Merge branch 'master' into database_atomic_improvements

2024-11-22 07:31:57 +00:00 · 2020-07-17 00:43:59 +03:00 · 2020-07-17 00:43:59 +03:00 · a612080df1
commit a612080df1
parent ebf98ba006 fde8c87a1f
238 changed files with 7784 additions and 493 deletions
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@ -287,7 +287,7 @@ endif ()

 include(cmake/dbms_glob_sources.cmake)

-if (OS_LINUX)
+if (OS_LINUX OR OS_ANDROID)
    include(cmake/linux/default_libs.cmake)
 elseif (OS_DARWIN)
    include(cmake/darwin/default_libs.cmake)
--- a/README.md
+++ b/README.md
@ -16,5 +16,4 @@ ClickHouse is an open-source column-oriented database management system that all

 ## Upcoming Events		

-* [ClickHouse virtual office hours](https://www.eventbrite.com/e/clickhouse-july-virtual-meetup-tickets-111199787558) on July 15, 2020.
 * [ClickHouse at ByteDance (in Chinese)](https://mp.weixin.qq.com/s/Em-HjPylO8D7WPui4RREAQ) on July 17, 2020.
--- a/base/common/getThreadId.cpp
+++ b/base/common/getThreadId.cpp
@ -1,6 +1,9 @@
 #include <common/getThreadId.h>

-#if defined(OS_LINUX)
+#if defined(OS_ANDROID)
+    #include <sys/types.h>
+    #include <unistd.h>
+#elif defined(OS_LINUX)
    #include <unistd.h>
    #include <syscall.h>
 #elif defined(OS_FREEBSD)
@ -16,7 +19,9 @@ uint64_t getThreadId()
 {
    if (!current_tid)
    {
-#if defined(OS_LINUX)
+#if defined(OS_ANDROID)
+        current_tid = gettid();
+#elif defined(OS_LINUX)
        current_tid = syscall(SYS_gettid); /// This call is always successful. - man gettid
 #elif defined(OS_FREEBSD)
        current_tid = pthread_getthreadid_np();
--- a/base/daemon/BaseDaemon.cpp
+++ b/base/daemon/BaseDaemon.cpp
@ -9,7 +9,6 @@
 #include <string.h>
 #include <signal.h>
 #include <cxxabi.h>
-#include <execinfo.h>
 #include <unistd.h>

 #include <typeinfo>
--- a/cmake/Modules/FindOpenLDAP.cmake
+++ b/cmake/Modules/FindOpenLDAP.cmake
@ -7,7 +7,7 @@
 #
 # Sets values of:
 #   OPENLDAP_FOUND              - TRUE if found
-#   OPENLDAP_INCLUDE_DIR        - path to the include directory
+#   OPENLDAP_INCLUDE_DIRS       - paths to the include directories
 #   OPENLDAP_LIBRARIES          - paths to the libldap and liblber libraries
 #   OPENLDAP_LDAP_LIBRARY       - paths to the libldap library
 #   OPENLDAP_LBER_LIBRARY       - paths to the liblber library
@ -28,11 +28,11 @@ if(OPENLDAP_USE_REENTRANT_LIBS)
 endif()

 if(OPENLDAP_ROOT_DIR)
-    find_path(OPENLDAP_INCLUDE_DIR NAMES "ldap.h" "lber.h" PATHS "${OPENLDAP_ROOT_DIR}" PATH_SUFFIXES "include" NO_DEFAULT_PATH)
+    find_path(OPENLDAP_INCLUDE_DIRS NAMES "ldap.h" "lber.h" PATHS "${OPENLDAP_ROOT_DIR}" PATH_SUFFIXES "include" NO_DEFAULT_PATH)
    find_library(OPENLDAP_LDAP_LIBRARY NAMES "ldap${_r_suffix}" PATHS "${OPENLDAP_ROOT_DIR}" PATH_SUFFIXES "lib" NO_DEFAULT_PATH)
    find_library(OPENLDAP_LBER_LIBRARY NAMES "lber" PATHS "${OPENLDAP_ROOT_DIR}" PATH_SUFFIXES "lib" NO_DEFAULT_PATH)
 else()
-    find_path(OPENLDAP_INCLUDE_DIR NAMES "ldap.h" "lber.h")
+    find_path(OPENLDAP_INCLUDE_DIRS NAMES "ldap.h" "lber.h")
    find_library(OPENLDAP_LDAP_LIBRARY NAMES "ldap${_r_suffix}")
    find_library(OPENLDAP_LBER_LIBRARY NAMES "lber")
 endif()
@ -44,10 +44,10 @@ set(OPENLDAP_LIBRARIES ${OPENLDAP_LDAP_LIBRARY} ${OPENLDAP_LBER_LIBRARY})
 include(FindPackageHandleStandardArgs)
 find_package_handle_standard_args(
    OpenLDAP DEFAULT_MSG
-    OPENLDAP_INCLUDE_DIR OPENLDAP_LDAP_LIBRARY OPENLDAP_LBER_LIBRARY
+    OPENLDAP_INCLUDE_DIRS OPENLDAP_LDAP_LIBRARY OPENLDAP_LBER_LIBRARY
 )

-mark_as_advanced(OPENLDAP_INCLUDE_DIR OPENLDAP_LIBRARIES OPENLDAP_LDAP_LIBRARY OPENLDAP_LBER_LIBRARY)
+mark_as_advanced(OPENLDAP_INCLUDE_DIRS OPENLDAP_LIBRARIES OPENLDAP_LDAP_LIBRARY OPENLDAP_LBER_LIBRARY)

 if(OPENLDAP_USE_STATIC_LIBS)
    set(CMAKE_FIND_LIBRARY_SUFFIXES ${_orig_CMAKE_FIND_LIBRARY_SUFFIXES})
--- a/cmake/find/amqpcpp.cmake
+++ b/cmake/find/amqpcpp.cmake
@ -1,4 +1,5 @@
-SET(ENABLE_AMQPCPP ${ENABLE_LIBRARIES})
+option(ENABLE_AMQPCPP "Enalbe AMQP-CPP" ${ENABLE_LIBRARIES})
+
 if (NOT EXISTS "${ClickHouse_SOURCE_DIR}/contrib/AMQP-CPP/CMakeLists.txt")
    message (WARNING "submodule contrib/AMQP-CPP is missing. to fix try run: \n git submodule update --init --recursive")
    set (ENABLE_AMQPCPP 0)
--- a/cmake/find/gtest.cmake
+++ b/cmake/find/gtest.cmake
@ -1,3 +1,7 @@
+option (ENABLE_GTEST_LIBRARY "Enable gtest library" ${ENABLE_LIBRARIES})
+
+if (ENABLE_GTEST_LIBRARY)
+
 option (USE_INTERNAL_GTEST_LIBRARY "Set to FALSE to use system Google Test instead of bundled" ${NOT_UNBUNDLED})

 if (NOT EXISTS "${ClickHouse_SOURCE_DIR}/contrib/googletest/googletest/CMakeLists.txt")
@ -28,4 +32,6 @@ if((GTEST_INCLUDE_DIRS AND GTEST_BOTH_LIBRARIES) OR GTEST_SRC_DIR)
    set(USE_GTEST 1)
 endif()

+endif()
+
 message (STATUS "Using gtest=${USE_GTEST}: ${GTEST_INCLUDE_DIRS} : ${GTEST_BOTH_LIBRARIES} : ${GTEST_SRC_DIR}")
--- a/cmake/find/ldap.cmake
+++ b/cmake/find/ldap.cmake
@ -16,11 +16,16 @@ if (ENABLE_LDAP)
    set (OPENLDAP_USE_REENTRANT_LIBS 1)

    if (NOT USE_INTERNAL_LDAP_LIBRARY)
-        if (APPLE AND NOT OPENLDAP_ROOT_DIR)
-            set (OPENLDAP_ROOT_DIR "/usr/local/opt/openldap")
-        endif ()
+        if (OPENLDAP_USE_STATIC_LIBS)
+            message (WARNING "Unable to use external static OpenLDAP libraries, falling back to the bundled version.")
+            set (USE_INTERNAL_LDAP_LIBRARY 1)
+        else ()
+            if (APPLE AND NOT OPENLDAP_ROOT_DIR)
+                set (OPENLDAP_ROOT_DIR "/usr/local/opt/openldap")
+            endif ()

-        find_package (OpenLDAP)
+            find_package (OpenLDAP)
+        endif ()
    endif ()

    if (NOT OPENLDAP_FOUND AND NOT MISSING_INTERNAL_LDAP_LIBRARY)
@ -54,7 +59,10 @@ if (ENABLE_LDAP)
        else ()
            set (USE_INTERNAL_LDAP_LIBRARY 1)
            set (OPENLDAP_ROOT_DIR "${ClickHouse_SOURCE_DIR}/contrib/openldap")
-            set (OPENLDAP_INCLUDE_DIR "${ClickHouse_SOURCE_DIR}/contrib/openldap/include")
+            set (OPENLDAP_INCLUDE_DIRS
+                "${ClickHouse_SOURCE_DIR}/contrib/openldap-cmake/${_system_name}_${_system_processor}/include"
+                "${ClickHouse_SOURCE_DIR}/contrib/openldap/include"
+            )
            # Below, 'ldap'/'ldap_r' and 'lber' will be resolved to
            # the targets defined in contrib/openldap-cmake/CMakeLists.txt
            if (OPENLDAP_USE_REENTRANT_LIBS)
@ -73,4 +81,4 @@ if (ENABLE_LDAP)
    endif ()
 endif ()

-message (STATUS "Using ldap=${USE_LDAP}: ${OPENLDAP_INCLUDE_DIR} : ${OPENLDAP_LIBRARIES}")
+message (STATUS "Using ldap=${USE_LDAP}: ${OPENLDAP_INCLUDE_DIRS} : ${OPENLDAP_LIBRARIES}")
--- a/cmake/find/libgsasl.cmake
+++ b/cmake/find/libgsasl.cmake
@ -1,3 +1,7 @@
+option(ENABLE_GSASL_LIBRARY "Enable gsasl library" ${ENABLE_LIBRARIES})
+
+if (ENABLE_GSASL_LIBRARY)
+
 option (USE_INTERNAL_LIBGSASL_LIBRARY "Set to FALSE to use system libgsasl library instead of bundled" ${NOT_UNBUNDLED})

 if (NOT EXISTS "${ClickHouse_SOURCE_DIR}/contrib/libgsasl/src/gsasl.h")
@ -24,4 +28,6 @@ if(LIBGSASL_LIBRARY AND LIBGSASL_INCLUDE_DIR)
    set (USE_LIBGSASL 1)
 endif()

+endif()
+
 message (STATUS "Using libgsasl=${USE_LIBGSASL}: ${LIBGSASL_INCLUDE_DIR} : ${LIBGSASL_LIBRARY}")
--- a/cmake/find/msgpack.cmake
+++ b/cmake/find/msgpack.cmake
@ -1,3 +1,7 @@
+option (ENABLE_MSGPACK "Enable msgpack library" ${ENABLE_LIBRARIES})
+
+if (ENABLE_MSGPACK)
+
 option (USE_INTERNAL_MSGPACK_LIBRARY "Set to FALSE to use system msgpack library instead of bundled" ${NOT_UNBUNDLED})

 if (USE_INTERNAL_MSGPACK_LIBRARY)
@ -14,4 +18,10 @@ else()
    find_path(MSGPACK_INCLUDE_DIR NAMES msgpack.hpp PATHS ${MSGPACK_INCLUDE_PATHS})
 endif()

-message(STATUS "Using msgpack: ${MSGPACK_INCLUDE_DIR}")
+if (MSGPACK_INCLUDE_DIR)
+    set(USE_MSGPACK 1)
+endif()
+
+endif()
+
+message(STATUS "Using msgpack=${USE_MSGPACK}: ${MSGPACK_INCLUDE_DIR}")
--- a/cmake/linux/default_libs.cmake
+++ b/cmake/linux/default_libs.cmake
@ -11,7 +11,12 @@ else ()
    set (BUILTINS_LIBRARY "-lgcc")
 endif ()

+if (OS_ANDROID)
+# pthread and rt are included in libc
+set (DEFAULT_LIBS "${DEFAULT_LIBS} ${BUILTINS_LIBRARY} ${COVERAGE_OPTION} -lc -lm -ldl")
+else ()
 set (DEFAULT_LIBS "${DEFAULT_LIBS} ${BUILTINS_LIBRARY} ${COVERAGE_OPTION} -lc -lm -lrt -lpthread -ldl")
+endif ()

 message(STATUS "Default libraries: ${DEFAULT_LIBS}")

@ -35,7 +40,11 @@ add_library(global-libs INTERFACE)
 set(THREADS_PREFER_PTHREAD_FLAG ON)
 find_package(Threads REQUIRED)

-add_subdirectory(base/glibc-compatibility)
+if (NOT OS_ANDROID)
+    # Our compatibility layer doesn't build under Android, many errors in musl.
+    add_subdirectory(base/glibc-compatibility)
+endif ()
+
 include (cmake/find/unwind.cmake)
 include (cmake/find/cxx.cmake)

--- a/cmake/target.cmake
+++ b/cmake/target.cmake
@ -1,6 +1,11 @@
 if (CMAKE_SYSTEM_NAME MATCHES "Linux")
    set (OS_LINUX 1)
    add_definitions(-D OS_LINUX)
+elseif (CMAKE_SYSTEM_NAME MATCHES "Android")
+    # This is a toy configuration and not in CI, so expect it to be broken.
+    # Use cmake flags such as: -DCMAKE_TOOLCHAIN_FILE=~/ch2/android-ndk-r21d/build/cmake/android.toolchain.cmake -DANDROID_ABI=arm64-v8a -DANDROID_PLATFORM=28
+    set (OS_ANDROID 1)
+    add_definitions(-D OS_ANDROID)
 elseif (CMAKE_SYSTEM_NAME MATCHES "FreeBSD")
    set (OS_FREEBSD 1)
    add_definitions(-D OS_FREEBSD)
@ -17,7 +22,7 @@ if (CMAKE_CROSSCOMPILING)
        set (ENABLE_PARQUET OFF CACHE INTERNAL "")
        set (ENABLE_ICU OFF CACHE INTERNAL "")
        set (ENABLE_FASTOPS OFF CACHE INTERNAL "")
-    elseif (OS_LINUX)
+    elseif (OS_LINUX OR OS_ANDROID)
        if (ARCH_AARCH64)
            # FIXME: broken dependencies
            set (ENABLE_PROTOBUF OFF CACHE INTERNAL "")
--- a/cmake/tools.cmake
+++ b/cmake/tools.cmake
@ -22,7 +22,7 @@ elseif (COMPILER_CLANG)
        if (CMAKE_CXX_COMPILER_VERSION VERSION_LESS ${APPLE_CLANG_MINIMUM_VERSION})
            message (FATAL_ERROR "AppleClang compiler version must be at least ${APPLE_CLANG_MINIMUM_VERSION} (Xcode ${XCODE_MINIMUM_VERSION}).")
        elseif (CMAKE_CXX_COMPILER_VERSION VERSION_LESS 11.0.0)
-            # char8_t is available staring (upstream vanilla) Clang 7, but prior to Clang 8,
+            # char8_t is available starting (upstream vanilla) Clang 7, but prior to Clang 8,
            # it is not enabled by -std=c++20 and can be enabled with an explicit -fchar8_t.
            set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fchar8_t")
            set (CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -fchar8_t")
--- a/contrib/CMakeLists.txt
+++ b/contrib/CMakeLists.txt
@ -102,7 +102,7 @@ if (USE_INTERNAL_SSL_LIBRARY)
    add_library(OpenSSL::SSL ALIAS ${OPENSSL_SSL_LIBRARY})
 endif ()

-if (ENABLE_LDAP AND USE_INTERNAL_LDAP_LIBRARY)
+if (USE_INTERNAL_LDAP_LIBRARY)
    add_subdirectory (openldap-cmake)
 endif ()

--- a/docker/images.json
+++ b/docker/images.json
@ -88,6 +88,10 @@
        "name": "yandex/clickhouse-testflows-runner",
        "dependent": []
    },
+    "docker/test/fasttest": {
+        "name": "yandex/clickhouse-fasttest",
+        "dependent": []
+    },
    "docker/test/integration/s3_proxy": {
        "name": "yandex/clickhouse-s3-proxy",
        "dependent": []
@ -96,4 +100,5 @@
        "name": "yandex/clickhouse-python-bottle",
        "dependent": []
    }
+
 }
--- a/docker/packager/binary/build.sh
+++ b/docker/packager/binary/build.sh
@ -33,6 +33,24 @@ then
    rm /output/clickhouse-odbc-bridge ||:

    cp -r ../docker/test/performance-comparison /output/scripts ||:
+
+    # We have to know the revision that corresponds to this binary build.
+    # It is not the nominal SHA from pull/*/head, but the pull/*/merge, which is
+    # head merged to master by github, at some point after the PR is updated.
+    # There are some quirks to consider:
+    # - apparently the real SHA is not recorded in system.build_options;
+    # - it can change at any time as github pleases, so we can't just record
+    #   the SHA and use it later, it might become inaccessible;
+    # - CI has an immutable snapshot of repository that it uses for all checks
+    #   for a given nominal SHA, but it is not accessible outside Yandex.
+    # This is why we add this repository snapshot from CI to the performance test
+    # package.
+    mkdir /output/ch
+    git -C /output/ch init --bare
+    git -C /output/ch remote add origin /build
+    git -C /output/ch fetch --no-tags --depth 50 origin HEAD
+    git -C /output/ch reset --soft FETCH_HEAD
+    git -C /output/ch log -5
 fi

 # May be set for split build or for performance test.
--- a/docker/test/fasttest/Dockerfile
+++ b/docker/test/fasttest/Dockerfile
@ -0,0 +1,65 @@
+#  docker build -t yandex/clickhouse-fasttest .
+FROM ubuntu:19.10
+
+ARG odbc_driver_url="https://github.com/ClickHouse/clickhouse-odbc/releases/download/v1.1.4.20200302/clickhouse-odbc-1.1.4-Linux.tar.gz"
+ENV COMMIT_SHA=''
+ENV PULL_REQUEST_NUMBER=''
+
+RUN apt-get --allow-unauthenticated update -y && apt-get install --yes wget gnupg
+RUN wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | apt-key add -
+RUN echo "deb [trusted=yes] http://apt.llvm.org/eoan/ llvm-toolchain-eoan-10 main" >> /etc/apt/sources.list
+
+
+RUN apt-get --allow-unauthenticated update -y \
+  && env DEBIAN_FRONTEND=noninteractive \
+      apt-get --allow-unauthenticated install --yes --no-install-recommends \
+          bash \
+          fakeroot \
+          ccache \
+          software-properties-common \
+          apt-transport-https \
+          ca-certificates \
+          wget \
+          bash \
+          fakeroot \
+          cmake \
+          ccache \
+          llvm-10 \
+          clang-10 \
+          lld-10 \
+          clang-tidy-10 \
+          ninja-build \
+          gperf \
+          git \
+          tzdata \
+          gperf \
+          rename \
+          build-essential \
+          expect \
+          python \
+          python-lxml \
+          python-termcolor \
+          python-requests \
+          unixodbc \
+          qemu-user-static \
+          sudo \
+          moreutils \
+          curl \
+          brotli
+
+RUN mkdir -p /tmp/clickhouse-odbc-tmp \
+  && wget --quiet -O - ${odbc_driver_url} | tar --strip-components=1 -xz -C /tmp/clickhouse-odbc-tmp \
+  && cp /tmp/clickhouse-odbc-tmp/lib64/*.so /usr/local/lib/ \
+  && odbcinst -i -d -f /tmp/clickhouse-odbc-tmp/share/doc/clickhouse-odbc/config/odbcinst.ini.sample \
+  && odbcinst -i -s -l -f /tmp/clickhouse-odbc-tmp/share/doc/clickhouse-odbc/config/odbc.ini.sample \
+  && rm -rf /tmp/clickhouse-odbc-tmp
+
+# This symlink required by gcc to find lld compiler
+RUN ln -s /usr/bin/lld-10 /usr/bin/ld.lld
+
+ENV TZ=Europe/Moscow
+RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone
+
+
+COPY run.sh /
+CMD ["/bin/bash", "/run.sh"]
--- a/docker/test/fasttest/run.sh
+++ b/docker/test/fasttest/run.sh
@ -0,0 +1,97 @@
+#!/bin/bash
+
+set -x -e
+
+ls -la
+
+git clone https://github.com/ClickHouse/ClickHouse.git | ts '%Y-%m-%d %H:%M:%S' | tee /test_output/clone_log.txt
+cd ClickHouse
+CLICKHOUSE_DIR=`pwd`
+
+
+if [ "$PULL_REQUEST_NUMBER" != "0" ]; then
+    if git fetch origin "+refs/pull/$PULL_REQUEST_NUMBER/merge"; then
+        git checkout FETCH_HEAD
+        echo 'Clonned merge head'
+    else
+        git fetch
+        git checkout $COMMIT_SHA
+        echo 'Checked out to commit'
+    fi
+else
+    if [ "$COMMIT_SHA" != "" ]; then
+        git checkout $COMMIT_SHA
+    fi
+fi
+
+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
+
+export 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
+export CCACHE_NOHASHDIR=true
+export CCACHE_COMPILERCHECK=content
+export CCACHE_MAXSIZE=15G
+
+ccache --show-stats ||:
+ccache --zero-stats ||:
+
+mkdir build
+cd build
+CLICKHOUSE_BUILD_DIR=`pwd`
+cmake .. -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_CXX_COMPILER=clang++-10 -DCMAKE_C_COMPILER=clang-10 $CMAKE_LIBS_CONFIG | ts '%Y-%m-%d %H:%M:%S' | tee /test_output/cmake_log.txt
+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
+
+
+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
+mkdir -p /var/log/clickhouse-server
+cp $CLICKHOUSE_DIR/programs/server/config.xml /etc/clickhouse-server/
+cp $CLICKHOUSE_DIR/programs/server/users.xml /etc/clickhouse-server/
+
+mkdir -p /etc/clickhouse-server/dict_examples
+ln -s /usr/share/clickhouse-test/config/ints_dictionary.xml /etc/clickhouse-server/dict_examples/
+ln -s /usr/share/clickhouse-test/config/strings_dictionary.xml /etc/clickhouse-server/dict_examples/
+ln -s /usr/share/clickhouse-test/config/decimals_dictionary.xml /etc/clickhouse-server/dict_examples/
+ln -s /usr/share/clickhouse-test/config/zookeeper.xml /etc/clickhouse-server/config.d/
+ln -s /usr/share/clickhouse-test/config/listen.xml /etc/clickhouse-server/config.d/
+ln -s /usr/share/clickhouse-test/config/part_log.xml /etc/clickhouse-server/config.d/
+ln -s /usr/share/clickhouse-test/config/text_log.xml /etc/clickhouse-server/config.d/
+ln -s /usr/share/clickhouse-test/config/metric_log.xml /etc/clickhouse-server/config.d/
+ln -s /usr/share/clickhouse-test/config/query_masking_rules.xml /etc/clickhouse-server/config.d/
+ln -s /usr/share/clickhouse-test/config/log_queries.xml /etc/clickhouse-server/users.d/
+ln -s /usr/share/clickhouse-test/config/readonly.xml /etc/clickhouse-server/users.d/
+ln -s /usr/share/clickhouse-test/config/access_management.xml /etc/clickhouse-server/users.d/
+ln -s /usr/share/clickhouse-test/config/ints_dictionary.xml /etc/clickhouse-server/
+ln -s /usr/share/clickhouse-test/config/strings_dictionary.xml /etc/clickhouse-server/
+ln -s /usr/share/clickhouse-test/config/decimals_dictionary.xml /etc/clickhouse-server/
+ln -s /usr/share/clickhouse-test/config/macros.xml /etc/clickhouse-server/config.d/
+ln -s /usr/share/clickhouse-test/config/disks.xml /etc/clickhouse-server/config.d/
+#ln -s /usr/share/clickhouse-test/config/secure_ports.xml /etc/clickhouse-server/config.d/
+ln -s /usr/share/clickhouse-test/config/clusters.xml /etc/clickhouse-server/config.d/
+ln -s /usr/share/clickhouse-test/config/graphite.xml /etc/clickhouse-server/config.d/
+ln -s /usr/share/clickhouse-test/config/server.key /etc/clickhouse-server/
+ln -s /usr/share/clickhouse-test/config/server.crt /etc/clickhouse-server/
+ln -s /usr/share/clickhouse-test/config/dhparam.pem /etc/clickhouse-server/
+ln -sf /usr/share/clickhouse-test/config/client_config.xml /etc/clickhouse-client/config.xml
+
+clickhouse-server --config /etc/clickhouse-server/config.xml --daemon
+
+until clickhouse-client --query "SELECT 1"
+do
+    sleep 0.1
+done
+
+TESTS_TO_SKIP="parquet avro h3 odbc mysql sha256 _orc_ arrow 01098_temporary_and_external_tables 01083_expressions_in_engine_arguments hdfs 00911_tautological_compare protobuf capnproto java_hash hashing secure 00490_special_line_separators_and_characters_outside_of_bmp 00436_convert_charset 00105_shard_collations 01354_order_by_tuple_collate_const 01292_create_user 01098_msgpack_format 00929_multi_match_edit_distance 00926_multimatch 00834_cancel_http_readonly_queries_on_client_close brotli parallel_alter 00302_http_compression 00417_kill_query 01294_lazy_database_concurrent 01193_metadata_loading base64 01031_mutations_interpreter_and_context json client 01305_replica_create_drop_zookeeper 01092_memory_profiler 01355_ilike 01281_unsucceeded_insert_select_queries_counter live_view limit_memory memory_limit memory_leak 00110_external_sort 00682_empty_parts_merge 00701_rollup 00109_shard_totals_after_having"
+
+clickhouse-test -j 4 --no-long --testname --shard --zookeeper --skip $TESTS_TO_SKIP 2>&1 | ts '%Y-%m-%d %H:%M:%S' | tee /test_output/test_log.txt
+
+mv /var/log/clickhouse-server/* /test_output
--- a/docker/test/integration/runner/compose/docker_compose_minio.yml
+++ b/docker/test/integration/runner/compose/docker_compose_minio.yml
@ -11,6 +11,7 @@ services:
    environment:
      MINIO_ACCESS_KEY: minio
      MINIO_SECRET_KEY: minio123
+      MINIO_PROMETHEUS_AUTH_TYPE: public
    command: server --address :9001 --certs-dir /certs /data1-1
    depends_on:
      - proxy1
--- a/docker/test/performance-comparison/compare.sh
+++ b/docker/test/performance-comparison/compare.sh
@ -498,7 +498,8 @@ create table queries engine File(TSVWithNamesAndTypes, 'report/queries.tsv')
        
        left, right, diff, stat_threshold,
        if(report_threshold > 0, report_threshold, 0.10) as report_threshold,
-        test, query_index, query_display_name
+        query_metric_stats.test test, query_metric_stats.query_index query_index,
+        query_display_name
    from query_metric_stats
    left join file('analyze/report-thresholds.tsv', TSV,
            'test text, report_threshold float') thresholds
@ -666,7 +667,8 @@ create view query_display_names as select * from

 create table unstable_query_runs engine File(TSVWithNamesAndTypes,
        'unstable-query-runs.$version.rep') as
-    select test, query_index, query_display_name, query_id
+    select query_runs.test test, query_runs.query_index query_index,
+        query_display_name, query_id
    from query_runs
    join queries_for_flamegraph on
        query_runs.test = queries_for_flamegraph.test
--- a/docker/test/stateful_with_coverage/run.sh
+++ b/docker/test/stateful_with_coverage/run.sh
@ -55,18 +55,21 @@ ln -s /usr/share/clickhouse-test/config/ints_dictionary.xml /etc/clickhouse-serv
    ln -s /usr/share/clickhouse-test/config/strings_dictionary.xml /etc/clickhouse-server/dict_examples/; \
    ln -s /usr/share/clickhouse-test/config/decimals_dictionary.xml /etc/clickhouse-server/dict_examples/;

-ln -s /usr/share/clickhouse-test/config/zookeeper.xml /etc/clickhouse-server/config.d/; \
-    ln -s /usr/share/clickhouse-test/config/listen.xml /etc/clickhouse-server/config.d/; \
-    ln -s /usr/share/clickhouse-test/config/part_log.xml /etc/clickhouse-server/config.d/; \
-    ln -s /usr/share/clickhouse-test/config/text_log.xml /etc/clickhouse-server/config.d/; \
-    ln -s /usr/share/clickhouse-test/config/metric_log.xml /etc/clickhouse-server/config.d/; \
-    ln -s /usr/share/clickhouse-test/config/query_masking_rules.xml /etc/clickhouse-server/config.d/; \
-    ln -s /usr/share/clickhouse-test/config/log_queries.xml /etc/clickhouse-server/users.d/; \
-    ln -s /usr/share/clickhouse-test/config/readonly.xml /etc/clickhouse-server/users.d/; \
-    ln -s /usr/share/clickhouse-test/config/ints_dictionary.xml /etc/clickhouse-server/; \
-    ln -s /usr/share/clickhouse-test/config/strings_dictionary.xml /etc/clickhouse-server/; \
-    ln -s /usr/share/clickhouse-test/config/decimals_dictionary.xml /etc/clickhouse-server/; \
-    ln -s /usr/share/clickhouse-test/config/macros.xml /etc/clickhouse-server/config.d/;
+ln -s /usr/share/clickhouse-test/config/zookeeper.xml /etc/clickhouse-server/config.d/
+ln -s /usr/share/clickhouse-test/config/listen.xml /etc/clickhouse-server/config.d/
+ln -s /usr/share/clickhouse-test/config/part_log.xml /etc/clickhouse-server/config.d/
+ln -s /usr/share/clickhouse-test/config/text_log.xml /etc/clickhouse-server/config.d/
+ln -s /usr/share/clickhouse-test/config/metric_log.xml /etc/clickhouse-server/config.d/
+ln -s /usr/share/clickhouse-test/config/log_queries.xml /etc/clickhouse-server/users.d/
+ln -s /usr/share/clickhouse-test/config/readonly.xml /etc/clickhouse-server/users.d/
+ln -s /usr/share/clickhouse-test/config/ints_dictionary.xml /etc/clickhouse-server/
+ln -s /usr/share/clickhouse-test/config/strings_dictionary.xml /etc/clickhouse-server/
+ln -s /usr/share/clickhouse-test/config/decimals_dictionary.xml /etc/clickhouse-server/
+ln -s /usr/share/clickhouse-test/config/macros.xml /etc/clickhouse-server/config.d/
+
+# Retain any pre-existing config and allow ClickHouse to load those if required
+ln -s --backup=simple --suffix=_original.xml \
+    /usr/share/clickhouse-test/config/query_masking_rules.xml /etc/clickhouse-server/config.d/


 service zookeeper start
--- a/docker/test/stateless/run.sh
+++ b/docker/test/stateless/run.sh
@ -17,7 +17,6 @@ ln -s /usr/share/clickhouse-test/config/listen.xml /etc/clickhouse-server/config
 ln -s /usr/share/clickhouse-test/config/part_log.xml /etc/clickhouse-server/config.d/
 ln -s /usr/share/clickhouse-test/config/text_log.xml /etc/clickhouse-server/config.d/
 ln -s /usr/share/clickhouse-test/config/metric_log.xml /etc/clickhouse-server/config.d/
-ln -s /usr/share/clickhouse-test/config/query_masking_rules.xml /etc/clickhouse-server/config.d/
 ln -s /usr/share/clickhouse-test/config/log_queries.xml /etc/clickhouse-server/users.d/
 ln -s /usr/share/clickhouse-test/config/readonly.xml /etc/clickhouse-server/users.d/
 ln -s /usr/share/clickhouse-test/config/access_management.xml /etc/clickhouse-server/users.d/
@ -33,6 +32,10 @@ ln -s /usr/share/clickhouse-test/config/server.key /etc/clickhouse-server/
 ln -s /usr/share/clickhouse-test/config/server.crt /etc/clickhouse-server/
 ln -s /usr/share/clickhouse-test/config/dhparam.pem /etc/clickhouse-server/

+# Retain any pre-existing config and allow ClickHouse to load it if required
+ln -s --backup=simple --suffix=_original.xml \
+    /usr/share/clickhouse-test/config/query_masking_rules.xml /etc/clickhouse-server/config.d/
+
 if [[ -n "$USE_POLYMORPHIC_PARTS" ]] && [[ "$USE_POLYMORPHIC_PARTS" -eq 1 ]]; then
    ln -s /usr/share/clickhouse-test/config/polymorphic_parts.xml /etc/clickhouse-server/config.d/
 fi
--- a/docker/test/stateless_with_coverage/run.sh
+++ b/docker/test/stateless_with_coverage/run.sh
@ -46,27 +46,30 @@ ln -s /usr/share/clickhouse-test/config/ints_dictionary.xml /etc/clickhouse-serv
    ln -s /usr/share/clickhouse-test/config/strings_dictionary.xml /etc/clickhouse-server/dict_examples/; \
    ln -s /usr/share/clickhouse-test/config/decimals_dictionary.xml /etc/clickhouse-server/dict_examples/;

-ln -s /usr/share/clickhouse-test/config/zookeeper.xml /etc/clickhouse-server/config.d/; \
-    ln -s /usr/share/clickhouse-test/config/listen.xml /etc/clickhouse-server/config.d/; \
-    ln -s /usr/share/clickhouse-test/config/part_log.xml /etc/clickhouse-server/config.d/; \
-    ln -s /usr/share/clickhouse-test/config/text_log.xml /etc/clickhouse-server/config.d/; \
-    ln -s /usr/share/clickhouse-test/config/metric_log.xml /etc/clickhouse-server/config.d/; \
-    ln -s /usr/share/clickhouse-test/config/query_masking_rules.xml /etc/clickhouse-server/config.d/; \
-    ln -s /usr/share/clickhouse-test/config/log_queries.xml /etc/clickhouse-server/users.d/; \
-    ln -s /usr/share/clickhouse-test/config/readonly.xml /etc/clickhouse-server/users.d/; \
-    ln -s /usr/share/clickhouse-test/config/access_management.xml /etc/clickhouse-server/users.d/; \
-    ln -s /usr/share/clickhouse-test/config/ints_dictionary.xml /etc/clickhouse-server/; \
-    ln -s /usr/share/clickhouse-test/config/strings_dictionary.xml /etc/clickhouse-server/; \
-    ln -s /usr/share/clickhouse-test/config/decimals_dictionary.xml /etc/clickhouse-server/; \
-    ln -s /usr/share/clickhouse-test/config/macros.xml /etc/clickhouse-server/config.d/; \
-    ln -s /usr/share/clickhouse-test/config/disks.xml /etc/clickhouse-server/config.d/; \
-    ln -s /usr/share/clickhouse-test/config/secure_ports.xml /etc/clickhouse-server/config.d/; \
-    ln -s /usr/share/clickhouse-test/config/clusters.xml /etc/clickhouse-server/config.d/; \
-    ln -s /usr/share/clickhouse-test/config/graphite.xml /etc/clickhouse-server/config.d/; \
-    ln -s /usr/share/clickhouse-test/config/server.key /etc/clickhouse-server/; \
-    ln -s /usr/share/clickhouse-test/config/server.crt /etc/clickhouse-server/; \
-    ln -s /usr/share/clickhouse-test/config/dhparam.pem /etc/clickhouse-server/; \
-    ln -sf /usr/share/clickhouse-test/config/client_config.xml /etc/clickhouse-client/config.xml
+ln -s /usr/share/clickhouse-test/config/zookeeper.xml /etc/clickhouse-server/config.d/
+ln -s /usr/share/clickhouse-test/config/listen.xml /etc/clickhouse-server/config.d/
+ln -s /usr/share/clickhouse-test/config/part_log.xml /etc/clickhouse-server/config.d/
+ln -s /usr/share/clickhouse-test/config/text_log.xml /etc/clickhouse-server/config.d/
+ln -s /usr/share/clickhouse-test/config/metric_log.xml /etc/clickhouse-server/config.d/
+ln -s /usr/share/clickhouse-test/config/log_queries.xml /etc/clickhouse-server/users.d/
+ln -s /usr/share/clickhouse-test/config/readonly.xml /etc/clickhouse-server/users.d/
+ln -s /usr/share/clickhouse-test/config/access_management.xml /etc/clickhouse-server/users.d/
+ln -s /usr/share/clickhouse-test/config/ints_dictionary.xml /etc/clickhouse-server/
+ln -s /usr/share/clickhouse-test/config/strings_dictionary.xml /etc/clickhouse-server/
+ln -s /usr/share/clickhouse-test/config/decimals_dictionary.xml /etc/clickhouse-server/
+ln -s /usr/share/clickhouse-test/config/macros.xml /etc/clickhouse-server/config.d/
+ln -s /usr/share/clickhouse-test/config/disks.xml /etc/clickhouse-server/config.d/
+ln -s /usr/share/clickhouse-test/config/secure_ports.xml /etc/clickhouse-server/config.d/
+ln -s /usr/share/clickhouse-test/config/clusters.xml /etc/clickhouse-server/config.d/
+ln -s /usr/share/clickhouse-test/config/graphite.xml /etc/clickhouse-server/config.d/
+ln -s /usr/share/clickhouse-test/config/server.key /etc/clickhouse-server/
+ln -s /usr/share/clickhouse-test/config/server.crt /etc/clickhouse-server/
+ln -s /usr/share/clickhouse-test/config/dhparam.pem /etc/clickhouse-server/
+ln -sf /usr/share/clickhouse-test/config/client_config.xml /etc/clickhouse-client/config.xml
+
+# Retain any pre-existing config and allow ClickHouse to load it if required
+ln -s --backup=simple --suffix=_original.xml \
+    /usr/share/clickhouse-test/config/query_masking_rules.xml /etc/clickhouse-server/config.d/

 service zookeeper start
 sleep 5
--- a/docker/test/stress/Dockerfile
+++ b/docker/test/stress/Dockerfile
@ -23,28 +23,7 @@ RUN apt-get update -y \
            brotli

 COPY ./stress /stress
+COPY run.sh /

 ENV DATASETS="hits visits"
-
-CMD dpkg -i package_folder/clickhouse-common-static_*.deb; \
-    dpkg -i package_folder/clickhouse-common-static-dbg_*.deb; \
-    dpkg -i package_folder/clickhouse-server_*.deb;  \
-    dpkg -i package_folder/clickhouse-client_*.deb; \
-    dpkg -i package_folder/clickhouse-test_*.deb; \
-    ln -s /usr/share/clickhouse-test/config/log_queries.xml /etc/clickhouse-server/users.d/; \
-    ln -s /usr/share/clickhouse-test/config/part_log.xml /etc/clickhouse-server/config.d/; \
-    echo "TSAN_OPTIONS='halt_on_error=1 history_size=7 ignore_noninstrumented_modules=1 verbosity=1'" >> /etc/environment; \
-    echo "UBSAN_OPTIONS='print_stacktrace=1'" >> /etc/environment; \
-    echo "ASAN_OPTIONS='malloc_context_size=10 verbosity=1 allocator_release_to_os_interval_ms=10000'" >> /etc/environment; \
-    service clickhouse-server start && sleep 5 \
-    && /s3downloader --dataset-names $DATASETS \
-    && chmod 777 -R /var/lib/clickhouse \
-    && clickhouse-client --query "ATTACH DATABASE IF NOT EXISTS datasets ENGINE = Ordinary" \
-    && clickhouse-client --query "CREATE DATABASE IF NOT EXISTS test" \
-    && service clickhouse-server restart && sleep 5 \
-    && clickhouse-client --query "SHOW TABLES FROM datasets" \
-    && clickhouse-client --query "SHOW TABLES FROM test" \
-    && clickhouse-client --query "RENAME TABLE datasets.hits_v1 TO test.hits" \
-    && clickhouse-client --query "RENAME TABLE datasets.visits_v1 TO test.visits" \
-    && clickhouse-client --query "SHOW TABLES FROM test" \
-    && ./stress --output-folder test_output --skip-func-tests "$SKIP_TESTS_OPTION"
+CMD ["/bin/bash", "/run.sh"]
--- a/docker/test/stress/run.sh
+++ b/docker/test/stress/run.sh
@ -0,0 +1,56 @@
+#!/bin/bash
+
+set -x
+
+dpkg -i package_folder/clickhouse-common-static_*.deb
+dpkg -i package_folder/clickhouse-common-static-dbg_*.deb
+dpkg -i package_folder/clickhouse-server_*.deb
+dpkg -i package_folder/clickhouse-client_*.deb
+dpkg -i package_folder/clickhouse-test_*.deb
+
+function wait_server()
+{
+    counter=0
+    until clickhouse-client --query "SELECT 1"
+    do
+        if [ "$counter" -gt 120 ]
+        then
+            break
+        fi
+        sleep 0.5
+        counter=$(($counter + 1))
+    done
+}
+
+ln -s /usr/share/clickhouse-test/config/log_queries.xml /etc/clickhouse-server/users.d/
+ln -s /usr/share/clickhouse-test/config/part_log.xml /etc/clickhouse-server/config.d/
+
+echo "TSAN_OPTIONS='halt_on_error=1 history_size=7 ignore_noninstrumented_modules=1 verbosity=1'" >> /etc/environment
+echo "UBSAN_OPTIONS='print_stacktrace=1'" >> /etc/environment
+echo "ASAN_OPTIONS='malloc_context_size=10 verbosity=1 allocator_release_to_os_interval_ms=10000'" >> /etc/environment
+
+service clickhouse-server start
+
+wait_server
+
+/s3downloader --dataset-names $DATASETS
+chmod 777 -R /var/lib/clickhouse
+clickhouse-client --query "ATTACH DATABASE IF NOT EXISTS datasets ENGINE = Ordinary"
+clickhouse-client --query "CREATE DATABASE IF NOT EXISTS test"
+service clickhouse-server restart
+
+wait_server
+
+clickhouse-client --query "SHOW TABLES FROM datasets"
+clickhouse-client --query "SHOW TABLES FROM test"
+clickhouse-client --query "RENAME TABLE datasets.hits_v1 TO test.hits"
+clickhouse-client --query "RENAME TABLE datasets.visits_v1 TO test.visits"
+clickhouse-client --query "SHOW TABLES FROM test"
+
+./stress --output-folder test_output --skip-func-tests "$SKIP_TESTS_OPTION"
+
+service clickhouse-server restart
+
+wait_server
+
+clickhouse-client --query "SELECT 'Server successfuly started'" > /test_output/alive_check.txt || echo 'Server failed to start' > /test_output/alive_check.txt
--- a/docker/test/stress/stress
+++ b/docker/test/stress/stress
@ -41,15 +41,6 @@ def run_func_test(cmd, output_prefix, num_processes, skip_tests_option):
    return pipes


-def check_clickhouse_alive(cmd):
-    try:
-        logging.info("Checking ClickHouse still alive")
-        check_call("{} --query \"select 'Still alive'\"".format(cmd), shell=True)
-        return True
-    except:
-        return False
-
-
 if __name__ == "__main__":
    logging.basicConfig(level=logging.INFO, format='%(asctime)s %(message)s')
    parser = argparse.ArgumentParser(description="ClickHouse script for running stresstest")
@ -65,29 +56,18 @@ if __name__ == "__main__":
    args = parser.parse_args()
    func_pipes = []
    perf_process = None
-    try:
-        perf_process = run_perf_test(args.perf_test_cmd, args.perf_test_xml_path, args.output_folder)
-        func_pipes = run_func_test(args.test_cmd, args.output_folder, args.num_parallel, args.skip_func_tests)
+    perf_process = run_perf_test(args.perf_test_cmd, args.perf_test_xml_path, args.output_folder)
+    func_pipes = run_func_test(args.test_cmd, args.output_folder, args.num_parallel, args.skip_func_tests)

-        logging.info("Will wait functests to finish")
-        while True:
-            retcodes = []
-            for p in func_pipes:
-                if p.poll() is not None:
-                    retcodes.append(p.returncode)
-            if len(retcodes) == len(func_pipes):
-                break
-            logging.info("Finished %s from %s processes", len(retcodes), len(func_pipes))
-            time.sleep(5)
+    logging.info("Will wait functests to finish")
+    while True:
+        retcodes = []
+        for p in func_pipes:
+            if p.poll() is not None:
+                retcodes.append(p.returncode)
+        if len(retcodes) == len(func_pipes):
+            break
+        logging.info("Finished %s from %s processes", len(retcodes), len(func_pipes))
+        time.sleep(5)

-        if not check_clickhouse_alive(args.client_cmd):
-            raise Exception("Stress failed, results in logs")
-        else:
-            logging.info("Stress is ok")
-    except Exception as ex:
-        raise ex
-    finally:
-        if os.path.exists(args.server_log_folder):
-            logging.info("Copying server log files")
-            for log_file in os.listdir(args.server_log_folder):
-                shutil.copy(os.path.join(args.server_log_folder, log_file), os.path.join(args.output_folder, log_file))
+    logging.info("Stress test finished")
--- a/docker/test/testflows/runner/Dockerfile
+++ b/docker/test/testflows/runner/Dockerfile
@ -35,7 +35,7 @@ RUN apt-get update \
 ENV TZ=Europe/Moscow
 RUN ln -snf /usr/share/zoneinfo/$TZ /etc/localtime && echo $TZ > /etc/timezone

-RUN pip3 install urllib3 testflows==1.6.24 docker-compose docker dicttoxml kazoo tzlocal
+RUN pip3 install urllib3 testflows==1.6.39 docker-compose docker dicttoxml kazoo tzlocal

 ENV DOCKER_CHANNEL stable
 ENV DOCKER_VERSION 17.09.1-ce
--- a/docs/en/engines/table-engines/special/join.md
+++ b/docs/en/engines/table-engines/special/join.md
@ -24,7 +24,7 @@ See the detailed description of the [CREATE TABLE](../../../sql-reference/statem

 **Engine Parameters**

-   `join_strictness` – [JOIN strictness](../../../sql-reference/statements/select/join.md#select-join-strictness).
+-   `join_strictness` – [JOIN strictness](../../../sql-reference/statements/select/join.md#select-join-types).
 -   `join_type` – [JOIN type](../../../sql-reference/statements/select/join.md#select-join-types).
 -   `k1[, k2, ...]` – Key columns from the `USING` clause that the `JOIN` operation is made with.

--- a/docs/en/introduction/adopters.md
+++ b/docs/en/introduction/adopters.md
@ -44,6 +44,7 @@ toc_title: Adopters
 | <a href="https://www.lbl.gov" class="favicon">Lawrence Berkeley National Laboratory</a>        | Research                        | Traffic analysis      | 1 server                                                   | 11.8 TiB                                                                     | [Slides in English, April 2019](https://www.smitasin.com/presentations/2019-04-17_DOE-NSM.pdf)                                                                                                                          |
 | <a href="https://lifestreet.com/" class="favicon">LifeStreet</a>                               | Ad network                      | Main product          | 75 servers (3 replicas)                                    | 5.27 PiB                                                                     | [Blog post in Russian, February 2017](https://habr.com/en/post/322620/)                                                                                                                                                 |
 | <a href="https://mcs.mail.ru/" class="favicon">Mail.ru Cloud Solutions</a>                     | Cloud services                  | Main product          | —                                                          | —                                                                            | [Article in Russian](https://mcs.mail.ru/help/db-create/clickhouse#)                                                                                                                                                    |
+| <a href="https://tech.mymarilyn.ru" class="favicon">Marilyn</a>                                | Advertising                     | Statistics            | —                                                          | —                                                                            | [Talk in Russian, June 2017](https://www.youtube.com/watch?v=iXlIgx2khwc)                                                                                                                                               |
 | <a href="https://www.messagebird.com" class="favicon">MessageBird</a>                          | Telecommunications              | Statistics            | —                                                          | —                                                                            | [Slides in English, November 2018](https://github.com/ClickHouse/clickhouse-presentations/blob/master/meetup20/messagebird.pdf)                                                                                         |
 | <a href="https://www.mgid.com/" class="favicon">MGID</a>                                       | Ad network                      | Web-analytics         | —                                                          | —                                                                            | [Blog post in Russian, April 2020](http://gs-studio.com/news-about-it/32777----clickhouse---c)                                                                                                                          |
 | <a href="https://www.oneapm.com/" class="favicon">OneAPM</a>                                   | Monitorings and Data Analysis   | Main product          | —                                                          | —                                                                            | [Slides in Chinese, October 2018](https://github.com/ClickHouse/clickhouse-presentations/blob/master/meetup19/8.%20clickhouse在OneAPM的应用%20杜龙.pdf)                                                                 |
--- a/docs/en/operations/settings/settings.md
+++ b/docs/en/operations/settings/settings.md
@ -471,7 +471,7 @@ Default value: 0.

 See also:

-   [JOIN strictness](../../sql-reference/statements/select/join.md#select-join-strictness)
+-   [JOIN strictness](../../sql-reference/statements/select/join.md#join-settings)

 ## temporary\_files\_codec {#temporary_files_codec}

--- a/docs/en/sql-reference/statements/select/join.md
+++ b/docs/en/sql-reference/statements/select/join.md
@ -11,7 +11,7 @@ Syntax:
 ``` sql
 SELECT <expr_list>
 FROM <left_table>
-[GLOBAL] [ANY|ALL|ASOF] [INNER|LEFT|RIGHT|FULL|CROSS] [OUTER|SEMI|ANTI] JOIN <right_table>
+[GLOBAL] [INNER|LEFT|RIGHT|FULL|CROSS] [OUTER|SEMI|ANTI|ANY|ASOF] JOIN <right_table>
 (ON <expr_list>)|(USING <column_list>) ...
 ```

@ -33,17 +33,13 @@ Additional join types available in ClickHouse:

 -   `LEFT SEMI JOIN` and `RIGHT SEMI JOIN`, a whitelist on “join keys”, without producing a cartesian product.
 -   `LEFT ANTI JOIN` and `RIGHT ANTI JOIN`, a blacklist on “join keys”, without producing a cartesian product.
+-   `LEFT ANY JOIN`, `RIGHT ANY JOIN` and `INNER ANY JOIN`, partially (for opposite side of `LEFT` and `RIGHT`) or completely (for `INNER` and `FULL`) disables the cartesian product for standard `JOIN` types.
+-   `ASOF JOIN` and `LEFT ASOF JOIN`, joining sequences with a non-exact match. `ASOF JOIN` usage is described below.

-## Strictness {#select-join-strictness}
-
-Modifies how matching by “join keys” is performed
-
-   `ALL` — The standard `JOIN` behavior in SQL as described above. The default.
-   `ANY` — Partially (for opposite side of `LEFT` and `RIGHT`) or completely (for `INNER` and `FULL`) disables the cartesian product for standard `JOIN` types.
-   `ASOF` — For joining sequences with a non-exact match. `ASOF JOIN` usage is described below.
+## Setting {#join-settings}

 !!! note "Note"
-    The default strictness value can be overriden using [join\_default\_strictness](../../../operations/settings/settings.md#settings-join_default_strictness) setting.
+    The default join type can be overriden using [join\_default\_strictness](../../../operations/settings/settings.md#settings-join_default_strictness) setting.

    Also the behavior of ClickHouse server for `ANY JOIN` operations depends on the [any_join_distinct_right_table_keys](../../../operations/settings/settings.md#any_join_distinct_right_table_keys) setting.

--- a/docs/es/engines/table-engines/special/join.md
+++ b/docs/es/engines/table-engines/special/join.md
@ -23,7 +23,7 @@ Vea la descripción detallada del [CREATE TABLE](../../../sql-reference/statemen

 **Parámetros del motor**

-   `join_strictness` – [ÚNETE a la rigurosidad](../../../sql-reference/statements/select/join.md#select-join-strictness).
+-   `join_strictness` – [ÚNETE a la rigurosidad](../../../sql-reference/statements/select/join.md#select-join-types).
 -   `join_type` – [Tipo de unión](../../../sql-reference/statements/select/join.md#select-join-types).
 -   `k1[, k2, ...]` – Key columns from the `USING` cláusula que el `JOIN` operación se hace con.

--- a/docs/es/sql-reference/statements/select/join.md
+++ b/docs/es/sql-reference/statements/select/join.md
@ -12,7 +12,7 @@ Sintaxis:
 ``` sql
 SELECT <expr_list>
 FROM <left_table>
-[GLOBAL] [ANY|ALL|ASOF] [INNER|LEFT|RIGHT|FULL|CROSS] [OUTER|SEMI|ANTI] JOIN <right_table>
+[GLOBAL] [INNER|LEFT|RIGHT|FULL|CROSS] [OUTER|SEMI|ANTI|ANY|ASOF] JOIN <right_table>
 (ON <expr_list>)|(USING <column_list>) ...
 ```

@ -34,14 +34,10 @@ Tipos de unión adicionales disponibles en ClickHouse:

 -   `LEFT SEMI JOIN` y `RIGHT SEMI JOIN`, una lista blanca en “join keys”, sin producir un producto cartesiano.
 -   `LEFT ANTI JOIN` y `RIGHT ANTI JOIN`, una lista negra sobre “join keys”, sin producir un producto cartesiano.
+-   `LEFT ANY JOIN`, `RIGHT ANY JOIN` and `INNER ANY JOIN`, partially (for opposite side of `LEFT` and `RIGHT`) or completely (for `INNER` and `FULL`) disables the cartesian product for standard `JOIN` types.
+-   `ASOF JOIN` and `LEFT ASOF JOIN`, joining sequences with a non-exact match. `ASOF JOIN` usage is described below.

-## Rigor {#select-join-strictness}
-
-Modifica cómo coincidir por “join keys” se realiza
-
-   `ALL` — The standard `JOIN` comportamiento en SQL como se describió anteriormente. Predeterminado.
-   `ANY` — Partially (for opposite side of `LEFT` y `RIGHT`) o completamente (para `INNER` y `FULL`) deshabilita el producto cartesiano para `JOIN` tipo.
-   `ASOF` — For joining sequences with a non-exact match. `ASOF JOIN` el uso se describe a continuación.
+## Setting {#join-settings}

 !!! note "Nota"
    El valor de rigor predeterminado se puede anular usando [Por favor, introduzca su dirección de correo electrónico](../../../operations/settings/settings.md#settings-join_default_strictness) configuración.
--- a/docs/fa/engines/table-engines/special/join.md
+++ b/docs/fa/engines/table-engines/special/join.md
@ -23,7 +23,7 @@ CREATE TABLE [IF NOT EXISTS] [db.]table_name [ON CLUSTER cluster]

 **پارامترهای موتور**

-   `join_strictness` – [پیوستن به سختی](../../../sql-reference/statements/select/join.md#select-join-strictness).
+-   `join_strictness` – [پیوستن به سختی](../../../sql-reference/statements/select/join.md#select-join-types).
 -   `join_type` – [پیوستن به نوع](../../../sql-reference/statements/select/join.md#select-join-types).
 -   `k1[, k2, ...]` – Key columns from the `USING` بند که `JOIN` عملیات با ساخته شده.

--- a/docs/fa/sql-reference/statements/select/join.md
+++ b/docs/fa/sql-reference/statements/select/join.md
@ -12,7 +12,7 @@ machine_translated_rev: 72537a2d527c63c07aa5d2361a8829f3895cf2bd
 ``` sql
 SELECT <expr_list>
 FROM <left_table>
-[GLOBAL] [ANY|ALL|ASOF] [INNER|LEFT|RIGHT|FULL|CROSS] [OUTER|SEMI|ANTI] JOIN <right_table>
+[GLOBAL] [INNER|LEFT|RIGHT|FULL|CROSS] [OUTER|SEMI|ANTI|ANY|ASOF] JOIN <right_table>
 (ON <expr_list>)|(USING <column_list>) ...
 ```

@ -34,15 +34,12 @@ FROM <left_table>

 -   `LEFT SEMI JOIN` و `RIGHT SEMI JOIN`, یک لیست سفید در “join keys”, بدون تولید محصول دکارتی.
 -   `LEFT ANTI JOIN` و `RIGHT ANTI JOIN`, لیست سیاه در “join keys”, بدون تولید محصول دکارتی.
+-   `LEFT ANY JOIN`, `RIGHT ANY JOIN` و `INNER ANY JOIN`, partially (for opposite side of `LEFT` and `RIGHT`) or completely (for `INNER` and `FULL`) disables the cartesian product for standard `JOIN` types.
+-   `ASOF JOIN` و `LEFT ASOF JOIN`, joining sequences with a non-exact match. `ASOF JOIN` usage is described below.

-## سختی {#select-join-strictness}
+## Setting {#join-settings}

 تغییر چگونگی تطبیق توسط “join keys” انجام شده است
-
-   `ALL` — The standard `JOIN` رفتار در گذاشتن همانطور که در بالا توضیح. به طور پیش فرض.
-   `ANY` — Partially (for opposite side of `LEFT` و `RIGHT`) یا به طور کامل (برای `INNER` و `FULL`) غیر فعال محصول دکارتی برای استاندارد `JOIN` انواع.
-   `ASOF` — For joining sequences with a non-exact match. `ASOF JOIN` استفاده در زیر توضیح داده شده است.
-
 !!! note "یادداشت"
    مقدار سختگیرانه پیش فرض را می توان با استفاده از لغو [بررسی اجمالی](../../../operations/settings/settings.md#settings-join_default_strictness) تنظیمات.

--- a/docs/fr/engines/table-engines/special/join.md
+++ b/docs/fr/engines/table-engines/special/join.md
@ -23,7 +23,7 @@ Voir la description détaillée de la [CREATE TABLE](../../../sql-reference/stat

 **Les Paramètres Du Moteur**

-   `join_strictness` – [ADHÉRER à la rigueur](../../../sql-reference/statements/select/join.md#select-join-strictness).
+-   `join_strictness` – [ADHÉRER à la rigueur](../../../sql-reference/statements/select/join.md#select-join-types).
 -   `join_type` – [Type de jointure](../../../sql-reference/statements/select/join.md#select-join-types).
 -   `k1[, k2, ...]` – Key columns from the `USING` la clause que l' `JOIN` l'opération est faite avec de la.

--- a/docs/fr/sql-reference/statements/select/join.md
+++ b/docs/fr/sql-reference/statements/select/join.md
@ -12,7 +12,7 @@ Syntaxe:
 ``` sql
 SELECT <expr_list>
 FROM <left_table>
-[GLOBAL] [ANY|ALL|ASOF] [INNER|LEFT|RIGHT|FULL|CROSS] [OUTER|SEMI|ANTI] JOIN <right_table>
+[GLOBAL] [INNER|LEFT|RIGHT|FULL|CROSS] [OUTER|SEMI|ANTI|ANY|ASOF] JOIN <right_table>
 (ON <expr_list>)|(USING <column_list>) ...
 ```

@ -34,14 +34,10 @@ Autres types de jointure disponibles dans ClickHouse:

 -   `LEFT SEMI JOIN` et `RIGHT SEMI JOIN` une liste blanche sur “join keys”, sans produire un produit cartésien.
 -   `LEFT ANTI JOIN` et `RIGHT ANTI JOIN` une liste noire sur “join keys”, sans produire un produit cartésien.
+-   `LEFT ANY JOIN`, `RIGHT ANY JOIN` et `INNER ANY JOIN`, partially (for opposite side of `LEFT` and `RIGHT`) or completely (for `INNER` and `FULL`) disables the cartesian product for standard `JOIN` types.
+-   `ASOF JOIN` et `LEFT ASOF JOIN`, joining sequences with a non-exact match. `ASOF JOIN` usage is described below.

-## Rigueur {#select-join-strictness}
-
-Modifie la façon dont la correspondance par “join keys” est effectué
-
-   `ALL` — The standard `JOIN` comportement en SQL comme décrit ci-dessus. Défaut.
-   `ANY` — Partially (for opposite side of `LEFT` et `RIGHT`) ou complètement (pour `INNER` et `FULL`) désactive le produit cartésien de la norme `JOIN` type.
-   `ASOF` — For joining sequences with a non-exact match. `ASOF JOIN` l'utilisation est décrite ci-dessous.
+## Setting {#join-settings}

 !!! note "Note"
    La valeur de rigueur par défaut peut être remplacée à l'aide [join\_default\_strictness](../../../operations/settings/settings.md#settings-join_default_strictness) paramètre.
--- a/docs/ja/engines/table-engines/special/join.md
+++ b/docs/ja/engines/table-engines/special/join.md
@ -23,7 +23,7 @@ CREATE TABLE [IF NOT EXISTS] [db.]table_name [ON CLUSTER cluster]

 **エンジン変数**

-   `join_strictness` – [厳密に結合する](../../../sql-reference/statements/select/join.md#select-join-strictness).
+-   `join_strictness` – [厳密に結合する](../../../sql-reference/statements/select/join.md#select-join-types).
 -   `join_type` – [結合タイプ](../../../sql-reference/statements/select/join.md#select-join-types).
 -   `k1[, k2, ...]` – Key columns from the `USING` 句は、 `JOIN` 操作はでなされる。

--- a/docs/ru/engines/table-engines/special/join.md
+++ b/docs/ru/engines/table-engines/special/join.md
@ -16,7 +16,7 @@ CREATE TABLE [IF NOT EXISTS] [db.]table_name [ON CLUSTER cluster]

 **Параметры движка**

-   `join_strictness` – [строгость JOIN](../../../engines/table-engines/special/join.md#select-join-strictness).
+-   `join_strictness` – [строгость JOIN](../../../engines/table-engines/special/join.md#select-join-types).
 -   `join_type` – [тип JOIN](../../../engines/table-engines/special/join.md#select-join-types).
 -   `k1[, k2, ...]` – ключевые столбцы секции `USING` с которыми выполняется операция `JOIN`.

--- a/docs/ru/sql-reference/statements/select/join.md
+++ b/docs/ru/sql-reference/statements/select/join.md
@ -7,7 +7,7 @@ Join создаёт новую таблицу путем объединения
 ``` sql
 SELECT <expr_list>
 FROM <left_table>
-[GLOBAL] [ANY|ALL|ASOF] [INNER|LEFT|RIGHT|FULL|CROSS] [OUTER|SEMI|ANTI] JOIN <right_table>
+[GLOBAL] [INNER|LEFT|RIGHT|FULL|CROSS] [OUTER|SEMI|ANTI|ANY|ASOF] JOIN <right_table>
 (ON <expr_list>)|(USING <column_list>) ...
 ```

@ -29,18 +29,14 @@ FROM <left_table>

 -   `LEFT SEMI JOIN` и `RIGHT SEMI JOIN`, белый список по ключам соединения, не производит декартово произведение.
 -   `LEFT ANTI JOIN` и `RIGHT ANTI JOIN`, черный список по ключам соединения, не производит декартово произведение.
+-   `LEFT ANY JOIN`, `RIGHT ANY JOIN` и `INNER ANY JOIN`, Частично (для противоположных сторон `LEFT` и `RIGHT`) или полностью (для `INNER` и `FULL`) отключает декартово произведение для стандартых видов `JOIN`.
+-   `ASOF JOIN` и `LEFT ASOF JOIN`, Для соединения последовательностей по нечеткому совпадению. Использование `ASOF JOIN` описано ниже.

-## Строгость {#select-join-strictness}
-
-Изменяет способ сопоставления по ключам соединения:
-
-   `ALL` — стандартное поведение `JOIN` в SQL, как описано выше. По умолчанию.
-   `ANY` — Частично (для противоположных сторон `LEFT` и `RIGHT`) или полностью (для `INNER` и `FULL`) отключает декартово произведение для стандартых видов `JOIN`.
-   `ASOF` — Для соединения последовательностей по нечеткому совпадению. Использование `ASOF JOIN` описано ниже.
+## Настройки {#join-settings}

 !!! note "Примечание"
    Значение строгости по умолчанию может быть переопределено с помощью настройки [join\_default\_strictness](../../../operations/settings/settings.md#settings-join_default_strictness).
-
+    
 ### Использование ASOF JOIN {#asof-join-usage}

 `ASOF JOIN` применим в том случае, когда необходимо объединять записи, которые не имеют точного совпадения.
--- a/docs/tools/deploy-to-test.sh
+++ b/docs/tools/deploy-to-test.sh
@ -4,8 +4,11 @@
 # This script deploys ClickHouse website to your personal test subdomain.
 #
 # Before first use of this script:
-# 1) Create https://github.com/GIT_USER/clickhouse.github.io repo (replace GIT_USER with your GitHub login)
-# 2) Send email on address from https://clickhouse.tech/#contacts asking to create GIT_USER-test.clickhouse.tech domain
+# 1) Set up building documentation according to https://github.com/ClickHouse/ClickHouse/tree/master/docs/tools#use-buildpy-use-build-py
+# 2) Create https://github.com/GIT_USER/clickhouse.github.io repo (replace GIT_USER with your GitHub login)
+# 3) Enable GitHub Pages in settings of this repo
+# 4) Add file named CNAME in root of this repo with "GIT_USER-test.clickhouse.tech" content (without quotes)
+# 5) Send email on address from https://clickhouse.tech/#contacts asking to create GIT_USER-test.clickhouse.tech domain
 #
 set -ex

--- a/docs/tr/engines/table-engines/special/join.md
+++ b/docs/tr/engines/table-engines/special/join.md
@ -23,7 +23,7 @@ Ayrıntılı açıklamasına bakın [CREATE TABLE](../../../sql-reference/statem

 **Motor Parametreleri**

-   `join_strictness` – [Katılık katılın](../../../sql-reference/statements/select/join.md#select-join-strictness).
+-   `join_strictness` – [Katılık katılın](../../../sql-reference/statements/select/join.md#select-join-types).
 -   `join_type` – [Birleştirme türü](../../../sql-reference/statements/select/join.md#select-join-types).
 -   `k1[, k2, ...]` – Key columns from the `USING` fık thera: `JOIN` işlemi yapılmamaktadır.

--- a/docs/zh/engines/table-engines/special/join.md
+++ b/docs/zh/engines/table-engines/special/join.md
@ -24,7 +24,7 @@ CREATE TABLE [IF NOT EXISTS] [db.]table_name [ON CLUSTER cluster]

 **引擎参数**

-   `join_strictness` – [JOIN 限制](../../../sql-reference/statements/select/join.md#select-join-strictness).
+-   `join_strictness` – [JOIN 限制](../../../sql-reference/statements/select/join.md#select-join-types).
 -   `join_type` – [JOIN 类型](../../../sql-reference/statements/select/join.md#select-join-types).
 -   `k1[, k2, ...]` – 进行`JOIN` 操作时 `USING`语句用到的key列

--- a/docs/zh/sql-reference/statements/select/join.md
+++ b/docs/zh/sql-reference/statements/select/join.md
@ -13,7 +13,7 @@ Join通过使用一个或多个表的公共值合并来自一个或多个表的
 ``` sql
 SELECT <expr_list>
 FROM <left_table>
-[GLOBAL] [ANY|ALL|ASOF] [INNER|LEFT|RIGHT|FULL|CROSS] [OUTER|SEMI|ANTI] JOIN <right_table>
+[GLOBAL] [INNER|LEFT|RIGHT|FULL|CROSS] [OUTER|SEMI|ANTI|ANY|ASOF] JOIN <right_table>
 (ON <expr_list>)|(USING <column_list>) ...
 ```

@ -35,14 +35,10 @@ ClickHouse中提供的其他联接类型:

 -   `LEFT SEMI JOIN` 和 `RIGHT SEMI JOIN`,白名单 “join keys”，而不产生笛卡尔积。
 -   `LEFT ANTI JOIN` 和 `RIGHT ANTI JOIN`，黑名单 “join keys”，而不产生笛卡尔积。
+-   `LEFT ANY JOIN`, `RIGHT ANY JOIN` and `INNER ANY JOIN`, partially (for opposite side of `LEFT` and `RIGHT`) or completely (for `INNER` and `FULL`) disables the cartesian product for standard `JOIN` types.
+-   `ASOF JOIN` and `LEFT ASOF JOIN`, joining sequences with a non-exact match. `ASOF JOIN` usage is described below.

-## 严格 {#select-join-strictness}
-
-修改如何匹配 “join keys” 执行
-
-   `ALL` — The standard `JOIN` sql中的行为如上所述。 默认值。
-   `ANY` — Partially (for opposite side of `LEFT` 和 `RIGHT`）或完全（为 `INNER` 和 `FULL`）禁用笛卡尔积为标准 `JOIN` 类型。
-   `ASOF` — For joining sequences with a non-exact match. `ASOF JOIN` 用法描述如下。
+## 严格 {#join-settings}

 !!! note "注"
    可以使用以下方式复盖默认的严格性值 [join\_default\_strictness](../../../operations/settings/settings.md#settings-join_default_strictness) 设置。
--- a/programs/local/LocalServer.cpp
+++ b/programs/local/LocalServer.cpp
@ -215,6 +215,9 @@ try

    /// Skip networking

+    /// Sets external authenticators config (LDAP).
+    context->setExternalAuthenticatorsConfig(config());
+
    setupUsers();

    /// Limit on total number of concurrently executing queries.
--- a/programs/server/Server.cpp
+++ b/programs/server/Server.cpp
@ -295,7 +295,7 @@ int Server::main(const std::vector<std::string> & /*args*/)
 #endif

    /** Context contains all that query execution is dependent:
-      *  settings, available functions, data types, aggregate functions, databases...
+      *  settings, available functions, data types, aggregate functions, databases, ...
      */
    auto shared_context = Context::createShared();
    auto global_context = std::make_unique<Context>(Context::createGlobal(shared_context.get()));
@ -543,6 +543,7 @@ int Server::main(const std::vector<std::string> & /*args*/)
            //buildLoggers(*config, logger());
            global_context->setClustersConfig(config);
            global_context->setMacros(std::make_unique<Macros>(*config, "macros"));
+            global_context->setExternalAuthenticatorsConfig(*config);

            /// Setup protection to avoid accidental DROP for big tables (that are greater than 50 GB by default)
            if (config->has("max_table_size_to_drop"))
--- a/programs/server/config.xml
+++ b/programs/server/config.xml
@ -215,6 +215,47 @@
    <!-- Path to folder where users and roles created by SQL commands are stored. -->
    <access_control_path>/var/lib/clickhouse/access/</access_control_path>

+    <!-- External user directories (LDAP). -->
+    <ldap_servers>
+        <!-- List LDAP servers with their connection parameters here to later use them as authenticators for dedicated users,
+             who have 'ldap' authentication mechanism specified instead of 'password'.
+             Parameters:
+                host - LDAP server hostname or IP, this parameter is mandatory and cannot be empty.
+                port - LDAP server port, default is 636 if enable_tls is set to true, 389 otherwise.
+                auth_dn_prefix, auth_dn_suffix - prefix and suffix used to construct the DN to bind to.
+                        Effectively, the resulting DN will be constructed as auth_dn_prefix + escape(user_name) + auth_dn_suffix string.
+                        Note, that this implies that auth_dn_suffix should usually have comma ',' as its first non-space character.
+                enable_tls - flag to trigger use of secure connection to the LDAP server.
+                        Specify 'no' for plain text (ldap://) protocol (not recommended).
+                        Specify 'yes' for LDAP over SSL/TLS (ldaps://) protocol (recommended, the default).
+                        Specify 'starttls' for legacy StartTLS protocol (plain text (ldap://) protocol, upgraded to TLS).
+                tls_minimum_protocol_version - the minimum protocol version of SSL/TLS.
+                        Accepted values are: 'ssl2', 'ssl3', 'tls1.0', 'tls1.1', 'tls1.2' (the default).
+                tls_require_cert - SSL/TLS peer certificate verification behavior.
+                        Accepted values are: 'never', 'allow', 'try', 'demand' (the default).
+                tls_cert_file - path to certificate file.
+                tls_key_file - path to certificate key file.
+                tls_ca_cert_file - path to CA certificate file.
+                tls_ca_cert_dir - path to the directory containing CA certificates.
+                tls_cipher_suite - allowed cipher suite.
+             Example:
+                <my_ldap_server>
+                    <host>localhost</host>
+                    <port>636</port>
+                    <auth_dn_prefix>uid=</auth_dn_prefix>
+                    <auth_dn_suffix>,ou=users,dc=example,dc=com</auth_dn_suffix>
+                    <enable_tls>yes</enable_tls>
+                    <tls_minimum_protocol_version>tls1.2</tls_minimum_protocol_version>
+                    <tls_require_cert>demand</tls_require_cert>
+                    <tls_cert_file>/path/to/tls_cert_file</tls_cert_file>
+                    <tls_key_file>/path/to/tls_key_file</tls_key_file>
+                    <tls_ca_cert_file>/path/to/tls_ca_cert_file</tls_ca_cert_file>
+                    <tls_ca_cert_dir>/path/to/tls_ca_cert_dir</tls_ca_cert_dir>
+                    <tls_cipher_suite>ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-RSA-AES256-GCM-SHA384:AES256-GCM-SHA384</tls_cipher_suite>
+                </my_ldap_server>
+        -->
+    </ldap_servers>
+
    <!-- Path to configuration file with users, access rights, profiles of settings, quotas. -->
    <users_config>users.xml</users_config>

--- a/programs/server/users.xml
+++ b/programs/server/users.xml
@ -44,6 +44,9 @@
                 If you want to specify double SHA1, place it in 'password_double_sha1_hex' element.
                 Example: <password_double_sha1_hex>e395796d6546b1b65db9d665cd43f0e858dd4303</password_double_sha1_hex>

+                 If you want to specify a previously defined LDAP server (see 'ldap_servers' in main config) for authentication, place its name in 'server' element inside 'ldap' element.
+                 Example: <ldap><server>my_ldap_server</server></ldap>
+
                 How to generate decent password:
                 Execute: PASSWORD=$(base64 < /dev/urandom | head -c8); echo "$PASSWORD"; echo -n "$PASSWORD" | sha256sum | tr -d '-'
                 In first line will be password and in second - corresponding SHA256.
--- a/src/Access/AccessControlManager.cpp
+++ b/src/Access/AccessControlManager.cpp
@ -9,6 +9,7 @@
 #include <Access/QuotaCache.h>
 #include <Access/QuotaUsage.h>
 #include <Access/SettingsProfilesCache.h>
+#include <Access/ExternalAuthenticators.h>
 #include <Core/Settings.h>
 #include <Poco/ExpireCache.h>
 #include <mutex>
@ -64,7 +65,8 @@ AccessControlManager::AccessControlManager()
      role_cache(std::make_unique<RoleCache>(*this)),
      row_policy_cache(std::make_unique<RowPolicyCache>(*this)),
      quota_cache(std::make_unique<QuotaCache>(*this)),
-      settings_profiles_cache(std::make_unique<SettingsProfilesCache>(*this))
+      settings_profiles_cache(std::make_unique<SettingsProfilesCache>(*this)),
+      external_authenticators(std::make_unique<ExternalAuthenticators>())
 {
 }

@ -79,6 +81,12 @@ void AccessControlManager::setLocalDirectory(const String & directory_path)
 }


+void AccessControlManager::setExternalAuthenticatorsConfig(const Poco::Util::AbstractConfiguration & config)
+{
+    external_authenticators->setConfig(config, getLogger());
+}
+
+
 void AccessControlManager::setUsersConfig(const Poco::Util::AbstractConfiguration & users_config)
 {
    auto & users_config_access_storage = dynamic_cast<UsersConfigAccessStorage &>(getStorageByIndex(USERS_CONFIG_ACCESS_STORAGE_INDEX));
@ -163,4 +171,9 @@ std::shared_ptr<const SettingsChanges> AccessControlManager::getProfileSettings(
    return settings_profiles_cache->getProfileSettings(profile_name);
 }

+const ExternalAuthenticators & AccessControlManager::getExternalAuthenticators() const
+{
+    return *external_authenticators;
+}
+
 }
--- a/src/Access/AccessControlManager.h
+++ b/src/Access/AccessControlManager.h
@ -37,6 +37,7 @@ class EnabledSettings;
 class SettingsProfilesCache;
 class SettingsProfileElements;
 class ClientInfo;
+class ExternalAuthenticators;
 struct Settings;


@ -48,6 +49,7 @@ public:
    ~AccessControlManager();

    void setLocalDirectory(const String & directory);
+    void setExternalAuthenticatorsConfig(const Poco::Util::AbstractConfiguration & config);
    void setUsersConfig(const Poco::Util::AbstractConfiguration & users_config);
    void setDefaultProfileName(const String & default_profile_name);

@ -85,6 +87,8 @@ public:

    std::shared_ptr<const SettingsChanges> getProfileSettings(const String & profile_name) const;

+    const ExternalAuthenticators & getExternalAuthenticators() const;
+
 private:
    class ContextAccessCache;
    std::unique_ptr<ContextAccessCache> context_access_cache;
@ -92,6 +96,7 @@ private:
    std::unique_ptr<RowPolicyCache> row_policy_cache;
    std::unique_ptr<QuotaCache> quota_cache;
    std::unique_ptr<SettingsProfilesCache> settings_profiles_cache;
+    std::unique_ptr<ExternalAuthenticators> external_authenticators;
 };

 }
--- a/src/Access/Authentication.cpp
+++ b/src/Access/Authentication.cpp
@ -1,4 +1,6 @@
 #include <Access/Authentication.h>
+#include <Access/ExternalAuthenticators.h>
+#include <Access/LDAPClient.h>
 #include <Common/Exception.h>
 #include <Poco/SHA1Engine.h>

@ -37,6 +39,9 @@ Authentication::Digest Authentication::getPasswordDoubleSHA1() const
        case DOUBLE_SHA1_PASSWORD:
            return password_hash;

+        case LDAP_SERVER:
+            throw Exception("Cannot get password double SHA1 for user with 'LDAP_SERVER' authentication.", ErrorCodes::BAD_ARGUMENTS);
+
        case MAX_TYPE:
            break;
    }
@ -44,7 +49,7 @@ Authentication::Digest Authentication::getPasswordDoubleSHA1() const
 }


-bool Authentication::isCorrectPassword(const String & password_) const
+bool Authentication::isCorrectPassword(const String & password_, const String & user_, const ExternalAuthenticators & external_authenticators) const
 {
    switch (type)
    {
@ -75,6 +80,16 @@ bool Authentication::isCorrectPassword(const String & password_) const
            return encodeSHA1(first_sha1) == password_hash;
        }

+        case LDAP_SERVER:
+        {
+            auto ldap_server_params = external_authenticators.getLDAPServerParams(server_name);
+            ldap_server_params.user = user_;
+            ldap_server_params.password = password_;
+
+            LDAPSimpleAuthClient ldap_client(ldap_server_params);
+            return ldap_client.check();
+        }
+
        case MAX_TYPE:
            break;
    }
--- a/src/Access/Authentication.h
+++ b/src/Access/Authentication.h
@ -18,6 +18,7 @@ namespace ErrorCodes
    extern const int NOT_IMPLEMENTED;
 }

+class ExternalAuthenticators;

 /// Authentication type and encrypted password for checking when an user logins.
 class Authentication
@ -38,6 +39,9 @@ public:
        /// This kind of hash is used by the `mysql_native_password` authentication plugin.
        DOUBLE_SHA1_PASSWORD,

+        /// Password is checked by a [remote] LDAP server. Connection will be made at each authentication attempt.
+        LDAP_SERVER,
+
        MAX_TYPE,
    };

@ -78,8 +82,14 @@ public:
    /// Allowed to use for Type::NO_PASSWORD, Type::PLAINTEXT_PASSWORD, Type::DOUBLE_SHA1_PASSWORD.
    Digest getPasswordDoubleSHA1() const;

+    /// Sets an external authentication server name.
+    /// When authentication type is LDAP_SERVER, server name is expected to be the name of a preconfigured LDAP server.
+    const String & getServerName() const;
+    void setServerName(const String & server_name_);
+
    /// Checks if the provided password is correct. Returns false if not.
-    bool isCorrectPassword(const String & password) const;
+    /// User name and external authenticators' info are used only by some specific authentication type (e.g., LDAP_SERVER).
+    bool isCorrectPassword(const String & password_, const String & user_, const ExternalAuthenticators & external_authenticators) const;

    friend bool operator ==(const Authentication & lhs, const Authentication & rhs) { return (lhs.type == rhs.type) && (lhs.password_hash == rhs.password_hash); }
    friend bool operator !=(const Authentication & lhs, const Authentication & rhs) { return !(lhs == rhs); }
@ -93,6 +103,7 @@ private:

    Type type = Type::NO_PASSWORD;
    Digest password_hash;
+    String server_name;
 };


@ -127,6 +138,11 @@ inline const Authentication::TypeInfo & Authentication::TypeInfo::get(Type type_
            static const auto info = make_info("DOUBLE_SHA1_PASSWORD");
            return info;
        }
+        case LDAP_SERVER:
+        {
+            static const auto info = make_info("LDAP_SERVER");
+            return info;
+        }
        case MAX_TYPE: break;
    }
    throw Exception("Unknown authentication type: " + std::to_string(static_cast<int>(type_)), ErrorCodes::LOGICAL_ERROR);
@ -176,6 +192,9 @@ inline void Authentication::setPassword(const String & password_)
        case DOUBLE_SHA1_PASSWORD:
            return setPasswordHashBinary(encodeDoubleSHA1(password_));

+        case LDAP_SERVER:
+            throw Exception("Cannot specify password for the 'LDAP_SERVER' authentication type", ErrorCodes::LOGICAL_ERROR);
+
        case MAX_TYPE: break;
    }
    throw Exception("setPassword(): authentication type " + toString(type) + " not supported", ErrorCodes::NOT_IMPLEMENTED);
@ -200,6 +219,8 @@ inline void Authentication::setPasswordHashHex(const String & hash)

 inline String Authentication::getPasswordHashHex() const
 {
+    if (type == LDAP_SERVER)
+        throw Exception("Cannot get password of a user with the 'LDAP_SERVER' authentication type", ErrorCodes::LOGICAL_ERROR);
    String hex;
    hex.resize(password_hash.size() * 2);
    boost::algorithm::hex(password_hash.begin(), password_hash.end(), hex.data());
@ -242,9 +263,22 @@ inline void Authentication::setPasswordHashBinary(const Digest & hash)
            return;
        }

+        case LDAP_SERVER:
+            throw Exception("Cannot specify password for the 'LDAP_SERVER' authentication type", ErrorCodes::LOGICAL_ERROR);
+
        case MAX_TYPE: break;
    }
    throw Exception("setPasswordHashBinary(): authentication type " + toString(type) + " not supported", ErrorCodes::NOT_IMPLEMENTED);
 }

+inline const String & Authentication::getServerName() const
+{
+    return server_name;
+}
+
+inline void Authentication::setServerName(const String & server_name_)
+{
+    server_name = server_name_;
+}
+
 }
--- a/src/Access/ContextAccess.cpp
+++ b/src/Access/ContextAccess.cpp
@ -293,7 +293,7 @@ bool ContextAccess::isCorrectPassword(const String & password) const
    std::lock_guard lock{mutex};
    if (!user)
        return false;
-    return user->authentication.isCorrectPassword(password);
+    return user->authentication.isCorrectPassword(password, user_name, manager->getExternalAuthenticators());
 }

 bool ContextAccess::isClientHostAllowed() const
--- a/src/Access/ExternalAuthenticators.cpp
+++ b/src/Access/ExternalAuthenticators.cpp
@ -0,0 +1,182 @@
+#include <Access/ExternalAuthenticators.h>
+#include <Common/Exception.h>
+#include <Common/quoteString.h>
+#include <Poco/Util/AbstractConfiguration.h>
+#include <boost/algorithm/string/case_conv.hpp>
+
+
+namespace DB
+{
+
+namespace ErrorCodes
+{
+    extern const int BAD_ARGUMENTS;
+}
+
+namespace
+{
+
+auto parseLDAPServer(const Poco::Util::AbstractConfiguration & config, const String & ldap_server_name)
+{
+    if (ldap_server_name.empty())
+        throw Exception("LDAP server name cannot be empty", ErrorCodes::BAD_ARGUMENTS);
+
+    LDAPServerParams params;
+
+    const String ldap_server_config = "ldap_servers." + ldap_server_name;
+
+    const bool has_host = config.has(ldap_server_config + ".host");
+    const bool has_port = config.has(ldap_server_config + ".port");
+    const bool has_auth_dn_prefix = config.has(ldap_server_config + ".auth_dn_prefix");
+    const bool has_auth_dn_suffix = config.has(ldap_server_config + ".auth_dn_suffix");
+    const bool has_enable_tls = config.has(ldap_server_config + ".enable_tls");
+    const bool has_tls_minimum_protocol_version = config.has(ldap_server_config + ".tls_minimum_protocol_version");
+    const bool has_tls_require_cert = config.has(ldap_server_config + ".tls_require_cert");
+    const bool has_tls_cert_file = config.has(ldap_server_config + ".tls_cert_file");
+    const bool has_tls_key_file = config.has(ldap_server_config + ".tls_key_file");
+    const bool has_tls_ca_cert_file = config.has(ldap_server_config + ".tls_ca_cert_file");
+    const bool has_tls_ca_cert_dir = config.has(ldap_server_config + ".tls_ca_cert_dir");
+    const bool has_tls_cipher_suite = config.has(ldap_server_config + ".tls_cipher_suite");
+
+    if (!has_host)
+        throw Exception("Missing 'host' entry", ErrorCodes::BAD_ARGUMENTS);
+
+    params.host = config.getString(ldap_server_config + ".host");
+
+    if (params.host.empty())
+        throw Exception("Empty 'host' entry", ErrorCodes::BAD_ARGUMENTS);
+
+    if (has_auth_dn_prefix)
+        params.auth_dn_prefix = config.getString(ldap_server_config + ".auth_dn_prefix");
+
+    if (has_auth_dn_suffix)
+        params.auth_dn_suffix = config.getString(ldap_server_config + ".auth_dn_suffix");
+
+    if (has_enable_tls)
+    {
+        String enable_tls_lc_str = config.getString(ldap_server_config + ".enable_tls");
+        boost::to_lower(enable_tls_lc_str);
+
+        if (enable_tls_lc_str == "starttls")
+            params.enable_tls = LDAPServerParams::TLSEnable::YES_STARTTLS;
+        else if (config.getBool(ldap_server_config + ".enable_tls"))
+            params.enable_tls = LDAPServerParams::TLSEnable::YES;
+        else
+            params.enable_tls = LDAPServerParams::TLSEnable::NO;
+    }
+
+    if (has_tls_minimum_protocol_version)
+    {
+        String tls_minimum_protocol_version_lc_str = config.getString(ldap_server_config + ".tls_minimum_protocol_version");
+        boost::to_lower(tls_minimum_protocol_version_lc_str);
+
+        if (tls_minimum_protocol_version_lc_str == "ssl2")
+            params.tls_minimum_protocol_version = LDAPServerParams::TLSProtocolVersion::SSL2;
+        else if (tls_minimum_protocol_version_lc_str == "ssl3")
+            params.tls_minimum_protocol_version = LDAPServerParams::TLSProtocolVersion::SSL3;
+        else if (tls_minimum_protocol_version_lc_str == "tls1.0")
+            params.tls_minimum_protocol_version = LDAPServerParams::TLSProtocolVersion::TLS1_0;
+        else if (tls_minimum_protocol_version_lc_str == "tls1.1")
+            params.tls_minimum_protocol_version = LDAPServerParams::TLSProtocolVersion::TLS1_1;
+        else if (tls_minimum_protocol_version_lc_str == "tls1.2")
+            params.tls_minimum_protocol_version = LDAPServerParams::TLSProtocolVersion::TLS1_2;
+        else
+            throw Exception("Bad value for 'tls_minimum_protocol_version' entry, allowed values are: 'ssl2', 'ssl3', 'tls1.0', 'tls1.1', 'tls1.2'", ErrorCodes::BAD_ARGUMENTS);
+    }
+
+    if (has_tls_require_cert)
+    {
+        String tls_require_cert_lc_str = config.getString(ldap_server_config + ".tls_require_cert");
+        boost::to_lower(tls_require_cert_lc_str);
+
+        if (tls_require_cert_lc_str == "never")
+            params.tls_require_cert = LDAPServerParams::TLSRequireCert::NEVER;
+        else if (tls_require_cert_lc_str == "allow")
+            params.tls_require_cert = LDAPServerParams::TLSRequireCert::ALLOW;
+        else if (tls_require_cert_lc_str == "try")
+            params.tls_require_cert = LDAPServerParams::TLSRequireCert::TRY;
+        else if (tls_require_cert_lc_str == "demand")
+            params.tls_require_cert = LDAPServerParams::TLSRequireCert::DEMAND;
+        else
+            throw Exception("Bad value for 'tls_require_cert' entry, allowed values are: 'never', 'allow', 'try', 'demand'", ErrorCodes::BAD_ARGUMENTS);
+    }
+
+    if (has_tls_cert_file)
+        params.tls_cert_file = config.getString(ldap_server_config + ".tls_cert_file");
+
+    if (has_tls_key_file)
+        params.tls_key_file = config.getString(ldap_server_config + ".tls_key_file");
+
+    if (has_tls_ca_cert_file)
+        params.tls_ca_cert_file = config.getString(ldap_server_config + ".tls_ca_cert_file");
+
+    if (has_tls_ca_cert_dir)
+        params.tls_ca_cert_dir = config.getString(ldap_server_config + ".tls_ca_cert_dir");
+
+    if (has_tls_cipher_suite)
+        params.tls_cipher_suite = config.getString(ldap_server_config + ".tls_cipher_suite");
+
+    if (has_port)
+    {
+        const auto port = config.getInt64(ldap_server_config + ".port");
+        if (port < 0 || port > 65535)
+            throw Exception("Bad value for 'port' entry", ErrorCodes::BAD_ARGUMENTS);
+
+        params.port = port;
+    }
+    else
+        params.port = (params.enable_tls == LDAPServerParams::TLSEnable::YES ? 636 : 389);
+
+    return params;
+}
+
+void parseAndAddLDAPServers(ExternalAuthenticators & external_authenticators, const Poco::Util::AbstractConfiguration & config, Poco::Logger * log)
+{
+    Poco::Util::AbstractConfiguration::Keys ldap_server_names;
+    config.keys("ldap_servers", ldap_server_names);
+
+    for (const auto & ldap_server_name : ldap_server_names)
+    {
+        try
+        {
+            external_authenticators.setLDAPServerParams(ldap_server_name, parseLDAPServer(config, ldap_server_name));
+        }
+        catch (...)
+        {
+            tryLogCurrentException(log, "Could not parse LDAP server " + backQuote(ldap_server_name));
+        }
+    }
+}
+
+}
+
+void ExternalAuthenticators::reset()
+{
+    std::scoped_lock lock(mutex);
+    ldap_server_params.clear();
+}
+
+void ExternalAuthenticators::setConfig(const Poco::Util::AbstractConfiguration & config, Poco::Logger * log)
+{
+    std::scoped_lock lock(mutex);
+    reset();
+    parseAndAddLDAPServers(*this, config, log);
+}
+
+void ExternalAuthenticators::setLDAPServerParams(const String & server, const LDAPServerParams & params)
+{
+    std::scoped_lock lock(mutex);
+    ldap_server_params.erase(server);
+    ldap_server_params[server] = params;
+}
+
+LDAPServerParams ExternalAuthenticators::getLDAPServerParams(const String & server) const
+{
+    std::scoped_lock lock(mutex);
+    auto it = ldap_server_params.find(server);
+    if (it == ldap_server_params.end())
+        throw Exception("LDAP server '" + server + "' is not configured", ErrorCodes::BAD_ARGUMENTS);
+    return it->second;
+}
+
+}
--- a/src/Access/ExternalAuthenticators.h
+++ b/src/Access/ExternalAuthenticators.h
@ -0,0 +1,39 @@
+#pragma once
+
+#include <Access/LDAPParams.h>
+#include <Core/Types.h>
+
+#include <map>
+#include <memory>
+#include <mutex>
+
+
+namespace Poco
+{
+    class Logger;
+
+    namespace Util
+    {
+        class AbstractConfiguration;
+    }
+}
+
+
+namespace DB
+{
+
+class ExternalAuthenticators
+{
+public:
+    void reset();
+    void setConfig(const Poco::Util::AbstractConfiguration & config, Poco::Logger * log);
+
+    void setLDAPServerParams(const String & server, const LDAPServerParams & params);
+    LDAPServerParams getLDAPServerParams(const String & server) const;
+
+private:
+    mutable std::recursive_mutex mutex;
+    std::map<String, LDAPServerParams> ldap_server_params;
+};
+
+}
--- a/src/Access/LDAPClient.cpp
+++ b/src/Access/LDAPClient.cpp
@ -0,0 +1,331 @@
+#include <Access/LDAPClient.h>
+#include <Common/Exception.h>
+#include <ext/scope_guard.h>
+
+#include <cstring>
+
+#include <sys/time.h>
+
+
+namespace DB
+{
+
+namespace ErrorCodes
+{
+    extern const int BAD_ARGUMENTS;
+    extern const int FEATURE_IS_NOT_ENABLED_AT_BUILD_TIME;
+    extern const int LDAP_ERROR;
+}
+
+LDAPClient::LDAPClient(const LDAPServerParams & params_)
+    : params(params_)
+{
+}
+
+LDAPClient::~LDAPClient()
+{
+    closeConnection();
+}
+
+void LDAPClient::openConnection()
+{
+    const bool graceful_bind_failure = false;
+    diag(openConnection(graceful_bind_failure));
+}
+
+#if USE_LDAP
+
+namespace
+{
+    auto escapeForLDAP(const String & src)
+    {
+        String dest;
+        dest.reserve(src.size() * 2);
+
+        for (auto ch : src)
+        {
+            switch (ch)
+            {
+                case ',':
+                case '\\':
+                case '#':
+                case '+':
+                case '<':
+                case '>':
+                case ';':
+                case '"':
+                case '=':
+                    dest += '\\';
+                    break;
+            }
+            dest += ch;
+        }
+
+        return dest;
+    }
+}
+
+void LDAPClient::diag(const int rc)
+{
+    if (rc != LDAP_SUCCESS)
+    {
+        String text;
+        const char * raw_err_str = ldap_err2string(rc);
+
+        if (raw_err_str)
+            text = raw_err_str;
+
+        if (handle)
+        {
+            String message;
+            char * raw_message = nullptr;
+            ldap_get_option(handle, LDAP_OPT_DIAGNOSTIC_MESSAGE, &raw_message);
+
+            if (raw_message)
+            {
+                message = raw_message;
+                ldap_memfree(raw_message);
+                raw_message = nullptr;
+            }
+
+            if (!message.empty())
+            {
+                if (!text.empty())
+                    text += ": ";
+                text += message;
+            }
+        }
+
+        throw Exception(text, ErrorCodes::LDAP_ERROR);
+    }
+}
+
+int LDAPClient::openConnection(const bool graceful_bind_failure)
+{
+    closeConnection();
+
+    {
+        LDAPURLDesc url;
+        std::memset(&url, 0, sizeof(url));
+
+        url.lud_scheme = const_cast<char *>(params.enable_tls == LDAPServerParams::TLSEnable::YES ? "ldaps" : "ldap");
+        url.lud_host = const_cast<char *>(params.host.c_str());
+        url.lud_port = params.port;
+        url.lud_scope = LDAP_SCOPE_DEFAULT;
+
+        auto * uri = ldap_url_desc2str(&url);
+        if (!uri)
+            throw Exception("ldap_url_desc2str() failed", ErrorCodes::LDAP_ERROR);
+
+        SCOPE_EXIT({ ldap_memfree(uri); });
+
+        diag(ldap_initialize(&handle, uri));
+        if (!handle)
+            throw Exception("ldap_initialize() failed", ErrorCodes::LDAP_ERROR);
+    }
+
+    {
+        int value = 0;
+        switch (params.protocol_version)
+        {
+            case LDAPServerParams::ProtocolVersion::V2: value = LDAP_VERSION2; break;
+            case LDAPServerParams::ProtocolVersion::V3: value = LDAP_VERSION3; break;
+        }
+        diag(ldap_set_option(handle, LDAP_OPT_PROTOCOL_VERSION, &value));
+    }
+
+    diag(ldap_set_option(handle, LDAP_OPT_RESTART, LDAP_OPT_ON));
+
+#ifdef LDAP_OPT_KEEPCONN
+    diag(ldap_set_option(handle, LDAP_OPT_KEEPCONN, LDAP_OPT_ON));
+#endif
+
+#ifdef LDAP_OPT_TIMEOUT
+    {
+        ::timeval operation_timeout;
+        operation_timeout.tv_sec = params.operation_timeout.count();
+        operation_timeout.tv_usec = 0;
+        diag(ldap_set_option(handle, LDAP_OPT_TIMEOUT, &operation_timeout));
+    }
+#endif
+
+#ifdef LDAP_OPT_NETWORK_TIMEOUT
+    {
+        ::timeval network_timeout;
+        network_timeout.tv_sec = params.network_timeout.count();
+        network_timeout.tv_usec = 0;
+        diag(ldap_set_option(handle, LDAP_OPT_NETWORK_TIMEOUT, &network_timeout));
+    }
+#endif
+
+    {
+        const int search_timeout = params.search_timeout.count();
+        diag(ldap_set_option(handle, LDAP_OPT_TIMELIMIT, &search_timeout));
+    }
+
+    {
+        const int size_limit = params.search_limit;
+        diag(ldap_set_option(handle, LDAP_OPT_SIZELIMIT, &size_limit));
+    }
+
+#ifdef LDAP_OPT_X_TLS_PROTOCOL_MIN
+    {
+        int value = 0;
+        switch (params.tls_minimum_protocol_version)
+        {
+            case LDAPServerParams::TLSProtocolVersion::SSL2:   value = LDAP_OPT_X_TLS_PROTOCOL_SSL2;   break;
+            case LDAPServerParams::TLSProtocolVersion::SSL3:   value = LDAP_OPT_X_TLS_PROTOCOL_SSL3;   break;
+            case LDAPServerParams::TLSProtocolVersion::TLS1_0: value = LDAP_OPT_X_TLS_PROTOCOL_TLS1_0; break;
+            case LDAPServerParams::TLSProtocolVersion::TLS1_1: value = LDAP_OPT_X_TLS_PROTOCOL_TLS1_1; break;
+            case LDAPServerParams::TLSProtocolVersion::TLS1_2: value = LDAP_OPT_X_TLS_PROTOCOL_TLS1_2; break;
+        }
+        diag(ldap_set_option(handle, LDAP_OPT_X_TLS_PROTOCOL_MIN, &value));
+    }
+#endif
+
+#ifdef LDAP_OPT_X_TLS_REQUIRE_CERT
+    {
+        int value = 0;
+        switch (params.tls_require_cert)
+        {
+            case LDAPServerParams::TLSRequireCert::NEVER:  value = LDAP_OPT_X_TLS_NEVER;  break;
+            case LDAPServerParams::TLSRequireCert::ALLOW:  value = LDAP_OPT_X_TLS_ALLOW;  break;
+            case LDAPServerParams::TLSRequireCert::TRY:    value = LDAP_OPT_X_TLS_TRY;    break;
+            case LDAPServerParams::TLSRequireCert::DEMAND: value = LDAP_OPT_X_TLS_DEMAND; break;
+        }
+        diag(ldap_set_option(handle, LDAP_OPT_X_TLS_REQUIRE_CERT, &value));
+    }
+#endif
+
+#ifdef LDAP_OPT_X_TLS_CERTFILE
+    if (!params.tls_cert_file.empty())
+        diag(ldap_set_option(handle, LDAP_OPT_X_TLS_CERTFILE, params.tls_cert_file.c_str()));
+#endif
+
+#ifdef LDAP_OPT_X_TLS_KEYFILE
+    if (!params.tls_key_file.empty())
+        diag(ldap_set_option(handle, LDAP_OPT_X_TLS_KEYFILE, params.tls_key_file.c_str()));
+#endif
+
+#ifdef LDAP_OPT_X_TLS_CACERTFILE
+    if (!params.tls_ca_cert_file.empty())
+        diag(ldap_set_option(handle, LDAP_OPT_X_TLS_CACERTFILE, params.tls_ca_cert_file.c_str()));
+#endif
+
+#ifdef LDAP_OPT_X_TLS_CACERTDIR
+    if (!params.tls_ca_cert_dir.empty())
+        diag(ldap_set_option(handle, LDAP_OPT_X_TLS_CACERTDIR, params.tls_ca_cert_dir.c_str()));
+#endif
+
+#ifdef LDAP_OPT_X_TLS_CIPHER_SUITE
+    if (!params.tls_cipher_suite.empty())
+        diag(ldap_set_option(handle, LDAP_OPT_X_TLS_CIPHER_SUITE, params.tls_cipher_suite.c_str()));
+#endif
+
+#ifdef LDAP_OPT_X_TLS_NEWCTX
+    {
+        const int i_am_a_server = 0;
+        diag(ldap_set_option(handle, LDAP_OPT_X_TLS_NEWCTX, &i_am_a_server));
+    }
+#endif
+
+    if (params.enable_tls == LDAPServerParams::TLSEnable::YES_STARTTLS)
+        diag(ldap_start_tls_s(handle, nullptr, nullptr));
+
+    int rc = LDAP_OTHER;
+
+    switch (params.sasl_mechanism)
+    {
+        case LDAPServerParams::SASLMechanism::SIMPLE:
+        {
+            const String dn = params.auth_dn_prefix + escapeForLDAP(params.user) + params.auth_dn_suffix;
+
+            ::berval cred;
+            cred.bv_val = const_cast<char *>(params.password.c_str());
+            cred.bv_len = params.password.size();
+
+            rc = ldap_sasl_bind_s(handle, dn.c_str(), LDAP_SASL_SIMPLE, &cred, nullptr, nullptr, nullptr);
+
+            if (!graceful_bind_failure)
+                diag(rc);
+
+            break;
+        }
+    }
+
+    return rc;
+}
+
+void LDAPClient::closeConnection() noexcept
+{
+    if (!handle)
+        return;
+
+    ldap_unbind_ext_s(handle, nullptr, nullptr);
+    handle = nullptr;
+}
+
+bool LDAPSimpleAuthClient::check()
+{
+    if (params.user.empty())
+        throw Exception("LDAP authentication of a user with an empty name is not allowed", ErrorCodes::BAD_ARGUMENTS);
+
+    if (params.password.empty())
+        return false; // Silently reject authentication attempt if the password is empty as if it didn't match.
+
+    SCOPE_EXIT({ closeConnection(); });
+
+    const bool graceful_bind_failure = true;
+    const auto rc = openConnection(graceful_bind_failure);
+
+    bool result = false;
+
+    switch (rc)
+    {
+        case LDAP_SUCCESS:
+        {
+            result = true;
+            break;
+        }
+
+        case LDAP_INVALID_CREDENTIALS:
+        {
+            result = false;
+            break;
+        }
+
+        default:
+        {
+            result = false;
+            diag(rc);
+            break;
+        }
+    }
+
+    return result;
+}
+
+#else // USE_LDAP
+
+void LDAPClient::diag(const int)
+{
+    throw Exception("ClickHouse was built without LDAP support", ErrorCodes::FEATURE_IS_NOT_ENABLED_AT_BUILD_TIME);
+}
+
+int LDAPClient::openConnection(const bool)
+{
+    throw Exception("ClickHouse was built without LDAP support", ErrorCodes::FEATURE_IS_NOT_ENABLED_AT_BUILD_TIME);
+}
+
+void LDAPClient::closeConnection() noexcept
+{
+}
+
+bool LDAPSimpleAuthClient::check()
+{
+    throw Exception("ClickHouse was built without LDAP support", ErrorCodes::FEATURE_IS_NOT_ENABLED_AT_BUILD_TIME);
+}
+
+#endif // USE_LDAP
+
+}
--- a/src/Access/LDAPClient.h
+++ b/src/Access/LDAPClient.h
@ -0,0 +1,55 @@
+#pragma once
+
+#if !defined(ARCADIA_BUILD)
+#   include "config_core.h"
+#endif
+
+#include <Access/LDAPParams.h>
+#include <Core/Types.h>
+
+#if USE_LDAP
+#   include <ldap.h>
+#   define MAYBE_NORETURN
+#else
+#   define MAYBE_NORETURN [[noreturn]]
+#endif
+
+
+namespace DB
+{
+
+class LDAPClient
+{
+public:
+    explicit LDAPClient(const LDAPServerParams & params_);
+    ~LDAPClient();
+
+    LDAPClient(const LDAPClient &) = delete;
+    LDAPClient(LDAPClient &&) = delete;
+    LDAPClient & operator= (const LDAPClient &) = delete;
+    LDAPClient & operator= (LDAPClient &&) = delete;
+
+protected:
+    MAYBE_NORETURN void diag(const int rc);
+    MAYBE_NORETURN void openConnection();
+    int openConnection(const bool graceful_bind_failure = false);
+    void closeConnection() noexcept;
+
+protected:
+    const LDAPServerParams params;
+#if USE_LDAP
+    LDAP * handle = nullptr;
+#endif
+};
+
+class LDAPSimpleAuthClient
+    : private LDAPClient
+{
+public:
+    using LDAPClient::LDAPClient;
+    bool check();
+};
+
+}
+
+#undef MAYBE_NORETURN
--- a/src/Access/LDAPParams.h
+++ b/src/Access/LDAPParams.h
@ -0,0 +1,76 @@
+#pragma once
+
+#include <Core/Types.h>
+
+#include <chrono>
+
+
+namespace DB
+{
+
+struct LDAPServerParams
+{
+    enum class ProtocolVersion
+    {
+        V2,
+        V3
+    };
+
+    enum class TLSEnable
+    {
+        NO,
+        YES_STARTTLS,
+        YES
+    };
+
+    enum class TLSProtocolVersion
+    {
+        SSL2,
+        SSL3,
+        TLS1_0,
+        TLS1_1,
+        TLS1_2
+    };
+
+    enum class TLSRequireCert
+    {
+        NEVER,
+        ALLOW,
+        TRY,
+        DEMAND
+    };
+
+    enum class SASLMechanism
+    {
+        SIMPLE
+    };
+
+    ProtocolVersion protocol_version = ProtocolVersion::V3;
+
+    String host;
+    std::uint16_t port = 636;
+
+    TLSEnable enable_tls = TLSEnable::YES;
+    TLSProtocolVersion tls_minimum_protocol_version = TLSProtocolVersion::TLS1_2;
+    TLSRequireCert tls_require_cert = TLSRequireCert::DEMAND;
+    String tls_cert_file;
+    String tls_key_file;
+    String tls_ca_cert_file;
+    String tls_ca_cert_dir;
+    String tls_cipher_suite;
+
+    SASLMechanism sasl_mechanism = SASLMechanism::SIMPLE;
+
+    String auth_dn_prefix;
+    String auth_dn_suffix;
+
+    String user;
+    String password;
+
+    std::chrono::seconds operation_timeout{40};
+    std::chrono::seconds network_timeout{30};
+    std::chrono::seconds search_timeout{20};
+    std::uint32_t search_limit = 100;
+};
+
+}
--- a/src/Access/UsersConfigAccessStorage.cpp
+++ b/src/Access/UsersConfigAccessStorage.cpp
@ -56,14 +56,15 @@ namespace
        bool has_password_plaintext = config.has(user_config + ".password");
        bool has_password_sha256_hex = config.has(user_config + ".password_sha256_hex");
        bool has_password_double_sha1_hex = config.has(user_config + ".password_double_sha1_hex");
+        bool has_ldap = config.has(user_config + ".ldap");

-        size_t num_password_fields = has_no_password + has_password_plaintext + has_password_sha256_hex + has_password_double_sha1_hex;
+        size_t num_password_fields = has_no_password + has_password_plaintext + has_password_sha256_hex + has_password_double_sha1_hex + has_ldap;
        if (num_password_fields > 1)
-            throw Exception("More than one field of 'password', 'password_sha256_hex', 'password_double_sha1_hex', 'no_password' are used to specify password for user " + user_name + ". Must be only one of them.",
+            throw Exception("More than one field of 'password', 'password_sha256_hex', 'password_double_sha1_hex', 'no_password', 'ldap' are used to specify password for user " + user_name + ". Must be only one of them.",
                ErrorCodes::BAD_ARGUMENTS);

        if (num_password_fields < 1)
-            throw Exception("Either 'password' or 'password_sha256_hex' or 'password_double_sha1_hex' or 'no_password' must be specified for user " + user_name + ".", ErrorCodes::BAD_ARGUMENTS);
+            throw Exception("Either 'password' or 'password_sha256_hex' or 'password_double_sha1_hex' or 'no_password' or 'ldap' must be specified for user " + user_name + ".", ErrorCodes::BAD_ARGUMENTS);

        if (has_password_plaintext)
        {
@ -80,6 +81,19 @@ namespace
            user->authentication = Authentication{Authentication::DOUBLE_SHA1_PASSWORD};
            user->authentication.setPasswordHashHex(config.getString(user_config + ".password_double_sha1_hex"));
        }
+        else if (has_ldap)
+        {
+            bool has_ldap_server = config.has(user_config + ".ldap.server");
+            if (!has_ldap_server)
+                throw Exception("Missing mandatory 'server' in 'ldap', with LDAP server name, for user " + user_name + ".", ErrorCodes::BAD_ARGUMENTS);
+
+            const auto ldap_server_name = config.getString(user_config + ".ldap.server");
+            if (ldap_server_name.empty())
+                throw Exception("LDAP server name cannot be empty for user " + user_name + ".", ErrorCodes::BAD_ARGUMENTS);
+
+            user->authentication = Authentication{Authentication::LDAP_SERVER};
+            user->authentication.setServerName(ldap_server_name);
+        }

        const auto profile_name_config = user_config + ".profile";
        if (config.has(profile_name_config))
--- a/src/Access/ya.make
+++ b/src/Access/ya.make
@ -17,9 +17,11 @@ SRCS(
    EnabledRolesInfo.cpp
    EnabledRowPolicies.cpp
    EnabledSettings.cpp
+    ExternalAuthenticators.cpp
    GrantedRoles.cpp
    IAccessEntity.cpp
    IAccessStorage.cpp
+    LDAPClient.cpp
    MemoryAccessStorage.cpp
    MultipleAccessStorage.cpp
    Quota.cpp
--- a/src/AggregateFunctions/AggregateFunctionAvg.h
+++ b/src/AggregateFunctions/AggregateFunctionAvg.h
@ -20,6 +20,7 @@ template <typename T, typename Denominator>
 struct AggregateFunctionAvgData
 {
    using NumeratorType = T;
+    using DenominatorType = Denominator;

    T numerator = 0;
    Denominator denominator = 0;
@ -73,13 +74,21 @@ public:
    void serialize(ConstAggregateDataPtr place, WriteBuffer & buf) const override
    {
        writeBinary(this->data(place).numerator, buf);
-        writeBinary(this->data(place).denominator, buf);
+
+        if constexpr (std::is_unsigned_v<typename Data::DenominatorType>)
+            writeVarUInt(this->data(place).denominator, buf);
+        else /// Floating point denominator type can be used
+            writeBinary(this->data(place).denominator, buf);
    }

    void deserialize(AggregateDataPtr place, ReadBuffer & buf, Arena *) const override
    {
        readBinary(this->data(place).numerator, buf);
-        readBinary(this->data(place).denominator, buf);
+
+        if constexpr (std::is_unsigned_v<typename Data::DenominatorType>)
+            readVarUInt(this->data(place).denominator, buf);
+        else /// Floating point denominator type can be used
+            readBinary(this->data(place).denominator, buf);
    }

    void insertResultInto(AggregateDataPtr place, IColumn & to, Arena *) const override
--- a/src/CMakeLists.txt
+++ b/src/CMakeLists.txt
@ -332,7 +332,7 @@ if (OPENSSL_CRYPTO_LIBRARY)
 endif ()

 if (USE_LDAP)
-    dbms_target_include_directories (SYSTEM BEFORE PRIVATE ${OPENLDAP_INCLUDE_DIR})
+    dbms_target_include_directories (SYSTEM BEFORE PRIVATE ${OPENLDAP_INCLUDE_DIRS})
    dbms_target_link_libraries (PRIVATE ${OPENLDAP_LIBRARIES})
 endif ()
 dbms_target_include_directories (SYSTEM BEFORE PRIVATE ${SPARSEHASH_INCLUDE_DIR})
@ -370,7 +370,9 @@ endif()

 target_include_directories (clickhouse_common_io SYSTEM BEFORE PUBLIC ${DOUBLE_CONVERSION_INCLUDE_DIR})

-target_include_directories (clickhouse_common_io SYSTEM BEFORE PUBLIC ${MSGPACK_INCLUDE_DIR})
+if (USE_MSGPACK)
+    target_include_directories (clickhouse_common_io SYSTEM BEFORE PUBLIC ${MSGPACK_INCLUDE_DIR})
+endif()

 if (USE_ORC)
    dbms_target_link_libraries(PUBLIC ${ORC_LIBRARIES})
--- a/src/Common/ErrorCodes.cpp
+++ b/src/Common/ErrorCodes.cpp
@ -498,6 +498,7 @@ namespace ErrorCodes
    extern const int NOT_A_LEADER = 529;
    extern const int CANNOT_CONNECT_RABBITMQ = 530;
    extern const int CANNOT_FSTAT = 531;
+    extern const int LDAP_ERROR = 532;

    extern const int KEEPER_EXCEPTION = 999;
    extern const int POCO_EXCEPTION = 1000;
--- a/src/Common/FileChecker.cpp
+++ b/src/Common/FileChecker.cpp
@ -12,6 +12,12 @@
 namespace DB
 {

+namespace ErrorCodes
+{
+    extern const int UNEXPECTED_END_OF_FILE;
+}
+
+
 FileChecker::FileChecker(DiskPtr disk_, const String & file_info_path_) : disk(std::move(disk_))
 {
    setPath(file_info_path_);
@ -24,19 +30,15 @@ void FileChecker::setPath(const String & file_info_path_)
    tmp_files_info_path = parentPath(files_info_path) + "tmp_" + fileName(files_info_path);
 }

-void FileChecker::update(const String & file_path)
+void FileChecker::update(const String & full_file_path)
 {
    initialize();
-    updateImpl(file_path);
-    save();
+    map[fileName(full_file_path)] = disk->getFileSize(full_file_path);
 }

-void FileChecker::update(const Strings::const_iterator & begin, const Strings::const_iterator & end)
+void FileChecker::setEmpty(const String & full_file_path)
 {
-    initialize();
-    for (auto it = begin; it != end; ++it)
-        updateImpl(*it);
-    save();
+    map[fileName(full_file_path)] = 0;
 }

 CheckResults FileChecker::check() const
@ -73,6 +75,28 @@ CheckResults FileChecker::check() const
    return results;
 }

+void FileChecker::repair()
+{
+    for (const auto & name_size : map)
+    {
+        const String & name = name_size.first;
+        size_t expected_size = name_size.second;
+        String path = parentPath(files_info_path) + name;
+        bool exists = disk->exists(path);
+        auto real_size = exists ? disk->getFileSize(path) : 0;  /// No race condition assuming no one else is working with these files.
+
+        if (real_size < expected_size)
+            throw Exception(ErrorCodes::UNEXPECTED_END_OF_FILE, "Size of {} is less than expected. Size is {} but should be {}.",
+                path, real_size, expected_size);
+
+        if (real_size > expected_size)
+        {
+            LOG_WARNING(&Poco::Logger::get("FileChecker"), "Will truncate file {} that has size {} to size {}", path, real_size, expected_size);
+            disk->truncateFile(path, expected_size);
+        }
+    }
+}
+
 void FileChecker::initialize()
 {
    if (initialized)
@ -82,11 +106,6 @@ void FileChecker::initialize()
    initialized = true;
 }

-void FileChecker::updateImpl(const String & file_path)
-{
-    map[fileName(file_path)] = disk->getFileSize(file_path);
-}
-
 void FileChecker::save() const
 {
    {
--- a/src/Common/FileChecker.h
+++ b/src/Common/FileChecker.h
@ -14,19 +14,25 @@ class FileChecker
 public:
    FileChecker(DiskPtr disk_, const String & file_info_path_);
    void setPath(const String & file_info_path_);
-    void update(const String & file_path);
-    void update(const Strings::const_iterator & begin, const Strings::const_iterator & end);
+
+    void update(const String & full_file_path);
+    void setEmpty(const String & full_file_path);
+    void save() const;

    /// Check the files whose parameters are specified in sizes.json
    CheckResults check() const;

+    /// Truncate files that have excessive size to the expected size.
+    /// Throw exception if the file size is less than expected.
+    /// The purpose of this function is to rollback a group of unfinished writes.
+    void repair();
+
 private:
    /// File name -> size.
    using Map = std::map<String, UInt64>;

    void initialize();
    void updateImpl(const String & file_path);
-    void save() const;
    void load(Map & local_map, const String & path) const;

    DiskPtr disk;
--- a/src/Common/MemoryStatisticsOS.cpp
+++ b/src/Common/MemoryStatisticsOS.cpp
@ -1,3 +1,5 @@
+#if defined(OS_LINUX)
+
 #include <sys/types.h>
 #include <sys/stat.h>
 #include <fcntl.h>
@ -101,3 +103,5 @@ MemoryStatisticsOS::Data MemoryStatisticsOS::get() const
 }

 }
+
+#endif
--- a/src/Common/MemoryStatisticsOS.h
+++ b/src/Common/MemoryStatisticsOS.h
@ -1,4 +1,5 @@
 #pragma once
+#if defined(OS_LINUX)
 #include <cstdint>


@ -38,3 +39,5 @@ private:
 };

 }
+
+#endif
--- a/src/Common/ProfileEvents.cpp
+++ b/src/Common/ProfileEvents.cpp
@ -212,6 +212,21 @@
    M(NotCreatedLogEntryForMerge, "Log entry to merge parts in ReplicatedMergeTree is not created due to concurrent log update by another replica.") \
    M(CreatedLogEntryForMutation, "Successfully created log entry to mutate parts in ReplicatedMergeTree.") \
    M(NotCreatedLogEntryForMutation, "Log entry to mutate parts in ReplicatedMergeTree is not created due to concurrent log update by another replica.") \
+    \
+    M(S3ReadMicroseconds, "Time of GET and HEAD requests to S3 storage.") \
+    M(S3ReadBytes, "Read bytes (incoming) in GET and HEAD requests to S3 storage.") \
+    M(S3ReadRequestsCount, "Number of GET and HEAD requests to S3 storage.") \
+    M(S3ReadRequestsErrors, "Number of non-throttling errors in GET and HEAD requests to S3 storage.") \
+    M(S3ReadRequestsThrottling, "Number of 429 and 503 errors in GET and HEAD requests to S3 storage.") \
+    M(S3ReadRequestsRedirects, "Number of redirects in GET and HEAD requests to S3 storage.") \
+    \
+    M(S3WriteMicroseconds, "Time of POST, DELETE, PUT and PATCH requests to S3 storage.") \
+    M(S3WriteBytes, "Write bytes (outgoing) in POST, DELETE, PUT and PATCH requests to S3 storage.") \
+    M(S3WriteRequestsCount, "Number of POST, DELETE, PUT and PATCH requests to S3 storage.") \
+    M(S3WriteRequestsErrors, "Number of non-throttling errors in POST, DELETE, PUT and PATCH requests to S3 storage.") \
+    M(S3WriteRequestsThrottling, "Number of 429 and 503 errors in POST, DELETE, PUT and PATCH requests to S3 storage.") \
+    M(S3WriteRequestsRedirects, "Number of redirects in POST, DELETE, PUT and PATCH requests to S3 storage.") \
+

 namespace ProfileEvents
 {
--- a/src/Common/ZooKeeper/TestKeeper.cpp
+++ b/src/Common/ZooKeeper/TestKeeper.cpp
@ -5,6 +5,7 @@

 #include <sstream>
 #include <iomanip>
+#include <functional>


 namespace Coordination
@ -25,11 +26,14 @@ static String baseName(const String & path)
 }


+using Undo = std::function<void()>;
+
+
 struct TestKeeperRequest : virtual Request
 {
    virtual bool isMutable() const { return false; }
    virtual ResponsePtr createResponse() const = 0;
-    virtual ResponsePtr process(TestKeeper::Container & container, int64_t zxid) const = 0;
+    virtual std::pair<ResponsePtr, Undo> process(TestKeeper::Container & container, int64_t zxid) const = 0;
    virtual void processWatches(TestKeeper::Watches & /*watches*/, TestKeeper::Watches & /*list_watches*/) const {}
 };

@ -69,7 +73,7 @@ struct TestKeeperCreateRequest final : CreateRequest, TestKeeperRequest
    TestKeeperCreateRequest() = default;
    explicit TestKeeperCreateRequest(const CreateRequest & base) : CreateRequest(base) {}
    ResponsePtr createResponse() const override;
-    ResponsePtr process(TestKeeper::Container & container, int64_t zxid) const override;
+    std::pair<ResponsePtr, Undo> process(TestKeeper::Container & container, int64_t zxid) const override;

    void processWatches(TestKeeper::Watches & node_watches, TestKeeper::Watches & list_watches) const override
    {
@ -83,7 +87,7 @@ struct TestKeeperRemoveRequest final : RemoveRequest, TestKeeperRequest
    explicit TestKeeperRemoveRequest(const RemoveRequest & base) : RemoveRequest(base) {}
    bool isMutable() const override { return true; }
    ResponsePtr createResponse() const override;
-    ResponsePtr process(TestKeeper::Container & container, int64_t zxid) const override;
+    std::pair<ResponsePtr, Undo> process(TestKeeper::Container & container, int64_t zxid) const override;

    void processWatches(TestKeeper::Watches & node_watches, TestKeeper::Watches & list_watches) const override
    {
@ -94,14 +98,14 @@ struct TestKeeperRemoveRequest final : RemoveRequest, TestKeeperRequest
 struct TestKeeperExistsRequest final : ExistsRequest, TestKeeperRequest
 {
    ResponsePtr createResponse() const override;
-    ResponsePtr process(TestKeeper::Container & container, int64_t zxid) const override;
+    std::pair<ResponsePtr, Undo> process(TestKeeper::Container & container, int64_t zxid) const override;
 };

 struct TestKeeperGetRequest final : GetRequest, TestKeeperRequest
 {
    TestKeeperGetRequest() = default;
    ResponsePtr createResponse() const override;
-    ResponsePtr process(TestKeeper::Container & container, int64_t zxid) const override;
+    std::pair<ResponsePtr, Undo> process(TestKeeper::Container & container, int64_t zxid) const override;
 };

 struct TestKeeperSetRequest final : SetRequest, TestKeeperRequest
@ -110,7 +114,7 @@ struct TestKeeperSetRequest final : SetRequest, TestKeeperRequest
    explicit TestKeeperSetRequest(const SetRequest & base) : SetRequest(base) {}
    bool isMutable() const override { return true; }
    ResponsePtr createResponse() const override;
-    ResponsePtr process(TestKeeper::Container & container, int64_t zxid) const override;
+    std::pair<ResponsePtr, Undo> process(TestKeeper::Container & container, int64_t zxid) const override;

    void processWatches(TestKeeper::Watches & node_watches, TestKeeper::Watches & list_watches) const override
    {
@ -121,7 +125,7 @@ struct TestKeeperSetRequest final : SetRequest, TestKeeperRequest
 struct TestKeeperListRequest final : ListRequest, TestKeeperRequest
 {
    ResponsePtr createResponse() const override;
-    ResponsePtr process(TestKeeper::Container & container, int64_t zxid) const override;
+    std::pair<ResponsePtr, Undo> process(TestKeeper::Container & container, int64_t zxid) const override;
 };

 struct TestKeeperCheckRequest final : CheckRequest, TestKeeperRequest
@ -129,7 +133,7 @@ struct TestKeeperCheckRequest final : CheckRequest, TestKeeperRequest
    TestKeeperCheckRequest() = default;
    explicit TestKeeperCheckRequest(const CheckRequest & base) : CheckRequest(base) {}
    ResponsePtr createResponse() const override;
-    ResponsePtr process(TestKeeper::Container & container, int64_t zxid) const override;
+    std::pair<ResponsePtr, Undo> process(TestKeeper::Container & container, int64_t zxid) const override;
 };

 struct TestKeeperMultiRequest final : MultiRequest, TestKeeperRequest
@ -169,13 +173,15 @@ struct TestKeeperMultiRequest final : MultiRequest, TestKeeperRequest
    }

    ResponsePtr createResponse() const override;
-    ResponsePtr process(TestKeeper::Container & container, int64_t zxid) const override;
+    std::pair<ResponsePtr, Undo> process(TestKeeper::Container & container, int64_t zxid) const override;
 };


-ResponsePtr TestKeeperCreateRequest::process(TestKeeper::Container & container, int64_t zxid) const
+std::pair<ResponsePtr, Undo> TestKeeperCreateRequest::process(TestKeeper::Container & container, int64_t zxid) const
 {
    CreateResponse response;
+    Undo undo;
+
    if (container.count(path))
    {
        response.error = Error::ZNODEEXISTS;
@ -219,7 +225,18 @@ ResponsePtr TestKeeperCreateRequest::process(TestKeeper::Container & container,
            }

            response.path_created = path_created;
-            container.emplace(std::move(path_created), std::move(created_node));
+            container.emplace(path_created, std::move(created_node));
+
+            undo = [&container, path_created, is_sequential = is_sequential, parent_path = it->first]
+            {
+                container.erase(path_created);
+                auto & undo_parent = container.at(parent_path);
+                --undo_parent.stat.cversion;
+                --undo_parent.stat.numChildren;
+
+                if (is_sequential)
+                    --undo_parent.seq_num;
+            };

            ++it->second.stat.cversion;
            ++it->second.stat.numChildren;
@ -228,12 +245,13 @@ ResponsePtr TestKeeperCreateRequest::process(TestKeeper::Container & container,
        }
    }

-    return std::make_shared<CreateResponse>(response);
+    return { std::make_shared<CreateResponse>(response), undo };
 }

-ResponsePtr TestKeeperRemoveRequest::process(TestKeeper::Container & container, int64_t) const
+std::pair<ResponsePtr, Undo> TestKeeperRemoveRequest::process(TestKeeper::Container & container, int64_t) const
 {
    RemoveResponse response;
+    Undo undo;

    auto it = container.find(path);
    if (it == container.end())
@ -250,17 +268,26 @@ ResponsePtr TestKeeperRemoveRequest::process(TestKeeper::Container & container,
    }
    else
    {
+        auto prev_node = it->second;
        container.erase(it);
        auto & parent = container.at(parentPath(path));
        --parent.stat.numChildren;
        ++parent.stat.cversion;
        response.error = Error::ZOK;
+
+        undo = [prev_node, &container, path = path]
+        {
+            container.emplace(path, prev_node);
+            auto & undo_parent = container.at(parentPath(path));
+            ++undo_parent.stat.numChildren;
+            --undo_parent.stat.cversion;
+        };
    }

-    return std::make_shared<RemoveResponse>(response);
+    return { std::make_shared<RemoveResponse>(response), undo };
 }

-ResponsePtr TestKeeperExistsRequest::process(TestKeeper::Container & container, int64_t) const
+std::pair<ResponsePtr, Undo> TestKeeperExistsRequest::process(TestKeeper::Container & container, int64_t) const
 {
    ExistsResponse response;

@ -275,10 +302,10 @@ ResponsePtr TestKeeperExistsRequest::process(TestKeeper::Container & container,
        response.error = Error::ZNONODE;
    }

-    return std::make_shared<ExistsResponse>(response);
+    return { std::make_shared<ExistsResponse>(response), {} };
 }

-ResponsePtr TestKeeperGetRequest::process(TestKeeper::Container & container, int64_t) const
+std::pair<ResponsePtr, Undo> TestKeeperGetRequest::process(TestKeeper::Container & container, int64_t) const
 {
    GetResponse response;

@ -294,12 +321,13 @@ ResponsePtr TestKeeperGetRequest::process(TestKeeper::Container & container, int
        response.error = Error::ZOK;
    }

-    return std::make_shared<GetResponse>(response);
+    return { std::make_shared<GetResponse>(response), {} };
 }

-ResponsePtr TestKeeperSetRequest::process(TestKeeper::Container & container, int64_t zxid) const
+std::pair<ResponsePtr, Undo> TestKeeperSetRequest::process(TestKeeper::Container & container, int64_t zxid) const
 {
    SetResponse response;
+    Undo undo;

    auto it = container.find(path);
    if (it == container.end())
@ -308,6 +336,8 @@ ResponsePtr TestKeeperSetRequest::process(TestKeeper::Container & container, int
    }
    else if (version == -1 || version == it->second.stat.version)
    {
+        auto prev_node = it->second;
+
        it->second.data = data;
        ++it->second.stat.version;
        it->second.stat.mzxid = zxid;
@ -316,16 +346,22 @@ ResponsePtr TestKeeperSetRequest::process(TestKeeper::Container & container, int
        ++container.at(parentPath(path)).stat.cversion;
        response.stat = it->second.stat;
        response.error = Error::ZOK;
+
+        undo = [prev_node, &container, path = path]
+        {
+            container.at(path) = prev_node;
+            --container.at(parentPath(path)).stat.cversion;
+        };
    }
    else
    {
        response.error = Error::ZBADVERSION;
    }

-    return std::make_shared<SetResponse>(response);
+    return { std::make_shared<SetResponse>(response), undo };
 }

-ResponsePtr TestKeeperListRequest::process(TestKeeper::Container & container, int64_t) const
+std::pair<ResponsePtr, Undo> TestKeeperListRequest::process(TestKeeper::Container & container, int64_t) const
 {
    ListResponse response;

@ -344,18 +380,22 @@ ResponsePtr TestKeeperListRequest::process(TestKeeper::Container & container, in
            path_prefix += '/';

        /// Fairly inefficient.
-        for (auto child_it = container.upper_bound(path_prefix); child_it != container.end() && startsWith(child_it->first, path_prefix); ++child_it)
+        for (auto child_it = container.upper_bound(path_prefix);
+             child_it != container.end() && startsWith(child_it->first, path_prefix);
+            ++child_it)
+        {
            if (parentPath(child_it->first) == path)
                response.names.emplace_back(baseName(child_it->first));
+        }

        response.stat = it->second.stat;
        response.error = Error::ZOK;
    }

-    return std::make_shared<ListResponse>(response);
+    return { std::make_shared<ListResponse>(response), {} };
 }

-ResponsePtr TestKeeperCheckRequest::process(TestKeeper::Container & container, int64_t) const
+std::pair<ResponsePtr, Undo> TestKeeperCheckRequest::process(TestKeeper::Container & container, int64_t) const
 {
    CheckResponse response;
    auto it = container.find(path);
@ -372,38 +412,44 @@ ResponsePtr TestKeeperCheckRequest::process(TestKeeper::Container & container, i
        response.error = Error::ZOK;
    }

-    return std::make_shared<CheckResponse>(response);
+    return { std::make_shared<CheckResponse>(response), {} };
 }

-ResponsePtr TestKeeperMultiRequest::process(TestKeeper::Container & container, int64_t zxid) const
+std::pair<ResponsePtr, Undo> TestKeeperMultiRequest::process(TestKeeper::Container & container, int64_t zxid) const
 {
    MultiResponse response;
    response.responses.reserve(requests.size());
-
-    /// Fairly inefficient.
-    auto container_copy = container;
+    std::vector<Undo> undo_actions;

    try
    {
        for (const auto & request : requests)
        {
            const TestKeeperRequest & concrete_request = dynamic_cast<const TestKeeperRequest &>(*request);
-            auto cur_response = concrete_request.process(container, zxid);
+            auto [ cur_response, undo_action ] = concrete_request.process(container, zxid);
            response.responses.emplace_back(cur_response);
            if (cur_response->error != Error::ZOK)
            {
                response.error = cur_response->error;
-                container = container_copy;
-                return std::make_shared<MultiResponse>(response);
+
+                for (auto it = undo_actions.rbegin(); it != undo_actions.rend(); ++it)
+                    if (*it)
+                        (*it)();
+
+                return { std::make_shared<MultiResponse>(response), {} };
            }
+            else
+                undo_actions.emplace_back(std::move(undo_action));
        }

        response.error = Error::ZOK;
-        return std::make_shared<MultiResponse>(response);
+        return { std::make_shared<MultiResponse>(response), {} };
    }
    catch (...)
    {
-        container = container_copy;
+        for (auto it = undo_actions.rbegin(); it != undo_actions.rend(); ++it)
+            if (*it)
+                (*it)();
        throw;
    }
 }
@ -476,7 +522,7 @@ void TestKeeper::processingThread()
                ++zxid;

                info.request->addRootPath(root_path);
-                ResponsePtr response = info.request->process(container, zxid);
+                auto [response, _] = info.request->process(container, zxid);
                if (response->error == Error::ZOK)
                    info.request->processWatches(watches, list_watches);

--- a/src/Core/Settings.h
+++ b/src/Core/Settings.h
@ -372,6 +372,7 @@ struct Settings : public SettingsCollection<Settings>
    M(SettingBool, optimize_duplicate_order_by_and_distinct, true, "Remove duplicate ORDER BY and DISTINCT if it's possible", 0) \
    M(SettingBool, optimize_redundant_functions_in_order_by, true, "Remove functions from ORDER BY if its argument is also in ORDER BY", 0) \
    M(SettingBool, optimize_if_chain_to_multiif, false, "Replace if(cond1, then1, if(cond2, ...)) chains to multiIf. Currently it's not beneficial for numeric types.", 0) \
+    M(SettingBool, optimize_monotonous_functions_in_order_by, true, "Replace monotonous function with its argument in ORDER BY", 0) \
    M(SettingBool, allow_experimental_alter_materialized_view_structure, false, "Allow atomic alter on Materialized views. Work in progress.", 0) \
    M(SettingBool, enable_early_constant_folding, true, "Enable query optimization where we analyze function and subqueries results and rewrite query if there're constants there", 0) \
    \
--- a/src/Core/config_core.h.in
+++ b/src/Core/config_core.h.in
@ -10,3 +10,4 @@
 #cmakedefine01 USE_INTERNAL_LLVM_LIBRARY
 #cmakedefine01 USE_SSL
 #cmakedefine01 USE_OPENCL
+#cmakedefine01 USE_LDAP
--- a/src/Dictionaries/SSDCacheDictionary.cpp
+++ b/src/Dictionaries/SSDCacheDictionary.cpp
@ -1,4 +1,4 @@
-#if defined(__linux__) || defined(__FreeBSD__)
+#if defined(OS_LINUX) || defined(__FreeBSD__)

 #include "SSDCacheDictionary.h"

--- a/src/Dictionaries/SSDComplexKeyCacheDictionary.cpp
+++ b/src/Dictionaries/SSDComplexKeyCacheDictionary.cpp
@ -1,4 +1,4 @@
-#if defined(__linux__) || defined(__FreeBSD__)
+#if defined(OS_LINUX) || defined(__FreeBSD__)

 #include "SSDComplexKeyCacheDictionary.h"

--- a/src/Dictionaries/SSDComplexKeyCacheDictionary.h
+++ b/src/Dictionaries/SSDComplexKeyCacheDictionary.h
@ -1,6 +1,6 @@
 #pragma once

-#if defined(__linux__) || defined(__FreeBSD__)
+#if defined(OS_LINUX) || defined(__FreeBSD__)

 #include "DictionaryStructure.h"
 #include "IDictionary.h"
--- a/src/Dictionaries/registerDictionaries.cpp
+++ b/src/Dictionaries/registerDictionaries.cpp
@ -33,7 +33,7 @@ void registerDictionaries()
        registerDictionaryFlat(factory);
        registerDictionaryHashed(factory);
        registerDictionaryCache(factory);
-#if defined(__linux__) || defined(__FreeBSD__)
+#if defined(OS_LINUX) || defined(__FreeBSD__)
        registerDictionarySSDCache(factory);
        registerDictionarySSDComplexKeyCache(factory);
 #endif
--- a/src/Disks/DiskLocal.cpp
+++ b/src/Disks/DiskLocal.cpp
@ -19,6 +19,7 @@ namespace ErrorCodes
    extern const int EXCESSIVE_ELEMENT_IN_CONFIG;
    extern const int PATH_ACCESS_DENIED;
    extern const int INCORRECT_DISK_INDEX;
+    extern const int CANNOT_TRUNCATE_FILE;
 }

 std::mutex DiskLocal::reservation_mutex;
@ -261,6 +262,13 @@ void DiskLocal::createHardLink(const String & src_path, const String & dst_path)
    DB::createHardLink(disk_path + src_path, disk_path + dst_path);
 }

+void DiskLocal::truncateFile(const String & path, size_t size)
+{
+    int res = truncate((disk_path + path).c_str(), size);
+    if (-1 == res)
+        throwFromErrnoWithPath("Cannot truncate file " + path, path, ErrorCodes::CANNOT_TRUNCATE_FILE);
+}
+
 void DiskLocal::createFile(const String & path)
 {
    Poco::File(disk_path + path).createFile();
--- a/src/Disks/DiskLocal.h
+++ b/src/Disks/DiskLocal.h
@ -99,6 +99,8 @@ public:

    void createHardLink(const String & src_path, const String & dst_path) override;

+    void truncateFile(const String & path, size_t size) override;
+
    const String getType() const override { return "local"; }

 private:
--- a/src/Disks/DiskMemory.cpp
+++ b/src/Disks/DiskMemory.cpp
@ -408,6 +408,17 @@ void DiskMemory::setReadOnly(const String &)
    throw Exception("Method setReadOnly is not implemented for memory disks", ErrorCodes::NOT_IMPLEMENTED);
 }

+void DiskMemory::truncateFile(const String & path, size_t size)
+{
+    std::lock_guard lock(mutex);
+
+    auto file_it = files.find(path);
+    if (file_it == files.end())
+        throw Exception("File '" + path + "' doesn't exist", ErrorCodes::FILE_DOESNT_EXIST);
+
+    file_it->second.data.resize(size);
+}
+

 using DiskMemoryPtr = std::shared_ptr<DiskMemory>;

--- a/src/Disks/DiskMemory.h
+++ b/src/Disks/DiskMemory.h
@ -90,6 +90,8 @@ public:

    void createHardLink(const String & src_path, const String & dst_path) override;

+    void truncateFile(const String & path, size_t size) override;
+
    const String getType() const override { return "memory"; }

 private:
--- a/src/Disks/IDisk.cpp
+++ b/src/Disks/IDisk.cpp
@ -8,6 +8,11 @@
 namespace DB
 {

+namespace ErrorCodes
+{
+    extern const int NOT_IMPLEMENTED;
+}
+
 bool IDisk::isDirectoryEmpty(const String & path)
 {
    return !iterateDirectory(path)->isValid();
@ -42,4 +47,9 @@ void IDisk::copy(const String & from_path, const std::shared_ptr<IDisk> & to_dis
    }
 }

+void IDisk::truncateFile(const String &, size_t)
+{
+    throw Exception(ErrorCodes::NOT_IMPLEMENTED, "Truncate operation is not implemented for disk of type {}", getType());
+}
+
 }
--- a/src/Disks/IDisk.h
+++ b/src/Disks/IDisk.h
@ -172,6 +172,9 @@ public:
    /// Create hardlink from `src_path` to `dst_path`.
    virtual void createHardLink(const String & src_path, const String & dst_path) = 0;

+    /// Truncate file to specified size.
+    virtual void truncateFile(const String & path, size_t size);
+
    /// Return disk type - "local", "s3", etc.
    virtual const String getType() const = 0;
 };
--- a/src/Formats/config_formats.h.in
+++ b/src/Formats/config_formats.h.in
@ -9,3 +9,5 @@
 #cmakedefine01 USE_ORC
 #cmakedefine01 USE_ARROW
 #cmakedefine01 USE_PROTOBUF
+#cmakedefine01 USE_MSGPACK
+
--- a/src/Functions/FunctionsExternalDictionaries.h
+++ b/src/Functions/FunctionsExternalDictionaries.h
@ -29,7 +29,7 @@
 #include <Dictionaries/FlatDictionary.h>
 #include <Dictionaries/HashedDictionary.h>
 #include <Dictionaries/CacheDictionary.h>
-#if defined(__linux__) || defined(__FreeBSD__)
+#if defined(OS_LINUX) || defined(__FreeBSD__)
 #include <Dictionaries/SSDCacheDictionary.h>
 #include <Dictionaries/SSDComplexKeyCacheDictionary.h>
 #endif
@ -183,13 +183,13 @@ private:
            !executeDispatchSimple<DirectDictionary>(block, arguments, result, dict) &&
            !executeDispatchSimple<HashedDictionary>(block, arguments, result, dict) &&
            !executeDispatchSimple<CacheDictionary>(block, arguments, result, dict) &&
-#if defined(__linux__) || defined(__FreeBSD__)
+#if defined(OS_LINUX) || defined(__FreeBSD__)
            !executeDispatchSimple<SSDCacheDictionary>(block, arguments, result, dict) &&
 #endif
            !executeDispatchComplex<ComplexKeyHashedDictionary>(block, arguments, result, dict) &&
            !executeDispatchComplex<ComplexKeyDirectDictionary>(block, arguments, result, dict) &&
            !executeDispatchComplex<ComplexKeyCacheDictionary>(block, arguments, result, dict) &&
-#if defined(__linux__) || defined(__FreeBSD__)
+#if defined(OS_LINUX) || defined(__FreeBSD__)
            !executeDispatchComplex<SSDComplexKeyCacheDictionary>(block, arguments, result, dict) &&
 #endif
 #if !defined(ARCADIA_BUILD)
@ -339,13 +339,13 @@ private:
            !executeDispatch<HashedDictionary>(block, arguments, result, dict) &&
            !executeDispatch<DirectDictionary>(block, arguments, result, dict) &&
            !executeDispatch<CacheDictionary>(block, arguments, result, dict) &&
-#if defined(__linux__) || defined(__FreeBSD__)
+#if defined(OS_LINUX) || defined(__FreeBSD__)
            !executeDispatch<SSDCacheDictionary>(block, arguments, result, dict) &&
 #endif
            !executeDispatchComplex<ComplexKeyHashedDictionary>(block, arguments, result, dict) &&
            !executeDispatchComplex<ComplexKeyDirectDictionary>(block, arguments, result, dict) &&
            !executeDispatchComplex<ComplexKeyCacheDictionary>(block, arguments, result, dict) &&
-#if defined(__linux__) || defined(__FreeBSD__)
+#if defined(OS_LINUX) || defined(__FreeBSD__)
            !executeDispatchComplex<SSDComplexKeyCacheDictionary>(block, arguments, result, dict) &&
 #endif
 #if !defined(ARCADIA_BUILD)
@ -523,13 +523,13 @@ private:
            !executeDispatch<HashedDictionary>(block, arguments, result, dict) &&
            !executeDispatch<DirectDictionary>(block, arguments, result, dict) &&
            !executeDispatch<CacheDictionary>(block, arguments, result, dict) &&
-#if defined(__linux__) || defined(__FreeBSD__)
+#if defined(OS_LINUX) || defined(__FreeBSD__)
            !executeDispatch<SSDCacheDictionary>(block, arguments, result, dict) &&
 #endif
            !executeDispatchComplex<ComplexKeyHashedDictionary>(block, arguments, result, dict) &&
            !executeDispatchComplex<ComplexKeyDirectDictionary>(block, arguments, result, dict) &&
            !executeDispatchComplex<ComplexKeyCacheDictionary>(block, arguments, result, dict) &&
-#if defined(__linux__) || defined(__FreeBSD__)
+#if defined(OS_LINUX) || defined(__FreeBSD__)
            !executeDispatchComplex<SSDComplexKeyCacheDictionary>(block, arguments, result, dict) &&
 #endif
 #if !defined(ARCADIA_BUILD)
@ -863,13 +863,13 @@ private:
            !executeDispatch<HashedDictionary>(block, arguments, result, dict) &&
            !executeDispatch<DirectDictionary>(block, arguments, result, dict) &&
            !executeDispatch<CacheDictionary>(block, arguments, result, dict) &&
-#if defined(__linux__) || defined(__FreeBSD__)
+#if defined(OS_LINUX) || defined(__FreeBSD__)
            !executeDispatch<SSDCacheDictionary>(block, arguments, result, dict) &&
 #endif
            !executeDispatchComplex<ComplexKeyHashedDictionary>(block, arguments, result, dict) &&
            !executeDispatchComplex<ComplexKeyDirectDictionary>(block, arguments, result, dict) &&
            !executeDispatchComplex<ComplexKeyCacheDictionary>(block, arguments, result, dict) &&
-#if defined(__linux__) || defined(__FreeBSD__)
+#if defined(OS_LINUX) || defined(__FreeBSD__)
            !executeDispatchComplex<SSDComplexKeyCacheDictionary>(block, arguments, result, dict) &&
 #endif
 #if !defined(ARCADIA_BUILD)
@ -1124,13 +1124,13 @@ private:
            !executeDispatch<HashedDictionary>(block, arguments, result, dict) &&
            !executeDispatch<DirectDictionary>(block, arguments, result, dict) &&
            !executeDispatch<CacheDictionary>(block, arguments, result, dict) &&
-#if defined(__linux__) || defined(__FreeBSD__)
+#if defined(OS_LINUX) || defined(__FreeBSD__)
            !executeDispatch<SSDCacheDictionary>(block, arguments, result, dict) &&
 #endif
            !executeDispatchComplex<ComplexKeyHashedDictionary>(block, arguments, result, dict) &&
            !executeDispatchComplex<ComplexKeyDirectDictionary>(block, arguments, result, dict) &&
            !executeDispatchComplex<ComplexKeyCacheDictionary>(block, arguments, result, dict) &&
-#if defined(__linux__) || defined(__FreeBSD__)
+#if defined(OS_LINUX) || defined(__FreeBSD__)
            !executeDispatchComplex<SSDComplexKeyCacheDictionary>(block, arguments, result, dict) &&
 #endif
 #if !defined(ARCADIA_BUILD)
--- a/src/IO/AIOContextPool.cpp
+++ b/src/IO/AIOContextPool.cpp
@ -1,4 +1,4 @@
-#if defined(__linux__) || defined(__FreeBSD__)
+#if defined(OS_LINUX) || defined(__FreeBSD__)

 #include <Common/Exception.h>
 #include <common/logger_useful.h>
--- a/src/IO/AIOContextPool.h
+++ b/src/IO/AIOContextPool.h
@ -1,6 +1,6 @@
 #pragma once

-#if defined(__linux__) || defined(__FreeBSD__)
+#if defined(OS_LINUX) || defined(__FreeBSD__)

 #include <condition_variable>
 #include <future>
--- a/src/IO/BitHelpers.h
+++ b/src/IO/BitHelpers.h
@ -7,7 +7,7 @@
 #include <cstring>
 #include <cassert>

-#if defined(__OpenBSD__) || defined(__FreeBSD__)
+#if defined(__OpenBSD__) || defined(__FreeBSD__) || defined (__ANDROID__)
 #   include <sys/endian.h>
 #elif defined(__APPLE__)
 #   include <libkern/OSByteOrder.h>
--- a/src/IO/ReadBufferAIO.cpp
+++ b/src/IO/ReadBufferAIO.cpp
@ -1,4 +1,4 @@
-#if defined(__linux__) || defined(__FreeBSD__)
+#if defined(OS_LINUX) || defined(__FreeBSD__)

 #include <IO/ReadBufferAIO.h>
 #include <IO/AIOContextPool.h>
--- a/src/IO/ReadBufferAIO.h
+++ b/src/IO/ReadBufferAIO.h
@ -1,6 +1,6 @@
 #pragma once

-#if defined(__linux__) || defined(__FreeBSD__)
+#if defined(OS_LINUX) || defined(__FreeBSD__)

 #include <IO/ReadBufferFromFileBase.h>
 #include <IO/ReadBuffer.h>
--- a/src/IO/ReadBufferFromS3.cpp
+++ b/src/IO/ReadBufferFromS3.cpp
@ -4,6 +4,7 @@

 #    include <IO/ReadBufferFromIStream.h>
 #    include <IO/ReadBufferFromS3.h>
+#    include <Common/Stopwatch.h>

 #    include <aws/s3/S3Client.h>
 #    include <aws/s3/model/GetObjectRequest.h>
@ -11,6 +12,12 @@

 #    include <utility>

+namespace ProfileEvents
+{
+    extern const Event S3ReadMicroseconds;
+    extern const Event S3ReadBytes;
+}
+
 namespace DB
 {
 namespace ErrorCodes
@ -27,6 +34,7 @@ ReadBufferFromS3::ReadBufferFromS3(
 {
 }

+
 bool ReadBufferFromS3::nextImpl()
 {
    if (!initialized)
@ -35,9 +43,17 @@ bool ReadBufferFromS3::nextImpl()
        initialized = true;
    }

-    if (!impl->next())
+    Stopwatch watch;
+    auto res = impl->next();
+    watch.stop();
+    ProfileEvents::increment(ProfileEvents::S3ReadMicroseconds, watch.elapsedMicroseconds());
+
+    if (!res)
        return false;
    internal_buffer = impl->buffer();
+
+    ProfileEvents::increment(ProfileEvents::S3ReadBytes, internal_buffer.size());
+
    working_buffer = internal_buffer;
    return true;
 }
--- a/src/IO/S3/PocoHTTPClient.cpp
+++ b/src/IO/S3/PocoHTTPClient.cpp
@ -4,6 +4,7 @@
 #include <IO/HTTPCommon.h>
 #include <IO/S3/PocoHTTPResponseStream.h>
 #include <IO/S3/PocoHTTPResponseStream.cpp>
+#include <Common/Stopwatch.h>
 #include <aws/core/http/HttpRequest.h>
 #include <aws/core/http/HttpResponse.h>
 #include <aws/core/http/standard/StandardHttpResponse.h>
@ -14,8 +15,24 @@
 #include <Poco/Net/HTTPResponse.h>
 #include <common/logger_useful.h>

+namespace ProfileEvents
+{
+    extern const Event S3ReadMicroseconds;
+    extern const Event S3ReadRequestsCount;
+    extern const Event S3ReadRequestsErrors;
+    extern const Event S3ReadRequestsThrottling;
+    extern const Event S3ReadRequestsRedirects;
+
+    extern const Event S3WriteMicroseconds;
+    extern const Event S3WriteRequestsCount;
+    extern const Event S3WriteRequestsErrors;
+    extern const Event S3WriteRequestsThrottling;
+    extern const Event S3WriteRequestsRedirects;
+}
+
 namespace DB::ErrorCodes
 {
+    extern const int NOT_IMPLEMENTED;
    extern const int TOO_MANY_REDIRECTS;
 }

@ -62,6 +79,46 @@ void PocoHTTPClient::MakeRequestInternal(
    auto uri = request.GetUri().GetURIString();
    LOG_DEBUG(log, "Make request to: {}", uri);

+    enum class S3MetricType
+    {
+        Microseconds,
+        Count,
+        Errors,
+        Throttling,
+        Redirects,
+
+        EnumSize,
+    };
+
+    auto selectMetric = [&request](S3MetricType type)
+    {
+        const ProfileEvents::Event events_map[][2] = {
+            {ProfileEvents::S3ReadMicroseconds, ProfileEvents::S3WriteMicroseconds},
+            {ProfileEvents::S3ReadRequestsCount, ProfileEvents::S3WriteRequestsCount},
+            {ProfileEvents::S3ReadRequestsErrors, ProfileEvents::S3WriteRequestsErrors},
+            {ProfileEvents::S3ReadRequestsThrottling, ProfileEvents::S3WriteRequestsThrottling},
+            {ProfileEvents::S3ReadRequestsRedirects, ProfileEvents::S3WriteRequestsRedirects},
+        };
+
+        static_assert((sizeof(events_map) / sizeof(events_map[0])) == static_cast<unsigned int>(S3MetricType::EnumSize));
+
+        switch (request.GetMethod())
+        {
+            case Aws::Http::HttpMethod::HTTP_GET:
+            case Aws::Http::HttpMethod::HTTP_HEAD:
+                return events_map[static_cast<unsigned int>(type)][0]; // Read
+            case Aws::Http::HttpMethod::HTTP_POST:
+            case Aws::Http::HttpMethod::HTTP_DELETE:
+            case Aws::Http::HttpMethod::HTTP_PUT:
+            case Aws::Http::HttpMethod::HTTP_PATCH:
+                return events_map[static_cast<unsigned int>(type)][1]; // Write
+        }
+
+        throw Exception("Unsupported request method", ErrorCodes::NOT_IMPLEMENTED);
+    };
+
+    ProfileEvents::increment(selectMetric(S3MetricType::Count));
+
    const int MAX_REDIRECT_ATTEMPTS = 10;
    try
    {
@ -112,11 +169,15 @@ void PocoHTTPClient::MakeRequestInternal(
                poco_request.set(header_name, header_value);

            Poco::Net::HTTPResponse poco_response;
+
+            Stopwatch watch;
+
            auto & request_body_stream = session->sendRequest(poco_request);

            if (request.GetContentBody())
            {
                LOG_TRACE(log, "Writing request body.");
+
                if (attempt > 0) /// rewind content body buffer.
                {
                    request.GetContentBody()->clear();
@ -129,6 +190,9 @@ void PocoHTTPClient::MakeRequestInternal(
            LOG_TRACE(log, "Receiving response...");
            auto & response_body_stream = session->receiveResponse(poco_response);

+            watch.stop();
+            ProfileEvents::increment(selectMetric(S3MetricType::Microseconds), watch.elapsedMicroseconds());
+
            int status_code = static_cast<int>(poco_response.getStatus());
            LOG_DEBUG(log, "Response status: {}, {}", status_code, poco_response.getReason());

@ -138,6 +202,8 @@ void PocoHTTPClient::MakeRequestInternal(
                uri = location;
                LOG_DEBUG(log, "Redirecting request to new location: {}", location);

+                ProfileEvents::increment(selectMetric(S3MetricType::Redirects));
+
                continue;
            }

@ -159,6 +225,15 @@ void PocoHTTPClient::MakeRequestInternal(

                response->SetClientErrorType(Aws::Client::CoreErrors::NETWORK_CONNECTION);
                response->SetClientErrorMessage(error_message);
+
+                if (status_code == 429 || status_code == 503)
+                { // API throttling
+                    ProfileEvents::increment(selectMetric(S3MetricType::Throttling));
+                }
+                else
+                {
+                    ProfileEvents::increment(selectMetric(S3MetricType::Errors));
+                }
            }
            else
                response->GetResponseStream().SetUnderlyingStream(std::make_shared<PocoHTTPResponseStream>(session, response_body_stream));
@ -173,6 +248,8 @@ void PocoHTTPClient::MakeRequestInternal(
        tryLogCurrentException(log, fmt::format("Failed to make request to: {}", uri));
        response->SetClientErrorType(Aws::Client::CoreErrors::NETWORK_CONNECTION);
        response->SetClientErrorMessage(getCurrentExceptionMessage(false));
+
+        ProfileEvents::increment(selectMetric(S3MetricType::Errors));
    }
 }
 }
--- a/src/IO/S3Common.cpp
+++ b/src/IO/S3Common.cpp
@ -22,6 +22,12 @@

 namespace
 {
+
+const char * S3_LOGGER_TAG_NAMES[][2] = {
+    {"AWSClient", "AWSClient"},
+    {"AWSAuthV4Signer", "AWSClient (AWSAuthV4Signer)"},
+};
+
 const std::pair<DB::LogsLevel, Poco::Message::Priority> & convertLogLevel(Aws::Utils::Logging::LogLevel log_level)
 {
    static const std::unordered_map<Aws::Utils::Logging::LogLevel, std::pair<DB::LogsLevel, Poco::Message::Priority>> mapping =
@ -40,26 +46,46 @@ const std::pair<DB::LogsLevel, Poco::Message::Priority> & convertLogLevel(Aws::U
 class AWSLogger final : public Aws::Utils::Logging::LogSystemInterface
 {
 public:
+    AWSLogger()
+    {
+        for (auto [tag, name] : S3_LOGGER_TAG_NAMES)
+            tag_loggers[tag] = &Poco::Logger::get(name);
+
+        default_logger = tag_loggers[S3_LOGGER_TAG_NAMES[0][0]];
+    }
+
    ~AWSLogger() final = default;

    Aws::Utils::Logging::LogLevel GetLogLevel() const final { return Aws::Utils::Logging::LogLevel::Trace; }

    void Log(Aws::Utils::Logging::LogLevel log_level, const char * tag, const char * format_str, ...) final // NOLINT
    {
-        const auto & [level, prio] = convertLogLevel(log_level);
-        LOG_IMPL(log, level, prio, "{}: {}", tag, format_str);
+        callLogImpl(log_level, tag, format_str); /// FIXME. Variadic arguments?
    }

    void LogStream(Aws::Utils::Logging::LogLevel log_level, const char * tag, const Aws::OStringStream & message_stream) final
+    {
+        callLogImpl(log_level, tag, message_stream.str().c_str());
+    }
+
+    void callLogImpl(Aws::Utils::Logging::LogLevel log_level, const char * tag, const char * message)
    {
        const auto & [level, prio] = convertLogLevel(log_level);
-        LOG_IMPL(log, level, prio, "{}: {}", tag, message_stream.str());
+        if (tag_loggers.count(tag) > 0)
+        {
+            LOG_IMPL(tag_loggers[tag], level, prio, "{}", message);
+        }
+        else
+        {
+            LOG_IMPL(default_logger, level, prio, "{}: {}", tag, message);
+        }
    }

    void Flush() final {}

 private:
-    Poco::Logger * log = &Poco::Logger::get("AWSClient");
+    Poco::Logger * default_logger;
+    std::unordered_map<String, Poco::Logger *> tag_loggers;
 };

 class S3AuthSigner : public Aws::Client::AWSAuthV4Signer
@ -102,8 +128,10 @@ public:
 private:
    const DB::HeaderCollection headers;
 };
+
 }

+
 namespace DB
 {
 namespace ErrorCodes
--- a/src/IO/WriteBufferAIO.cpp
+++ b/src/IO/WriteBufferAIO.cpp
@ -1,4 +1,4 @@
-#if defined(__linux__) || defined(__FreeBSD__)
+#if defined(OS_LINUX) || defined(__FreeBSD__)

 #include <IO/WriteBufferAIO.h>
 #include <Common/MemorySanitizer.h>
--- a/src/IO/WriteBufferAIO.h
+++ b/src/IO/WriteBufferAIO.h
@ -1,6 +1,6 @@
 #pragma once

-#if defined(__linux__) || defined(__FreeBSD__)
+#if defined(OS_LINUX) || defined(__FreeBSD__)

 #include <IO/WriteBufferFromFileBase.h>
 #include <IO/WriteBuffer.h>
--- a/src/IO/WriteBufferFromS3.cpp
+++ b/src/IO/WriteBufferFromS3.cpp
@ -17,6 +17,11 @@
 #    include <utility>


+namespace ProfileEvents
+{
+    extern const Event S3WriteBytes;
+}
+
 namespace DB
 {
 // S3 protocol does not allow to have multipart upload with more than 10000 parts.
@ -59,6 +64,8 @@ void WriteBufferFromS3::nextImpl()

    temporary_buffer->write(working_buffer.begin(), offset());

+    ProfileEvents::increment(ProfileEvents::S3WriteBytes, offset());
+
    if (is_multipart)
    {
        last_part_size += offset();
--- a/src/IO/createReadBufferFromFileBase.cpp
+++ b/src/IO/createReadBufferFromFileBase.cpp
@ -1,6 +1,6 @@
 #include <IO/createReadBufferFromFileBase.h>
 #include <IO/ReadBufferFromFile.h>
-#if defined(__linux__) || defined(__FreeBSD__)
+#if defined(OS_LINUX) || defined(__FreeBSD__)
 #include <IO/ReadBufferAIO.h>
 #endif
 #include <IO/MMapReadBufferFromFile.h>
@ -24,7 +24,7 @@ std::unique_ptr<ReadBufferFromFileBase> createReadBufferFromFileBase(
    size_t estimated_size, size_t aio_threshold, size_t mmap_threshold,
    size_t buffer_size_, int flags_, char * existing_memory_, size_t alignment)
 {
-#if defined(__linux__) || defined(__FreeBSD__)
+#if defined(OS_LINUX) || defined(__FreeBSD__)
    if (aio_threshold && estimated_size >= aio_threshold)
    {
        /// Attempt to open a file with O_DIRECT
--- a/src/IO/createWriteBufferFromFileBase.cpp
+++ b/src/IO/createWriteBufferFromFileBase.cpp
@ -1,6 +1,6 @@
 #include <IO/createWriteBufferFromFileBase.h>
 #include <IO/WriteBufferFromFile.h>
-#if defined(__linux__) || defined(__FreeBSD__)
+#if defined(OS_LINUX) || defined(__FreeBSD__)
 #include <IO/WriteBufferAIO.h>
 #endif
 #include <Common/ProfileEvents.h>
@ -20,7 +20,7 @@ std::unique_ptr<WriteBufferFromFileBase> createWriteBufferFromFileBase(const std
        size_t aio_threshold, size_t buffer_size_, int flags_, mode_t mode, char * existing_memory_,
        size_t alignment)
 {
-#if defined(__linux__) || defined(__FreeBSD__)
+#if defined(OS_LINUX) || defined(__FreeBSD__)
    if (aio_threshold && estimated_size >= aio_threshold)
    {
        /// Attempt to open a file with O_DIRECT
--- a/src/Interpreters/ActionsVisitor.cpp
+++ b/src/Interpreters/ActionsVisitor.cpp
@ -368,7 +368,7 @@ void ActionsMatcher::visit(const ASTFunction & node, const ASTPtr & ast, Data &
    }

    SetPtr prepared_set;
-    if (functionIsInOrGlobalInOperator(node.name))
+    if (checkFunctionIsInOrGlobalInOperator(node))
    {
        /// Let's find the type of the first argument (then getActionsImpl will be called again and will not affect anything).
        visit(node.arguments->children.at(0), data);
@ -445,7 +445,7 @@ void ActionsMatcher::visit(const ASTFunction & node, const ASTPtr & ast, Data &
            /// Select the name in the next cycle.
            argument_names.emplace_back();
        }
-        else if (functionIsInOrGlobalInOperator(node.name) && arg == 1 && prepared_set)
+        else if (checkFunctionIsInOrGlobalInOperator(node) && arg == 1 && prepared_set)
        {
            ColumnWithTypeAndName column;
            column.type = std::make_shared<DataTypeSet>();
--- a/src/Interpreters/Context.cpp
+++ b/src/Interpreters/Context.cpp
@ -621,6 +621,7 @@ void Context::setConfig(const ConfigurationPtr & config)
 {
    auto lock = getLock();
    shared->config = config;
+    shared->access_control_manager.setExternalAuthenticatorsConfig(*shared->config);
 }

 const Poco::Util::AbstractConfiguration & Context::getConfigRef() const
@ -640,6 +641,11 @@ const AccessControlManager & Context::getAccessControlManager() const
    return shared->access_control_manager;
 }

+void Context::setExternalAuthenticatorsConfig(const Poco::Util::AbstractConfiguration & config)
+{
+    auto lock = getLock();
+    shared->access_control_manager.setExternalAuthenticatorsConfig(config);
+}

 void Context::setUsersConfig(const ConfigurationPtr & config)
 {
--- a/src/Interpreters/Context.h
+++ b/src/Interpreters/Context.h
@ -245,6 +245,9 @@ public:
    AccessControlManager & getAccessControlManager();
    const AccessControlManager & getAccessControlManager() const;

+    /// Sets external authenticators config (LDAP).
+    void setExternalAuthenticatorsConfig(const Poco::Util::AbstractConfiguration & config);
+
    /** Take the list of users, quotas and configuration profiles from this config.
      * The list of users is completely replaced.
      * The accumulated quota values are not reset if the quota is not deleted.
--- a/src/Interpreters/ExecuteScalarSubqueriesVisitor.cpp
+++ b/src/Interpreters/ExecuteScalarSubqueriesVisitor.cpp
@ -180,7 +180,7 @@ void ExecuteScalarSubqueriesMatcher::visit(const ASTFunction & func, ASTPtr & as
    /// But if an argument is not subquery, than deeper may be scalar subqueries and we need to descend in them.

    std::vector<ASTPtr *> out;
-    if (functionIsInOrGlobalInOperator(func.name))
+    if (checkFunctionIsInOrGlobalInOperator(func))
    {
        for (auto & child : ast->children)
        {
--- a/Show More
+++ b/Show More