diff --git a/cmake/find_poco.cmake b/cmake/find_poco.cmake
index 315e27b798f..c0504b0df27 100644
--- a/cmake/find_poco.cmake
+++ b/cmake/find_poco.cmake
@@ -9,7 +9,7 @@ if (NOT EXISTS "${ClickHouse_SOURCE_DIR}/contrib/poco/CMakeLists.txt")
 endif ()
 
 if (NOT USE_INTERNAL_POCO_LIBRARY)
-    find_package (Poco COMPONENTS Net NetSSL XML Data Crypto DataODBC MongoDB)
+    find_package (Poco COMPONENTS Net NetSSL XML SQL Data Crypto DataODBC MongoDB)
 endif ()
 
 if (Poco_INCLUDE_DIRS AND Poco_Foundation_LIBRARY)
@@ -24,6 +24,15 @@ elseif (NOT MISSING_INTERNAL_POCO_LIBRARY)
     set (ENABLE_DATA_SQLITE 0 CACHE BOOL "")
     set (ENABLE_DATA_MYSQL 0 CACHE BOOL "")
     set (ENABLE_DATA_POSTGRESQL 0 CACHE BOOL "")
+    # new after 2.0.0:
+    set (POCO_ENABLE_ZIP 0 CACHE BOOL "")
+    set (POCO_ENABLE_PAGECOMPILER 0 CACHE BOOL "")
+    set (POCO_ENABLE_PAGECOMPILER_FILE2PAGE 0 CACHE BOOL "")
+    set (POCO_ENABLE_REDIS 0 CACHE BOOL "")
+    set (POCO_ENABLE_SQL_SQLITE 0 CACHE BOOL "")
+    set (POCO_ENABLE_SQL_MYSQL 0 CACHE BOOL "")
+    set (POCO_ENABLE_SQL_POSTGRESQL 0 CACHE BOOL "")
+
     set (POCO_UNBUNDLED 1 CACHE BOOL "")
     set (POCO_UNBUNDLED_PCRE 0 CACHE BOOL "")
     set (POCO_UNBUNDLED_EXPAT 0 CACHE BOOL "")
@@ -44,9 +53,25 @@ elseif (NOT MISSING_INTERNAL_POCO_LIBRARY)
     endif ()
 
     if (ODBC_FOUND)
-        set (Poco_DataODBC_FOUND 1)
-        set (Poco_DataODBC_LIBRARY PocoDataODBC ${ODBC_LIBRARIES} ${LTDL_LIBRARY})
-        set (Poco_DataODBC_INCLUDE_DIRS "${ClickHouse_SOURCE_DIR}/contrib/poco/Data/ODBC/include/")
+        if (EXISTS "${ClickHouse_SOURCE_DIR}/contrib/poco/SQL/ODBC/include/")
+            set (Poco_SQL_FOUND 1)
+            set (Poco_SQLODBC_FOUND 1)
+            set (Poco_SQL_INCLUDE_DIRS
+                "${ClickHouse_SOURCE_DIR}/contrib/poco/SQL/include"
+                "${ClickHouse_SOURCE_DIR}/contrib/poco/Data/include"
+                )
+            set (Poco_SQLODBC_INCLUDE_DIRS
+                "${ClickHouse_SOURCE_DIR}/contrib/poco/SQL/ODBC/include/"
+                "${ClickHouse_SOURCE_DIR}/contrib/poco/Data/ODBC/include/"
+                )
+            set (Poco_SQL_LIBRARY PocoSQL)
+            set (Poco_SQLODBC_LIBRARY PocoSQLODBC ${ODBC_LIBRARIES} ${LTDL_LIBRARY})
+        else ()
+            set (Poco_DataODBC_FOUND 1)
+            set (Poco_DataODBC_INCLUDE_DIRS "${ClickHouse_SOURCE_DIR}/contrib/poco/Data/ODBC/include/" "${ClickHouse_SOURCE_DIR}/contrib/poco/Data/include")
+            set (Poco_Data_LIBRARY PocoData)
+            set (Poco_DataODBC_LIBRARY PocoDataODBC ${ODBC_LIBRARIES} ${LTDL_LIBRARY})
+        endif ()
     endif ()
 
     # TODO! fix internal ssl
@@ -66,7 +91,6 @@ elseif (NOT MISSING_INTERNAL_POCO_LIBRARY)
     set (Poco_Foundation_LIBRARY PocoFoundation)
     set (Poco_Util_LIBRARY PocoUtil)
     set (Poco_Net_LIBRARY PocoNet)
-    set (Poco_Data_LIBRARY PocoData)
     set (Poco_XML_LIBRARY PocoXML)
 endif ()
 
diff --git a/dbms/CMakeLists.txt b/dbms/CMakeLists.txt
index d740ce5a45c..e45a53427cb 100644
--- a/dbms/CMakeLists.txt
+++ b/dbms/CMakeLists.txt
@@ -161,11 +161,20 @@ if (NOT USE_INTERNAL_BOOST_LIBRARY)
     target_include_directories (clickhouse_common_io BEFORE PUBLIC ${Boost_INCLUDE_DIRS})
 endif ()
 
-if (Poco_DataODBC_FOUND)
-    target_link_libraries (dbms ${Poco_DataODBC_LIBRARY})
-    target_include_directories (dbms PRIVATE ${ODBC_INCLUDE_DIRECTORIES})
+if (Poco_SQLODBC_FOUND)
+    target_link_libraries (clickhouse_common_io ${Poco_SQL_LIBRARY})
+    target_include_directories (clickhouse_common_io PRIVATE ${ODBC_INCLUDE_DIRECTORIES} ${Poco_SQL_INCLUDE_DIRS})
+    target_link_libraries (dbms ${Poco_SQLODBC_LIBRARY} ${Poco_SQL_LIBRARY})
+    target_include_directories (dbms PRIVATE ${ODBC_INCLUDE_DIRECTORIES} ${Poco_SQLODBC_INCLUDE_DIRS} PUBLIC ${Poco_SQL_INCLUDE_DIRS})
 endif()
 
+if (Poco_DataODBC_FOUND)
+    target_link_libraries (clickhouse_common_io ${Poco_Data_LIBRARY})
+    target_link_libraries (dbms ${Poco_DataODBC_LIBRARY})
+    target_include_directories (dbms PRIVATE ${ODBC_INCLUDE_DIRECTORIES} ${Poco_DataODBC_INCLUDE_DIRS})
+endif()
+
+
 if (Poco_MongoDB_FOUND)
     target_link_libraries (dbms ${Poco_MongoDB_LIBRARY})
 endif()
@@ -212,6 +221,7 @@ endif ()
 target_include_directories (dbms PUBLIC ${DBMS_INCLUDE_DIR})
 target_include_directories (clickhouse_common_io PUBLIC ${DBMS_INCLUDE_DIR})
 target_include_directories (clickhouse_common_io PUBLIC ${PCG_RANDOM_INCLUDE_DIR})
+target_include_directories (clickhouse_common_io PUBLIC ${Poco_DataODBC_INCLUDE_DIRS})
 target_include_directories (clickhouse_common_io BEFORE PUBLIC ${DOUBLE_CONVERSION_INCLUDE_DIR})
 
 # also for copy_headers.sh:
diff --git a/dbms/cmake/version.cmake b/dbms/cmake/version.cmake
index 23bc9eabf29..527af9d983b 100644
--- a/dbms/cmake/version.cmake
+++ b/dbms/cmake/version.cmake
@@ -1,6 +1,6 @@
 # This strings autochanged from release_lib.sh:
-set(VERSION_DESCRIBE v1.1.54372-testing)
-set(VERSION_REVISION 54372)
+set(VERSION_DESCRIBE v1.1.54373-testing)
+set(VERSION_REVISION 54373)
 # end of autochange
 
 set (VERSION_MAJOR 1)
diff --git a/dbms/src/Common/Config/ConfigProcessor.cpp b/dbms/src/Common/Config/ConfigProcessor.cpp
index 8dffcfcb23a..e303b580ba7 100644
--- a/dbms/src/Common/Config/ConfigProcessor.cpp
+++ b/dbms/src/Common/Config/ConfigProcessor.cpp
@@ -11,6 +11,7 @@
 #include <Poco/DOM/Comment.h>
 #include <Poco/Util/XMLConfiguration.h>
 #include <Common/ZooKeeper/ZooKeeperNodeCache.h>
+#include <Common/ZooKeeper/KeeperException.h>
 #include <Common/StringUtils/StringUtils.h>
 
 #define PREPROCESSED_SUFFIX "-preprocessed"
diff --git a/dbms/src/Common/CurrentMetrics.cpp b/dbms/src/Common/CurrentMetrics.cpp
index ead086e2b67..af29cb4912f 100644
--- a/dbms/src/Common/CurrentMetrics.cpp
+++ b/dbms/src/Common/CurrentMetrics.cpp
@@ -28,7 +28,9 @@
     M(MemoryTrackingForMerges) \
     M(LeaderElection) \
     M(EphemeralNode) \
+    M(ZooKeeperSession) \
     M(ZooKeeperWatch) \
+    M(ZooKeeperRequest) \
     M(DelayedInserts) \
     M(ContextLockWait) \
     M(StorageBufferRows) \
diff --git a/dbms/src/Common/ProfileEvents.cpp b/dbms/src/Common/ProfileEvents.cpp
index 71bf37c1a3a..027f52b2f37 100644
--- a/dbms/src/Common/ProfileEvents.cpp
+++ b/dbms/src/Common/ProfileEvents.cpp
@@ -56,14 +56,20 @@
     \
     M(ZooKeeperInit) \
     M(ZooKeeperTransactions) \
-    M(ZooKeeperGetChildren) \
+    M(ZooKeeperList) \
     M(ZooKeeperCreate) \
     M(ZooKeeperRemove) \
     M(ZooKeeperExists) \
     M(ZooKeeperGet) \
     M(ZooKeeperSet) \
     M(ZooKeeperMulti) \
+    M(ZooKeeperCheck) \
+    M(ZooKeeperClose) \
+    M(ZooKeeperWatchResponse) \
     M(ZooKeeperExceptions) \
+    M(ZooKeeperWaitMicroseconds) \
+    M(ZooKeeperBytesSent) \
+    M(ZooKeeperBytesReceived) \
     \
     M(DistributedConnectionFailTry) \
     M(DistributedConnectionMissingTable) \
diff --git a/dbms/src/Common/ZooKeeper/KeeperException.h b/dbms/src/Common/ZooKeeper/KeeperException.h
index d310cb8dc1d..9afe8d46873 100644
--- a/dbms/src/Common/ZooKeeper/KeeperException.h
+++ b/dbms/src/Common/ZooKeeper/KeeperException.h
@@ -1,21 +1,6 @@
 #pragma once
-#include <Common/Exception.h>
+
 #include "Types.h"
-#include <Common/ProfileEvents.h>
-
-
-namespace DB
-{
-    namespace ErrorCodes
-    {
-        extern const int KEEPER_EXCEPTION;
-    }
-}
-
-namespace ProfileEvents
-{
-    extern const Event ZooKeeperExceptions;
-}
 
 
 namespace zkutil
@@ -43,42 +28,7 @@ inline bool isUserError(int32_t zk_return_code)
 }
 
 
-class KeeperException : public DB::Exception
-{
-private:
-    /// delegate constructor, used to minimize repetition; last parameter used for overload resolution
-    KeeperException(const std::string & msg, const int32_t code, int)
-        : DB::Exception(msg, DB::ErrorCodes::KEEPER_EXCEPTION), code(code) { incrementEventCounter(); }
-
-public:
-    KeeperException(const std::string & msg, const int32_t code)
-        : KeeperException(msg + " (" + ZooKeeperImpl::ZooKeeper::errorMessage(code) + ")", code, 0) {}
-    explicit KeeperException(const int32_t code) : KeeperException(ZooKeeperImpl::ZooKeeper::errorMessage(code), code, 0) {}
-    KeeperException(const int32_t code, const std::string & path)
-        : KeeperException(std::string{ZooKeeperImpl::ZooKeeper::errorMessage(code)} + ", path: " + path, code, 0) {}
-
-    KeeperException(const KeeperException & exc) : DB::Exception(exc), code(exc.code) { incrementEventCounter(); }
-
-    const char * name() const throw() override { return "zkutil::KeeperException"; }
-    const char * className() const throw() override { return "zkutil::KeeperException"; }
-    KeeperException * clone() const override { return new KeeperException(*this); }
-
-    /// Any error related with network or master election
-    /// In case of these errors you should reinitialize ZooKeeper session.
-    bool isHardwareError() const
-    {
-        return zkutil::isHardwareError(code);
-    }
-
-    const int32_t code;
-
-private:
-    static void incrementEventCounter()
-    {
-        ProfileEvents::increment(ProfileEvents::ZooKeeperExceptions);
-    }
-
-};
+using KeeperException = ZooKeeperImpl::Exception;
 
 
 class KeeperMultiException : public KeeperException
diff --git a/dbms/src/Common/ZooKeeper/Lock.cpp b/dbms/src/Common/ZooKeeper/Lock.cpp
index f7e2881f9d3..826e5b742aa 100644
--- a/dbms/src/Common/ZooKeeper/Lock.cpp
+++ b/dbms/src/Common/ZooKeeper/Lock.cpp
@@ -1,5 +1,7 @@
+#include "KeeperException.h"
 #include "Lock.h"
 
+
 using namespace zkutil;
 
 bool Lock::tryLock()
diff --git a/dbms/src/Common/ZooKeeper/Lock.h b/dbms/src/Common/ZooKeeper/Lock.h
index 17ded48d26b..683470cf5a5 100644
--- a/dbms/src/Common/ZooKeeper/Lock.h
+++ b/dbms/src/Common/ZooKeeper/Lock.h
@@ -40,7 +40,7 @@ namespace zkutil
             {
                 unlock();
             }
-            catch (const zkutil::KeeperException & e)
+            catch (...)
             {
                 DB::tryLogCurrentException(__PRETTY_FUNCTION__);
             }
diff --git a/dbms/src/Common/ZooKeeper/ZooKeeper.cpp b/dbms/src/Common/ZooKeeper/ZooKeeper.cpp
index e4cda7e05fb..800bbc04a73 100644
--- a/dbms/src/Common/ZooKeeper/ZooKeeper.cpp
+++ b/dbms/src/Common/ZooKeeper/ZooKeeper.cpp
@@ -1,4 +1,5 @@
 #include "ZooKeeper.h"
+#include "KeeperException.h"
 
 #include <random>
 #include <pcg_random.hpp>
@@ -6,7 +7,6 @@
 #include <boost/algorithm/string.hpp>
 
 #include <common/logger_useful.h>
-#include <Common/ProfileEvents.h>
 #include <Common/StringUtils/StringUtils.h>
 #include <Common/PODArray.h>
 #include <Common/randomSeed.h>
@@ -15,25 +15,6 @@
 #define ZOOKEEPER_OPERATION_TIMEOUT_MS 1000
 
 
-namespace ProfileEvents
-{
-    extern const Event ZooKeeperInit;
-    extern const Event ZooKeeperTransactions;
-    extern const Event ZooKeeperCreate;
-    extern const Event ZooKeeperRemove;
-    extern const Event ZooKeeperExists;
-    extern const Event ZooKeeperMulti;
-    extern const Event ZooKeeperGet;
-    extern const Event ZooKeeperSet;
-    extern const Event ZooKeeperGetChildren;
-}
-
-namespace CurrentMetrics
-{
-    extern const Metric ZooKeeperWatch;
-}
-
-
 namespace DB
 {
 namespace ErrorCodes
@@ -84,8 +65,6 @@ void ZooKeeper::init(const std::string & hosts_, const std::string & identity_,
         Poco::Timespan(0, ZOOKEEPER_CONNECTION_TIMEOUT_MS * 1000),
         Poco::Timespan(0, ZOOKEEPER_OPERATION_TIMEOUT_MS * 1000));
 
-    ProfileEvents::increment(ProfileEvents::ZooKeeperInit);
-
     LOG_TRACE(log, "initialized, hosts: " << hosts << (chroot.empty() ? "" : ", chroot: " + chroot));
 
     if (!chroot.empty() && !exists("/"))
@@ -195,9 +174,6 @@ int32_t ZooKeeper::getChildrenImpl(const std::string & path, Strings & res,
 
     impl->list(path, callback, watch_callback);
     event.wait();
-
-    ProfileEvents::increment(ProfileEvents::ZooKeeperGetChildren);
-    ProfileEvents::increment(ProfileEvents::ZooKeeperTransactions);
     return code;
 }
 
@@ -235,9 +211,6 @@ int32_t ZooKeeper::createImpl(const std::string & path, const std::string & data
 
     impl->create(path, data, mode & 1, mode & 2, {}, callback);  /// TODO better mode
     event.wait();
-
-    ProfileEvents::increment(ProfileEvents::ZooKeeperCreate);
-    ProfileEvents::increment(ProfileEvents::ZooKeeperTransactions);
     return code;
 }
 
@@ -305,9 +278,6 @@ int32_t ZooKeeper::removeImpl(const std::string & path, int32_t version)
 
     impl->remove(path, version, callback);
     event.wait();
-
-    ProfileEvents::increment(ProfileEvents::ZooKeeperRemove);
-    ProfileEvents::increment(ProfileEvents::ZooKeeperTransactions);
     return code;
 }
 
@@ -342,9 +312,6 @@ int32_t ZooKeeper::existsImpl(const std::string & path, Stat * stat, WatchCallba
 
     impl->exists(path, callback, watch_callback);
     event.wait();
-
-    ProfileEvents::increment(ProfileEvents::ZooKeeperExists);
-    ProfileEvents::increment(ProfileEvents::ZooKeeperTransactions);
     return code;
 }
 
@@ -383,9 +350,6 @@ int32_t ZooKeeper::getImpl(const std::string & path, std::string & res, Stat * s
 
     impl->get(path, callback, watch_callback);
     event.wait();
-
-    ProfileEvents::increment(ProfileEvents::ZooKeeperGet);
-    ProfileEvents::increment(ProfileEvents::ZooKeeperTransactions);
     return code;
 }
 
@@ -434,9 +398,6 @@ int32_t ZooKeeper::setImpl(const std::string & path, const std::string & data,
 
     impl->set(path, data, version, callback);
     event.wait();
-
-    ProfileEvents::increment(ProfileEvents::ZooKeeperSet);
-    ProfileEvents::increment(ProfileEvents::ZooKeeperTransactions);
     return code;
 }
 
@@ -486,9 +447,6 @@ int32_t ZooKeeper::multiImpl(const Requests & requests, Responses & responses)
 
     impl->multi(requests, callback);
     event.wait();
-
-    ProfileEvents::increment(ProfileEvents::ZooKeeperMulti);
-    ProfileEvents::increment(ProfileEvents::ZooKeeperTransactions);
     return code;
 }
 
@@ -595,9 +553,6 @@ void ZooKeeper::waitForDisappear(const std::string & path)
         impl->exists(path, callback, watch);
         event.wait();
 
-        ProfileEvents::increment(ProfileEvents::ZooKeeperExists);
-        ProfileEvents::increment(ProfileEvents::ZooKeeperTransactions);
-
         if (code == ZooKeeperImpl::ZooKeeper::ZNONODE)
             return;
 
@@ -646,9 +601,6 @@ std::future<ZooKeeperImpl::ZooKeeper::GetResponse> ZooKeeper::asyncGet(const std
     };
 
     impl->get(path, std::move(callback), {});
-
-    ProfileEvents::increment(ProfileEvents::ZooKeeperGet);
-    ProfileEvents::increment(ProfileEvents::ZooKeeperTransactions);
     return future;
 }
 
@@ -667,9 +619,6 @@ std::future<ZooKeeperImpl::ZooKeeper::GetResponse> ZooKeeper::asyncTryGet(const
     };
 
     impl->get(path, std::move(callback), {});
-
-    ProfileEvents::increment(ProfileEvents::ZooKeeperGet);
-    ProfileEvents::increment(ProfileEvents::ZooKeeperTransactions);
     return future;
 }
 
@@ -687,9 +636,6 @@ std::future<ZooKeeperImpl::ZooKeeper::ExistsResponse> ZooKeeper::asyncExists(con
     };
 
     impl->exists(path, std::move(callback), {});
-
-    ProfileEvents::increment(ProfileEvents::ZooKeeperExists);
-    ProfileEvents::increment(ProfileEvents::ZooKeeperTransactions);
     return future;
 }
 
@@ -708,9 +654,6 @@ std::future<ZooKeeperImpl::ZooKeeper::ListResponse> ZooKeeper::asyncGetChildren(
     };
 
     impl->list(path, std::move(callback), {});
-
-    ProfileEvents::increment(ProfileEvents::ZooKeeperGetChildren);
-    ProfileEvents::increment(ProfileEvents::ZooKeeperTransactions);
     return future;
 }
 
@@ -728,9 +671,6 @@ std::future<ZooKeeperImpl::ZooKeeper::RemoveResponse> ZooKeeper::asyncRemove(con
     };
 
     impl->remove(path, version, std::move(callback));
-
-    ProfileEvents::increment(ProfileEvents::ZooKeeperRemove);
-    ProfileEvents::increment(ProfileEvents::ZooKeeperTransactions);
     return future;
 }
 
@@ -748,9 +688,6 @@ std::future<ZooKeeperImpl::ZooKeeper::RemoveResponse> ZooKeeper::asyncTryRemove(
     };
 
     impl->remove(path, version, std::move(callback));
-
-    ProfileEvents::increment(ProfileEvents::ZooKeeperRemove);
-    ProfileEvents::increment(ProfileEvents::ZooKeeperTransactions);
     return future;
 }
 
@@ -765,9 +702,6 @@ std::future<ZooKeeperImpl::ZooKeeper::MultiResponse> ZooKeeper::tryAsyncMulti(co
     };
 
     impl->multi(ops, std::move(callback));
-
-    ProfileEvents::increment(ProfileEvents::ZooKeeperMulti);
-    ProfileEvents::increment(ProfileEvents::ZooKeeperTransactions);
     return future;
 }
 
@@ -785,9 +719,6 @@ std::future<ZooKeeperImpl::ZooKeeper::MultiResponse> ZooKeeper::asyncMulti(const
     };
 
     impl->multi(ops, std::move(callback));
-
-    ProfileEvents::increment(ProfileEvents::ZooKeeperMulti);
-    ProfileEvents::increment(ProfileEvents::ZooKeeperTransactions);
     return future;
 }
 
diff --git a/dbms/src/Common/ZooKeeper/ZooKeeper.h b/dbms/src/Common/ZooKeeper/ZooKeeper.h
index dfea3bbfce7..25b6f4a993a 100644
--- a/dbms/src/Common/ZooKeeper/ZooKeeper.h
+++ b/dbms/src/Common/ZooKeeper/ZooKeeper.h
@@ -1,7 +1,6 @@
 #pragma once
 
 #include "Types.h"
-#include "KeeperException.h"
 #include <Poco/Util/LayeredConfiguration.h>
 #include <unordered_set>
 #include <future>
diff --git a/dbms/src/Common/ZooKeeper/ZooKeeperImpl.cpp b/dbms/src/Common/ZooKeeper/ZooKeeperImpl.cpp
index 3f999a85384..0895e58c827 100644
--- a/dbms/src/Common/ZooKeeper/ZooKeeperImpl.cpp
+++ b/dbms/src/Common/ZooKeeper/ZooKeeperImpl.cpp
@@ -1,9 +1,11 @@
 #include <Common/ZooKeeper/ZooKeeperImpl.h>
 #include <Common/Exception.h>
+#include <Common/ProfileEvents.h>
 #include <Common/typeid_cast.h>
 
 #include <IO/WriteHelpers.h>
 #include <IO/ReadHelpers.h>
+#include <IO/Operators.h>
 #include <IO/WriteBufferFromString.h>
 
 #include <Poco/Exception.h>
@@ -11,7 +13,40 @@
 
 #include <array>
 
-//#include <iostream>
+
+namespace DB
+{
+    namespace ErrorCodes
+    {
+        extern const int KEEPER_EXCEPTION;
+    }
+}
+
+namespace ProfileEvents
+{
+    extern const Event ZooKeeperExceptions;
+    extern const Event ZooKeeperInit;
+    extern const Event ZooKeeperTransactions;
+    extern const Event ZooKeeperCreate;
+    extern const Event ZooKeeperRemove;
+    extern const Event ZooKeeperExists;
+    extern const Event ZooKeeperMulti;
+    extern const Event ZooKeeperGet;
+    extern const Event ZooKeeperSet;
+    extern const Event ZooKeeperList;
+    extern const Event ZooKeeperCheck;
+    extern const Event ZooKeeperClose;
+    extern const Event ZooKeeperWaitMicroseconds;
+    extern const Event ZooKeeperBytesSent;
+    extern const Event ZooKeeperBytesReceived;
+    extern const Event ZooKeeperWatchResponse;
+}
+
+namespace CurrentMetrics
+{
+    extern const Metric ZooKeeperRequest;
+    extern const Metric ZooKeeperWatch;
+}
 
 
 /** ZooKeeper wire protocol.
@@ -228,6 +263,33 @@ after:
 namespace ZooKeeperImpl
 {
 
+Exception::Exception(const std::string & msg, const int32_t code, int)
+    : DB::Exception(msg, DB::ErrorCodes::KEEPER_EXCEPTION), code(code)
+{
+    ProfileEvents::increment(ProfileEvents::ZooKeeperExceptions);
+}
+
+Exception::Exception(const std::string & msg, const int32_t code)
+    : Exception(msg + " (" + ZooKeeperImpl::ZooKeeper::errorMessage(code) + ")", code, 0)
+{
+}
+
+Exception::Exception(const int32_t code)
+    : Exception(ZooKeeperImpl::ZooKeeper::errorMessage(code), code, 0)
+{
+}
+
+Exception::Exception(const int32_t code, const std::string & path)
+    : Exception(std::string{ZooKeeperImpl::ZooKeeper::errorMessage(code)} + ", path: " + path, code, 0)
+{
+}
+
+Exception::Exception(const Exception & exc)
+    : DB::Exception(exc), code(exc.code)
+{
+}
+
+
 using namespace DB;
 
 
@@ -304,10 +366,10 @@ void read(String & s, ReadBuffer & in)
     static constexpr int32_t max_string_size = 1 << 20;
     int32_t size = 0;
     read(size, in);
-    if (size < 0)
-        throw Exception("Negative size");   /// TODO Actually it means that zookeeper node have NULL value. Maybe better to treat it like empty string.
+    if (size < 0)    /// TODO Actually it means that zookeeper node has NULL value. Maybe better to treat it like empty string.
+        throw Exception("Negative size while reading string from ZooKeeper", ZooKeeper::ZMARSHALLINGERROR);
     if (size > max_string_size)
-        throw Exception("Too large string size");   /// TODO error code
+        throw Exception("Too large string size while reading from ZooKeeper", ZooKeeper::ZMARSHALLINGERROR);
     s.resize(size);
     in.read(&s[0], size);
 }
@@ -317,7 +379,7 @@ template <size_t N> void read(std::array<char, N> & s, ReadBuffer & in)
     int32_t size = 0;
     read(size, in);
     if (size != N)
-        throw Exception("Unexpected array size");   /// TODO error code
+        throw Exception("Unexpected array size while reading from ZooKeeper", ZooKeeper::ZMARSHALLINGERROR);
     in.read(&s[0], N);
 }
 
@@ -347,9 +409,9 @@ template <typename T> void read(std::vector<T> & arr, ReadBuffer & in)
     int32_t size = 0;
     read(size, in);
     if (size < 0)
-        throw Exception("Negative size");
+        throw Exception("Negative size while reading array from ZooKeeper", ZooKeeper::ZMARSHALLINGERROR);
     if (size > max_array_size)
-        throw Exception("Too large array size");   /// TODO error code
+        throw Exception("Too large array size while reading from ZooKeeper", ZooKeeper::ZMARSHALLINGERROR);
     arr.resize(size);
     for (auto & elem : arr)
         read(elem, in);
@@ -478,6 +540,8 @@ ZooKeeper::ZooKeeper(
 
     send_thread = std::thread([this] { sendThread(); });
     receive_thread = std::thread([this] { receiveThread(); });
+
+    ProfileEvents::increment(ProfileEvents::ZooKeeperInit);
 }
 
 
@@ -488,6 +552,7 @@ void ZooKeeper::connect(
     static constexpr size_t num_tries = 3;
     bool connected = false;
 
+    WriteBufferFromOwnString fail_reasons;
     for (size_t try_no = 0; try_no < num_tries; ++try_no)
     {
         for (const auto & address : addresses)
@@ -500,10 +565,11 @@ void ZooKeeper::connect(
             }
             catch (const Poco::Net::NetException & e)
             {
-                /// TODO log exception
+                fail_reasons << "\n" << getCurrentExceptionMessage(false);
             }
             catch (const Poco::TimeoutException & e)
             {
+                fail_reasons << "\n" << getCurrentExceptionMessage(false);
             }
         }
 
@@ -512,7 +578,22 @@ void ZooKeeper::connect(
     }
 
     if (!connected)
-        throw Exception("All connection tries failed"); /// TODO more info; error code
+    {
+        WriteBufferFromOwnString out;
+        out << "All connection tries failed while connecting to ZooKeeper. Addresses: ";
+        bool first = true;
+        for (const auto & address : addresses)
+        {
+            if (first)
+                first = false;
+            else
+                out << ", ";
+            out << address.toString();
+        }
+
+        out << fail_reasons.str();
+        throw Exception(out.str(), ZCONNECTIONLOSS);
+    }
 
     socket.setReceiveTimeout(operation_timeout);
     socket.setSendTimeout(operation_timeout);
@@ -553,15 +634,15 @@ void ZooKeeper::receiveHandshake()
 
     read(handshake_length);
     if (handshake_length != 36)
-        throw Exception("Unexpected handshake length received: " + toString(handshake_length));
+        throw Exception("Unexpected handshake length received: " + toString(handshake_length), ZMARSHALLINGERROR);
 
     read(protocol_version_read);
     if (protocol_version_read != protocol_version)
-        throw Exception("Unexpected protocol version: " + toString(protocol_version_read));
+        throw Exception("Unexpected protocol version: " + toString(protocol_version_read), ZMARSHALLINGERROR);
 
     read(timeout);
     if (timeout != session_timeout.totalMilliseconds())
-        throw Exception("Received different session timeout from server: " + toString(timeout));
+        throw Exception("Received different session timeout from server: " + toString(timeout), ZMARSHALLINGERROR);
 
     read(session_id);
     read(passwd);
@@ -588,14 +669,17 @@ void ZooKeeper::sendAuth(const String & scheme, const String & data)
     read(err);
 
     if (xid != auth_xid)
-        throw Exception("Unexpected event recievent in reply to auth request: " + toString(xid));
+        throw Exception("Unexpected event recieved in reply to auth request: " + toString(xid),
+            ZMARSHALLINGERROR);
 
     int32_t actual_length = in->count() - count_before_event;
     if (length != actual_length)
-        throw Exception("Response length doesn't match. Expected: " + toString(length) + ", actual: " + toString(actual_length));
+        throw Exception("Response length doesn't match. Expected: " + toString(length) + ", actual: " + toString(actual_length),
+            ZMARSHALLINGERROR);
 
     if (err)
-        throw Exception("Error received in reply to auth request. Code: " + toString(err) + ". Message: " + String(errorMessage(err)));
+        throw Exception("Error received in reply to auth request. Code: " + toString(err) + ". Message: " + String(errorMessage(err)),
+            ZMARSHALLINGERROR);
 }
 
 
@@ -607,6 +691,8 @@ void ZooKeeper::sendThread()
     {
         while (!expired)
         {
+            auto prev_bytes_sent = out->count();
+
             auto now = clock::now();
             auto next_heartbeat_time = prev_heartbeat_time + std::chrono::milliseconds(session_timeout.totalMilliseconds() / 3);
 
@@ -635,6 +721,8 @@ void ZooKeeper::sendThread()
                 request.xid = ping_xid;
                 request.write(*out);
             }
+
+            ProfileEvents::increment(ProfileEvents::ZooKeeperBytesSent, out->count() - prev_bytes_sent);
         }
     }
     catch (...)
@@ -657,19 +745,21 @@ void ZooKeeper::receiveThread()
         Int64 waited = 0;
         while (!expired)
         {
+            auto prev_bytes_received = in->count();
+
             clock::time_point now = clock::now();
             UInt64 max_wait = operation_timeout.totalMicroseconds();
-            bool has_operations = false;
+            std::optional<RequestInfo> earliest_operation;
 
             {
                 std::lock_guard lock(operations_mutex);
                 if (!operations.empty())
                 {
                     /// Operations are ordered by xid (and consequently, by time).
-                    has_operations = true;
-                    auto earliest_operation_deadline = operations.begin()->second.time + std::chrono::microseconds(operation_timeout.totalMicroseconds());
+                    earliest_operation = operations.begin()->second;
+                    auto earliest_operation_deadline = earliest_operation->time + std::chrono::microseconds(operation_timeout.totalMicroseconds());
                     if (now > earliest_operation_deadline)
-                        throw Exception("Operation timeout");
+                        throw Exception("Operation timeout (deadline already expired) for path: " + earliest_operation->request->getPath(), ZOPERATIONTIMEOUT);
                     max_wait = std::chrono::duration_cast<std::chrono::microseconds>(earliest_operation_deadline - now).count();
                 }
             }
@@ -684,13 +774,15 @@ void ZooKeeper::receiveThread()
             }
             else
             {
-                if (has_operations)
-                    throw Exception("Operation timeout");
+                if (earliest_operation)
+                    throw Exception("Operation timeout (no response) for path: " + earliest_operation->request->getPath(), ZOPERATIONTIMEOUT);
                 waited += max_wait;
                 if (waited > session_timeout.totalMicroseconds())
-                    throw Exception("Nothing is received in session timeout");
+                    throw Exception("Nothing is received in session timeout", ZOPERATIONTIMEOUT);
 
             }
+
+            ProfileEvents::increment(ProfileEvents::ZooKeeperBytesReceived, in->count() - prev_bytes_received);
         }
     }
     catch (...)
@@ -729,10 +821,10 @@ ZooKeeper::ResponsePtr ZooKeeper::CloseRequest::makeResponse() const { return st
 void addRootPath(String & path, const String & root_path)
 {
     if (path.empty())
-        throw Exception("Path cannot be empty");
+        throw Exception("Path cannot be empty", ZooKeeper::ZBADARGUMENTS);
 
     if (path[0] != '/')
-        throw Exception("Path must begin with /");
+        throw Exception("Path must begin with /", ZooKeeper::ZBADARGUMENTS);
 
     if (root_path.empty())
         return;
@@ -749,7 +841,7 @@ void removeRootPath(String & path, const String & root_path)
         return;
 
     if (path.size() <= root_path.size())
-        throw Exception("Received path is not longer than root_path");
+        throw Exception("Received path is not longer than root_path", ZooKeeper::ZDATAINCONSISTENCY);
 
     path = path.substr(root_path.size());
 }
@@ -798,14 +890,13 @@ void ZooKeeper::receiveEvent()
     if (xid == ping_xid)
     {
         if (err)
-            throw Exception("Received error in heartbeat response: " + String(errorMessage(err)));
+            throw Exception("Received error in heartbeat response: " + String(errorMessage(err)), ZRUNTIMEINCONSISTENCY);
 
         response = std::make_shared<HeartbeatResponse>();
-
-//        std::cerr << "Received heartbeat\n";
     }
     else if (xid == watch_xid)
     {
+        ProfileEvents::increment(ProfileEvents::ZooKeeperWatchResponse);
         response = std::make_shared<WatchResponse>();
 
         request_info.callback = [this](const Response & response)
@@ -832,11 +923,10 @@ void ZooKeeper::receiveEvent()
                     if (callback)
                         callback(watch_response);   /// NOTE We may process callbacks not under mutex.
 
+                CurrentMetrics::sub(CurrentMetrics::ZooKeeperWatch, it->second.size());
                 watches.erase(it);
             }
         };
-
-//        std::cerr << "Received watch\n";
     }
     else
     {
@@ -845,15 +935,17 @@ void ZooKeeper::receiveEvent()
 
             auto it = operations.find(xid);
             if (it == operations.end())
-                throw Exception("Received response for unknown xid");
+                throw Exception("Received response for unknown xid", ZRUNTIMEINCONSISTENCY);
 
             request_info = std::move(it->second);
             operations.erase(it);
+            CurrentMetrics::sub(CurrentMetrics::ZooKeeperRequest);
         }
 
-//        std::cerr << "Received response: " << request_info.request->getOpNum() << "\n";
-
         response = request_info.request->makeResponse();
+
+        auto elapsed_microseconds = std::chrono::duration_cast<std::chrono::microseconds>(clock::now() - request_info.time).count();
+        ProfileEvents::increment(ProfileEvents::ZooKeeperWaitMicroseconds, elapsed_microseconds);
     }
 
     if (err)
@@ -866,7 +958,7 @@ void ZooKeeper::receiveEvent()
 
     int32_t actual_length = in->count() - count_before_event;
     if (length != actual_length)
-        throw Exception("Response length doesn't match. Expected: " + toString(length) + ", actual: " + toString(actual_length));
+        throw Exception("Response length doesn't match. Expected: " + toString(length) + ", actual: " + toString(actual_length), ZMARSHALLINGERROR);
 
     if (request_info.callback)
         request_info.callback(*response);
@@ -905,6 +997,7 @@ void ZooKeeper::finalize(bool error_send, bool error_receive)
                         request_info.callback(*response);
                 }
 
+                CurrentMetrics::sub(CurrentMetrics::ZooKeeperRequest, operations.size());
                 operations.clear();
             }
 
@@ -923,6 +1016,7 @@ void ZooKeeper::finalize(bool error_send, bool error_receive)
                             callback(response);
                 }
 
+                CurrentMetrics::sub(CurrentMetrics::ZooKeeperWatch, watches.size());
                 watches.clear();
             }
         }
@@ -1058,12 +1152,13 @@ void ZooKeeper::ErrorResponse::readImpl(ReadBuffer & in)
     ZooKeeperImpl::read(read_error, in);
 
     if (read_error != error)
-        throw Exception("Error code in ErrorResponse (" + toString(read_error) + ") doesn't match error code in header (" + toString(error) + ")");
+        throw Exception("Error code in ErrorResponse (" + toString(read_error) + ") doesn't match error code in header (" + toString(error) + ")",
+            ZMARSHALLINGERROR);
 }
 
 void ZooKeeper::CloseResponse::readImpl(ReadBuffer &)
 {
-    throw Exception("Received response for close request");
+    throw Exception("Received response for close request", ZRUNTIMEINCONSISTENCY);
 }
 
 ZooKeeper::MultiResponse::MultiResponse(const Requests & requests)
@@ -1086,10 +1181,8 @@ void ZooKeeper::MultiResponse::readImpl(ReadBuffer & in)
         ZooKeeperImpl::read(done, in);
         ZooKeeperImpl::read(op_error, in);
 
-//        std::cerr << "Received result for multi: " << op_num << "\n";
-
         if (done)
-            throw Exception("Not enough results received for multi transaction");
+            throw Exception("Not enough results received for multi transaction", ZMARSHALLINGERROR);
 
         /// op_num == -1 is special for multi transaction.
         /// For unknown reason, error code is duplicated in header and in response body.
@@ -1123,11 +1216,11 @@ void ZooKeeper::MultiResponse::readImpl(ReadBuffer & in)
         ZooKeeperImpl::read(error, in);
 
         if (!done)
-            throw Exception("Too many results received for multi transaction");
+            throw Exception("Too many results received for multi transaction", ZMARSHALLINGERROR);
         if (op_num != -1)
-            throw Exception("Unexpected op_num received at the end of results for multi transaction");
+            throw Exception("Unexpected op_num received at the end of results for multi transaction", ZMARSHALLINGERROR);
         if (error != -1)
-            throw Exception("Unexpected error value received at the end of results for multi transaction");
+            throw Exception("Unexpected error value received at the end of results for multi transaction", ZMARSHALLINGERROR);
     }
 }
 
@@ -1136,7 +1229,7 @@ void ZooKeeper::pushRequest(RequestInfo && info)
 {
     /// If the request is close request, we push it even after session is expired - because it will signal sending thread to stop.
     if (expired && info.request->xid != close_xid)
-        throw Exception("Session expired");
+        throw Exception("Session expired", ZSESSIONEXPIRED);
 
     info.request->addRootPath(root_path);
 
@@ -1146,10 +1239,13 @@ void ZooKeeper::pushRequest(RequestInfo && info)
     {
         info.request->xid = xid.fetch_add(1);
         if (info.request->xid < 0)
-            throw Exception("XID overflow");
+            throw Exception("XID overflow", ZSESSIONEXPIRED);
     }
 
+    ProfileEvents::increment(ProfileEvents::ZooKeeperTransactions);
+
     {
+        CurrentMetrics::add(CurrentMetrics::ZooKeeperRequest);
         std::lock_guard lock(operations_mutex);
         operations[info.request->xid] = info;
     }
@@ -1157,12 +1253,13 @@ void ZooKeeper::pushRequest(RequestInfo && info)
     if (info.watch)
     {
         info.request->has_watch = true;
+        CurrentMetrics::add(CurrentMetrics::ZooKeeperWatch);
         std::lock_guard lock(watches_mutex);
         watches[info.request->getPath()].emplace_back(std::move(info.watch));
     }
 
-    if (!requests.tryPush(info.request, session_timeout.totalMilliseconds()))
-        throw Exception("Cannot push request to queue within session timeout");
+    if (!requests.tryPush(info.request, operation_timeout.totalMilliseconds()))
+        throw Exception("Cannot push request to queue within operation timeout", ZOPERATIONTIMEOUT);
 }
 
 
@@ -1186,6 +1283,7 @@ void ZooKeeper::create(
     request_info.callback = [callback](const Response & response) { callback(typeid_cast<const CreateResponse &>(response)); };
 
     pushRequest(std::move(request_info));
+    ProfileEvents::increment(ProfileEvents::ZooKeeperCreate);
 }
 
 
@@ -1203,6 +1301,7 @@ void ZooKeeper::remove(
     request_info.callback = [callback](const Response & response) { callback(typeid_cast<const RemoveResponse &>(response)); };
 
     pushRequest(std::move(request_info));
+    ProfileEvents::increment(ProfileEvents::ZooKeeperRemove);
 }
 
 
@@ -1220,6 +1319,7 @@ void ZooKeeper::exists(
     request_info.watch = watch;
 
     pushRequest(std::move(request_info));
+    ProfileEvents::increment(ProfileEvents::ZooKeeperExists);
 }
 
 
@@ -1237,6 +1337,7 @@ void ZooKeeper::get(
     request_info.watch = watch;
 
     pushRequest(std::move(request_info));
+    ProfileEvents::increment(ProfileEvents::ZooKeeperGet);
 }
 
 
@@ -1256,6 +1357,7 @@ void ZooKeeper::set(
     request_info.callback = [callback](const Response & response) { callback(typeid_cast<const SetResponse &>(response)); };
 
     pushRequest(std::move(request_info));
+    ProfileEvents::increment(ProfileEvents::ZooKeeperSet);
 }
 
 
@@ -1273,6 +1375,7 @@ void ZooKeeper::list(
     request_info.watch = watch;
 
     pushRequest(std::move(request_info));
+    ProfileEvents::increment(ProfileEvents::ZooKeeperList);
 }
 
 
@@ -1290,6 +1393,7 @@ void ZooKeeper::check(
     request_info.callback = [callback](const Response & response) { callback(typeid_cast<const CheckResponse &>(response)); };
 
     pushRequest(std::move(request_info));
+    ProfileEvents::increment(ProfileEvents::ZooKeeperCheck);
 }
 
 
@@ -1310,6 +1414,7 @@ void ZooKeeper::multi(
     request_info.callback = [callback](const Response & response) { callback(typeid_cast<const MultiResponse &>(response)); };
 
     pushRequest(std::move(request_info));
+    ProfileEvents::increment(ProfileEvents::ZooKeeperMulti);
 }
 
 
@@ -1322,6 +1427,7 @@ void ZooKeeper::close()
     request_info.request = std::make_shared<CloseRequest>(std::move(request));
 
     pushRequest(std::move(request_info));
+    ProfileEvents::increment(ProfileEvents::ZooKeeperClose);
 }
 
 
diff --git a/dbms/src/Common/ZooKeeper/ZooKeeperImpl.h b/dbms/src/Common/ZooKeeper/ZooKeeperImpl.h
index 512e6a9a421..b3d8a057c49 100644
--- a/dbms/src/Common/ZooKeeper/ZooKeeperImpl.h
+++ b/dbms/src/Common/ZooKeeper/ZooKeeperImpl.h
@@ -2,6 +2,7 @@
 
 #include <Core/Types.h>
 #include <Common/ConcurrentBoundedQueue.h>
+#include <Common/CurrentMetrics.h>
 
 #include <IO/ReadBuffer.h>
 #include <IO/WriteBuffer.h>
@@ -23,12 +24,38 @@
 #include <functional>
 
 
+namespace CurrentMetrics
+{
+    extern const Metric ZooKeeperSession;
+}
+
+
 namespace ZooKeeperImpl
 {
 
 using namespace DB;
 
 
+class Exception : public DB::Exception
+{
+private:
+    /// Delegate constructor, used to minimize repetition; last parameter used for overload resolution.
+    Exception(const std::string & msg, const int32_t code, int);
+
+public:
+    explicit Exception(const int32_t code);
+    Exception(const std::string & msg, const int32_t code);
+    Exception(const int32_t code, const std::string & path);
+    Exception(const Exception & exc);
+
+    const char * name() const throw() override { return "ZooKeeperImpl::Exception"; }
+    const char * className() const throw() override { return "ZooKeeperImpl::Exception"; }
+    Exception * clone() const override { return new Exception(*this); }
+
+    const int32_t code;
+};
+
+
 /** Usage scenario:
   * - create an object and issue commands;
   * - you provide callbacks for your commands; callbacks are invoked in internal thread and must be cheap:
@@ -543,6 +570,8 @@ private:
 
     template <typename T>
     void read(T &);
+
+    CurrentMetrics::Increment metric_increment{CurrentMetrics::ZooKeeperSession};
 };
 
 };
diff --git a/dbms/src/Common/ZooKeeper/tests/gtest_zkutil_test_multi_exception.cpp b/dbms/src/Common/ZooKeeper/tests/gtest_zkutil_test_multi_exception.cpp
index 1a564854ebf..edb51147fd8 100644
--- a/dbms/src/Common/ZooKeeper/tests/gtest_zkutil_test_multi_exception.cpp
+++ b/dbms/src/Common/ZooKeeper/tests/gtest_zkutil_test_multi_exception.cpp
@@ -1,5 +1,6 @@
 #include <Common/typeid_cast.h>
 #include <Common/ZooKeeper/ZooKeeper.h>
+#include <Common/ZooKeeper/KeeperException.h>
 #include <Common/StringUtils/StringUtils.h>
 #include <iostream>
 #include <chrono>
diff --git a/dbms/src/Common/ZooKeeper/tests/zkutil_expiration_test.cpp b/dbms/src/Common/ZooKeeper/tests/zkutil_expiration_test.cpp
index 28bd45dfe33..c2c34952968 100644
--- a/dbms/src/Common/ZooKeeper/tests/zkutil_expiration_test.cpp
+++ b/dbms/src/Common/ZooKeeper/tests/zkutil_expiration_test.cpp
@@ -1,5 +1,6 @@
 #include <iostream>
 #include <Common/ZooKeeper/ZooKeeper.h>
+#include <Common/ZooKeeper/KeeperException.h>
 #include <Poco/ConsoleChannel.h>
 #include <Common/Exception.h>
 
diff --git a/dbms/src/Common/ZooKeeper/tests/zkutil_test_commands.cpp b/dbms/src/Common/ZooKeeper/tests/zkutil_test_commands.cpp
index 670a7bcb75f..78817734cd4 100644
--- a/dbms/src/Common/ZooKeeper/tests/zkutil_test_commands.cpp
+++ b/dbms/src/Common/ZooKeeper/tests/zkutil_test_commands.cpp
@@ -1,4 +1,5 @@
 #include <Common/ZooKeeper/ZooKeeper.h>
+#include <Common/ZooKeeper/KeeperException.h>
 #include <Common/typeid_cast.h>
 #include <iostream>
 #include <port/unistd.h>
diff --git a/dbms/src/Common/config.h.in b/dbms/src/Common/config.h.in
index aa7f75182d0..2531d9ced70 100644
--- a/dbms/src/Common/config.h.in
+++ b/dbms/src/Common/config.h.in
@@ -9,6 +9,7 @@
 #cmakedefine01 USE_RDKAFKA
 #cmakedefine01 USE_CAPNP
 #cmakedefine01 USE_EMBEDDED_COMPILER
+#cmakedefine01 Poco_SQLODBC_FOUND
 #cmakedefine01 Poco_DataODBC_FOUND
 #cmakedefine01 Poco_MongoDB_FOUND
 #cmakedefine01 Poco_NetSSL_FOUND
diff --git a/dbms/src/Common/config_build.cpp.in b/dbms/src/Common/config_build.cpp.in
index c9fe56634a6..6d3a8e21959 100644
--- a/dbms/src/Common/config_build.cpp.in
+++ b/dbms/src/Common/config_build.cpp.in
@@ -34,6 +34,7 @@ const char * auto_config_build[]
     "USE_VECTORCLASS", "@USE_VECTORCLASS@",
     "USE_RDKAFKA", "@USE_RDKAFKA@",
     "USE_CAPNP", "@USE_CAPNP@",
+    "USE_Poco_SQLODBC", "@Poco_SQLODBC_FOUND@",
     "USE_Poco_DataODBC", "@Poco_DataODBC_FOUND@",
     "USE_Poco_MongoDB", "@Poco_MongoDB_FOUND@",
     "USE_Poco_NetSSL", "@Poco_NetSSL_FOUND@",
diff --git a/dbms/src/Dictionaries/DictionarySourceFactory.cpp b/dbms/src/Dictionaries/DictionarySourceFactory.cpp
index 463cbee3ac7..6c9c355893d 100644
--- a/dbms/src/Dictionaries/DictionarySourceFactory.cpp
+++ b/dbms/src/Dictionaries/DictionarySourceFactory.cpp
@@ -19,7 +19,7 @@
 #if Poco_MongoDB_FOUND
     #include <Dictionaries/MongoDBDictionarySource.h>
 #endif
-#if Poco_DataODBC_FOUND
+#if Poco_SQLODBC_FOUND || Poco_DataODBC_FOUND
 #pragma GCC diagnostic push
 #pragma GCC diagnostic ignored "-Wunused-parameter"
     #include <Poco/Data/ODBC/Connector.h>
@@ -89,7 +89,7 @@ Block createSampleBlock(const DictionaryStructure & dict_struct)
 DictionarySourceFactory::DictionarySourceFactory()
     : log(&Poco::Logger::get("DictionarySourceFactory"))
 {
-#if Poco_DataODBC_FOUND
+#if Poco_SQLODBC_FOUND || Poco_DataODBC_FOUND
     Poco::Data::ODBC::Connector::registerConnector();
 #endif
 }
@@ -154,7 +154,7 @@ DictionarySourcePtr DictionarySourceFactory::create(
     }
     else if ("odbc" == source_type)
     {
-#if Poco_DataODBC_FOUND
+#if Poco_SQLODBC_FOUND || Poco_DataODBC_FOUND
         return std::make_unique<ODBCDictionarySource>(dict_struct, config, config_prefix + ".odbc", sample_block, context);
 #else
         throw Exception{"Dictionary source of type `odbc` is disabled because poco library was built without ODBC support.",
diff --git a/dbms/src/Dictionaries/ODBCDictionarySource.h b/dbms/src/Dictionaries/ODBCDictionarySource.h
index 174541ddfe9..0f10dbd94ff 100644
--- a/dbms/src/Dictionaries/ODBCDictionarySource.h
+++ b/dbms/src/Dictionaries/ODBCDictionarySource.h
@@ -1,17 +1,15 @@
 #pragma once
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+#include <Poco/Data/SessionPool.h>
+#pragma GCC diagnostic pop
 #include <Dictionaries/IDictionarySource.h>
 #include <Dictionaries/ExternalQueryBuilder.h>
 #include <Dictionaries/DictionaryStructure.h>
 
-
 namespace Poco
 {
-    namespace Data
-    {
-        class SessionPool;
-    }
-
     namespace Util
     {
         class AbstractConfiguration;
diff --git a/dbms/src/Interpreters/Context.cpp b/dbms/src/Interpreters/Context.cpp
index 3e8e07bad3f..b0bf8f6f441 100644
--- a/dbms/src/Interpreters/Context.cpp
+++ b/dbms/src/Interpreters/Context.cpp
@@ -515,12 +515,6 @@ void Context::setConfig(const ConfigurationPtr & config)
     shared->config = config;
 }
 
-ConfigurationPtr Context::getConfig() const
-{
-    auto lock = getLock();
-    return shared->config;
-}
-
 Poco::Util::AbstractConfiguration & Context::getConfigRef() const
 {
     auto lock = getLock();
@@ -689,10 +683,10 @@ void Context::assertTableExists(const String & database_name, const String & tab
 
     Databases::const_iterator it = shared->databases.find(db);
     if (shared->databases.end() == it)
-        throw Exception("Database " + db + " doesn't exist", ErrorCodes::UNKNOWN_DATABASE);
+        throw Exception("Database " + backQuoteIfNeed(db) + " doesn't exist", ErrorCodes::UNKNOWN_DATABASE);
 
     if (!it->second->isTableExist(*this, table_name))
-        throw Exception("Table " + db + "." + table_name + " doesn't exist.", ErrorCodes::UNKNOWN_TABLE);
+        throw Exception("Table " + backQuoteIfNeed(db) + "." + backQuoteIfNeed(table_name) + " doesn't exist.", ErrorCodes::UNKNOWN_TABLE);
 }
 
 
@@ -706,7 +700,7 @@ void Context::assertTableDoesntExist(const String & database_name, const String
 
     Databases::const_iterator it = shared->databases.find(db);
     if (shared->databases.end() != it && it->second->isTableExist(*this, table_name))
-        throw Exception("Table " + db + "." + table_name + " already exists.", ErrorCodes::TABLE_ALREADY_EXISTS);
+        throw Exception("Table " + backQuoteIfNeed(db) + "." + backQuoteIfNeed(table_name) + " already exists.", ErrorCodes::TABLE_ALREADY_EXISTS);
 }
 
 
@@ -719,7 +713,7 @@ void Context::assertDatabaseExists(const String & database_name, bool check_data
         checkDatabaseAccessRights(db);
 
     if (shared->databases.end() == shared->databases.find(db))
-        throw Exception("Database " + db + " doesn't exist", ErrorCodes::UNKNOWN_DATABASE);
+        throw Exception("Database " + backQuoteIfNeed(db) + " doesn't exist", ErrorCodes::UNKNOWN_DATABASE);
 }
 
 
@@ -731,7 +725,7 @@ void Context::assertDatabaseDoesntExist(const String & database_name) const
     checkDatabaseAccessRights(db);
 
     if (shared->databases.end() != shared->databases.find(db))
-        throw Exception("Database " + db + " already exists.", ErrorCodes::DATABASE_ALREADY_EXISTS);
+        throw Exception("Database " + backQuoteIfNeed(db) + " already exists.", ErrorCodes::DATABASE_ALREADY_EXISTS);
 }
 
 
@@ -801,7 +795,7 @@ StoragePtr Context::getTableImpl(const String & database_name, const String & ta
     if (shared->databases.end() == it)
     {
         if (exception)
-            *exception = Exception("Database " + db + " doesn't exist", ErrorCodes::UNKNOWN_DATABASE);
+            *exception = Exception("Database " + backQuoteIfNeed(db) + " doesn't exist", ErrorCodes::UNKNOWN_DATABASE);
         return {};
     }
 
@@ -809,7 +803,7 @@ StoragePtr Context::getTableImpl(const String & database_name, const String & ta
     if (!table)
     {
         if (exception)
-            *exception = Exception("Table " + db + "." + table_name + " doesn't exist.", ErrorCodes::UNKNOWN_TABLE);
+            *exception = Exception("Table " + backQuoteIfNeed(db) + "." + backQuoteIfNeed(table_name) + " doesn't exist.", ErrorCodes::UNKNOWN_TABLE);
         return {};
     }
 
@@ -820,7 +814,7 @@ StoragePtr Context::getTableImpl(const String & database_name, const String & ta
 void Context::addExternalTable(const String & table_name, const StoragePtr & storage, const ASTPtr & ast)
 {
     if (external_tables.end() != external_tables.find(table_name))
-        throw Exception("Temporary table " + table_name + " already exists.", ErrorCodes::TABLE_ALREADY_EXISTS);
+        throw Exception("Temporary table " + backQuoteIfNeed(table_name) + " already exists.", ErrorCodes::TABLE_ALREADY_EXISTS);
 
     external_tables[table_name] = std::pair(storage, ast);
 }
@@ -926,7 +920,7 @@ ASTPtr Context::getCreateExternalTableQuery(const String & table_name) const
 {
     TableAndCreateASTs::const_iterator jt = external_tables.find(table_name);
     if (external_tables.end() == jt)
-        throw Exception("Temporary Table" + table_name + " doesn't exist", ErrorCodes::UNKNOWN_TABLE);
+        throw Exception("Temporary table " + backQuoteIfNeed(table_name) + " doesn't exist", ErrorCodes::UNKNOWN_TABLE);
 
     return jt->second.second;
 }
@@ -1326,21 +1320,13 @@ DDLWorker & Context::getDDLWorker() const
     return *shared->ddl_worker;
 }
 
-void Context::setZooKeeper(zkutil::ZooKeeperPtr zookeeper)
-{
-    std::lock_guard<std::mutex> lock(shared->zookeeper_mutex);
-
-    if (shared->zookeeper)
-        throw Exception("ZooKeeper client has already been set.", ErrorCodes::LOGICAL_ERROR);
-
-    shared->zookeeper = std::move(zookeeper);
-}
-
 zkutil::ZooKeeperPtr Context::getZooKeeper() const
 {
     std::lock_guard<std::mutex> lock(shared->zookeeper_mutex);
 
-    if (shared->zookeeper && shared->zookeeper->expired())
+    if (!shared->zookeeper)
+        shared->zookeeper = std::make_shared<zkutil::ZooKeeper>(getConfigRef(), "zookeeper");
+    else if (shared->zookeeper->expired())
         shared->zookeeper = shared->zookeeper->startNewSession();
 
     return shared->zookeeper;
diff --git a/dbms/src/Interpreters/Context.h b/dbms/src/Interpreters/Context.h
index 73ddb5dce64..670bda401bf 100644
--- a/dbms/src/Interpreters/Context.h
+++ b/dbms/src/Interpreters/Context.h
@@ -140,7 +140,6 @@ public:
 
     /// Global application configuration settings.
     void setConfig(const ConfigurationPtr & config);
-    ConfigurationPtr getConfig() const;
     Poco::Util::AbstractConfiguration & getConfigRef() const;
 
     /** Take the list of users, quotas and configuration profiles from this config.
@@ -300,7 +299,6 @@ public:
     MergeList & getMergeList();
     const MergeList & getMergeList() const;
 
-    void setZooKeeper(std::shared_ptr<zkutil::ZooKeeper> zookeeper);
     /// If the current session is expired at the time of the call, synchronously creates and returns a new session with the startNewSession() call.
     std::shared_ptr<zkutil::ZooKeeper> getZooKeeper() const;
     /// Has ready or expired ZooKeeper
diff --git a/dbms/src/Interpreters/DDLWorker.cpp b/dbms/src/Interpreters/DDLWorker.cpp
index ea176fb998b..5a820ff7334 100644
--- a/dbms/src/Interpreters/DDLWorker.cpp
+++ b/dbms/src/Interpreters/DDLWorker.cpp
@@ -32,6 +32,7 @@
 #include <Columns/ColumnArray.h>
 
 #include <Common/ZooKeeper/ZooKeeper.h>
+#include <Common/ZooKeeper/KeeperException.h>
 #include <Common/ZooKeeper/Lock.h>
 #include <Common/isLocalAddress.h>
 #include <Poco/Timestamp.h>
@@ -858,7 +859,7 @@ void DDLWorker::run()
             }
             catch (const zkutil::KeeperException & e)
             {
-                if (!e.isHardwareError())
+                if (!zkutil::isHardwareError(e.code))
                     throw;
             }
         }
@@ -886,7 +887,7 @@ void DDLWorker::run()
         }
         catch (zkutil::KeeperException & e)
         {
-            if (e.isHardwareError())
+            if (zkutil::isHardwareError(e.code))
             {
                 LOG_DEBUG(log, "Recovering ZooKeeper session after: " << getCurrentExceptionMessage(false));
 
diff --git a/dbms/src/Interpreters/ExpressionAnalyzer.cpp b/dbms/src/Interpreters/ExpressionAnalyzer.cpp
index 500e4cd775d..2b84a413778 100644
--- a/dbms/src/Interpreters/ExpressionAnalyzer.cpp
+++ b/dbms/src/Interpreters/ExpressionAnalyzer.cpp
@@ -1519,7 +1519,9 @@ void ExpressionAnalyzer::makeSetsForIndexImpl(const ASTPtr & node, const Block &
                 }
                 else
                 {
-                    ExpressionActionsPtr temp_actions = std::make_shared<ExpressionActions>(source_columns, settings);
+                    NamesAndTypesList temp_columns = source_columns;
+                    temp_columns.insert(temp_columns.end(), aggregated_columns.begin(), aggregated_columns.end());
+                    ExpressionActionsPtr temp_actions = std::make_shared<ExpressionActions>(temp_columns, settings);
                     getRootActions(func->arguments->children.at(0), true, false, temp_actions);
 
                     Block sample_block_with_calculated_columns = temp_actions->getSampleBlock();
diff --git a/dbms/src/Server/ClusterCopier.cpp b/dbms/src/Server/ClusterCopier.cpp
index 61fe2234124..625e687f3dc 100644
--- a/dbms/src/Server/ClusterCopier.cpp
+++ b/dbms/src/Server/ClusterCopier.cpp
@@ -17,10 +17,19 @@
 #include <boost/algorithm/string.hpp>
 #include <pcg_random.hpp>
 
+#include <common/logger_useful.h>
+#include <common/ThreadPool.h>
+#include <daemon/OwnPatternFormatter.h>
+
 #include <Common/Exception.h>
 #include <Common/ZooKeeper/ZooKeeper.h>
+#include <Common/ZooKeeper/KeeperException.h>
 #include <Common/getFQDNOrHostName.h>
 #include <Common/isLocalAddress.h>
+#include <Common/typeid_cast.h>
+#include <Common/ClickHouseRevision.h>
+#include <Common/formatReadable.h>
+#include <Common/escapeForFileName.h>
 #include <Client/Connection.h>
 #include <Interpreters/Context.h>
 #include <Interpreters/Cluster.h>
@@ -30,12 +39,6 @@
 #include <Interpreters/InterpreterShowCreateQuery.h>
 #include <Interpreters/InterpreterDropQuery.h>
 #include <Interpreters/InterpreterCreateQuery.h>
-
-#include <common/logger_useful.h>
-#include <common/ThreadPool.h>
-#include <Common/typeid_cast.h>
-#include <Common/ClickHouseRevision.h>
-#include <Common/escapeForFileName.h>
 #include <Columns/ColumnString.h>
 #include <Columns/ColumnsNumber.h>
 #include <DataTypes/DataTypeString.h>
@@ -61,8 +64,6 @@
 #include <Storages/StorageDistributed.h>
 #include <Databases/DatabaseMemory.h>
 #include <Server/StatusFile.h>
-#include <Common/formatReadable.h>
-#include <daemon/OwnPatternFormatter.h>
 
 
 namespace DB
@@ -715,13 +716,11 @@ class ClusterCopier
 {
 public:
 
-    ClusterCopier(const ConfigurationPtr & zookeeper_config_,
-                  const String & task_path_,
+    ClusterCopier(const String & task_path_,
                   const String & host_id_,
                   const String & proxy_database_name_,
                   Context & context_)
     :
-        zookeeper_config(zookeeper_config_),
         task_zookeeper_path(task_path_),
         host_id(host_id_),
         working_database_name(proxy_database_name_),
@@ -732,7 +731,7 @@ public:
 
     void init()
     {
-        auto zookeeper = getZooKeeper();
+        auto zookeeper = context.getZooKeeper();
 
         task_description_watch_callback = [this] (const ZooKeeperImpl::ZooKeeper::WatchResponse &)
         {
@@ -762,8 +761,8 @@ public:
 
         /// Do not initialize tables, will make deferred initialization in process()
 
-        getZooKeeper()->createAncestors(getWorkersPathVersion() + "/");
-        getZooKeeper()->createAncestors(getWorkersPath() + "/");
+        zookeeper->createAncestors(getWorkersPathVersion() + "/");
+        zookeeper->createAncestors(getWorkersPath() + "/");
     }
 
     template <typename T>
@@ -890,7 +889,7 @@ public:
 
     void reloadTaskDescription()
     {
-        auto zookeeper = getZooKeeper();
+        auto zookeeper = context.getZooKeeper();
         task_description_watch_zookeeper = zookeeper;
 
         String task_config_str;
@@ -1087,7 +1086,7 @@ protected:
     {
         LOG_DEBUG(log, "Check that all shards processed partition " << partition_name << " successfully");
 
-        auto zookeeper = getZooKeeper();
+        auto zookeeper = context.getZooKeeper();
 
         Strings status_paths;
         for (auto & shard : shards_with_partition)
@@ -1213,7 +1212,7 @@ protected:
         {
             cleaner_holder = zkutil::EphemeralNodeHolder::create(dirt_cleaner_path, *zookeeper, host_id);
         }
-        catch (zkutil::KeeperException & e)
+        catch (const zkutil::KeeperException & e)
         {
             if (e.code == ZooKeeperImpl::ZooKeeper::ZNODEEXISTS)
             {
@@ -1459,7 +1458,7 @@ protected:
         TaskTable & task_table = task_shard.task_table;
         ClusterPartition & cluster_partition = task_table.getClusterPartition(task_partition.name);
 
-        auto zookeeper = getZooKeeper();
+        auto zookeeper = context.getZooKeeper();
 
         String is_dirty_flag_path = task_partition.getCommonPartitionIsDirtyPath();
         String current_task_is_active_path = task_partition.getActiveWorkerPath();
@@ -1693,7 +1692,7 @@ protected:
                             status = future_is_dirty_checker->get();
                             future_is_dirty_checker.reset();
                         }
-                        catch (zkutil::KeeperException & e)
+                        catch (const zkutil::KeeperException & e)
                         {
                             future_is_dirty_checker.reset();
                             throw;
@@ -1995,21 +1994,7 @@ protected:
         return successful_shards;
     }
 
-    zkutil::ZooKeeperPtr getZooKeeper()
-    {
-        auto zookeeper = context.getZooKeeper();
-
-        if (!zookeeper)
-        {
-            context.setZooKeeper(std::make_shared<zkutil::ZooKeeper>(*zookeeper_config, "zookeeper"));
-            zookeeper = context.getZooKeeper();
-        }
-
-        return zookeeper;
-    }
-
 private:
-    ConfigurationPtr zookeeper_config;
     String task_zookeeper_path;
     String task_description_path;
     String host_id;
@@ -2152,6 +2137,7 @@ void ClusterCopierApp::mainImpl()
     auto context = std::make_unique<Context>(Context::createGlobal());
     SCOPE_EXIT(context->shutdown());
 
+    context->setConfig(zookeeper_configuration);
     context->setGlobalContext(*context);
     context->setApplicationType(Context::ApplicationType::LOCAL);
     context->setPath(process_path);
@@ -2165,8 +2151,7 @@ void ClusterCopierApp::mainImpl()
     context->addDatabase(default_database, std::make_shared<DatabaseMemory>(default_database));
     context->setCurrentDatabase(default_database);
 
-    std::unique_ptr<ClusterCopier> copier(new ClusterCopier(
-        zookeeper_configuration, task_path, host_id, default_database, *context));
+    std::unique_ptr<ClusterCopier> copier = std::make_unique<ClusterCopier>(task_path, host_id, default_database, *context);
 
     copier->setSafeMode(is_safe_mode);
     copier->setCopyFaultProbability(copy_fault_probability);
diff --git a/dbms/src/Server/Server.cpp b/dbms/src/Server/Server.cpp
index 5c692462058..6133d4be2bf 100644
--- a/dbms/src/Server/Server.cpp
+++ b/dbms/src/Server/Server.cpp
@@ -102,12 +102,7 @@ int Server::main(const std::vector<std::string> & /*args*/)
     global_context->setGlobalContext(*global_context);
     global_context->setApplicationType(Context::ApplicationType::SERVER);
 
-    bool has_zookeeper = false;
-    if (config().has("zookeeper"))
-    {
-        global_context->setZooKeeper(std::make_shared<zkutil::ZooKeeper>(config(), "zookeeper"));
-        has_zookeeper = true;
-    }
+    bool has_zookeeper = config().has("zookeeper");
 
     zkutil::ZooKeeperNodeCache main_config_zk_node_cache([&] { return global_context->getZooKeeper(); });
     if (loaded_config.has_zk_includes)
diff --git a/dbms/src/Storages/MergeTree/MergeTreeData.cpp b/dbms/src/Storages/MergeTree/MergeTreeData.cpp
index 5b5a6b87c8e..19daa71d3e3 100644
--- a/dbms/src/Storages/MergeTree/MergeTreeData.cpp
+++ b/dbms/src/Storages/MergeTree/MergeTreeData.cpp
@@ -2189,18 +2189,17 @@ bool MergeTreeData::isPrimaryKeyColumnPossiblyWrappedInFunctions(const ASTPtr &
 
 bool MergeTreeData::mayBenefitFromIndexForIn(const ASTPtr & left_in_operand) const
 {
-    /// Make sure that the left side of the IN operator is part of the primary key.
-    /// If there is a tuple on the left side of the IN operator, each item of the tuple must be part of the primary key.
+    /// Make sure that the left side of the IN operator contain part of the primary key.
+    /// If there is a tuple on the left side of the IN operator, at least one item of the tuple must be part of the primary key (probably wrapped by a chain of some acceptable functions).
     const ASTFunction * left_in_operand_tuple = typeid_cast<const ASTFunction *>(left_in_operand.get());
     if (left_in_operand_tuple && left_in_operand_tuple->name == "tuple")
     {
         for (const auto & item : left_in_operand_tuple->arguments->children)
-            if (!isPrimaryKeyColumnPossiblyWrappedInFunctions(item))
-                /// The tuple itself may be part of the primary key, so check that as a last resort.
-                return isPrimaryKeyColumnPossiblyWrappedInFunctions(left_in_operand);
+            if (isPrimaryKeyColumnPossiblyWrappedInFunctions(item))
+                return true;
 
-        /// tuple() is invalid but can still be found here since this method may be called before the arguments are validated.
-        return !left_in_operand_tuple->arguments->children.empty();
+        /// The tuple itself may be part of the primary key, so check that as a last resort.
+        return isPrimaryKeyColumnPossiblyWrappedInFunctions(left_in_operand);
     }
     else
     {
diff --git a/dbms/src/Storages/MergeTree/ReplicatedMergeTreeAlterThread.cpp b/dbms/src/Storages/MergeTree/ReplicatedMergeTreeAlterThread.cpp
index 3c20b0a2069..3b9099f23eb 100644
--- a/dbms/src/Storages/MergeTree/ReplicatedMergeTreeAlterThread.cpp
+++ b/dbms/src/Storages/MergeTree/ReplicatedMergeTreeAlterThread.cpp
@@ -1,5 +1,6 @@
 #include <memory>
 #include <Common/setThreadName.h>
+#include <Common/ZooKeeper/KeeperException.h>
 #include <Interpreters/InterpreterAlterQuery.h>
 #include <Storages/ColumnsDescription.h>
 #include <Storages/StorageReplicatedMergeTree.h>
diff --git a/dbms/src/Storages/MergeTree/ReplicatedMergeTreeBlockOutputStream.cpp b/dbms/src/Storages/MergeTree/ReplicatedMergeTreeBlockOutputStream.cpp
index 9fafd5f2e9d..8aca9fe4f2e 100644
--- a/dbms/src/Storages/MergeTree/ReplicatedMergeTreeBlockOutputStream.cpp
+++ b/dbms/src/Storages/MergeTree/ReplicatedMergeTreeBlockOutputStream.cpp
@@ -5,8 +5,10 @@
 #include <Interpreters/PartLog.h>
 #include <DataStreams/IBlockOutputStream.h>
 #include <Common/SipHash.h>
+#include <Common/ZooKeeper/KeeperException.h>
 #include <IO/Operators.h>
 
+
 namespace ProfileEvents
 {
     extern const Event DuplicatedInsertedBlocks;
@@ -25,6 +27,7 @@ namespace ErrorCodes
     extern const int READONLY;
     extern const int UNKNOWN_STATUS_OF_INSERT;
     extern const int INSERT_WAS_DEDUPLICATED;
+    extern const int KEEPER_EXCEPTION;
 }
 
 
diff --git a/dbms/src/Storages/MergeTree/ReplicatedMergeTreeRestartingThread.cpp b/dbms/src/Storages/MergeTree/ReplicatedMergeTreeRestartingThread.cpp
index 97fcb1523a8..6b20b5c86c1 100644
--- a/dbms/src/Storages/MergeTree/ReplicatedMergeTreeRestartingThread.cpp
+++ b/dbms/src/Storages/MergeTree/ReplicatedMergeTreeRestartingThread.cpp
@@ -4,6 +4,7 @@
 #include <Storages/MergeTree/ReplicatedMergeTreeQuorumEntry.h>
 #include <Storages/MergeTree/ReplicatedMergeTreeAddress.h>
 #include <Common/setThreadName.h>
+#include <Common/ZooKeeper/KeeperException.h>
 #include <Common/randomSeed.h>
 
 
diff --git a/dbms/src/Storages/StorageODBC.h b/dbms/src/Storages/StorageODBC.h
index 5632fe38282..605d35b0202 100644
--- a/dbms/src/Storages/StorageODBC.h
+++ b/dbms/src/Storages/StorageODBC.h
@@ -1,17 +1,13 @@
 #pragma once
 
 #include <ext/shared_ptr_helper.h>
-
 #include <Storages/IStorage.h>
 
+#pragma GCC diagnostic push
+#pragma GCC diagnostic ignored "-Wunused-parameter"
+    #include <Poco/Data/SessionPool.h>
+#pragma GCC diagnostic pop
 
-namespace Poco
-{
-    namespace Data
-    {
-        class SessionPool;
-    }
-}
 
 
 namespace DB
diff --git a/dbms/src/Storages/registerStorages.cpp b/dbms/src/Storages/registerStorages.cpp
index ae10de9c916..6f140d92562 100644
--- a/dbms/src/Storages/registerStorages.cpp
+++ b/dbms/src/Storages/registerStorages.cpp
@@ -23,7 +23,7 @@ void registerStorageJoin(StorageFactory & factory);
 void registerStorageView(StorageFactory & factory);
 void registerStorageMaterializedView(StorageFactory & factory);
 
-#if Poco_DataODBC_FOUND
+#if Poco_SQLODBC_FOUND || Poco_DataODBC_FOUND
 void registerStorageODBC(StorageFactory & factory);
 #endif
 
@@ -56,7 +56,7 @@ void registerStorages()
     registerStorageView(factory);
     registerStorageMaterializedView(factory);
 
-    #if Poco_DataODBC_FOUND
+    #if Poco_SQLODBC_FOUND || Poco_DataODBC_FOUND
     registerStorageODBC(factory);
     #endif
 
diff --git a/dbms/src/TableFunctions/CMakeLists.txt b/dbms/src/TableFunctions/CMakeLists.txt
index e717359090e..4708ed9b602 100644
--- a/dbms/src/TableFunctions/CMakeLists.txt
+++ b/dbms/src/TableFunctions/CMakeLists.txt
@@ -6,7 +6,13 @@ list(REMOVE_ITEM clickhouse_table_functions_headers ITableFunction.h TableFuncti
 
 add_library(clickhouse_table_functions ${clickhouse_table_functions_sources})
 target_link_libraries(clickhouse_table_functions dbms clickhouse_storages_system ${Poco_Foundation_LIBRARY})
+
+if (Poco_SQLODBC_FOUND)
+    target_link_libraries (clickhouse_table_functions ${Poco_SQLODBC_LIBRARY})
+    target_include_directories (clickhouse_table_functions PRIVATE ${ODBC_INCLUDE_DIRECTORIES} ${Poco_SQLODBC_INCLUDE_DIRS})
+endif ()
+
 if (Poco_DataODBC_FOUND)
     target_link_libraries (clickhouse_table_functions ${Poco_DataODBC_LIBRARY})
-    target_include_directories (clickhouse_table_functions PRIVATE ${ODBC_INCLUDE_DIRECTORIES})
+    target_include_directories (clickhouse_table_functions PRIVATE ${ODBC_INCLUDE_DIRECTORIES} ${Poco_DataODBC_INCLUDE_DIRS})
 endif ()
diff --git a/dbms/src/TableFunctions/TableFunctionODBC.cpp b/dbms/src/TableFunctions/TableFunctionODBC.cpp
index b75e48de054..c9cb78479a9 100644
--- a/dbms/src/TableFunctions/TableFunctionODBC.cpp
+++ b/dbms/src/TableFunctions/TableFunctionODBC.cpp
@@ -1,6 +1,6 @@
 #include <TableFunctions/TableFunctionODBC.h>
 
-#if Poco_DataODBC_FOUND
+#if Poco_SQLODBC_FOUND || Poco_DataODBC_FOUND
 #include <type_traits>
 #include <ext/scope_guard.h>
 
diff --git a/dbms/src/TableFunctions/TableFunctionODBC.h b/dbms/src/TableFunctions/TableFunctionODBC.h
index b0f81749647..eb06a8c5097 100644
--- a/dbms/src/TableFunctions/TableFunctionODBC.h
+++ b/dbms/src/TableFunctions/TableFunctionODBC.h
@@ -1,7 +1,7 @@
 #pragma once
 
 #include <Common/config.h>
-#if Poco_DataODBC_FOUND
+#if Poco_SQLODBC_FOUND || Poco_DataODBC_FOUND
 
 #include <TableFunctions/ITableFunction.h>
 
diff --git a/dbms/src/TableFunctions/registerTableFunctions.cpp b/dbms/src/TableFunctions/registerTableFunctions.cpp
index af069a5fcf6..94ac0a79fa6 100644
--- a/dbms/src/TableFunctions/registerTableFunctions.cpp
+++ b/dbms/src/TableFunctions/registerTableFunctions.cpp
@@ -11,7 +11,7 @@ void registerTableFunctionRemote(TableFunctionFactory & factory);
 void registerTableFunctionShardByHash(TableFunctionFactory & factory);
 void registerTableFunctionNumbers(TableFunctionFactory & factory);
 void registerTableFunctionCatBoostPool(TableFunctionFactory & factory);
-#if Poco_DataODBC_FOUND
+#if Poco_SQLODBC_FOUND || Poco_DataODBC_FOUND
 void registerTableFunctionODBC(TableFunctionFactory & factory);
 #endif
 
@@ -30,7 +30,7 @@ void registerTableFunctions()
     registerTableFunctionNumbers(factory);
     registerTableFunctionCatBoostPool(factory);
 
-#if Poco_DataODBC_FOUND
+#if Poco_SQLODBC_FOUND || Poco_DataODBC_FOUND
     registerTableFunctionODBC(factory);
 #endif
 
diff --git a/dbms/tests/queries/0_stateless/00612_pk_in_tuple.reference b/dbms/tests/queries/0_stateless/00612_pk_in_tuple.reference
new file mode 100644
index 00000000000..de69348862a
--- /dev/null
+++ b/dbms/tests/queries/0_stateless/00612_pk_in_tuple.reference
@@ -0,0 +1,13 @@
+all
+1	[1]
+2	[2]
+key, arrayJoin(arr) in (1, 1)
+1	1
+key, arrayJoin(arr) in ((1, 1), (2, 2))
+1	1
+2	2
+(key, left array join arr) in (1, 1)
+1
+(key, left array join arr) in ((1, 1), (2, 2))
+1
+2
diff --git a/dbms/tests/queries/0_stateless/00612_pk_in_tuple.sql b/dbms/tests/queries/0_stateless/00612_pk_in_tuple.sql
new file mode 100644
index 00000000000..f6e34909cae
--- /dev/null
+++ b/dbms/tests/queries/0_stateless/00612_pk_in_tuple.sql
@@ -0,0 +1,16 @@
+create database if not exists test;
+drop table if exists test.tab;
+create table test.tab (key UInt64, arr Array(UInt64)) Engine = MergeTree order by key;
+insert into test.tab values (1, [1]);
+insert into test.tab values (2, [2]);
+select 'all';
+select * from test.tab order by key;
+select 'key, arrayJoin(arr) in (1, 1)';
+select key, arrayJoin(arr) as val from test.tab where (key, val) in (1, 1);
+select 'key, arrayJoin(arr) in ((1, 1), (2, 2))';
+select key, arrayJoin(arr) as val from test.tab where (key, val) in ((1, 1), (2, 2)) order by key;
+select '(key, left array join arr) in (1, 1)';
+select key from test.tab left array join arr as val where (key, val) in (1, 1);
+select '(key, left array join arr) in ((1, 1), (2, 2))';
+select key from test.tab left array join arr as val where (key, val) in ((1, 1), (2, 2)) order by key;
+
diff --git a/debian/changelog b/debian/changelog
index 11e474be4f7..b6925a6dd69 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,5 +1,5 @@
-clickhouse (1.1.54372) unstable; urgency=low
+clickhouse (1.1.54373) unstable; urgency=low
 
   * Modified source code
 
- --  <robot-metrika-test@yandex-team.ru>  Mon, 02 Apr 2018 22:13:54 +0300
+ --  <robot-metrika-test@yandex-team.ru>  Wed, 04 Apr 2018 00:45:07 +0300
diff --git a/docs/en/getting_started/index.md b/docs/en/getting_started/index.md
index 10ed75040d8..d3e9ea03915 100755
--- a/docs/en/getting_started/index.md
+++ b/docs/en/getting_started/index.md
@@ -31,7 +31,7 @@ Then run:
 ```bash
 sudo apt-key adv --keyserver keyserver.ubuntu.com --recv E0C56BD4    # optional
 sudo apt-get update
-sudo apt-get install clickhouse-client clickhouse-server
+sudo apt-get install clickhouse-client clickhouse-server-common
 ```
 
 You can also download and install packages manually from here:
diff --git a/docs/en/interfaces/third-party_client_libraries.md b/docs/en/interfaces/third-party_client_libraries.md
index 8437be23b99..10ef1e62b49 100755
--- a/docs/en/interfaces/third-party_client_libraries.md
+++ b/docs/en/interfaces/third-party_client_libraries.md
@@ -33,6 +33,9 @@ There are libraries for working with ClickHouse for:
    - [ClickHouse-Net](https://github.com/killwort/ClickHouse-Net)
 - C++
    - [clickhouse-cpp](https://github.com/artpaul/clickhouse-cpp/)
+- Elixir
+  - [clickhousex](https://github.com/appodeal/clickhousex/)
+  - [clickhouse_ecto](https://github.com/appodeal/clickhouse_ecto)
 
 We have not tested these libraries. They are listed in random order.
 
diff --git a/docs/ru/getting_started/index.md b/docs/ru/getting_started/index.md
index 2198ab2bc7d..3847663b3d5 100644
--- a/docs/ru/getting_started/index.md
+++ b/docs/ru/getting_started/index.md
@@ -31,7 +31,7 @@ deb http://repo.yandex.ru/clickhouse/deb/stable/ main/
 ```bash
 sudo apt-key adv --keyserver keyserver.ubuntu.com --recv E0C56BD4    # optional
 sudo apt-get update
-sudo apt-get install clickhouse-client clickhouse-server
+sudo apt-get install clickhouse-client clickhouse-server-common
 ```
 
 Также можно скачать и установить пакеты вручную, отсюда: <https://repo.yandex.ru/clickhouse/deb/stable/main/>.
diff --git a/docs/ru/interfaces/third-party_client_libraries.md b/docs/ru/interfaces/third-party_client_libraries.md
index 3a081b9b6ce..c416d9ee859 100644
--- a/docs/ru/interfaces/third-party_client_libraries.md
+++ b/docs/ru/interfaces/third-party_client_libraries.md
@@ -33,5 +33,8 @@
   - [ClickHouse-Net](https://github.com/killwort/ClickHouse-Net)
 - C++
   - [clickhouse-cpp](https://github.com/artpaul/clickhouse-cpp/)
+- Elixir
+  - [clickhousex](https://github.com/appodeal/clickhousex/)
+  - [clickhouse_ecto](https://github.com/appodeal/clickhouse_ecto)
 
 Библиотеки не тестировались нами. Порядок перечисления произвольный.
diff --git a/utils/zookeeper-cli/zookeeper-cli.cpp b/utils/zookeeper-cli/zookeeper-cli.cpp
index 266bf5bb34d..6da1a7c02a3 100644
--- a/utils/zookeeper-cli/zookeeper-cli.cpp
+++ b/utils/zookeeper-cli/zookeeper-cli.cpp
@@ -206,13 +206,13 @@ int main(int argc, char ** argv)
                 }
 
             }
-            catch (zkutil::KeeperException & e)
+            catch (const zkutil::KeeperException & e)
             {
                 std::cerr << "KeeperException: " << e.displayText() << std::endl;
             }
         }
     }
-    catch (zkutil::KeeperException & e)
+    catch (const zkutil::KeeperException & e)
     {
         std::cerr << "KeeperException: " << e.displayText() << std::endl;
         return 1;
diff --git a/utils/zookeeper-dump-tree/main.cpp b/utils/zookeeper-dump-tree/main.cpp
index 1d614216a24..a0b0f1554ea 100644
--- a/utils/zookeeper-dump-tree/main.cpp
+++ b/utils/zookeeper-dump-tree/main.cpp
@@ -3,6 +3,7 @@
 #include <boost/program_options.hpp>
 #include <Common/Exception.h>
 #include <Common/ZooKeeper/ZooKeeper.h>
+#include <Common/ZooKeeper/KeeperException.h>
 
 
 int main(int argc, char ** argv)
diff --git a/website/deprecated/reference_en.html b/website/deprecated/reference_en.html
index e6e4dee6227..728c9622087 100644
--- a/website/deprecated/reference_en.html
+++ b/website/deprecated/reference_en.html
@@ -439,7 +439,7 @@ Then run:
 %%
 sudo apt-key adv --keyserver keyserver.ubuntu.com --recv E0C56BD4    # optional
 sudo apt-get update
-sudo apt-get install -y clickhouse-client clickhouse-server
+sudo apt-get install clickhouse-client clickhouse-server-common
 %%
 
 You can also download and install packages manually from here:
@@ -709,7 +709,7 @@ echo &#39;DROP TABLE t&#39; | POST &#39;http://localhost:8123/&#39;
 
 For successful requests that don&#39;t return a data table, an empty response body is returned.
 
-You can use compression when transmitting data. The compressed data has a non-standard format, and you will need to use a special clickhouse-compressor program to work with it (%%sudo apt-get install clickhouse-utils%%).
+You can use compression when transmitting data. The compressed data has a non-standard format, and you will need to use a special compressor program to work with it (%%sudo apt-get install clickhouse-compressor%%).
 
 If you specified &#39;compress=1&#39; in the URL, the server will compress the data it sends you.
 If you specified &#39;decompress=1&#39; in the URL, the server will decompress the same data that you pass in the POST method.
diff --git a/website/deprecated/reference_ru.html b/website/deprecated/reference_ru.html
index 2965054a737..c7b4126a167 100644
--- a/website/deprecated/reference_ru.html
+++ b/website/deprecated/reference_ru.html
@@ -449,7 +449,7 @@ deb http://repo.yandex.ru/clickhouse/trusty stable main
 %%
 sudo apt-key adv --keyserver keyserver.ubuntu.com --recv E0C56BD4    # optional
 sudo apt-get update
-sudo apt-get install -y clickhouse-client clickhouse-server
+sudo apt-get install clickhouse-client clickhouse-server-common
 %%
 
 Также можно скачать и установить пакеты вручную, отсюда:
@@ -725,7 +725,7 @@ echo 'DROP TABLE t' | POST 'http://localhost:8123/'
 
 Для запросов, которые не возвращают таблицу с данными, в случае успеха, выдаётся пустое тело ответа.
 
-Вы можете использовать сжатие при передаче данных. Формат сжатых данных нестандартный, и вам придётся использовать для работы с ним специальную программу clickhouse-compressor (%%sudo apt-get install clickhouse-utils%%).
+Вы можете использовать сжатие при передаче данных. Формат сжатых данных нестандартный, и вам придётся использовать для работы с ним специальную программу compressor (%%sudo apt-get install clickhouse-compressor%%).
 
 Если вы указали в URL compress=1, то сервер будет сжимать отправляемые вам данные.
 Если вы указали в URL decompress=1, то сервер будет разжимать те данные, которые вы передаёте ему POST-ом.
diff --git a/website/index.html b/website/index.html
index 78b89d3b07b..e315b78199d 100644
--- a/website/index.html
+++ b/website/index.html
@@ -393,7 +393,7 @@ sudo apt-key adv --keyserver keyserver.ubuntu.com --recv E0C56BD4    # optional
 sudo apt-add-repository "deb http://repo.yandex.ru/clickhouse/deb/stable/ main/"
 sudo apt-get update
 
-sudo apt-get install -y clickhouse-server clickhouse-client
+sudo apt-get install clickhouse-server-common clickhouse-client -y
 
 sudo service clickhouse-server start
 clickhouse-client
diff --git a/website/tutorial.html b/website/tutorial.html
index 558d9a0d0fe..0472bef268d 100644
--- a/website/tutorial.html
+++ b/website/tutorial.html
@@ -51,7 +51,7 @@
 
     <p><b>clickhouse-client</b> package contains <a
             href="docs/en/interfaces/cli/">clickhouse-client</a> application —
-        interactive ClickHouse client. <b>clickhouse-common</b> contains a clickhouse-server binary file. <b>clickhouse-server</b>
+        interactive ClickHouse client. <b>clickhouse-server-base</b> contains a clickhouse-server binary file. <b>clickhouse-server-common</b>
         — contains config files for the clickhouse-server.</p>
 
     <p>Server config files are located in /etc/clickhouse-server/. Before getting to work please notice the <b>path</b>