status=status, message=message)))

 elif args.report == 'all-queries':

-    print(header_template.format())
+    print((header_template.format()))

    add_tested_commits()

--- a/docker/test/stateful/Dockerfile
+++ b/docker/test/stateful/Dockerfile
@ -4,7 +4,7 @@ FROM yandex/clickhouse-stateless-test
 RUN apt-get update -y \
    && env DEBIAN_FRONTEND=noninteractive \
        apt-get install --yes --no-install-recommends \
-        python-requests \
+        python3-requests \
        llvm-9

 COPY s3downloader /s3downloader
--- a/docker/test/stateful/run.sh
+++ b/docker/test/stateful/run.sh
@ -26,11 +26,12 @@ function start()
        fi
        timeout 120 service clickhouse-server start
        sleep 0.5
-        counter=$(($counter + 1))
+        counter=$((counter + 1))
    done
 }

 start
+# shellcheck disable=SC2086 # No quotes because I want to split it into words.
 /s3downloader --dataset-names $DATASETS
 chmod 777 -R /var/lib/clickhouse
 clickhouse-client --query "SHOW DATABASES"
@ -43,8 +44,8 @@ clickhouse-client --query "RENAME TABLE datasets.hits_v1 TO test.hits"
 clickhouse-client --query "RENAME TABLE datasets.visits_v1 TO test.visits"
 clickhouse-client --query "SHOW TABLES FROM test"

-if cat /usr/bin/clickhouse-test | grep -q -- "--use-skip-list"; then
+if grep -q -- "--use-skip-list" /usr/bin/clickhouse-test ; then
    SKIP_LIST_OPT="--use-skip-list"
 fi

-clickhouse-test --testname --shard --zookeeper --no-stateless "$SKIP_LIST_OPT" $ADDITIONAL_OPTIONS $SKIP_TESTS_OPTION 2>&1 | ts '%Y-%m-%d %H:%M:%S' | tee test_output/test_result.txt
+clickhouse-test --testname --shard --zookeeper --no-stateless "$SKIP_LIST_OPT" "$ADDITIONAL_OPTIONS" "$SKIP_TESTS_OPTION" 2>&1 | ts '%Y-%m-%d %H:%M:%S' | tee test_output/test_result.txt
--- a/docker/test/stateful/s3downloader
+++ b/docker/test/stateful/s3downloader
@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 import os
 import sys
@ -29,7 +29,7 @@ def dowload_with_progress(url, path):
    logging.info("Downloading from %s to temp path %s", url, path)
    for i in range(RETRIES_COUNT):
        try:
-            with open(path, 'w') as f:
+            with open(path, 'wb') as f:
                response = requests.get(url, stream=True)
                response.raise_for_status()
                total_length = response.headers.get('content-length')
@ -74,7 +74,7 @@ if __name__ == "__main__":
    parser = argparse.ArgumentParser(
        description="Simple tool for dowloading datasets for clickhouse from S3")

-    parser.add_argument('--dataset-names', required=True, nargs='+', choices=AVAILABLE_DATASETS.keys())
+    parser.add_argument('--dataset-names', required=True, nargs='+', choices=list(AVAILABLE_DATASETS.keys()))
    parser.add_argument('--url-prefix', default=DEFAULT_URL)
    parser.add_argument('--clickhouse-data-path', default='/var/lib/clickhouse/')

--- a/docker/test/stateful_with_coverage/Dockerfile
+++ b/docker/test/stateful_with_coverage/Dockerfile
@ -6,7 +6,7 @@ RUN echo "deb [trusted=yes] http://apt.llvm.org/bionic/ llvm-toolchain-bionic-9
 RUN apt-get update -y \
    && env DEBIAN_FRONTEND=noninteractive \
        apt-get install --yes --no-install-recommends \
-        python-requests
+        python3-requests

 COPY s3downloader /s3downloader
 COPY run.sh /run.sh
--- a/docker/test/stateful_with_coverage/run.sh
+++ b/docker/test/stateful_with_coverage/run.sh
@ -1,15 +1,15 @@
 #!/bin/bash

 kill_clickhouse () {
-    kill `pgrep -u clickhouse` 2>/dev/null
+    kill "$(pgrep -u clickhouse)" 2>/dev/null

-    for i in {1..10}
+    for _ in {1..10}
    do
-        if ! kill -0 `pgrep -u clickhouse`; then
+        if ! kill -0 "$(pgrep -u clickhouse)"; then
            echo "No clickhouse process"
            break
        else
-            echo "Process" `pgrep -u clickhouse` "still alive"
+            echo "Process $(pgrep -u clickhouse) still alive"
            sleep 10
        fi
    done
@ -20,19 +20,19 @@ start_clickhouse () {
 }

 wait_llvm_profdata () {
-    while kill -0 `pgrep llvm-profdata-10`;
+    while kill -0 "$(pgrep llvm-profdata-10)"
    do
-        echo "Waiting for profdata" `pgrep llvm-profdata-10` "still alive"
+        echo "Waiting for profdata $(pgrep llvm-profdata-10) still alive"
        sleep 3
    done
 }

 merge_client_files_in_background () {
-    client_files=`ls /client_*profraw 2>/dev/null`
-    if [ ! -z "$client_files" ]
+    client_files=$(ls /client_*profraw 2>/dev/null)
+    if [ -n "$client_files" ]
    then
-        llvm-profdata-10 merge -sparse $client_files -o merged_client_`date +%s`.profraw
-        rm $client_files
+        llvm-profdata-10 merge -sparse "$client_files" -o "merged_client_$(date +%s).profraw"
+        rm "$client_files"
    fi
 }

@ -66,12 +66,13 @@ function start()
        fi
        timeout 120 service clickhouse-server start
        sleep 0.5
-        counter=$(($counter + 1))
+        counter=$((counter + 1))
    done
 }

 start

+# shellcheck disable=SC2086 # No quotes because I want to split it into words.
 if ! /s3downloader --dataset-names $DATASETS; then
    echo "Cannot download datatsets"
    exit 1
@ -100,11 +101,11 @@ LLVM_PROFILE_FILE='client_%h_%p_%m.profraw' clickhouse-client --query "RENAME TA
 LLVM_PROFILE_FILE='client_%h_%p_%m.profraw' clickhouse-client --query "RENAME TABLE datasets.visits_v1 TO test.visits"
 LLVM_PROFILE_FILE='client_%h_%p_%m.profraw' clickhouse-client --query "SHOW TABLES FROM test"

-if cat /usr/bin/clickhouse-test | grep -q -- "--use-skip-list"; then
+if grep -q -- "--use-skip-list" /usr/bin/clickhouse-test; then
    SKIP_LIST_OPT="--use-skip-list"
 fi

-LLVM_PROFILE_FILE='client_%h_%p_%m.profraw' clickhouse-test --testname --shard --zookeeper --no-stateless "$SKIP_LIST_OPT" $ADDITIONAL_OPTIONS $SKIP_TESTS_OPTION 2>&1 | ts '%Y-%m-%d %H:%M:%S' | tee test_output/test_result.txt
+LLVM_PROFILE_FILE='client_%h_%p_%m.profraw' clickhouse-test --testname --shard --zookeeper --no-stateless "$SKIP_LIST_OPT" "$ADDITIONAL_OPTIONS" "$SKIP_TESTS_OPTION" 2>&1 | ts '%Y-%m-%d %H:%M:%S' | tee test_output/test_result.txt

 kill_clickhouse

--- a/docker/test/stateful_with_coverage/s3downloader
+++ b/docker/test/stateful_with_coverage/s3downloader
@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 import os
 import sys
@ -74,7 +74,7 @@ if __name__ == "__main__":
    parser = argparse.ArgumentParser(
        description="Simple tool for dowloading datasets for clickhouse from S3")

-    parser.add_argument('--dataset-names', required=True, nargs='+', choices=AVAILABLE_DATASETS.keys())
+    parser.add_argument('--dataset-names', required=True, nargs='+', choices=list(AVAILABLE_DATASETS.keys()))
    parser.add_argument('--url-prefix', default=DEFAULT_URL)
    parser.add_argument('--clickhouse-data-path', default='/var/lib/clickhouse/')

--- a/docker/test/stateless/Dockerfile
+++ b/docker/test/stateless/Dockerfile
@ -12,10 +12,10 @@ RUN apt-get update -y \
            ncdu \
            netcat-openbsd \
            openssl \
-            python \
-            python-lxml \
-            python-requests \
-            python-termcolor \
+            python3 \
+            python3-lxml \
+            python3-requests \
+            python3-termcolor \
            qemu-user-static \
            sudo \
            telnet \
--- a/docker/test/stateless/run.sh
+++ b/docker/test/stateless/run.sh
@ -13,8 +13,8 @@ dpkg -i package_folder/clickhouse-test_*.deb

 service clickhouse-server start && sleep 5

-if cat /usr/bin/clickhouse-test | grep -q -- "--use-skip-list"; then
+if grep -q -- "--use-skip-list" /usr/bin/clickhouse-test; then
    SKIP_LIST_OPT="--use-skip-list"
 fi

-clickhouse-test --testname --shard --zookeeper "$SKIP_LIST_OPT" $ADDITIONAL_OPTIONS $SKIP_TESTS_OPTION 2>&1 | ts '%Y-%m-%d %H:%M:%S' | tee test_output/test_result.txt
+clickhouse-test --testname --shard --zookeeper "$SKIP_LIST_OPT" "$ADDITIONAL_OPTIONS" "$SKIP_TESTS_OPTION" 2>&1 | ts '%Y-%m-%d %H:%M:%S' | tee test_output/test_result.txt
--- a/docker/test/stateless_pytest/Dockerfile
+++ b/docker/test/stateless_pytest/Dockerfile
@ -3,10 +3,10 @@ FROM yandex/clickhouse-test-base

 RUN apt-get update -y && \
    apt-get install -y --no-install-recommends \
-        python-pip \
-        python-setuptools
+        python3-pip \
+        python3-setuptools

-RUN pip install \
+RUN python3 -m pip install \
    pytest \
    pytest-html \
    pytest-timeout \
@ -17,4 +17,4 @@ CMD dpkg -i package_folder/clickhouse-common-static_*.deb; \
    dpkg -i package_folder/clickhouse-server_*.deb;  \
    dpkg -i package_folder/clickhouse-client_*.deb; \
    dpkg -i package_folder/clickhouse-test_*.deb; \
-    python -m pytest /usr/share/clickhouse-test/queries -n $(nproc) --html=test_output/report.html --self-contained-html
+    python3 -m pytest /usr/share/clickhouse-test/queries -n $(nproc) --html=test_output/report.html --self-contained-html
--- a/docker/test/stateless_unbundled/Dockerfile
+++ b/docker/test/stateless_unbundled/Dockerfile
@ -54,10 +54,10 @@ RUN apt-get --allow-unauthenticated update -y \
            perl \
            pigz \
            pkg-config \
-            python \
-            python-lxml \
-            python-requests \
-            python-termcolor \
+            python3 \
+            python3-lxml \
+            python3-requests \
+            python3-termcolor \
            qemu-user-static \
            sudo \
            telnet \
--- a/docker/test/stateless_unbundled/run.sh
+++ b/docker/test/stateless_unbundled/run.sh
@ -13,8 +13,8 @@ dpkg -i package_folder/clickhouse-test_*.deb

 service clickhouse-server start && sleep 5

-if cat /usr/bin/clickhouse-test | grep -q -- "--use-skip-list"; then
+if grep -q -- "--use-skip-list" /usr/bin/clickhouse-test; then
    SKIP_LIST_OPT="--use-skip-list"
 fi

-clickhouse-test --testname --shard --zookeeper "$SKIP_LIST_OPT" $ADDITIONAL_OPTIONS $SKIP_TESTS_OPTION 2>&1 | ts '%Y-%m-%d %H:%M:%S' | tee test_output/test_result.txt
+clickhouse-test --testname --shard --zookeeper "$SKIP_LIST_OPT" "$ADDITIONAL_OPTIONS" "$SKIP_TESTS_OPTION" 2>&1 | ts '%Y-%m-%d %H:%M:%S' | tee test_output/test_result.txt
--- a/docker/test/stateless_with_coverage/Dockerfile
+++ b/docker/test/stateless_with_coverage/Dockerfile
@ -12,10 +12,10 @@ RUN apt-get update -y \
            fakeroot \
            debhelper \
            expect \
-            python \
-            python-lxml \
-            python-termcolor \
-            python-requests \
+            python3 \
+            python3-lxml \
+            python3-termcolor \
+            python3-requests \
            sudo \
            openssl \
            ncdu \
--- a/docker/test/stateless_with_coverage/run.sh
+++ b/docker/test/stateless_with_coverage/run.sh
@ -1,24 +1,24 @@
 #!/bin/bash

 kill_clickhouse () {
-    echo "clickhouse pids" `ps aux | grep clickhouse` | ts '%Y-%m-%d %H:%M:%S'
-    kill `pgrep -u clickhouse` 2>/dev/null
+    echo "clickhouse pids $(pgrep -u clickhouse)" | ts '%Y-%m-%d %H:%M:%S'
+    kill "$(pgrep -u clickhouse)" 2>/dev/null

-    for i in {1..10}
+    for _ in {1..10}
    do
-        if ! kill -0 `pgrep -u clickhouse`; then
+        if ! kill -0 "$(pgrep -u clickhouse)"; then
            echo "No clickhouse process" | ts '%Y-%m-%d %H:%M:%S'
            break
        else
-            echo "Process" `pgrep -u clickhouse` "still alive" | ts '%Y-%m-%d %H:%M:%S'
+            echo "Process $(pgrep -u clickhouse) still alive" | ts '%Y-%m-%d %H:%M:%S'
            sleep 10
        fi
    done

    echo "Will try to send second kill signal for sure"
-    kill `pgrep -u clickhouse` 2>/dev/null
+    kill "$(pgrep -u clickhouse)" 2>/dev/null
    sleep 5
-    echo "clickhouse pids" `ps aux | grep clickhouse` | ts '%Y-%m-%d %H:%M:%S'
+    echo "clickhouse pids $(pgrep -u clickhouse)" | ts '%Y-%m-%d %H:%M:%S'
 }

 start_clickhouse () {
@ -47,11 +47,11 @@ start_clickhouse
 sleep 10


-if cat /usr/bin/clickhouse-test | grep -q -- "--use-skip-list"; then
+if grep -q -- "--use-skip-list" /usr/bin/clickhouse-test; then
    SKIP_LIST_OPT="--use-skip-list"
 fi

-LLVM_PROFILE_FILE='client_coverage.profraw' clickhouse-test --testname --shard --zookeeper "$SKIP_LIST_OPT" $ADDITIONAL_OPTIONS $SKIP_TESTS_OPTION 2>&1 | ts '%Y-%m-%d %H:%M:%S' | tee test_output/test_result.txt
+LLVM_PROFILE_FILE='client_coverage.profraw' clickhouse-test --testname --shard --zookeeper "$SKIP_LIST_OPT" "$ADDITIONAL_OPTIONS" "$SKIP_TESTS_OPTION" 2>&1 | ts '%Y-%m-%d %H:%M:%S' | tee test_output/test_result.txt

 kill_clickhouse

--- a/docker/test/stress/Dockerfile
+++ b/docker/test/stress/Dockerfile
@ -10,10 +10,10 @@ RUN apt-get update -y \
            debhelper \
            parallel \
            expect \
-            python \
-            python-lxml \
-            python-termcolor \
-            python-requests \
+            python3 \
+            python3-lxml \
+            python3-termcolor \
+            python3-requests \
            curl \
            sudo \
            openssl \
--- a/docker/test/stress/run.sh
+++ b/docker/test/stress/run.sh
@ -13,7 +13,7 @@ function stop()
    timeout 120 service clickhouse-server stop

    # Wait for process to disappear from processlist and also try to kill zombies.
-    while kill -9 $(pidof clickhouse-server)
+    while kill -9 "$(pidof clickhouse-server)"
    do
        echo "Killed clickhouse-server"
        sleep 0.5
@ -35,17 +35,21 @@ function start()
        fi
        timeout 120 service clickhouse-server start
        sleep 0.5
-        counter=$(($counter + 1))
+        counter=$((counter + 1))
    done
 }

 # install test configs
 /usr/share/clickhouse-test/config/install.sh

+# for clickhouse-server (via service)
 echo "ASAN_OPTIONS='malloc_context_size=10 verbosity=1 allocator_release_to_os_interval_ms=10000'" >> /etc/environment
+# for clickhouse-client
+export ASAN_OPTIONS='malloc_context_size=10 verbosity=1 allocator_release_to_os_interval_ms=10000'

 start

+# shellcheck disable=SC2086 # No quotes because I want to split it into words.
 /s3downloader --dataset-names $DATASETS
 chmod 777 -R /var/lib/clickhouse
 clickhouse-client --query "ATTACH DATABASE IF NOT EXISTS datasets ENGINE = Ordinary"
--- a/docker/test/stress/stress
+++ b/docker/test/stress/stress
@ -1,4 +1,4 @@
-#!/usr/bin/env python
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 from multiprocessing import cpu_count
 from subprocess import Popen, check_call
--- a/docker/test/test_runner.sh
+++ b/docker/test/test_runner.sh
@ -2,17 +2,19 @@

 set -e -x

+# Not sure why shellcheck complains that rc is not assigned before it is referenced.
+# shellcheck disable=SC2154
 trap 'rc=$?; echo EXITED WITH: $rc; exit $rc' EXIT

 # CLI option to prevent rebuilding images, just re-run tests with images leftover from previuos time
 readonly NO_REBUILD_FLAG="--no-rebuild"

-readonly CLICKHOUSE_DOCKER_DIR="$(realpath ${1})"
+readonly CLICKHOUSE_DOCKER_DIR="$(realpath "${1}")"
 readonly CLICKHOUSE_PACKAGES_ARG="${2}"
 CLICKHOUSE_SERVER_IMAGE="${3}"

-if [ ${CLICKHOUSE_PACKAGES_ARG} != ${NO_REBUILD_FLAG} ]; then
-    readonly CLICKHOUSE_PACKAGES_DIR="$(realpath ${2})" # or --no-rebuild
+if [ "${CLICKHOUSE_PACKAGES_ARG}" != "${NO_REBUILD_FLAG}" ]; then
+    readonly CLICKHOUSE_PACKAGES_DIR="$(realpath "${2}")" # or --no-rebuild
 fi


@ -25,7 +27,7 @@ fi

 # TODO: optionally mount most recent clickhouse-test and queries directory from local machine

-if [ ${CLICKHOUSE_PACKAGES_ARG} != ${NO_REBUILD_FLAG} ]; then
+if [ "${CLICKHOUSE_PACKAGES_ARG}" != "${NO_REBUILD_FLAG}" ]; then
    docker build --network=host \
        -f "${CLICKHOUSE_DOCKER_DIR}/test/stateless/clickhouse-statelest-test-runner.Dockerfile" \
        --target clickhouse-test-runner-base \
@ -49,7 +51,7 @@ fi
 if [ -z "${CLICKHOUSE_SERVER_IMAGE}" ]; then
    CLICKHOUSE_SERVER_IMAGE="yandex/clickhouse-server:local"

-    if [ ${CLICKHOUSE_PACKAGES_ARG} != ${NO_REBUILD_FLAG} ]; then
+    if [ "${CLICKHOUSE_PACKAGES_ARG}" != "${NO_REBUILD_FLAG}" ]; then
        docker build --network=host \
            -f "${CLICKHOUSE_DOCKER_DIR}/server/local.Dockerfile" \
            --target clickhouse-server-base \
--- a/docker/test/testflows/runner/dockerd-entrypoint.sh
+++ b/docker/test/testflows/runner/dockerd-entrypoint.sh
@ -7,7 +7,7 @@ set +e
 reties=0
 while true; do
    docker info &>/dev/null && break
-    reties=$[$reties+1]
+    reties=$((reties+1))
    if [[ $reties -ge 100 ]]; then # 10 sec max
        echo "Can't start docker daemon, timeout exceeded." >&2
        exit 1;
--- a/docs/en/development/build.md
+++ b/docs/en/development/build.md
@ -116,7 +116,7 @@ ninja
 Example for Fedora Rawhide:
 ``` bash
 sudo yum update
-yum --nogpg install git cmake make gcc-c++ python2
+yum --nogpg install git cmake make gcc-c++ python3
 git clone --recursive https://github.com/ClickHouse/ClickHouse.git
 mkdir build && cd build
 cmake ../ClickHouse
--- a/docs/en/engines/table-engines/integrations/kafka.md
+++ b/docs/en/engines/table-engines/integrations/kafka.md
@ -165,6 +165,22 @@ Similar to GraphiteMergeTree, the Kafka engine supports extended configuration u

 For a list of possible configuration options, see the [librdkafka configuration reference](https://github.com/edenhill/librdkafka/blob/master/CONFIGURATION.md). Use the underscore (`_`) instead of a dot in the ClickHouse configuration. For example, `check.crcs=true` will be `<check_crcs>true</check_crcs>`.

+### Kerberos support {#kafka-kerberos-support}
+
+To deal with Kerberos-aware Kafka, add `security_protocol` child element with `sasl_plaintext` value. It is enough if Kerberos ticket-granting ticket is obtained and cached by OS facilities.
+ClickHouse is able to maintain Kerberos credentials using a keytab file. Consider `sasl_kerberos_service_name`, `sasl_kerberos_keytab`, `sasl_kerberos_principal` and `sasl.kerberos.kinit.cmd` child elements.
+
+Example:
+
+``` xml
+  <!-- Kerberos-aware Kafka -->
+  <kafka>
+    <security_protocol>SASL_PLAINTEXT</security_protocol>
+	<sasl_kerberos_keytab>/home/kafkauser/kafkauser.keytab</sasl_kerberos_keytab>
+	<sasl_kerberos_principal>kafkauser/kafkahost@EXAMPLE.COM</sasl_kerberos_principal>
+  </kafka>
+```
+
 ## Virtual Columns {#virtual-columns}

 -   `_topic` — Kafka topic.
--- a/docs/en/interfaces/third-party/client-libraries.md
+++ b/docs/en/interfaces/third-party/client-libraries.md
@ -20,6 +20,7 @@ toc_title: Client Libraries
    -   [simpod/clickhouse-client](https://packagist.org/packages/simpod/clickhouse-client)
    -   [seva-code/php-click-house-client](https://packagist.org/packages/seva-code/php-click-house-client)
    -   [SeasClick C++ client](https://github.com/SeasX/SeasClick)
+    -   [one-ck](https://github.com/lizhichao/one-ck)
 -   Go
    -   [clickhouse](https://github.com/kshvakov/clickhouse/)
    -   [go-clickhouse](https://github.com/roistat/go-clickhouse)
--- a/docs/en/operations/server-configuration-parameters/settings.md
+++ b/docs/en/operations/server-configuration-parameters/settings.md
@ -66,6 +66,32 @@ If no conditions met for a data part, ClickHouse uses the `lz4` compression.
 </compression>
 ```

+## custom_settings_prefixes {#custom_settings_prefixes}
+
+List of prefixes for [custom settings](../../operations/settings/index.md#custom_settings). The prefixes must be separated with commas.
+
+**Example**
+
+```xml
+<custom_settings_prefixes>custom_</custom_settings_prefixes>
+```
+
+**See Also**
+
+-   [Custom settings](../../operations/settings/index.md#custom_settings)
+
+## core_dump
+
+Configures soft limit for core dump file size, one gigabyte by default.
+```xml
+<core_dump>
+    <size_limit>1073741824</size_limit>
+</core_dump> 
+```
+
+(Hard limit is configured via system tools)
+
+
 ## default\_database {#default-database}

 The default database.
@ -405,7 +431,7 @@ Limits total RAM usage by the ClickHouse server.
 Possible values:

 -   Positive integer.
-   0 — Unlimited.
+-   0 (auto).

 Default value: `0`.

--- a/docs/en/operations/settings/index.md
+++ b/docs/en/operations/settings/index.md
@ -28,4 +28,30 @@ Ways to configure settings, in order of priority:

 Settings that can only be made in the server config file are not covered in this section.

+## Custom Settings {#custom_settings}
+
+In addition to the common [settings](../../operations/settings/settings.md), users can define custom settings. 
+
+A custom setting name must begin with one of predefined prefixes. The list of these prefixes must be declared in the [custom_settings_prefixes](../../operations/server-configuration-parameters/settings.md#custom_settings_prefixes) parameter in the server configuration file.
+
+```xml
+<custom_settings_prefixes>custom_</custom_settings_prefixes>
+```
+
+To define a custom setting use `SET` command:
+
+```sql
+SET custom_a = 123;
+```
+
+To get the current value of a custom setting use `getSetting()` function:
+
+```sql
+SELECT getSetting('custom_a');    
+```
+
+**See Also**
+
+-   [Server Configuration Settings](../../operations/server-configuration-parameters/settings.md)
+
 [Original article](https://clickhouse.tech/docs/en/operations/settings/) <!--hide-->
--- a/docs/en/operations/settings/settings.md
+++ b/docs/en/operations/settings/settings.md
@ -70,6 +70,35 @@ Works with tables in the MergeTree family.

 If `force_primary_key=1`, ClickHouse checks to see if the query has a primary key condition that can be used for restricting data ranges. If there is no suitable condition, it throws an exception. However, it does not check whether the condition reduces the amount of data to read. For more information about data ranges in MergeTree tables, see [MergeTree](../../engines/table-engines/mergetree-family/mergetree.md).

+## force\_data\_skipping\_indices {#settings-force_data_skipping_indices}
+
+Disables query execution if passed data skipping indices wasn't used.
+
+Consider the following example:
+
+```sql
+CREATE TABLE data
+(
+    key Int,
+    d1 Int,
+    d1_null Nullable(Int),
+    INDEX d1_idx d1 TYPE minmax GRANULARITY 1,
+    INDEX d1_null_idx assumeNotNull(d1_null) TYPE minmax GRANULARITY 1
+)
+Engine=MergeTree()
+ORDER BY key;
+
+SELECT * FROM data_01515;
+SELECT * FROM data_01515 SETTINGS force_data_skipping_indices=''; -- query will produce CANNOT_PARSE_TEXT error.
+SELECT * FROM data_01515 SETTINGS force_data_skipping_indices='d1_idx'; -- query will produce INDEX_NOT_USED error.
+SELECT * FROM data_01515 WHERE d1 = 0 SETTINGS force_data_skipping_indices='d1_idx'; -- Ok.
+SELECT * FROM data_01515 WHERE d1 = 0 SETTINGS force_data_skipping_indices='`d1_idx`'; -- Ok (example of full featured parser).
+SELECT * FROM data_01515 WHERE d1 = 0 SETTINGS force_data_skipping_indices='`d1_idx`, d1_null_idx'; -- query will produce INDEX_NOT_USED error, since d1_null_idx is not used.
+SELECT * FROM data_01515 WHERE d1 = 0 AND assumeNotNull(d1_null) = 0 SETTINGS force_data_skipping_indices='`d1_idx`, d1_null_idx'; -- Ok.
+```
+
+Works with tables in the MergeTree family.
+
 ## format\_schema {#format-schema}

 This parameter is useful when you are using formats that require a schema definition, such as [Cap’n Proto](https://capnproto.org/) or [Protobuf](https://developers.google.com/protocol-buffers/). The value depends on the format.
@ -1144,9 +1173,9 @@ See also:

 ## insert\_quorum\_timeout {#settings-insert_quorum_timeout}

-Write to quorum timeout in seconds. If the timeout has passed and no write has taken place yet, ClickHouse will generate an exception and the client must repeat the query to write the same block to the same or any other replica.
+Write to quorum timeout in milliseconds. If the timeout has passed and no write has taken place yet, ClickHouse will generate an exception and the client must repeat the query to write the same block to the same or any other replica.

-Default value: 60 seconds.
+Default value: 600000 milliseconds (ten minutes).

 See also:

@ -1565,7 +1594,7 @@ See also:

 ## allow\_introspection\_functions {#settings-allow_introspection_functions}

-Enables of disables [introspections functions](../../sql-reference/functions/introspection.md) for query profiling.
+Enables or disables [introspections functions](../../sql-reference/functions/introspection.md) for query profiling.

 Possible values:

@ -2027,3 +2056,14 @@ Result:
 ```

 [Original article](https://clickhouse.tech/docs/en/operations/settings/settings/) <!-- hide -->
+
+## allow_experimental_bigint_types {#allow_experimental_bigint_types}
+
+Enables or disables integer values exceeding the range that is supported by the int data type.
+
+Possible values:
+
+-   1 — The bigint data type is enabled.
+-   0 — The bigint data type is disabled.
+
+Default value: `0`.
--- a/docs/en/operations/system-tables/query_log.md
+++ b/docs/en/operations/system-tables/query_log.md
@ -33,6 +33,7 @@ Columns:
    -   `'ExceptionWhileProcessing' = 4` — Exception during the query execution.
 -   `event_date` ([Date](../../sql-reference/data-types/date.md)) — Query starting date.
 -   `event_time` ([DateTime](../../sql-reference/data-types/datetime.md)) — Query starting time.
+-   `event_time_microseconds` ([DateTime](../../sql-reference/data-types/datetime.md)) — Query starting time with microseconds precision.
 -   `query_start_time` ([DateTime](../../sql-reference/data-types/datetime.md)) — Start time of query execution.
 -   `query_start_time_microseconds` ([DateTime64](../../sql-reference/data-types/datetime64.md)) — Start time of query execution with microsecond precision.
 -   `query_duration_ms` ([UInt64](../../sql-reference/data-types/int-uint.md#uint-ranges)) — Duration of query execution in milliseconds.
@ -84,54 +85,57 @@ Columns:
 **Example**

 ``` sql
-SELECT * FROM system.query_log LIMIT 1 FORMAT Vertical;
+SELECT * FROM system.query_log LIMIT 1 \G
 ```

 ``` text
 Row 1:
 ──────
-type:                 QueryStart
-event_date:           2020-05-13
-event_time:           2020-05-13 14:02:28
-query_start_time:     2020-05-13 14:02:28
-query_duration_ms:    0
-read_rows:            0
-read_bytes:           0
-written_rows:         0
-written_bytes:        0
-result_rows:          0
-result_bytes:         0
-memory_usage:         0
-query:                SELECT 1
-exception_code:       0
-exception:
-stack_trace:
-is_initial_query:     1
-user:                 default
-query_id:             5e834082-6f6d-4e34-b47b-cd1934f4002a
-address:              ::ffff:127.0.0.1
-port:                 57720
-initial_user:         default
-initial_query_id:     5e834082-6f6d-4e34-b47b-cd1934f4002a
-initial_address:      ::ffff:127.0.0.1
-initial_port:         57720
-interface:            1
-os_user:              bayonet
-client_hostname:      clickhouse.ru-central1.internal
-client_name:          ClickHouse client
-client_revision:      54434
-client_version_major: 20
-client_version_minor: 4
-client_version_patch: 1
-http_method:          0
-http_user_agent:
-quota_key:
-revision:             54434
-thread_ids:           []
-ProfileEvents.Names:  []
-ProfileEvents.Values: []
-Settings.Names:       ['use_uncompressed_cache','load_balancing','log_queries','max_memory_usage']
-Settings.Values:      ['0','random','1','10000000000']
+type:                          QueryStart
+event_date:                    2020-09-11
+event_time:                    2020-09-11 10:08:17
+event_time_microseconds:       2020-09-11 10:08:17.063321
+query_start_time:              2020-09-11 10:08:17
+query_start_time_microseconds: 2020-09-11 10:08:17.063321
+query_duration_ms:             0
+read_rows:                     0
+read_bytes:                    0
+written_rows:                  0
+written_bytes:                 0
+result_rows:                   0
+result_bytes:                  0
+memory_usage:                  0
+current_database:              default
+query:                         INSERT INTO test1 VALUES
+exception_code:                0
+exception:                     
+stack_trace:                   
+is_initial_query:              1
+user:                          default
+query_id:                      50a320fd-85a8-49b8-8761-98a86bcbacef
+address:                       ::ffff:127.0.0.1
+port:                          33452
+initial_user:                  default
+initial_query_id:              50a320fd-85a8-49b8-8761-98a86bcbacef
+initial_address:               ::ffff:127.0.0.1
+initial_port:                  33452
+interface:                     1
+os_user:                       bharatnc
+client_hostname:               tower
+client_name:                   ClickHouse 
+client_revision:               54437
+client_version_major:          20
+client_version_minor:          7
+client_version_patch:          2
+http_method:                   0
+http_user_agent:               
+quota_key:                     
+revision:                      54440
+thread_ids:                    []
+ProfileEvents.Names:           []
+ProfileEvents.Values:          []
+Settings.Names:                ['use_uncompressed_cache','load_balancing','log_queries','max_memory_usage','allow_introspection_functions']
+Settings.Values:               ['0','random','1','10000000000','1']
 ```

 **See Also**
--- a/docs/en/operations/system-tables/query_thread_log.md
+++ b/docs/en/operations/system-tables/query_thread_log.md
@ -15,6 +15,7 @@ Columns:

 -   `event_date` ([Date](../../sql-reference/data-types/date.md)) — The date when the thread has finished execution of the query.
 -   `event_time` ([DateTime](../../sql-reference/data-types/datetime.md)) — The date and time when the thread has finished execution of the query.
+-   `event_time_microsecinds` ([DateTime](../../sql-reference/data-types/datetime.md)) — The date and time when the thread has finished execution of the query with microseconds precision.
 -   `query_start_time` ([DateTime](../../sql-reference/data-types/datetime.md)) — Start time of query execution.
 -   `query_start_time_microseconds` ([DateTime64](../../sql-reference/data-types/datetime64.md)) — Start time of query execution with microsecond precision.
 -   `query_duration_ms` ([UInt64](../../sql-reference/data-types/int-uint.md#uint-ranges)) — Duration of query execution.
@ -63,50 +64,51 @@ Columns:
 **Example**

 ``` sql
- SELECT * FROM system.query_thread_log LIMIT 1 FORMAT Vertical
+ SELECT * FROM system.query_thread_log LIMIT 1 \G
 ```

 ``` text
 Row 1:
 ──────
-event_date:           2020-05-13
-event_time:           2020-05-13 14:02:28
-query_start_time:     2020-05-13 14:02:28
-query_duration_ms:    0
-read_rows:            1
-read_bytes:           1
-written_rows:         0
-written_bytes:        0
-memory_usage:         0
-peak_memory_usage:    0
-thread_name:          QueryPipelineEx
-thread_id:            28952
-master_thread_id:     28924
-query:                SELECT 1
-is_initial_query:     1
-user:                 default
-query_id:             5e834082-6f6d-4e34-b47b-cd1934f4002a
-address:              ::ffff:127.0.0.1
-port:                 57720
-initial_user:         default
-initial_query_id:     5e834082-6f6d-4e34-b47b-cd1934f4002a
-initial_address:      ::ffff:127.0.0.1
-initial_port:         57720
-interface:            1
-os_user:              bayonet
-client_hostname:      clickhouse.ru-central1.internal
-client_name:          ClickHouse client
-client_revision:      54434
-client_version_major: 20
-client_version_minor: 4
-client_version_patch: 1
-http_method:          0
-http_user_agent:
-quota_key:
-revision:             54434
-ProfileEvents.Names:  ['ContextLock','RealTimeMicroseconds','UserTimeMicroseconds','OSCPUWaitMicroseconds','OSCPUVirtualTimeMicroseconds']
-ProfileEvents.Values: [1,97,81,5,81]
-...
+event_date:                    2020-09-11
+event_time:                    2020-09-11 10:08:17
+event_time_microseconds:       2020-09-11 10:08:17.134042
+query_start_time:              2020-09-11 10:08:17
+query_start_time_microseconds: 2020-09-11 10:08:17.063150
+query_duration_ms:             70
+read_rows:                     0
+read_bytes:                    0
+written_rows:                  1
+written_bytes:                 12
+memory_usage:                  4300844
+peak_memory_usage:             4300844
+thread_name:                   TCPHandler
+thread_id:                     638133
+master_thread_id:              638133
+query:                         INSERT INTO test1 VALUES
+is_initial_query:              1
+user:                          default
+query_id:                      50a320fd-85a8-49b8-8761-98a86bcbacef
+address:                       ::ffff:127.0.0.1
+port:                          33452
+initial_user:                  default
+initial_query_id:              50a320fd-85a8-49b8-8761-98a86bcbacef
+initial_address:               ::ffff:127.0.0.1
+initial_port:                  33452
+interface:                     1
+os_user:                       bharatnc
+client_hostname:               tower
+client_name:                   ClickHouse 
+client_revision:               54437
+client_version_major:          20
+client_version_minor:          7
+client_version_patch:          2
+http_method:                   0
+http_user_agent:               
+quota_key:                     
+revision:                      54440
+ProfileEvents.Names:           ['Query','InsertQuery','FileOpen','WriteBufferFromFileDescriptorWrite','WriteBufferFromFileDescriptorWriteBytes','ReadCompressedBytes','CompressedReadBufferBlocks','CompressedReadBufferBytes','IOBufferAllocs','IOBufferAllocBytes','FunctionExecute','CreatedWriteBufferOrdinary','DiskWriteElapsedMicroseconds','NetworkReceiveElapsedMicroseconds','NetworkSendElapsedMicroseconds','InsertedRows','InsertedBytes','SelectedRows','SelectedBytes','MergeTreeDataWriterRows','MergeTreeDataWriterUncompressedBytes','MergeTreeDataWriterCompressedBytes','MergeTreeDataWriterBlocks','MergeTreeDataWriterBlocksAlreadySorted','ContextLock','RWLockAcquiredReadLocks','RealTimeMicroseconds','UserTimeMicroseconds','SoftPageFaults','OSCPUVirtualTimeMicroseconds','OSWriteBytes','OSReadChars','OSWriteChars']
+ProfileEvents.Values:          [1,1,11,11,591,148,3,71,29,6533808,1,11,72,18,47,1,12,1,12,1,12,189,1,1,10,2,70853,2748,49,2747,45056,422,1520]
 ```

 **See Also**
--- a/docs/en/operations/system-tables/text_log.md
+++ b/docs/en/operations/system-tables/text_log.md
@ -6,6 +6,7 @@ Columns:

 -   `event_date` (Date) — Date of the entry.
 -   `event_time` (DateTime) — Time of the entry.
+-   `event_time_microseconds` (DateTime) — Time of the entry with microseconds precision.
 -   `microseconds` (UInt32) — Microseconds of the entry.
 -   `thread_name` (String) — Name of the thread from which the logging was done.
 -   `thread_id` (UInt64) — OS thread ID.
@ -25,4 +26,28 @@ Columns:
 -   `source_file` (LowCardinality(String)) — Source file from which the logging was done.
 -   `source_line` (UInt64) — Source line from which the logging was done.

+**Example**
+
+``` sql
+SELECT * FROM system.text_log LIMIT 1 \G
+```
+
+``` text
+Row 1:
+──────
+event_date:              2020-09-10
+event_time:              2020-09-10 11:23:07
+event_time_microseconds: 2020-09-10 11:23:07.871397
+microseconds:            871397
+thread_name:             clickhouse-serv
+thread_id:               564917
+level:                   Information
+query_id:                
+logger_name:             DNSCacheUpdater
+message:                 Update period 15 seconds
+revision:                54440
+source_file:             /ClickHouse/src/Interpreters/DNSCacheUpdater.cpp; void DB::DNSCacheUpdater::start()
+source_line:             45
+```
+ 
 [Original article](https://clickhouse.tech/docs/en/operations/system_tables/text_log) <!--hide-->
--- a/docs/en/operations/system-tables/trace_log.md
+++ b/docs/en/operations/system-tables/trace_log.md
@ -12,6 +12,8 @@ Columns:

 -   `event_time` ([DateTime](../../sql-reference/data-types/datetime.md)) — Timestamp of the sampling moment.

+-   `event_time_microseconds` ([DateTime](../../sql-reference/data-types/datetime.md)) — Timestamp of the sampling moment with microseconds precision.
+
 -   `timestamp_ns` ([UInt64](../../sql-reference/data-types/int-uint.md)) — Timestamp of the sampling moment in nanoseconds.

 -   `revision` ([UInt32](../../sql-reference/data-types/int-uint.md)) — ClickHouse server build revision.
@ -38,13 +40,16 @@ SELECT * FROM system.trace_log LIMIT 1 \G
 ``` text
 Row 1:
 ──────
-event_date:    2019-11-15
-event_time:    2019-11-15 15:09:38
-revision:      54428
-timer_type:    Real
-thread_number: 48
-query_id:      acc4d61f-5bd1-4a3e-bc91-2180be37c915
-trace:         [94222141367858,94222152240175,94222152325351,94222152329944,94222152330796,94222151449980,94222144088167,94222151682763,94222144088167,94222151682763,94222144088167,94222144058283,94222144059248,94222091840750,94222091842302,94222091831228,94222189631488,140509950166747,140509942945935]
+event_date:              2020-09-10
+event_time:              2020-09-10 11:23:09
+event_time_microseconds: 2020-09-10 11:23:09.872924
+timestamp_ns:            1599762189872924510
+revision:                54440
+trace_type:              Memory
+thread_id:               564963
+query_id:                
+trace:                   [371912858,371912789,371798468,371799717,371801313,371790250,624462773,566365041,566440261,566445834,566460071,566459914,566459842,566459580,566459469,566459389,566459341,566455774,371993941,371988245,372158848,372187428,372187309,372187093,372185478,140222123165193,140222122205443]
+size:                    5244400
 ```

 [Original article](https://clickhouse.tech/docs/en/operations/system_tables/trace_log) <!--hide-->
--- a/docs/en/sql-reference/data-types/decimal.md
+++ b/docs/en/sql-reference/data-types/decimal.md
@ -3,25 +3,27 @@ toc_priority: 42
 toc_title: Decimal
 ---

-# Decimal(P, S), Decimal32(S), Decimal64(S), Decimal128(S) {#decimalp-s-decimal32s-decimal64s-decimal128s}
+# Decimal(P, S), Decimal32(S), Decimal64(S), Decimal128(S), Decimal256(S) {#decimalp-s-decimal32s-decimal64s-decimal128s-decimal256s}

 Signed fixed-point numbers that keep precision during add, subtract and multiply operations. For division least significant digits are discarded (not rounded).

 ## Parameters {#parameters}

-   P - precision. Valid range: \[ 1 : 38 \]. Determines how many decimal digits number can have (including fraction).
+-   P - precision. Valid range: \[ 1 : 76 \]. Determines how many decimal digits number can have (including fraction).
 -   S - scale. Valid range: \[ 0 : P \]. Determines how many decimal digits fraction can have.

 Depending on P parameter value Decimal(P, S) is a synonym for:
 - P from \[ 1 : 9 \] - for Decimal32(S)
 - P from \[ 10 : 18 \] - for Decimal64(S)
 - P from \[ 19 : 38 \] - for Decimal128(S)
+- P from \[ 39 : 76 \] - for Decimal256(S)

 ## Decimal Value Ranges {#decimal-value-ranges}

 -   Decimal32(S) - ( -1 \* 10^(9 - S), 1 \* 10^(9 - S) )
 -   Decimal64(S) - ( -1 \* 10^(18 - S), 1 \* 10^(18 - S) )
 -   Decimal128(S) - ( -1 \* 10^(38 - S), 1 \* 10^(38 - S) )
+-   Decimal256(S) - ( -1 \* 10^(76 - S), 1 \* 10^(76 - S) )

 For example, Decimal32(4) can contain numbers from -99999.9999 to 99999.9999 with 0.0001 step.

@ -38,6 +40,7 @@ Binary operations on Decimal result in wider result type (with any order of argu
 -   `Decimal64(S1) <op> Decimal32(S2) -> Decimal64(S)`
 -   `Decimal128(S1) <op> Decimal32(S2) -> Decimal128(S)`
 -   `Decimal128(S1) <op> Decimal64(S2) -> Decimal128(S)`
+-   `Decimal256(S1) <op> Decimal<32|64|128>(S2) -> Decimal256(S)`

 Rules for scale:

@ -104,4 +107,8 @@ SELECT toDecimal32(1, 8) < 100
 DB::Exception: Can't compare.
 ```

+**See also**
+-   [isDecimalOverflow](../../sql-reference/functions/other-functions.md#is-decimal-overflow)
+-   [countDigits](../../sql-reference/functions/other-functions.md#count-digits)
+
 [Original article](https://clickhouse.tech/docs/en/data_types/decimal/) <!--hide-->
--- a/docs/en/sql-reference/data-types/int-uint.md
+++ b/docs/en/sql-reference/data-types/int-uint.md
@ -1,9 +1,9 @@
 ---
 toc_priority: 40
-toc_title: UInt8, UInt16, UInt32, UInt64, Int8, Int16, Int32, Int64
+toc_title: UInt8, UInt16, UInt32, UInt64, UInt256, Int8, Int16, Int32, Int64, Int128, Int256
 ---

-# UInt8, UInt16, UInt32, UInt64, Int8, Int16, Int32, Int64 {#uint8-uint16-uint32-uint64-int8-int16-int32-int64}
+# UInt8, UInt16, UInt32, UInt64, UInt256, Int8, Int16, Int32, Int64, Int128, Int256 {#uint8-uint16-uint32-uint64-uint256-int8-int16-int32-int64-int128-int256}

 Fixed-length integers, with or without a sign.

@ -13,6 +13,8 @@ Fixed-length integers, with or without a sign.
 -   Int16 - \[-32768 : 32767\]
 -   Int32 - \[-2147483648 : 2147483647\]
 -   Int64 - \[-9223372036854775808 : 9223372036854775807\]
+-   Int128 - \[-170141183460469231731687303715884105728 : 170141183460469231731687303715884105727\]
+-   Int256 - \[-57896044618658097711785492504343953926634992332820282019728792003956564819968 : 57896044618658097711785492504343953926634992332820282019728792003956564819967\]

 ## Uint Ranges {#uint-ranges}

@ -20,5 +22,8 @@ Fixed-length integers, with or without a sign.
 -   UInt16 - \[0 : 65535\]
 -   UInt32 - \[0 : 4294967295\]
 -   UInt64 - \[0 : 18446744073709551615\]
+-   UInt256 - \[0 : 115792089237316195423570985008687907853269984665640564039457584007913129639935\]
+
+UInt128 is not supported yet.

 [Original article](https://clickhouse.tech/docs/en/data_types/int_uint/) <!--hide-->
--- a/docs/en/sql-reference/functions/date-time-functions.md
+++ b/docs/en/sql-reference/functions/date-time-functions.md
@ -357,7 +357,7 @@ SELECT date_trunc('hour', now())

 ## now {#now}

-Accepts zero arguments and returns the current time at one of the moments of request execution.
+Accepts zero or one arguments(timezone) and returns the current time at one of the moments of request execution, or current time of specific timezone at one of the moments of request execution if `timezone` argument provided.
 This function returns a constant, even if the request took a long time to complete.

 ## today {#today}
--- a/docs/en/sql-reference/functions/machine-learning-functions.md
+++ b/docs/en/sql-reference/functions/machine-learning-functions.md
@ -16,3 +16,82 @@ The [stochasticLinearRegression](../../sql-reference/aggregate-functions/referen
 ## stochasticLogisticRegression {#stochastic-logistic-regression}

 The [stochasticLogisticRegression](../../sql-reference/aggregate-functions/reference/stochasticlogisticregression.md#agg_functions-stochasticlogisticregression) aggregate function implements stochastic gradient descent method for binary classification problem. Uses `evalMLMethod` to predict on new data.
+
+## bayesAB {#bayesab}
+
+Compares test groups (variants) and calculates for each group the probability to be the best one. The first group is used as a control group.
+
+**Syntax** 
+
+``` sql
+bayesAB(distribution_name, higher_is_better, variant_names, x, y)
+```
+
+**Parameters** 
+
+-   `distribution_name` — Name of the probability distribution. [String](../../sql-reference/data-types/string.md). Possible values:
+
+    -   `beta` for [Beta distribution](https://en.wikipedia.org/wiki/Beta_distribution)
+    -   `gamma` for [Gamma distribution](https://en.wikipedia.org/wiki/Gamma_distribution)
+
+-   `higher_is_better` — Boolean flag. [Boolean](../../sql-reference/data-types/boolean.md). Possible values:
+
+    -    `0` - lower values are considered to be better than higher
+    -    `1` - higher values are considered to be better than lower
+
+-   `variant_names` - Variant names. [Array](../../sql-reference/data-types/array.md)([String](../../sql-reference/data-types/string.md)).
+
+-   `x` - Numbers of tests for the corresponding variants. [Array](../../sql-reference/data-types/array.md)([Float64](../../sql-reference/data-types/float.md)).
+
+-   `y` - Numbers of successful tests for the corresponding variants. [Array](../../sql-reference/data-types/array.md)([Float64](../../sql-reference/data-types/float.md)).
+
+!!! note "Note"
+    All three arrays must have the same size. All `x` and `y` values must be non-negative constant numbers. `y` cannot be larger than `x`.
+
+**Returned values**
+
+For each variant the function calculates:
+-   `beats_control` - long-term probability to out-perform the first (control) variant
+-   `to_be_best` - long-term probability to out-perform all other variants
+
+Type: JSON.
+
+**Example**
+
+Query:
+
+``` sql
+SELECT bayesAB('beta', 1, ['Control', 'A', 'B'], [3000., 3000., 3000.], [100., 90., 110.]) FORMAT PrettySpace;
+```
+
+Result:
+
+``` text
+{
+   "data":[
+      {
+         "variant_name":"Control",
+         "x":3000,
+         "y":100,
+         "beats_control":0,
+         "to_be_best":0.22619
+      },
+      {
+         "variant_name":"A",
+         "x":3000,
+         "y":90,
+         "beats_control":0.23469,
+         "to_be_best":0.04671
+      },
+      {
+         "variant_name":"B",
+         "x":3000,
+         "y":110,
+         "beats_control":0.7580899999999999,
+         "to_be_best":0.7271
+      }
+   ]
+}
+```
+
+[Original article](https://clickhouse.tech/docs/en/query_language/functions/machine-learning-functions/) <!--hide-->
--- a/docs/en/sql-reference/functions/other-functions.md
+++ b/docs/en/sql-reference/functions/other-functions.md
@ -1491,4 +1491,115 @@ Result:

 ```

+## getSetting {#getSetting}
+
+Returns the current value of a [custom setting](../../operations/settings/index.md#custom_settings).
+
+**Syntax** 
+
+```sql
+getSetting('custom_setting');    
+```
+
+**Parameter** 
+
+-   `custom_setting` — The setting name. [String](../../sql-reference/data-types/string.md).
+
+**Returned value**
+
+-   The setting current value.
+
+**Example**
+
+```sql
+SET custom_a = 123;
+SELECT getSetting('custom_a');    
+```
+
+**Result**
+
+```
+123
+```
+
+**See Also** 
+
+-   [Custom Settings](../../operations/settings/index.md#custom_settings)
+
+## isDecimalOverflow {#is-decimal-overflow}
+
+Checks whether the [Decimal](../../sql-reference/data-types/decimal.md#decimalp-s-decimal32s-decimal64s-decimal128s) value is out of its (or specified) precision.
+
+**Syntax**
+
+``` sql
+isDecimalOverflow(d, [p])
+```
+
+**Parameters** 
+
+-   `d` — value. [Decimal](../../sql-reference/data-types/decimal.md#decimalp-s-decimal32s-decimal64s-decimal128s).
+-   `p` — precision. Optional. If omitted, the initial presicion of the first argument is used. Using of this paratemer could be helpful for data extraction to another DBMS or file. [UInt8](../../sql-reference/data-types/int-uint.md#uint-ranges). 
+
+**Returned values**
+
+-   `1` — Decimal value has more digits then it's precision allow,
+-   `0` — Decimal value satisfies the specified precision.
+
+**Example**
+
+Query:
+
+``` sql
+SELECT isDecimalOverflow(toDecimal32(1000000000, 0), 9),
+       isDecimalOverflow(toDecimal32(1000000000, 0)),
+       isDecimalOverflow(toDecimal32(-1000000000, 0), 9),
+       isDecimalOverflow(toDecimal32(-1000000000, 0));
+```
+
+Result:
+
+``` text
+1	1	1	1
+```
+
+## countDigits {#count-digits}
+
+Returns number of decimal digits you need to represent the value.
+
+**Syntax**
+
+``` sql
+countDigits(x)
+```
+
+**Parameters** 
+
+-   `x` — [Int](../../sql-reference/data-types/int-uint.md#uint8-uint16-uint32-uint64-int8-int16-int32-int64) or [Decimal](../../sql-reference/data-types/decimal.md#decimalp-s-decimal32s-decimal64s-decimal128s) value.
+
+**Returned value**
+
+Number of digits.
+
+Type: [UInt8](../../sql-reference/data-types/int-uint.md#uint-ranges).
+
+ !!! note "Note"
+    For `Decimal` values takes into account their scales: calculates result over underlying integer type which is `(value * scale)`. For example: `countDigits(42) = 2`, `countDigits(42.000) = 5`, `countDigits(0.04200) = 4`. I.e. you may check decimal overflow for `Decimal64` with `countDecimal(x) > 18`. It's a slow variant of [isDecimalOverflow](#is-decimal-overflow).
+
+**Example**
+
+Query:
+
+``` sql
+SELECT countDigits(toDecimal32(1, 9)), countDigits(toDecimal32(-1, 9)),
+       countDigits(toDecimal64(1, 18)), countDigits(toDecimal64(-1, 18)),
+       countDigits(toDecimal128(1, 38)), countDigits(toDecimal128(-1, 38));
+```
+
+Result:
+
+``` text
+10	10	19	19	39	39
+```
+
 [Original article](https://clickhouse.tech/docs/en/query_language/functions/other_functions/) <!--hide-->
--- a/docs/en/sql-reference/functions/string-functions.md
+++ b/docs/en/sql-reference/functions/string-functions.md
@ -487,4 +487,75 @@ Returns the CRC64 checksum of a string, using CRC-64-ECMA polynomial.

 The result type is UInt64.

+## normalizeQuery {#normalized-query}
+
+Replaces literals, sequences of literals and complex aliases with placeholders.
+
+**Syntax** 
+``` sql
+normalizeQuery(x)
+```
+
+**Parameters** 
+
+-   `x` — Sequence of characters. [String](../../sql-reference/data-types/string.md).
+
+**Returned value**
+
+-   Sequence of characters with placeholders.
+
+Type: [String](../../sql-reference/data-types/string.md).
+
+**Example**
+
+Query:
+
+``` sql
+SELECT normalizeQuery('[1, 2, 3, x]') AS query;
+```
+
+Result:
+
+``` text
+┌─query────┐
+│ [?.., x] │
+└──────────┘
+```
+
+## normalizedQueryHash {#normalized-query-hash}
+
+Returns identical 64bit hash values without the values of literals for similar queries. It helps to analyze query log.
+
+**Syntax** 
+
+``` sql
+normalizedQueryHash(x)
+```
+
+**Parameters** 
+
+-   `x` — Sequence of characters. [String](../../sql-reference/data-types/string.md).
+
+**Returned value**
+
+-   Hash value.
+
+Type: [UInt64](../../sql-reference/data-types/int-uint.md#uint-ranges).
+
+**Example**
+
+Query:
+
+``` sql
+SELECT normalizedQueryHash('SELECT 1 AS `xyz`') != normalizedQueryHash('SELECT 1 AS `abc`') AS res;
+```
+
+Result:
+
+``` text
+┌─res─┐
+│   1 │
+└─────┘
+```
+
 [Original article](https://clickhouse.tech/docs/en/query_language/functions/string_functions/) <!--hide-->
--- a/docs/en/sql-reference/functions/string-search-functions.md
+++ b/docs/en/sql-reference/functions/string-search-functions.md
@ -360,6 +360,89 @@ Extracts a fragment of a string using a regular expression. If ‘haystack’ do

 Extracts all the fragments of a string using a regular expression. If ‘haystack’ doesn’t match the ‘pattern’ regex, an empty string is returned. Returns an array of strings consisting of all matches to the regex. In general, the behavior is the same as the ‘extract’ function (it takes the first subpattern, or the entire expression if there isn’t a subpattern).

+## extractAllGroupsHorizontal {#extractallgroups-horizontal}
+
+Matches all groups of the `haystack` string using the `pattern` regular expression. Returns an array of arrays, where the first array includes all fragments matching the first group, the second array - matching the second group, etc.  
+
+!!! note "Note"
+    `extractAllGroupsHorizontal` function is slower than [extractAllGroupsVertical](#extractallgroups-vertical).
+
+**Syntax** 
+
+``` sql
+extractAllGroupsHorizontal(haystack, pattern)
+```
+
+**Parameters** 
+
+-   `haystack` — Input string. Type: [String](../../sql-reference/data-types/string.md).
+-   `pattern` — Regular expression with [re2 syntax](https://github.com/google/re2/wiki/Syntax). Must contain groups, each group enclosed in parentheses. If `pattern` contains no groups, an exception is thrown. Type: [String](../../sql-reference/data-types/string.md). 
+
+**Returned value**
+
+-   Type: [Array](../../sql-reference/data-types/array.md).
+
+If `haystack` doesn’t match the `pattern` regex, an array of empty arrays is returned. 
+
+**Example**
+
+Query:
+
+``` sql
+SELECT extractAllGroupsHorizontal('abc=111, def=222, ghi=333', '("[^"]+"|\\w+)=("[^"]+"|\\w+)')
+```
+
+Result:
+
+``` text
+┌─extractAllGroupsHorizontal('abc=111, def=222, ghi=333', '("[^"]+"|\\w+)=("[^"]+"|\\w+)')─┐
+│ [['abc','def','ghi'],['111','222','333']]                                                │
+└──────────────────────────────────────────────────────────────────────────────────────────┘
+```
+
+**See also**
+-   [extractAllGroupsVertical](#extractallgroups-vertical)
+
+## extractAllGroupsVertical {#extractallgroups-vertical}
+
+Matches all groups of the `haystack` string using the `pattern` regular expression. Returns an array of arrays, where each array includes matching fragments from every group. Fragments are grouped in order of appearance in the `haystack`.
+
+**Syntax** 
+
+``` sql
+extractAllGroupsVertical(haystack, pattern)
+```
+
+**Parameters** 
+
+-   `haystack` — Input string. Type: [String](../../sql-reference/data-types/string.md).
+-   `pattern` — Regular expression with [re2 syntax](https://github.com/google/re2/wiki/Syntax). Must contain groups, each group enclosed in parentheses. If `pattern` contains no groups, an exception is thrown. Type: [String](../../sql-reference/data-types/string.md).
+
+**Returned value**
+
+-   Type: [Array](../../sql-reference/data-types/array.md).
+
+If `haystack` doesn’t match the `pattern` regex, an empty array is returned. 
+
+**Example**
+
+Query:
+
+``` sql
+SELECT extractAllGroupsVertical('abc=111, def=222, ghi=333', '("[^"]+"|\\w+)=("[^"]+"|\\w+)')
+```
+
+Result:
+
+``` text
+┌─extractAllGroupsVertical('abc=111, def=222, ghi=333', '("[^"]+"|\\w+)=("[^"]+"|\\w+)')─┐
+│ [['abc','111'],['def','222'],['ghi','333']]                                            │
+└────────────────────────────────────────────────────────────────────────────────────────┘
+```
+
+**See also**
+-   [extractAllGroupsHorizontal](#extractallgroups-horizontal)
+
 ## like(haystack, pattern), haystack LIKE pattern operator {#function-like}

 Checks whether a string matches a simple regular expression.
--- a/docs/en/sql-reference/functions/type-conversion-functions.md
+++ b/docs/en/sql-reference/functions/type-conversion-functions.md
@ -11,7 +11,8 @@ When you convert a value from one to another data type, you should remember that

 ClickHouse has the [same behavior as C++ programs](https://en.cppreference.com/w/cpp/language/implicit_conversion).

-## toInt(8\|16\|32\|64) {#toint8163264}
+## toInt(8\|16\|32\|64\|128\|256) {#toint8163264128256}
+

 Converts an input value to the [Int](../../sql-reference/data-types/int-uint.md) data type. This function family includes:

@ -19,6 +20,8 @@ Converts an input value to the [Int](../../sql-reference/data-types/int-uint.md)
 -   `toInt16(expr)` — Results in the `Int16` data type.
 -   `toInt32(expr)` — Results in the `Int32` data type.
 -   `toInt64(expr)` — Results in the `Int64` data type.
+-   `toInt128(expr)` — Results in the `Int128` data type.
+-   `toInt256(expr)` — Results in the `Int256` data type.

 **Parameters**

@ -26,7 +29,7 @@ Converts an input value to the [Int](../../sql-reference/data-types/int-uint.md)

 **Returned value**

-Integer value in the `Int8`, `Int16`, `Int32`, or `Int64` data type.
+Integer value in the `Int8`, `Int16`, `Int32`, `Int64`, `Int128` or `Int256` data type.

 Functions use [rounding towards zero](https://en.wikipedia.org/wiki/Rounding#Rounding_towards_zero), meaning they truncate fractional digits of numbers.

@ -44,9 +47,9 @@ SELECT toInt64(nan), toInt32(32), toInt16('16'), toInt8(8.8)
 └──────────────────────┴─────────────┴───────────────┴─────────────┘
 ```

-## toInt(8\|16\|32\|64)OrZero {#toint8163264orzero}
+## toInt(8\|16\|32\|64\|128\|256)OrZero {#toint8163264orzero}

-It takes an argument of type String and tries to parse it into Int (8 \| 16 \| 32 \| 64). If failed, returns 0.
+It takes an argument of type String and tries to parse it into Int (8 \| 16 \| 32 \| 64 \| 128 \| 256). If failed, returns 0.

 **Example**

@ -60,9 +63,9 @@ select toInt64OrZero('123123'), toInt8OrZero('123qwe123')
 └─────────────────────────┴───────────────────────────┘
 ```

-## toInt(8\|16\|32\|64)OrNull {#toint8163264ornull}
+## toInt(8\|16\|32\|64\|128\|256)OrNull {#toint8163264128256ornull}

-It takes an argument of type String and tries to parse it into Int (8 \| 16 \| 32 \| 64). If failed, returns NULL.
+It takes an argument of type String and tries to parse it into Int (8 \| 16 \| 32 \| 64 \| 128 \| 256). If failed, returns NULL.

 **Example**

@ -76,7 +79,7 @@ select toInt64OrNull('123123'), toInt8OrNull('123qwe123')
 └─────────────────────────┴───────────────────────────┘
 ```

-## toUInt(8\|16\|32\|64) {#touint8163264}
+## toUInt(8\|16\|32\|64\|256) {#touint8163264256}

 Converts an input value to the [UInt](../../sql-reference/data-types/int-uint.md) data type. This function family includes:

@ -84,6 +87,7 @@ Converts an input value to the [UInt](../../sql-reference/data-types/int-uint.md
 -   `toUInt16(expr)` — Results in the `UInt16` data type.
 -   `toUInt32(expr)` — Results in the `UInt32` data type.
 -   `toUInt64(expr)` — Results in the `UInt64` data type.
+-   `toUInt256(expr)` — Results in the `UInt256` data type.

 **Parameters**

@ -91,7 +95,7 @@ Converts an input value to the [UInt](../../sql-reference/data-types/int-uint.md

 **Returned value**

-Integer value in the `UInt8`, `UInt16`, `UInt32`, or `UInt64` data type.
+Integer value in the `UInt8`, `UInt16`, `UInt32`, `UInt64` or `UInt256` data type.

 Functions use [rounding towards zero](https://en.wikipedia.org/wiki/Rounding#Rounding_towards_zero), meaning they truncate fractional digits of numbers.

@ -109,9 +113,9 @@ SELECT toUInt64(nan), toUInt32(-32), toUInt16('16'), toUInt8(8.8)
 └─────────────────────┴───────────────┴────────────────┴──────────────┘
 ```

-## toUInt(8\|16\|32\|64)OrZero {#touint8163264orzero}
+## toUInt(8\|16\|32\|64\|256)OrZero {#touint8163264256orzero}

-## toUInt(8\|16\|32\|64)OrNull {#touint8163264ornull}
+## toUInt(8\|16\|32\|64\|256)OrNull {#touint8163264256ornull}

 ## toFloat(32\|64) {#tofloat3264}

@ -131,21 +135,23 @@ SELECT toUInt64(nan), toUInt32(-32), toUInt16('16'), toUInt8(8.8)

 ## toDateTimeOrNull {#todatetimeornull}

-## toDecimal(32\|64\|128) {#todecimal3264128}
+## toDecimal(32\|64\|128\|256) {#todecimal3264128256}

 Converts `value` to the [Decimal](../../sql-reference/data-types/decimal.md) data type with precision of `S`. The `value` can be a number or a string. The `S` (scale) parameter specifies the number of decimal places.

 -   `toDecimal32(value, S)`
 -   `toDecimal64(value, S)`
 -   `toDecimal128(value, S)`
+-   `toDecimal256(value, S)`

-## toDecimal(32\|64\|128)OrNull {#todecimal3264128ornull}
+## toDecimal(32\|64\|128\|256)OrNull {#todecimal3264128256ornull}

 Converts an input string to a [Nullable(Decimal(P,S))](../../sql-reference/data-types/decimal.md) data type value. This family of functions include:

 -   `toDecimal32OrNull(expr, S)` — Results in `Nullable(Decimal32(S))` data type.
 -   `toDecimal64OrNull(expr, S)` — Results in `Nullable(Decimal64(S))` data type.
 -   `toDecimal128OrNull(expr, S)` — Results in `Nullable(Decimal128(S))` data type.
+-   `toDecimal256OrNull(expr, S)` — Results in `Nullable(Decimal256(S))` data type.

 These functions should be used instead of `toDecimal*()` functions, if you prefer to get a `NULL` value instead of an exception in the event of an input value parsing error.

@ -183,13 +189,16 @@ SELECT toDecimal32OrNull(toString(-1.111), 2) AS val, toTypeName(val)
 └──────┴────────────────────────────────────────────────────┘
 ```

-## toDecimal(32\|64\|128)OrZero {#todecimal3264128orzero}
+
+## toDecimal(32\|64\|128\'|256)OrZero {#todecimal3264128256orzero}
+

 Converts an input value to the [Decimal(P,S)](../../sql-reference/data-types/decimal.md) data type. This family of functions include:

 -   `toDecimal32OrZero( expr, S)` — Results in `Decimal32(S)` data type.
 -   `toDecimal64OrZero( expr, S)` — Results in `Decimal64(S)` data type.
 -   `toDecimal128OrZero( expr, S)` — Results in `Decimal128(S)` data type.
+-   `toDecimal256OrZero( expr, S)` — Results in `Decimal256(S)` data type.

 These functions should be used instead of `toDecimal*()` functions, if you prefer to get a `0` value instead of an exception in the event of an input value parsing error.

@ -729,4 +738,45 @@ SELECT fromUnixTimestamp64Milli(i64, 'UTC')
 └──────────────────────────────────────┘
 ```

+## formatRow {#formatrow}
+
+Converts arbitrary expressions into a string via given format. 
+
+**Syntax** 
+
+``` sql
+formatRow(format, x, y, ...)
+```
+
+**Parameters**
+
+-   `format` — Text format. For example, [CSV](../../interfaces/formats.md#csv), [TSV](../../interfaces/formats.md#tabseparated).
+-   `x`,`y`, ... — Expressions.
+
+**Returned value**
+
+-   A formatted string (for text formats it's usually terminated with the new line character).
+
+**Example**
+
+Query:
+
+``` sql
+SELECT formatRow('CSV', number, 'good')
+FROM numbers(3)
+```
+
+Result:
+
+``` text
+┌─formatRow('CSV', number, 'good')─┐
+│ 0,"good"
+                         │
+│ 1,"good"
+                         │
+│ 2,"good"
+                         │
+└──────────────────────────────────┘
+```
+
 [Original article](https://clickhouse.tech/docs/en/query_language/functions/type_conversion_functions/) <!--hide-->
--- a/docs/es/development/build.md
+++ b/docs/es/development/build.md
@ -102,7 +102,7 @@ Ejemplo de OpenSUSE Tumbleweed:
 Ejemplo de Fedora Rawhide:

    sudo yum update
-    yum --nogpg install git cmake make gcc-c++ python2
+    yum --nogpg install git cmake make gcc-c++ python3
    git clone --recursive https://github.com/ClickHouse/ClickHouse.git
    mkdir build && cd build
    cmake ../ClickHouse
--- a/docs/es/index.md
+++ b/docs/es/index.md
@ -1,15 +1,15 @@
 ---
-machine_translated: true
-machine_translated_rev: 72537a2d527c63c07aa5d2361a8829f3895cf2bd
+machine_translated: false
+machine_translated_rev: 
 toc_priority: 0
-toc_title: "Descripci\xF3n"
+toc_title: "Descripción"
 ---

 # ¿Qué es ClickHouse? {#what-is-clickhouse}

-ClickHouse es un sistema de gestión de bases de datos orientado a columnas (DBMS) para el procesamiento analítico en línea de consultas (OLAP).
+ClickHouse es un sistema de gestión de bases de datos (DBMS), orientado a columnas, para el procesamiento analítico de consultas en línea (OLAP).

-En un “normal” DBMS orientado a filas, los datos se almacenan en este orden:
+En un DBMS “normal”, orientado a filas, los datos se almacenan en este orden:

 | Fila | Argumento   | JavaEnable | Titular                   | GoodEvent | EventTime           |
 |------|-------------|------------|---------------------------|-----------|---------------------|
@ -36,7 +36,7 @@ Estos ejemplos solo muestran el orden en el que se organizan los datos. Los valo

 Ejemplos de un DBMS orientado a columnas: Vertica, Paraccel (Actian Matrix y Amazon Redshift), Sybase IQ, Exasol, Infobright, InfiniDB, MonetDB (VectorWise y Actian Vector), LucidDB, SAP HANA, Google Dremel, Google PowerDrill, Druid y kdb+.

-Different orders for storing data are better suited to different scenarios. The data access scenario refers to what queries are made, how often, and in what proportion; how much data is read for each type of query – rows, columns, and bytes; the relationship between reading and updating data; the working size of the data and how locally it is used; whether transactions are used, and how isolated they are; requirements for data replication and logical integrity; requirements for latency and throughput for each type of query, and so on.
+Los diferentes modos de ordenar los datos al guardarlos se adecúan mejor a diferentes escenarios. El escenario de acceso a los datos se refiere a qué consultas se hacen, con qué frecuencia y en qué proporción; cuántos datos se leen para cada tipo de consulta - filas, columnas y bytes; la relación entre lectura y actualización de datos; el tamaño de trabajo de los datos y qué tan localmente son usados; si se usan transacciones y qué tan aisladas están;requerimientos de replicación de los datos y de integridad lógica, requerimientos de latencia y caudal (throughput) para cada tipo de consulta, y cosas por el estilo.

 Cuanto mayor sea la carga en el sistema, más importante es personalizar el sistema configurado para que coincida con los requisitos del escenario de uso, y más fino será esta personalización. No existe un sistema que sea igualmente adecuado para escenarios significativamente diferentes. Si un sistema es adaptable a un amplio conjunto de escenarios, bajo una carga alta, el sistema manejará todos los escenarios igualmente mal, o funcionará bien para solo uno o algunos de los escenarios posibles.

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