Merge branch 'master' of github.com:yandex/ClickHouse

CHANGELOG.md

@@ -185,7 +185,7 @@
 * Fixed "select_format" performance test for `Pretty` formats [#5642](https://github.com/yandex/ClickHouse/pull/5642) ([alexey-milovidov](https://github.com/alexey-milovidov))
 
 
-## ClickHouse release 19.9.4.1, 2019-07-05
+## ClickHouse release 19.9.3.31, 2019-07-05
 
 ### Bug Fix
 * Fix segfault in Delta codec which affects columns with values less than 32 bits size. The bug led to random memory corruption. [#5786](https://github.com/yandex/ClickHouse/pull/5786) ([alesapin](https://github.com/alesapin))
@@ -197,7 +197,7 @@
 * Fix race condition, which cause that some queries may not appear in query_log instantly after SYSTEM FLUSH LOGS query. [#5685](https://github.com/yandex/ClickHouse/pull/5685) ([Anton Popov](https://github.com/CurtizJ))
 * Added missing support for constant arguments to `evalMLModel` function. [#5820](https://github.com/yandex/ClickHouse/pull/5820) ([alexey-milovidov](https://github.com/alexey-milovidov))
 
-## ClickHouse release 19.7.6.1, 2019-07-05
+## ClickHouse release 19.7.5.29, 2019-07-05
 
 ### Bug Fix
 * Fix performance regression in some queries with JOIN. [#5192](https://github.com/yandex/ClickHouse/pull/5192) ([Winter Zhang](https://github.com/zhang2014))

CMakeLists.txt

@@ -437,10 +437,10 @@ message (STATUS "Building for: ${CMAKE_SYSTEM} ${CMAKE_SYSTEM_PROCESSOR} ${CMAKE
 
 include(GNUInstallDirs)
 include (cmake/find_contrib_lib.cmake)
+include (cmake/lib_name.cmake)
 
 find_contrib_lib(double-conversion) # Must be before parquet
 include (cmake/find_ssl.cmake)
-include (cmake/lib_name.cmake)
 include (cmake/find_icu.cmake)
 include (cmake/find_boost.cmake)
 include (cmake/find_zlib.cmake)

cmake/find_fastops.cmake

@@ -1,4 +1,6 @@
-option (ENABLE_FASTOPS "Enable fast vectorized mathematical functions library by Michael Parakhin" ${NOT_UNBUNDLED})
+if (NOT ARCH_ARM AND NOT OS_FREEBSD)
+    option (ENABLE_FASTOPS "Enable fast vectorized mathematical functions library by Mikhail Parakhin" ${NOT_UNBUNDLED})
+endif ()
 
 if (ENABLE_FASTOPS)
     if(NOT EXISTS "${ClickHouse_SOURCE_DIR}/contrib/fastops/fastops/fastops.h")
@@ -12,4 +14,4 @@ else ()
     set(USE_FASTOPS 0)
 endif ()
 
-message (STATUS "Using fastops")
+message (STATUS "Using fastops=${USE_FASTOPS}: ${FASTOPS_INCLUDE_DIR} : ${FASTOPS_LIBRARY}")

dbms/CMakeLists.txt

@@ -48,7 +48,7 @@ if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
     set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wshadow -Wshadow-uncaptured-local -Wextra-semi -Wcomma -Winconsistent-missing-destructor-override -Wunused-exception-parameter -Wcovered-switch-default -Wold-style-cast -Wrange-loop-analysis -Wunused-member-function -Wunreachable-code -Wunreachable-code-return -Wnewline-eof -Wembedded-directive -Wgnu-case-range -Wunused-macros -Wconditional-uninitialized -Wdeprecated -Wundef -Wreserved-id-macro -Wredundant-parens -Wzero-as-null-pointer-constant")
 
     if (WEVERYTHING)
-        set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Weverything -Wno-c++98-compat -Wno-c++98-compat-pedantic -Wno-padded -Wno-switch-enum -Wno-shadow-field-in-constructor -Wno-deprecated-dynamic-exception-spec -Wno-float-equal -Wno-weak-vtables -Wno-shift-sign-overflow -Wno-sign-conversion -Wno-conversion -Wno-exit-time-destructors -Wno-undefined-func-template -Wno-documentation-unknown-command -Wno-missing-variable-declarations -Wno-unused-template -Wno-global-constructors -Wno-c99-extensions -Wno-missing-prototypes -Wno-weak-template-vtables -Wno-zero-length-array -Wno-gnu-anonymous-struct -Wno-nested-anon-types -Wno-double-promotion -Wno-disabled-macro-expansion -Wno-vla-extension -Wno-vla -Wno-packed")
+        set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Weverything -Wno-c++98-compat -Wno-c++98-compat-pedantic -Wno-padded -Wno-switch-enum -Wno-deprecated-dynamic-exception-spec -Wno-float-equal -Wno-weak-vtables -Wno-shift-sign-overflow -Wno-sign-conversion -Wno-conversion -Wno-exit-time-destructors -Wno-undefined-func-template -Wno-documentation-unknown-command -Wno-missing-variable-declarations -Wno-unused-template -Wno-global-constructors -Wno-c99-extensions -Wno-missing-prototypes -Wno-weak-template-vtables -Wno-zero-length-array -Wno-gnu-anonymous-struct -Wno-nested-anon-types -Wno-double-promotion -Wno-disabled-macro-expansion -Wno-vla-extension -Wno-vla -Wno-packed")
 
         # TODO Enable conversion, sign-conversion, double-promotion warnings.
     endif ()
@@ -71,6 +71,8 @@ if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
             set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-ctad-maybe-unsupported")
         endif ()
     endif ()
+elseif (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+    set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wshadow")
 endif()
 
 if (USE_DEBUG_HELPERS)

dbms/programs/client/Client.cpp

@@ -711,7 +711,7 @@ private:
                     if (ignore_error)
                     {
                         Tokens tokens(begin, end);
-                        TokenIterator token_iterator(tokens);
+                        IParser::Pos token_iterator(tokens);
                         while (token_iterator->type != TokenType::Semicolon && token_iterator.isValid())
                             ++token_iterator;
                         begin = token_iterator->end;

dbms/programs/copier/ClusterCopier.cpp

@@ -123,7 +123,7 @@ enum class TaskState
 struct TaskStateWithOwner
 {
     TaskStateWithOwner() = default;
-    TaskStateWithOwner(TaskState state, const String & owner) : state(state), owner(owner) {}
+    TaskStateWithOwner(TaskState state_, const String & owner_) : state(state_), owner(owner_) {}
 
     TaskState state{TaskState::Unknown};
     String owner;
@@ -2100,9 +2100,9 @@ void ClusterCopierApp::initialize(Poco::Util::Application & self)
 
     // process_id is '<hostname>#<start_timestamp>_<pid>'
     time_t timestamp = Poco::Timestamp().epochTime();
-    auto pid = Poco::Process::id();
+    auto curr_pid = Poco::Process::id();
 
-    process_id = std::to_string(DateLUT::instance().toNumYYYYMMDDhhmmss(timestamp)) + "_" + std::to_string(pid);
+    process_id = std::to_string(DateLUT::instance().toNumYYYYMMDDhhmmss(timestamp)) + "_" + std::to_string(curr_pid);
     host_id = escapeForFileName(getFQDNOrHostName()) + '#' + process_id;
     process_path = Poco::Path(base_dir + "/clickhouse-copier_" + process_id).absolute().toString();
     Poco::File(process_path).createDirectories();

dbms/programs/obfuscator/Obfuscator.cpp

@@ -176,7 +176,7 @@ private:
     const UInt64 seed;
 
 public:
-    UnsignedIntegerModel(UInt64 seed) : seed(seed) {}
+    UnsignedIntegerModel(UInt64 seed_) : seed(seed_) {}
 
     void train(const IColumn &) override {}
     void finalize() override {}
@@ -212,7 +212,7 @@ private:
     const UInt64 seed;
 
 public:
-    SignedIntegerModel(UInt64 seed) : seed(seed) {}
+    SignedIntegerModel(UInt64 seed_) : seed(seed_) {}
 
     void train(const IColumn &) override {}
     void finalize() override {}
@@ -256,7 +256,7 @@ private:
     Float res_prev_value = 0;
 
 public:
-    FloatModel(UInt64 seed) : seed(seed) {}
+    FloatModel(UInt64 seed_) : seed(seed_) {}
 
     void train(const IColumn &) override {}
     void finalize() override {}
@@ -348,7 +348,7 @@ private:
     const UInt64 seed;
 
 public:
-    FixedStringModel(UInt64 seed) : seed(seed) {}
+    FixedStringModel(UInt64 seed_) : seed(seed_) {}
 
     void train(const IColumn &) override {}
     void finalize() override {}
@@ -385,7 +385,7 @@ private:
     const DateLUTImpl & date_lut;
 
 public:
-    DateTimeModel(UInt64 seed) : seed(seed), date_lut(DateLUT::instance()) {}
+    DateTimeModel(UInt64 seed_) : seed(seed_), date_lut(DateLUT::instance()) {}
 
     void train(const IColumn &) override {}
     void finalize() override {}
@@ -533,8 +533,8 @@ private:
     }
 
 public:
-    MarkovModel(MarkovModelParameters params)
+    MarkovModel(MarkovModelParameters params_)
-        : params(std::move(params)), code_points(params.order, BEGIN) {}
+        : params(std::move(params_)), code_points(params.order, BEGIN) {}
 
     void consume(const char * data, size_t size)
     {
@@ -745,7 +745,7 @@ private:
     MarkovModel markov_model;
 
 public:
-    StringModel(UInt64 seed, MarkovModelParameters params) : seed(seed), markov_model(std::move(params)) {}
+    StringModel(UInt64 seed_, MarkovModelParameters params_) : seed(seed_), markov_model(std::move(params_)) {}
 
     void train(const IColumn & column) override
     {
@@ -797,7 +797,7 @@ private:
     ModelPtr nested_model;
 
 public:
-    ArrayModel(ModelPtr nested_model) : nested_model(std::move(nested_model)) {}
+    ArrayModel(ModelPtr nested_model_) : nested_model(std::move(nested_model_)) {}
 
     void train(const IColumn & column) override
     {
@@ -830,7 +830,7 @@ private:
     ModelPtr nested_model;
 
 public:
-    NullableModel(ModelPtr nested_model) : nested_model(std::move(nested_model)) {}
+    NullableModel(ModelPtr nested_model_) : nested_model(std::move(nested_model_)) {}
 
     void train(const IColumn & column) override
     {

dbms/programs/odbc-bridge/ODBCBlockInputStream.cpp

@@ -18,12 +18,12 @@ namespace ErrorCodes
 
 
 ODBCBlockInputStream::ODBCBlockInputStream(
-    Poco::Data::Session && session, const std::string & query_str, const Block & sample_block, const UInt64 max_block_size)
+    Poco::Data::Session && session_, const std::string & query_str, const Block & sample_block, const UInt64 max_block_size_)
-    : session{session}
+    : session{session_}
     , statement{(this->session << query_str, Poco::Data::Keywords::now)}
     , result{statement}
     , iterator{result.begin()}
-    , max_block_size{max_block_size}
+    , max_block_size{max_block_size_}
     , log(&Logger::get("ODBCBlockInputStream"))
 {
     if (sample_block.columns() != result.columnCount())
@@ -43,46 +43,46 @@ namespace
     {
         switch (type)
         {
-            case ValueType::UInt8:
+            case ValueType::vtUInt8:
                 static_cast<ColumnUInt8 &>(column).insertValue(value.convert<UInt64>());
                 break;
-            case ValueType::UInt16:
+            case ValueType::vtUInt16:
                 static_cast<ColumnUInt16 &>(column).insertValue(value.convert<UInt64>());
                 break;
-            case ValueType::UInt32:
+            case ValueType::vtUInt32:
                 static_cast<ColumnUInt32 &>(column).insertValue(value.convert<UInt64>());
                 break;
-            case ValueType::UInt64:
+            case ValueType::vtUInt64:
                 static_cast<ColumnUInt64 &>(column).insertValue(value.convert<UInt64>());
                 break;
-            case ValueType::Int8:
+            case ValueType::vtInt8:
                 static_cast<ColumnInt8 &>(column).insertValue(value.convert<Int64>());
                 break;
-            case ValueType::Int16:
+            case ValueType::vtInt16:
                 static_cast<ColumnInt16 &>(column).insertValue(value.convert<Int64>());
                 break;
-            case ValueType::Int32:
+            case ValueType::vtInt32:
                 static_cast<ColumnInt32 &>(column).insertValue(value.convert<Int64>());
                 break;
-            case ValueType::Int64:
+            case ValueType::vtInt64:
                 static_cast<ColumnInt64 &>(column).insertValue(value.convert<Int64>());
                 break;
-            case ValueType::Float32:
+            case ValueType::vtFloat32:
                 static_cast<ColumnFloat32 &>(column).insertValue(value.convert<Float64>());
                 break;
-            case ValueType::Float64:
+            case ValueType::vtFloat64:
                 static_cast<ColumnFloat64 &>(column).insertValue(value.convert<Float64>());
                 break;
-            case ValueType::String:
+            case ValueType::vtString:
                 static_cast<ColumnString &>(column).insert(value.convert<String>());
                 break;
-            case ValueType::Date:
+            case ValueType::vtDate:
                 static_cast<ColumnUInt16 &>(column).insertValue(UInt16{LocalDate{value.convert<String>()}.getDayNum()});
                 break;
-            case ValueType::DateTime:
+            case ValueType::vtDateTime:
                 static_cast<ColumnUInt32 &>(column).insertValue(time_t{LocalDateTime{value.convert<String>()}});
                 break;
-            case ValueType::UUID:
+            case ValueType::vtUUID:
                 static_cast<ColumnUInt128 &>(column).insert(parse<UUID>(value.convert<std::string>()));
                 break;
         }

dbms/programs/odbc-bridge/ODBCBlockInputStream.h

@@ -16,7 +16,7 @@ class ODBCBlockInputStream final : public IBlockInputStream
 {
 public:
     ODBCBlockInputStream(
-        Poco::Data::Session && session, const std::string & query_str, const Block & sample_block, const UInt64 max_block_size);
+        Poco::Data::Session && session_, const std::string & query_str, const Block & sample_block, const UInt64 max_block_size_);
 
     String getName() const override { return "ODBC"; }
 

dbms/programs/server/MetricsTransmitter.cpp

@@ -16,8 +16,8 @@ namespace DB
 {
 
 MetricsTransmitter::MetricsTransmitter(
-    const Poco::Util::AbstractConfiguration & config, const std::string & config_name, const AsynchronousMetrics & async_metrics)
+    const Poco::Util::AbstractConfiguration & config, const std::string & config_name_, const AsynchronousMetrics & async_metrics_)
-    : async_metrics(async_metrics), config_name(config_name)
+    : async_metrics(async_metrics_), config_name(config_name_)
 {
     interval_seconds = config.getInt(config_name + ".interval", 60);
     send_events = config.getBool(config_name + ".events", true);

dbms/programs/server/MetricsTransmitter.h

@@ -32,7 +32,7 @@ class AsynchronousMetrics;
 class MetricsTransmitter
 {
 public:
-    MetricsTransmitter(const Poco::Util::AbstractConfiguration & config, const std::string & config_name, const AsynchronousMetrics & async_metrics);
+    MetricsTransmitter(const Poco::Util::AbstractConfiguration & config, const std::string & config_name_, const AsynchronousMetrics & async_metrics_);
     ~MetricsTransmitter();
 
 private:

dbms/programs/server/MySQLHandler.cpp

@@ -37,14 +37,14 @@ namespace ErrorCodes
     extern const int OPENSSL_ERROR;
 }
 
-MySQLHandler::MySQLHandler(IServer & server_, const Poco::Net::StreamSocket & socket_, RSA & public_key, RSA & private_key, bool ssl_enabled, size_t connection_id)
+MySQLHandler::MySQLHandler(IServer & server_, const Poco::Net::StreamSocket & socket_, RSA & public_key_, RSA & private_key_, bool ssl_enabled, size_t connection_id_)
     : Poco::Net::TCPServerConnection(socket_)
     , server(server_)
     , log(&Poco::Logger::get("MySQLHandler"))
     , connection_context(server.context())
-    , connection_id(connection_id)
+    , connection_id(connection_id_)
-    , public_key(public_key)
+    , public_key(public_key_)
-    , private_key(private_key)
+    , private_key(private_key_)
 {
     server_capability_flags = CLIENT_PROTOCOL_41 | CLIENT_SECURE_CONNECTION | CLIENT_PLUGIN_AUTH | CLIENT_PLUGIN_AUTH_LENENC_CLIENT_DATA | CLIENT_CONNECT_WITH_DB | CLIENT_DEPRECATE_EOF;
     if (ssl_enabled)

dbms/programs/server/MySQLHandler.h

@@ -14,7 +14,7 @@ namespace DB
 class MySQLHandler : public Poco::Net::TCPServerConnection
 {
 public:
-    MySQLHandler(IServer & server_, const Poco::Net::StreamSocket & socket_, RSA & public_key, RSA & private_key, bool ssl_enabled, size_t connection_id);
+    MySQLHandler(IServer & server_, const Poco::Net::StreamSocket & socket_, RSA & public_key_, RSA & private_key_, bool ssl_enabled, size_t connection_id_);
 
     void run() final;
 

dbms/programs/server/Server.cpp

@@ -29,6 +29,7 @@
 #include <Common/getFQDNOrHostName.h>
 #include <Common/getMultipleKeysFromConfig.h>
 #include <Common/getNumberOfPhysicalCPUCores.h>
+#include <Common/getExecutablePath.h>
 #include <Common/TaskStatsInfoGetter.h>
 #include <Common/ThreadStatus.h>
 #include <IO/HTTPCommon.h>
@@ -156,19 +157,19 @@ std::string Server::getDefaultCorePath() const
     return getCanonicalPath(config().getString("path", DBMS_DEFAULT_PATH)) + "cores";
 }
 
-void Server::defineOptions(Poco::Util::OptionSet & _options)
+void Server::defineOptions(Poco::Util::OptionSet & options)
 {
-    _options.addOption(
+    options.addOption(
         Poco::Util::Option("help", "h", "show help and exit")
             .required(false)
             .repeatable(false)
             .binding("help"));
-    _options.addOption(
+    options.addOption(
         Poco::Util::Option("version", "V", "show version and exit")
             .required(false)
             .repeatable(false)
             .binding("version"));
-    BaseDaemon::defineOptions(_options);
+    BaseDaemon::defineOptions(options);
 }
 
 int Server::main(const std::vector<std::string> & /*args*/)
@@ -212,6 +213,10 @@ int Server::main(const std::vector<std::string> & /*args*/)
     const auto memory_amount = getMemoryAmount();
 
 #if defined(__linux__)
+    std::string executable_path = getExecutablePath();
+    if (executable_path.empty())
+        executable_path = "/usr/bin/clickhouse";    /// It is used for information messages.
+
     /// After full config loaded
     {
         if (config().getBool("mlock_executable", false))
@@ -228,7 +233,7 @@ int Server::main(const std::vector<std::string> & /*args*/)
             {
                 LOG_INFO(log, "It looks like the process has no CAP_IPC_LOCK capability, binary mlock will be disabled."
                     " It could happen due to incorrect ClickHouse package installation."
-                    " You could resolve the problem manually with 'sudo setcap cap_ipc_lock=+ep /usr/bin/clickhouse'."
+                    " You could resolve the problem manually with 'sudo setcap cap_ipc_lock=+ep " << executable_path << "'."
                     " Note that it will not work on 'nosuid' mounted filesystems.");
             }
         }
@@ -547,7 +552,7 @@ int Server::main(const std::vector<std::string> & /*args*/)
     {
         LOG_INFO(log, "It looks like the process has no CAP_NET_ADMIN capability, 'taskstats' performance statistics will be disabled."
             " It could happen due to incorrect ClickHouse package installation."
-            " You could resolve the problem manually with 'sudo setcap cap_net_admin=+ep /usr/bin/clickhouse'."
+            " You could resolve the problem manually with 'sudo setcap cap_net_admin=+ep " << executable_path << "'."
             " Note that it will not work on 'nosuid' mounted filesystems."
             " It also doesn't work if you run clickhouse-server inside network namespace as it happens in some containers.");
     }
@@ -556,7 +561,7 @@ int Server::main(const std::vector<std::string> & /*args*/)
     {
         LOG_INFO(log, "It looks like the process has no CAP_SYS_NICE capability, the setting 'os_thread_nice' will have no effect."
             " It could happen due to incorrect ClickHouse package installation."
-            " You could resolve the problem manually with 'sudo setcap cap_sys_nice=+ep /usr/bin/clickhouse'."
+            " You could resolve the problem manually with 'sudo setcap cap_sys_nice=+ep " << executable_path << "'."
             " Note that it will not work on 'nosuid' mounted filesystems.");
     }
 #else

dbms/src/AggregateFunctions/AggregateFunctionArgMinMax.h

@@ -35,8 +35,8 @@ private:
     const DataTypePtr & type_val;
 
 public:
-    AggregateFunctionArgMinMax(const DataTypePtr & type_res, const DataTypePtr & type_val)
+    AggregateFunctionArgMinMax(const DataTypePtr & type_res_, const DataTypePtr & type_val_)
-        : IAggregateFunctionDataHelper<Data, AggregateFunctionArgMinMax<Data, AllocatesMemoryInArena>>({type_res, type_val}, {}),
+        : IAggregateFunctionDataHelper<Data, AggregateFunctionArgMinMax<Data, AllocatesMemoryInArena>>({type_res_, type_val_}, {}),
         type_res(this->argument_types[0]), type_val(this->argument_types[1])
     {
         if (!type_val->isComparable())

dbms/src/AggregateFunctions/AggregateFunctionCount.h

@@ -62,12 +62,6 @@ public:
         static_cast<ColumnUInt64 &>(to).getData().push_back(data(place).count);
     }
 
-    /// May be used for optimization.
-    void addDelta(AggregateDataPtr place, UInt64 x) const
-    {
-        data(place).count += x;
-    }
-
     const char * getHeaderFilePath() const override { return __FILE__; }
 };
 

dbms/src/AggregateFunctions/AggregateFunctionGroupArray.h

@@ -253,8 +253,8 @@ class GroupArrayGeneralListImpl final
     UInt64 max_elems;
 
 public:
-    GroupArrayGeneralListImpl(const DataTypePtr & data_type, UInt64 max_elems_ = std::numeric_limits<UInt64>::max())
+    GroupArrayGeneralListImpl(const DataTypePtr & data_type_, UInt64 max_elems_ = std::numeric_limits<UInt64>::max())
-        : IAggregateFunctionDataHelper<GroupArrayGeneralListData<Node>, GroupArrayGeneralListImpl<Node, limit_num_elems>>({data_type}, {})
+        : IAggregateFunctionDataHelper<GroupArrayGeneralListData<Node>, GroupArrayGeneralListImpl<Node, limit_num_elems>>({data_type_}, {})
         , data_type(this->argument_types[0]), max_elems(max_elems_) {}
 
     String getName() const override { return "groupArray"; }

dbms/src/AggregateFunctions/AggregateFunctionGroupUniqArray.h

@@ -164,8 +164,8 @@ class AggregateFunctionGroupUniqArrayGeneric
     }
 
 public:
-    AggregateFunctionGroupUniqArrayGeneric(const DataTypePtr & input_data_type, UInt64 max_elems_ = std::numeric_limits<UInt64>::max())
+    AggregateFunctionGroupUniqArrayGeneric(const DataTypePtr & input_data_type_, UInt64 max_elems_ = std::numeric_limits<UInt64>::max())
-        : IAggregateFunctionDataHelper<AggregateFunctionGroupUniqArrayGenericData, AggregateFunctionGroupUniqArrayGeneric<is_plain_column, Tlimit_num_elem>>({input_data_type}, {})
+        : IAggregateFunctionDataHelper<AggregateFunctionGroupUniqArrayGenericData, AggregateFunctionGroupUniqArrayGeneric<is_plain_column, Tlimit_num_elem>>({input_data_type_}, {})
         , input_data_type(this->argument_types[0])
         , max_elems(max_elems_) {}
 

dbms/src/AggregateFunctions/AggregateFunctionHistogram.h

@@ -304,9 +304,9 @@ private:
     const UInt32 max_bins;
 
 public:
-    AggregateFunctionHistogram(UInt32 max_bins, const DataTypes & arguments, const Array & params)
+    AggregateFunctionHistogram(UInt32 max_bins_, const DataTypes & arguments, const Array & params)
         : IAggregateFunctionDataHelper<AggregateFunctionHistogramData, AggregateFunctionHistogram<T>>(arguments, params)
-        , max_bins(max_bins)
+        , max_bins(max_bins_)
     {
     }
 

dbms/src/AggregateFunctions/AggregateFunctionMLMethod.cpp

@@ -104,21 +104,21 @@ void registerAggregateFunctionMLMethod(AggregateFunctionFactory & factory)
 }
 
 LinearModelData::LinearModelData(
-    Float64 learning_rate,
+    Float64 learning_rate_,
-    Float64 l2_reg_coef,
+    Float64 l2_reg_coef_,
-    UInt64 param_num,
+    UInt64 param_num_,
-    UInt64 batch_capacity,
+    UInt64 batch_capacity_,
-    std::shared_ptr<DB::IGradientComputer> gradient_computer,
+    std::shared_ptr<DB::IGradientComputer> gradient_computer_,
-    std::shared_ptr<DB::IWeightsUpdater> weights_updater)
+    std::shared_ptr<DB::IWeightsUpdater> weights_updater_)
-    : learning_rate(learning_rate)
+    : learning_rate(learning_rate_)
-    , l2_reg_coef(l2_reg_coef)
+    , l2_reg_coef(l2_reg_coef_)
-    , batch_capacity(batch_capacity)
+    , batch_capacity(batch_capacity_)
     , batch_size(0)
-    , gradient_computer(std::move(gradient_computer))
+    , gradient_computer(std::move(gradient_computer_))
-    , weights_updater(std::move(weights_updater))
+    , weights_updater(std::move(weights_updater_))
 {
-    weights.resize(param_num, Float64{0.0});
+    weights.resize(param_num_, Float64{0.0});
-    gradient_batch.resize(param_num + 1, Float64{0.0});
+    gradient_batch.resize(param_num_ + 1, Float64{0.0});
 }
 
 void LinearModelData::update_state()

dbms/src/AggregateFunctions/AggregateFunctionMLMethod.h

@@ -248,12 +248,12 @@ public:
     LinearModelData() {}
 
     LinearModelData(
-        Float64 learning_rate,
+        Float64 learning_rate_,
-        Float64 l2_reg_coef,
+        Float64 l2_reg_coef_,
-        UInt64 param_num,
+        UInt64 param_num_,
-        UInt64 batch_capacity,
+        UInt64 batch_capacity_,
-        std::shared_ptr<IGradientComputer> gradient_computer,
+        std::shared_ptr<IGradientComputer> gradient_computer_,
-        std::shared_ptr<IWeightsUpdater> weights_updater);
+        std::shared_ptr<IWeightsUpdater> weights_updater_);
 
     void add(const IColumn ** columns, size_t row_num);
 
@@ -304,21 +304,21 @@ public:
     String getName() const override { return Name::name; }
 
     explicit AggregateFunctionMLMethod(
-        UInt32 param_num,
+        UInt32 param_num_,
-        std::unique_ptr<IGradientComputer> gradient_computer,
+        std::unique_ptr<IGradientComputer> gradient_computer_,
-        std::string weights_updater_name,
+        std::string weights_updater_name_,
-        Float64 learning_rate,
+        Float64 learning_rate_,
-        Float64 l2_reg_coef,
+        Float64 l2_reg_coef_,
-        UInt64 batch_size,
+        UInt64 batch_size_,
         const DataTypes & arguments_types,
         const Array & params)
         : IAggregateFunctionDataHelper<Data, AggregateFunctionMLMethod<Data, Name>>(arguments_types, params)
-        , param_num(param_num)
+        , param_num(param_num_)
-        , learning_rate(learning_rate)
+        , learning_rate(learning_rate_)
-        , l2_reg_coef(l2_reg_coef)
+        , l2_reg_coef(l2_reg_coef_)
-        , batch_size(batch_size)
+        , batch_size(batch_size_)
-        , gradient_computer(std::move(gradient_computer))
+        , gradient_computer(std::move(gradient_computer_))
-        , weights_updater_name(std::move(weights_updater_name))
+        , weights_updater_name(std::move(weights_updater_name_))
     {
     }
 

dbms/src/AggregateFunctions/AggregateFunctionMinMaxAny.h

@@ -679,8 +679,8 @@ private:
     DataTypePtr & type;
 
 public:
-    AggregateFunctionsSingleValue(const DataTypePtr & type)
+    AggregateFunctionsSingleValue(const DataTypePtr & type_)
-        : IAggregateFunctionDataHelper<Data, AggregateFunctionsSingleValue<Data, AllocatesMemoryInArena>>({type}, {})
+        : IAggregateFunctionDataHelper<Data, AggregateFunctionsSingleValue<Data, AllocatesMemoryInArena>>({type_}, {})
         , type(this->argument_types[0])
     {
         if (StringRef(Data::name()) == StringRef("min")

dbms/src/AggregateFunctions/AggregateFunctionQuantile.h

@@ -76,8 +76,8 @@ private:
     DataTypePtr & argument_type;
 
 public:
-    AggregateFunctionQuantile(const DataTypePtr & argument_type, const Array & params)
+    AggregateFunctionQuantile(const DataTypePtr & argument_type_, const Array & params)
-        : IAggregateFunctionDataHelper<Data, AggregateFunctionQuantile<Value, Data, Name, has_second_arg, FloatReturnType, returns_many>>({argument_type}, params)
+        : IAggregateFunctionDataHelper<Data, AggregateFunctionQuantile<Value, Data, Name, has_second_arg, FloatReturnType, returns_many>>({argument_type_}, params)
         , levels(params, returns_many), level(levels.levels[0]), argument_type(this->argument_types[0])
     {
         if (!returns_many && levels.size() > 1)

dbms/src/AggregateFunctions/AggregateFunctionResample.h

@@ -33,18 +33,18 @@ private:
 
 public:
     AggregateFunctionResample(
-        AggregateFunctionPtr nested_function,
+        AggregateFunctionPtr nested_function_,
-        Key begin,
+        Key begin_,
-        Key end,
+        Key end_,
-        size_t step,
+        size_t step_,
         const DataTypes & arguments,
         const Array & params)
         : IAggregateFunctionHelper<AggregateFunctionResample<Key>>{arguments, params}
-        , nested_function{nested_function}
+        , nested_function{nested_function_}
         , last_col{arguments.size() - 1}
-        , begin{begin}
+        , begin{begin_}
-        , end{end}
+        , end{end_}
-        , step{step}
+        , step{step_}
         , total{0}
         , aod{nested_function->alignOfData()}
         , sod{(nested_function->sizeOfData() + aod - 1) / aod * aod}

dbms/src/AggregateFunctions/AggregateFunctionSequenceMatch.h

@@ -142,9 +142,9 @@ template <typename T, typename Data, typename Derived>
 class AggregateFunctionSequenceBase : public IAggregateFunctionDataHelper<Data, Derived>
 {
 public:
-    AggregateFunctionSequenceBase(const DataTypes & arguments, const Array & params, const String & pattern)
+    AggregateFunctionSequenceBase(const DataTypes & arguments, const Array & params, const String & pattern_)
         : IAggregateFunctionDataHelper<Data, Derived>(arguments, params)
-        , pattern(pattern)
+        , pattern(pattern_)
     {
         arg_count = arguments.size();
         parsePattern();
@@ -199,7 +199,7 @@ private:
         std::uint64_t extra;
 
         PatternAction() = default;
-        PatternAction(const PatternActionType type, const std::uint64_t extra = 0) : type{type}, extra{extra} {}
+        PatternAction(const PatternActionType type_, const std::uint64_t extra_ = 0) : type{type_}, extra{extra_} {}
     };
 
     using PatternActions = PODArrayWithStackMemory<PatternAction, 64>;
@@ -520,8 +520,8 @@ private:
 
     struct DFAState
     {
-        DFAState(bool has_kleene = false)
+        DFAState(bool has_kleene_ = false)
-            : has_kleene{has_kleene}, event{0}, transition{DFATransition::None}
+            : has_kleene{has_kleene_}, event{0}, transition{DFATransition::None}
         {}
 
         ///   .-------.
@@ -554,8 +554,8 @@ template <typename T, typename Data>
 class AggregateFunctionSequenceMatch final : public AggregateFunctionSequenceBase<T, Data, AggregateFunctionSequenceMatch<T, Data>>
 {
 public:
-    AggregateFunctionSequenceMatch(const DataTypes & arguments, const Array & params, const String & pattern)
+    AggregateFunctionSequenceMatch(const DataTypes & arguments, const Array & params, const String & pattern_)
-        : AggregateFunctionSequenceBase<T, Data, AggregateFunctionSequenceMatch<T, Data>>(arguments, params, pattern) {}
+        : AggregateFunctionSequenceBase<T, Data, AggregateFunctionSequenceMatch<T, Data>>(arguments, params, pattern_) {}
 
     using AggregateFunctionSequenceBase<T, Data, AggregateFunctionSequenceMatch<T, Data>>::AggregateFunctionSequenceBase;
 
@@ -582,8 +582,8 @@ template <typename T, typename Data>
 class AggregateFunctionSequenceCount final : public AggregateFunctionSequenceBase<T, Data, AggregateFunctionSequenceCount<T, Data>>
 {
 public:
-    AggregateFunctionSequenceCount(const DataTypes & arguments, const Array & params, const String & pattern)
+    AggregateFunctionSequenceCount(const DataTypes & arguments, const Array & params, const String & pattern_)
-        : AggregateFunctionSequenceBase<T, Data, AggregateFunctionSequenceCount<T, Data>>(arguments, params, pattern) {}
+        : AggregateFunctionSequenceBase<T, Data, AggregateFunctionSequenceCount<T, Data>>(arguments, params, pattern_) {}
 
     using AggregateFunctionSequenceBase<T, Data, AggregateFunctionSequenceCount<T, Data>>::AggregateFunctionSequenceBase;
 

dbms/src/AggregateFunctions/AggregateFunctionState.h

@@ -23,9 +23,9 @@ private:
     Array params;
 
 public:
-    AggregateFunctionState(AggregateFunctionPtr nested, const DataTypes & arguments, const Array & params)
+    AggregateFunctionState(AggregateFunctionPtr nested_, const DataTypes & arguments_, const Array & params_)
-        : IAggregateFunctionHelper<AggregateFunctionState>(arguments, params)
+        : IAggregateFunctionHelper<AggregateFunctionState>(arguments_, params_)
-        , nested_func(nested), arguments(arguments), params(params) {}
+        , nested_func(nested_), arguments(arguments_), params(params_) {}
 
     String getName() const override
     {

dbms/src/AggregateFunctions/AggregateFunctionSumMap.h

@@ -62,10 +62,10 @@ private:
 
 public:
     AggregateFunctionSumMapBase(
-        const DataTypePtr & keys_type, const DataTypes & values_types,
+        const DataTypePtr & keys_type_, const DataTypes & values_types_,
         const DataTypes & argument_types_, const Array & params_)
         : IAggregateFunctionDataHelper<AggregateFunctionSumMapData<NearestFieldType<T>>, Derived>(argument_types_, params_)
-        , keys_type(keys_type), values_types(values_types) {}
+        , keys_type(keys_type_), values_types(values_types_) {}
 
     String getName() const override { return "sumMap"; }
 
@@ -295,9 +295,9 @@ private:
 
 public:
     AggregateFunctionSumMapFiltered(
-        const DataTypePtr & keys_type, const DataTypes & values_types, const Array & keys_to_keep_,
+        const DataTypePtr & keys_type_, const DataTypes & values_types_, const Array & keys_to_keep_,
         const DataTypes & argument_types_, const Array & params_)
-        : Base{keys_type, values_types, argument_types_, params_}
+        : Base{keys_type_, values_types_, argument_types_, params_}
     {
         keys_to_keep.reserve(keys_to_keep_.size());
         for (const Field & f : keys_to_keep_)

dbms/src/AggregateFunctions/AggregateFunctionTopK.h

@@ -44,9 +44,9 @@ protected:
     UInt64 reserved;
 
 public:
-    AggregateFunctionTopK(UInt64 threshold, UInt64 load_factor, const DataTypes & argument_types_, const Array & params)
+    AggregateFunctionTopK(UInt64 threshold_, UInt64 load_factor, const DataTypes & argument_types_, const Array & params)
         : IAggregateFunctionDataHelper<AggregateFunctionTopKData<T>, AggregateFunctionTopK<T, is_weighted>>(argument_types_, params)
-        , threshold(threshold), reserved(load_factor * threshold) {}
+        , threshold(threshold_), reserved(load_factor * threshold) {}
 
     String getName() const override { return is_weighted ? "topKWeighted" : "topK"; }
 
@@ -139,9 +139,9 @@ private:
 
 public:
     AggregateFunctionTopKGeneric(
-        UInt64 threshold, UInt64 load_factor, const DataTypePtr & input_data_type, const Array & params)
+        UInt64 threshold_, UInt64 load_factor, const DataTypePtr & input_data_type_, const Array & params)
-        : IAggregateFunctionDataHelper<AggregateFunctionTopKGenericData, AggregateFunctionTopKGeneric<is_plain_column, is_weighted>>({input_data_type}, params)
+        : IAggregateFunctionDataHelper<AggregateFunctionTopKGenericData, AggregateFunctionTopKGeneric<is_plain_column, is_weighted>>({input_data_type_}, params)
-        , threshold(threshold), reserved(load_factor * threshold), input_data_type(this->argument_types[0]) {}
+        , threshold(threshold_), reserved(load_factor * threshold), input_data_type(this->argument_types[0]) {}
 
     String getName() const override { return is_weighted ? "topKWeighted" : "topK"; }
 

dbms/src/AggregateFunctions/AggregateFunctionUniqUpTo.h

@@ -136,9 +136,9 @@ private:
     UInt8 threshold;
 
 public:
-    AggregateFunctionUniqUpTo(UInt8 threshold, const DataTypes & argument_types_, const Array & params_)
+    AggregateFunctionUniqUpTo(UInt8 threshold_, const DataTypes & argument_types_, const Array & params_)
         : IAggregateFunctionDataHelper<AggregateFunctionUniqUpToData<T>, AggregateFunctionUniqUpTo<T>>(argument_types_, params_)
-        , threshold(threshold)
+        , threshold(threshold_)
     {
     }
 
@@ -196,9 +196,9 @@ private:
     UInt8 threshold;
 
 public:
-    AggregateFunctionUniqUpToVariadic(const DataTypes & arguments, const Array & params, UInt8 threshold)
+    AggregateFunctionUniqUpToVariadic(const DataTypes & arguments, const Array & params, UInt8 threshold_)
         : IAggregateFunctionDataHelper<AggregateFunctionUniqUpToData<UInt64>, AggregateFunctionUniqUpToVariadic<is_exact, argument_is_tuple>>(arguments, params)
-        , threshold(threshold)
+        , threshold(threshold_)
     {
         if (argument_is_tuple)
             num_args = typeid_cast<const DataTypeTuple &>(*arguments[0]).getElements().size();

dbms/src/AggregateFunctions/IAggregateFunction.h

@@ -128,6 +128,15 @@ public:
     using AddFunc = void (*)(const IAggregateFunction *, AggregateDataPtr, const IColumn **, size_t, Arena *);
     virtual AddFunc getAddressOfAddFunction() const = 0;
 
+    /** Contains a loop with calls to "add" function. You can collect arguments into array "places"
+      *  and do a single call to "addBatch" for devirtualization and inlining.
+      */
+    virtual void addBatch(size_t batch_size, AggregateDataPtr * places, size_t place_offset, const IColumn ** columns, Arena * arena) const = 0;
+
+    /** The same for single place.
+      */
+    virtual void addBatchSinglePlace(size_t batch_size, AggregateDataPtr place, const IColumn ** columns, Arena * arena) const = 0;
+
     /** This is used for runtime code generation to determine, which header files to include in generated source.
       * Always implement it as
       * const char * getHeaderFilePath() const override { return __FILE__; }
@@ -156,7 +165,20 @@ private:
 public:
     IAggregateFunctionHelper(const DataTypes & argument_types_, const Array & parameters_)
         : IAggregateFunction(argument_types_, parameters_) {}
+
     AddFunc getAddressOfAddFunction() const override { return &addFree; }
+
+    void addBatch(size_t batch_size, AggregateDataPtr * places, size_t place_offset, const IColumn ** columns, Arena * arena) const override
+    {
+        for (size_t i = 0; i < batch_size; ++i)
+            static_cast<const Derived *>(this)->add(places[i] + place_offset, columns, i, arena);
+    }
+
+    void addBatchSinglePlace(size_t batch_size, AggregateDataPtr place, const IColumn ** columns, Arena * arena) const override
+    {
+        for (size_t i = 0; i < batch_size; ++i)
+            static_cast<const Derived *>(this)->add(place, columns, i, arena);
+    }
 };
 
 

dbms/src/AggregateFunctions/QuantileTDigest.h

@@ -50,9 +50,9 @@ class QuantileTDigest
 
         Centroid() = default;
 
-        explicit Centroid(Value mean, Count count)
+        explicit Centroid(Value mean_, Count count_)
-            : mean(mean)
+            : mean(mean_)
-            , count(count)
+            , count(count_)
         {}
 
         Centroid & operator+=(const Centroid & other)

dbms/src/AggregateFunctions/ReservoirSamplerDeterministic.h

@@ -53,8 +53,8 @@ class ReservoirSamplerDeterministic
     }
 
 public:
-    ReservoirSamplerDeterministic(const size_t sample_count = DEFAULT_SAMPLE_COUNT)
+    ReservoirSamplerDeterministic(const size_t sample_count_ = DEFAULT_SAMPLE_COUNT)
-        : sample_count{sample_count}
+        : sample_count{sample_count_}
     {
     }
 

dbms/src/Columns/ColumnConst.cpp

@@ -13,8 +13,8 @@ namespace ErrorCodes
     extern const int SIZES_OF_COLUMNS_DOESNT_MATCH;
 }
 
-ColumnConst::ColumnConst(const ColumnPtr & data_, size_t s)
+ColumnConst::ColumnConst(const ColumnPtr & data_, size_t s_)
-    : data(data_), s(s)
+    : data(data_), s(s_)
 {
     /// Squash Const of Const.
     while (const ColumnConst * const_data = typeid_cast<const ColumnConst *>(data.get()))

dbms/src/Columns/ColumnConst.h

@@ -26,7 +26,7 @@ private:
     WrappedPtr data;
     size_t s;
 
-    ColumnConst(const ColumnPtr & data, size_t s);
+    ColumnConst(const ColumnPtr & data, size_t s_);
     ColumnConst(const ColumnConst & src) = default;
 
 public:

dbms/src/Columns/ColumnFunction.cpp

@@ -13,8 +13,8 @@ namespace ErrorCodes
     extern const int LOGICAL_ERROR;
 }
 
-ColumnFunction::ColumnFunction(size_t size, FunctionBasePtr function, const ColumnsWithTypeAndName & columns_to_capture)
+ColumnFunction::ColumnFunction(size_t size, FunctionBasePtr function_, const ColumnsWithTypeAndName & columns_to_capture)
-        : size_(size), function(function)
+        : size_(size), function(function_)
 {
     appendArguments(columns_to_capture);
 }

dbms/src/Columns/ColumnFunction.h

@@ -20,7 +20,7 @@ class ColumnFunction final : public COWHelper<IColumn, ColumnFunction>
 private:
     friend class COWHelper<IColumn, ColumnFunction>;
 
-    ColumnFunction(size_t size, FunctionBasePtr function, const ColumnsWithTypeAndName & columns_to_capture);
+    ColumnFunction(size_t size, FunctionBasePtr function_, const ColumnsWithTypeAndName & columns_to_capture);
 
 public:
     const char * getFamilyName() const override { return "Function"; }

dbms/src/Columns/ColumnLowCardinality.cpp

@@ -360,12 +360,12 @@ bool ColumnLowCardinality::containsNull() const
 
 ColumnLowCardinality::Index::Index() : positions(ColumnUInt8::create()), size_of_type(sizeof(UInt8)) {}
 
-ColumnLowCardinality::Index::Index(MutableColumnPtr && positions) : positions(std::move(positions))
+ColumnLowCardinality::Index::Index(MutableColumnPtr && positions_) : positions(std::move(positions_))
 {
     updateSizeOfType();
 }
 
-ColumnLowCardinality::Index::Index(ColumnPtr positions) : positions(std::move(positions))
+ColumnLowCardinality::Index::Index(ColumnPtr positions_) : positions(std::move(positions_))
 {
     updateSizeOfType();
 }

dbms/src/Columns/ColumnLowCardinality.h

@@ -201,8 +201,8 @@ public:
     public:
         Index();
         Index(const Index & other) = default;
-        explicit Index(MutableColumnPtr && positions);
+        explicit Index(MutableColumnPtr && positions_);
-        explicit Index(ColumnPtr positions);
+        explicit Index(ColumnPtr positions_);
 
         const ColumnPtr & getPositions() const { return positions; }
         WrappedPtr & getPositionsPtr() { return positions; }

dbms/src/Columns/ColumnTuple.cpp

@@ -257,8 +257,8 @@ struct ColumnTuple::Less
     TupleColumns columns;
     int nan_direction_hint;
 
-    Less(const TupleColumns & columns, int nan_direction_hint_)
+    Less(const TupleColumns & columns_, int nan_direction_hint_)
-        : columns(columns), nan_direction_hint(nan_direction_hint_)
+        : columns(columns_), nan_direction_hint(nan_direction_hint_)
     {
     }
 

dbms/src/Columns/ColumnUnique.h

@@ -186,10 +186,10 @@ ColumnUnique<ColumnType>::ColumnUnique(const IDataType & type)
 }
 
 template <typename ColumnType>
-ColumnUnique<ColumnType>::ColumnUnique(MutableColumnPtr && holder, bool is_nullable)
+ColumnUnique<ColumnType>::ColumnUnique(MutableColumnPtr && holder, bool is_nullable_)
     : column_holder(std::move(holder))
-    , is_nullable(is_nullable)
+    , is_nullable(is_nullable_)
-    , index(numSpecialValues(is_nullable), 0)
+    , index(numSpecialValues(is_nullable_), 0)
 {
     if (column_holder->size() < numSpecialValues())
         throw Exception("Too small holder column for ColumnUnique.", ErrorCodes::ILLEGAL_COLUMN);

dbms/src/Columns/ReverseIndex.h

@@ -235,8 +235,8 @@ template <typename IndexType, typename ColumnType>
 class ReverseIndex
 {
 public:
-    explicit ReverseIndex(UInt64 num_prefix_rows_to_skip, UInt64 base_index)
+    explicit ReverseIndex(UInt64 num_prefix_rows_to_skip_, UInt64 base_index_)
-            : num_prefix_rows_to_skip(num_prefix_rows_to_skip), base_index(base_index), saved_hash_ptr(nullptr) {}
+            : num_prefix_rows_to_skip(num_prefix_rows_to_skip_), base_index(base_index_), saved_hash_ptr(nullptr) {}
 
     void setColumn(ColumnType * column_);
 

dbms/src/Common/ColumnsHashing.h

@@ -243,11 +243,11 @@ struct HashMethodSingleLowCardinalityColumn : public SingleColumnMethod
             throw Exception("Cache wasn't created for HashMethodSingleLowCardinalityColumn",
                             ErrorCodes::LOGICAL_ERROR);
 
-        LowCardinalityDictionaryCache * cache;
+        LowCardinalityDictionaryCache * lcd_cache;
         if constexpr (use_cache)
         {
-            cache = typeid_cast<LowCardinalityDictionaryCache *>(context.get());
+            lcd_cache = typeid_cast<LowCardinalityDictionaryCache *>(context.get());
-            if (!cache)
+            if (!lcd_cache)
             {
                 const auto & cached_val = *context;
                 throw Exception("Invalid type for HashMethodSingleLowCardinalityColumn cache: "
@@ -267,7 +267,7 @@ struct HashMethodSingleLowCardinalityColumn : public SingleColumnMethod
         {
             dictionary_key = {column->getDictionary().getHash(), dict->size()};
             if constexpr (use_cache)
-                cached_values = cache->get(dictionary_key);
+                cached_values = lcd_cache->get(dictionary_key);
         }
 
         if (cached_values)
@@ -288,7 +288,7 @@ struct HashMethodSingleLowCardinalityColumn : public SingleColumnMethod
                     cached_values->saved_hash = saved_hash;
                     cached_values->dictionary_holder = dictionary_holder;
 
-                    cache->set(dictionary_key, cached_values);
+                    lcd_cache->set(dictionary_key, cached_values);
                 }
             }
         }
@@ -470,8 +470,8 @@ struct HashMethodKeysFixed
     Sizes key_sizes;
     size_t keys_size;
 
-    HashMethodKeysFixed(const ColumnRawPtrs & key_columns, const Sizes & key_sizes, const HashMethodContextPtr &)
+    HashMethodKeysFixed(const ColumnRawPtrs & key_columns, const Sizes & key_sizes_, const HashMethodContextPtr &)
-        : Base(key_columns), key_sizes(std::move(key_sizes)), keys_size(key_columns.size())
+        : Base(key_columns), key_sizes(std::move(key_sizes_)), keys_size(key_columns.size())
     {
         if constexpr (has_low_cardinality)
         {
@@ -525,8 +525,8 @@ struct HashMethodSerialized
     ColumnRawPtrs key_columns;
     size_t keys_size;
 
-    HashMethodSerialized(const ColumnRawPtrs & key_columns, const Sizes & /*key_sizes*/, const HashMethodContextPtr &)
+    HashMethodSerialized(const ColumnRawPtrs & key_columns_, const Sizes & /*key_sizes*/, const HashMethodContextPtr &)
-        : key_columns(key_columns), keys_size(key_columns.size()) {}
+        : key_columns(key_columns_), keys_size(key_columns_.size()) {}
 
 protected:
     friend class columns_hashing_impl::HashMethodBase<Self, Value, Mapped, false>;
@@ -550,8 +550,8 @@ struct HashMethodHashed
 
     ColumnRawPtrs key_columns;
 
-    HashMethodHashed(ColumnRawPtrs key_columns, const Sizes &, const HashMethodContextPtr &)
+    HashMethodHashed(ColumnRawPtrs key_columns_, const Sizes &, const HashMethodContextPtr &)
-        : key_columns(std::move(key_columns)) {}
+        : key_columns(std::move(key_columns_)) {}
 
     ALWAYS_INLINE Key getKey(size_t row, Arena &) const { return hash128(row, key_columns.size(), key_columns); }
 

dbms/src/Common/ColumnsHashingImpl.h

@@ -56,8 +56,8 @@ class EmplaceResultImpl
     bool inserted;
 
 public:
-    EmplaceResultImpl(Mapped & value, Mapped & cached_value, bool inserted)
+    EmplaceResultImpl(Mapped & value_, Mapped & cached_value_, bool inserted_)
-            : value(value), cached_value(cached_value), inserted(inserted) {}
+            : value(value_), cached_value(cached_value_), inserted(inserted_) {}
 
     bool isInserted() const { return inserted; }
     auto & getMapped() const { return value; }
@@ -75,7 +75,7 @@ class EmplaceResultImpl<void>
     bool inserted;
 
 public:
-    explicit EmplaceResultImpl(bool inserted) : inserted(inserted) {}
+    explicit EmplaceResultImpl(bool inserted_) : inserted(inserted_) {}
     bool isInserted() const { return inserted; }
 };
 
@@ -86,7 +86,7 @@ class FindResultImpl
     bool found;
 
 public:
-    FindResultImpl(Mapped * value, bool found) : value(value), found(found) {}
+    FindResultImpl(Mapped * value_, bool found_) : value(value_), found(found_) {}
     bool isFound() const { return found; }
     Mapped & getMapped() const { return *value; }
 };
@@ -97,7 +97,7 @@ class FindResultImpl<void>
     bool found;
 
 public:
-    explicit FindResultImpl(bool found) : found(found) {}
+    explicit FindResultImpl(bool found_) : found(found_) {}
     bool isFound() const { return found; }
 };
 

dbms/src/Common/CurrentMetrics.h

@@ -59,15 +59,15 @@ namespace CurrentMetrics
         std::atomic<Value> * what;
         Value amount;
 
-        Increment(std::atomic<Value> * what, Value amount)
+        Increment(std::atomic<Value> * what_, Value amount_)
-            : what(what), amount(amount)
+            : what(what_), amount(amount_)
         {
             *what += amount;
         }
 
     public:
-        Increment(Metric metric, Value amount = 1)
+        Increment(Metric metric, Value amount_ = 1)
-            : Increment(&values[metric], amount) {}
+            : Increment(&values[metric], amount_) {}
 
         ~Increment()
         {

dbms/src/Common/Elf.cpp

@@ -55,8 +55,8 @@ Elf::Elf(const std::string & path)
 }
 
 
-Elf::Section::Section(const ElfShdr & header, const Elf & elf)
+Elf::Section::Section(const ElfShdr & header_, const Elf & elf_)
-    : header(header), elf(elf)
+    : header(header_), elf(elf_)
 {
 }
 

dbms/src/Common/Elf.h

@@ -35,7 +35,7 @@ public:
         const char * end() const;
         size_t size() const;
 
-        Section(const ElfShdr & header, const Elf & elf);
+        Section(const ElfShdr & header_, const Elf & elf_);
 
     private:
         const Elf & elf;

dbms/src/Common/ErrorCodes.cpp

@@ -442,6 +442,7 @@ namespace ErrorCodes
     extern const int CANNOT_PARSE_DWARF = 465;
     extern const int INSECURE_PATH = 466;
     extern const int CANNOT_PARSE_BOOL = 467;
+    extern const int CANNOT_PTHREAD_ATTR = 468;
 
     extern const int KEEPER_EXCEPTION = 999;
     extern const int POCO_EXCEPTION = 1000;

dbms/src/Common/FieldVisitors.cpp

@@ -167,7 +167,7 @@ String FieldVisitorToString::operator() (const Tuple & x_def) const
 }
 
 
-FieldVisitorHash::FieldVisitorHash(SipHash & hash) : hash(hash) {}
+FieldVisitorHash::FieldVisitorHash(SipHash & hash_) : hash(hash_) {}
 
 void FieldVisitorHash::operator() (const Null &) const
 {

dbms/src/Common/FieldVisitors.h

@@ -222,7 +222,7 @@ class FieldVisitorHash : public StaticVisitor<>
 private:
     SipHash & hash;
 public:
-    FieldVisitorHash(SipHash & hash);
+    FieldVisitorHash(SipHash & hash_);
 
     void operator() (const Null & x) const;
     void operator() (const UInt64 & x) const;

dbms/src/Common/MemoryTracker.h

@@ -31,9 +31,9 @@ class MemoryTracker
     const char * description = nullptr;
 
 public:
-    MemoryTracker(VariableContext level = VariableContext::Thread) : level(level) {}
+    MemoryTracker(VariableContext level_ = VariableContext::Thread) : level(level_) {}
-    MemoryTracker(Int64 limit_, VariableContext level = VariableContext::Thread) : limit(limit_), level(level) {}
+    MemoryTracker(Int64 limit_, VariableContext level_ = VariableContext::Thread) : limit(limit_), level(level_) {}
-    MemoryTracker(MemoryTracker * parent_, VariableContext level = VariableContext::Thread) : parent(parent_), level(level) {}
+    MemoryTracker(MemoryTracker * parent_, VariableContext level_ = VariableContext::Thread) : parent(parent_), level(level_) {}
 
     ~MemoryTracker();
 

dbms/src/Common/ProfileEvents.cpp

@@ -191,10 +191,10 @@ Counters global_counters(global_counters_array);
 const Event Counters::num_counters = END;
 
 
-Counters::Counters(VariableContext level, Counters * parent)
+Counters::Counters(VariableContext level_, Counters * parent_)
     : counters_holder(new Counter[num_counters] {}),
-      parent(parent),
+      parent(parent_),
-      level(level)
+      level(level_)
 {
     counters = counters_holder.get();
 }

dbms/src/Common/ProfileEvents.h

@@ -33,7 +33,7 @@ namespace ProfileEvents
         VariableContext level = VariableContext::Thread;
 
         /// By default, any instance have to increment global counters
-        Counters(VariableContext level = VariableContext::Thread, Counters * parent = &global_counters);
+        Counters(VariableContext level_ = VariableContext::Thread, Counters * parent_ = &global_counters);
 
         /// Global level static initializer
         Counters(Counter * allocated_counters)

dbms/src/Common/QueryProfiler.cpp

@@ -127,9 +127,9 @@ namespace ErrorCodes
 }
 
 template <typename ProfilerImpl>
-QueryProfilerBase<ProfilerImpl>::QueryProfilerBase(const Int32 thread_id, const int clock_type, UInt32 period, const int pause_signal)
+QueryProfilerBase<ProfilerImpl>::QueryProfilerBase(const Int32 thread_id, const int clock_type, UInt32 period, const int pause_signal_)
     : log(&Logger::get("QueryProfiler"))
-    , pause_signal(pause_signal)
+    , pause_signal(pause_signal_)
 {
 #if USE_INTERNAL_UNWIND_LIBRARY
     /// Sanity check.

dbms/src/Common/QueryProfiler.h

@@ -35,7 +35,7 @@ template <typename ProfilerImpl>
 class QueryProfilerBase
 {
 public:
-    QueryProfilerBase(const Int32 thread_id, const int clock_type, UInt32 period, const int pause_signal);
+    QueryProfilerBase(const Int32 thread_id, const int clock_type, UInt32 period, const int pause_signal_);
     ~QueryProfilerBase();
 
 private:

dbms/src/Common/RWLock.cpp

@@ -161,9 +161,9 @@ RWLockImpl::LockHolderImpl::~LockHolderImpl()
 }
 
 
-RWLockImpl::LockHolderImpl::LockHolderImpl(RWLock && parent, RWLockImpl::GroupsContainer::iterator it_group,
+RWLockImpl::LockHolderImpl::LockHolderImpl(RWLock && parent_, RWLockImpl::GroupsContainer::iterator it_group_,
-                                             RWLockImpl::ClientsContainer::iterator it_client)
+                                             RWLockImpl::ClientsContainer::iterator it_client_)
-    : parent{std::move(parent)}, it_group{it_group}, it_client{it_client},
+    : parent{std::move(parent_)}, it_group{it_group_}, it_client{it_client_},
       active_client_increment{(*it_client == RWLockImpl::Read) ? CurrentMetrics::RWLockActiveReaders
                                                                : CurrentMetrics::RWLockActiveWriters}
 {}

dbms/src/Common/RWLock.h

@@ -68,7 +68,7 @@ private:
 
         std::condition_variable cv; /// all clients of the group wait group condvar
 
-        explicit Group(Type type) : type{type} {}
+        explicit Group(Type type_) : type{type_} {}
     };
 
     mutable std::mutex mutex;

dbms/src/Common/ShellCommand.cpp

@@ -34,13 +34,13 @@ namespace ErrorCodes
     extern const int CANNOT_CREATE_CHILD_PROCESS;
 }
 
-ShellCommand::ShellCommand(pid_t pid, int in_fd, int out_fd, int err_fd, bool terminate_in_destructor_)
+ShellCommand::ShellCommand(pid_t pid_, int in_fd_, int out_fd_, int err_fd_, bool terminate_in_destructor_)
-    : pid(pid)
+    : pid(pid_)
     , terminate_in_destructor(terminate_in_destructor_)
     , log(&Poco::Logger::get("ShellCommand"))
-    , in(in_fd)
+    , in(in_fd_)
-    , out(out_fd)
+    , out(out_fd_)
-    , err(err_fd) {}
+    , err(err_fd_) {}
 
 ShellCommand::~ShellCommand()
 {

dbms/src/Common/ShellCommand.h

@@ -32,7 +32,7 @@ private:
 
     Poco::Logger * log;
 
-    ShellCommand(pid_t pid, int in_fd, int out_fd, int err_fd, bool terminate_in_destructor_);
+    ShellCommand(pid_t pid_, int in_fd_, int out_fd_, int err_fd_, bool terminate_in_destructor_);
 
     static std::unique_ptr<ShellCommand> executeImpl(const char * filename, char * const argv[], bool pipe_stdin_only, bool terminate_in_destructor);
 

dbms/src/Common/SpaceSaving.h

@@ -113,7 +113,8 @@ public:
         }
 
         TKey key;
-        size_t slot, hash;
+        size_t slot;
+        size_t hash;
         UInt64 count;
         UInt64 error;
     };
@@ -147,15 +148,13 @@ public:
     void insert(const TKey & key, UInt64 increment = 1, UInt64 error = 0)
     {
         // Increase weight of a key that already exists
-        // It uses hashtable for both value mapping as a presence test (c_i != 0)
         auto hash = counter_map.hash(key);
-        auto it = counter_map.find(key, hash);
+        auto counter = findCounter(key, hash);
-        if (it != counter_map.end())
+        if (counter)
         {
-            auto c = it->getSecond();
+            counter->count += increment;
-            c->count += increment;
+            counter->error += error;
-            c->error += error;
+            percolate(counter);
-            percolate(c);
             return;
         }
         // Key doesn't exist, but can fit in the top K
@@ -177,6 +176,7 @@ public:
             push(new Counter(arena.emplace(key), increment, error, hash));
             return;
         }
+
         const size_t alpha_mask = alpha_map.size() - 1;
         auto & alpha = alpha_map[hash & alpha_mask];
         if (alpha + increment < min->count)
@@ -187,22 +187,9 @@ public:
 
         // Erase the current minimum element
         alpha_map[min->hash & alpha_mask] = min->count;
-        it = counter_map.find(min->key, min->hash);
+        destroyLastElement();
 
-        // Replace minimum with newly inserted element
+        push(new Counter(arena.emplace(key), alpha + increment, alpha + error, hash));
-        if (it != counter_map.end())
-        {
-            arena.free(min->key);
-            min->hash = hash;
-            min->key = arena.emplace(key);
-            min->count = alpha + increment;
-            min->error = alpha + error;
-            percolate(min);
-
-            it->getSecond() = min;
-            it->getFirstMutable() = min->key;
-            counter_map.reinsert(it, hash);
-        }
     }
 
     /*
@@ -242,17 +229,35 @@ public:
         // The list is sorted in descending order, we have to scan in reverse
         for (auto counter : boost::adaptors::reverse(rhs.counter_list))
         {
-            if (counter_map.find(counter->key) != counter_map.end())
+            size_t hash = counter_map.hash(counter->key);
+            if (auto current = findCounter(counter->key, hash))
             {
                 // Subtract m2 previously added, guaranteed not negative
-                insert(counter->key, counter->count - m2, counter->error - m2);
+                current->count += (counter->count - m2);
+                current->error += (counter->error - m2);
             }
             else
             {
                 // Counters not monitored in S1
-                insert(counter->key, counter->count + m1, counter->error + m1);
+                counter_list.push_back(new Counter(arena.emplace(counter->key), counter->count + m1, counter->error + m1, hash));
             }
         }
+
+        std::sort(counter_list.begin(), counter_list.end(), [](Counter * l, Counter * r) { return *l > *r; });
+
+        if (counter_list.size() > m_capacity)
+        {
+            for (size_t i = m_capacity; i < counter_list.size(); ++i)
+            {
+                arena.free(counter_list[i]->key);
+                delete counter_list[i];
+            }
+            counter_list.resize(m_capacity);
+        }
+
+        for (size_t i = 0; i < counter_list.size(); ++i)
+            counter_list[i]->slot = i;
+        rebuildCounterMap();
     }
 
     std::vector<Counter> topK(size_t k) const
@@ -336,7 +341,10 @@ private:
     void destroyElements()
     {
         for (auto counter : counter_list)
+        {
+            arena.free(counter->key);
             delete counter;
+        }
 
         counter_map.clear();
         counter_list.clear();
@@ -346,19 +354,40 @@ private:
     void destroyLastElement()
     {
         auto last_element = counter_list.back();
-        auto cell = counter_map.find(last_element->key, last_element->hash);
-        cell->setZero();
-        counter_map.reinsert(cell, last_element->hash);
-        counter_list.pop_back();
         arena.free(last_element->key);
         delete last_element;
+        counter_list.pop_back();
+
+        ++removed_keys;
+        if (removed_keys * 2 > counter_map.size())
+            rebuildCounterMap();
     }
 
-    HashMap<TKey, Counter *, Hash, Grower, Allocator> counter_map;
+    Counter * findCounter(const TKey & key, size_t hash)
+    {
+        auto it = counter_map.find(key, hash);
+        if (it == counter_map.end())
+            return nullptr;
+
+        return it->getSecond();
+    }
+
+    void rebuildCounterMap()
+    {
+        removed_keys = 0;
+        counter_map.clear();
+        for (auto counter : counter_list)
+            counter_map[counter->key] = counter;
+    }
+
+    using CounterMap = HashMap<TKey, Counter *, Hash, Grower, Allocator>;
+
+    CounterMap counter_map;
     std::vector<Counter *> counter_list;
     std::vector<UInt64> alpha_map;
     SpaceSavingArena<TKey> arena;
     size_t m_capacity;
+    size_t removed_keys = 0;
 };
 
 }

dbms/src/Common/Stopwatch.h

@@ -86,7 +86,7 @@ public:
 
         operator bool() const { return parent != nullptr; }
 
-        Lock(AtomicStopwatch * parent) : parent(parent) {}
+        Lock(AtomicStopwatch * parent_) : parent(parent_) {}
 
         Lock(Lock &&) = default;
 

dbms/src/Common/StringSearcher.h

@@ -75,8 +75,8 @@ private:
 #endif
 
 public:
-    StringSearcher(const char * const needle_, const size_t needle_size)
+    StringSearcher(const char * const needle_, const size_t needle_size_)
-        : needle{reinterpret_cast<const UInt8 *>(needle_)}, needle_size{needle_size}
+        : needle{reinterpret_cast<const UInt8 *>(needle_)}, needle_size{needle_size_}
     {
         if (0 == needle_size)
             return;
@@ -714,8 +714,8 @@ struct LibCASCIICaseSensitiveStringSearcher
 {
     const char * const needle;
 
-    LibCASCIICaseSensitiveStringSearcher(const char * const needle, const size_t /* needle_size */)
+    LibCASCIICaseSensitiveStringSearcher(const char * const needle_, const size_t /* needle_size */)
-        : needle(needle) {}
+        : needle(needle_) {}
 
     const UInt8 * search(const UInt8 * haystack, const UInt8 * const haystack_end) const
     {
@@ -735,8 +735,8 @@ struct LibCASCIICaseInsensitiveStringSearcher
 {
     const char * const needle;
 
-    LibCASCIICaseInsensitiveStringSearcher(const char * const needle, const size_t /* needle_size */)
+    LibCASCIICaseInsensitiveStringSearcher(const char * const needle_, const size_t /* needle_size */)
-        : needle(needle) {}
+        : needle(needle_) {}
 
     const UInt8 * search(const UInt8 * haystack, const UInt8 * const haystack_end) const
     {

dbms/src/Common/ThreadPool.cpp

@@ -22,14 +22,14 @@ namespace CurrentMetrics
 
 
 template <typename Thread>
-ThreadPoolImpl<Thread>::ThreadPoolImpl(size_t max_threads)
+ThreadPoolImpl<Thread>::ThreadPoolImpl(size_t max_threads_)
-    : ThreadPoolImpl(max_threads, max_threads, max_threads)
+    : ThreadPoolImpl(max_threads_, max_threads_, max_threads_)
 {
 }
 
 template <typename Thread>
-ThreadPoolImpl<Thread>::ThreadPoolImpl(size_t max_threads, size_t max_free_threads, size_t queue_size)
+ThreadPoolImpl<Thread>::ThreadPoolImpl(size_t max_threads_, size_t max_free_threads_, size_t queue_size_)
-    : max_threads(max_threads), max_free_threads(max_free_threads), queue_size(queue_size)
+    : max_threads(max_threads_), max_free_threads(max_free_threads_), queue_size(queue_size_)
 {
 }
 

dbms/src/Common/ThreadPool.h

@@ -31,10 +31,10 @@ public:
     using Job = std::function<void()>;
 
     /// Size is constant. Up to num_threads are created on demand and then run until shutdown.
-    explicit ThreadPoolImpl(size_t max_threads);
+    explicit ThreadPoolImpl(size_t max_threads_);
 
     /// queue_size - maximum number of running plus scheduled jobs. It can be greater than max_threads. Zero means unlimited.
-    ThreadPoolImpl(size_t max_threads, size_t max_free_threads, size_t queue_size);
+    ThreadPoolImpl(size_t max_threads_, size_t max_free_threads_, size_t queue_size_);
 
     /// Add new job. Locks until number of scheduled jobs is less than maximum or exception in one of threads was thrown.
     /// If an exception in some thread was thrown, method silently returns, and exception will be rethrown only on call to 'wait' function.
@@ -81,8 +81,8 @@ private:
         Job job;
         int priority;
 
-        JobWithPriority(Job job, int priority)
+        JobWithPriority(Job job_, int priority_)
-            : job(job), priority(priority) {}
+            : job(job_), priority(priority_) {}
 
         bool operator< (const JobWithPriority & rhs) const
         {

dbms/src/Common/Throttler.h

@@ -36,12 +36,12 @@ namespace ErrorCodes
 class Throttler
 {
 public:
-    Throttler(size_t max_speed_, const std::shared_ptr<Throttler> & parent = nullptr)
+    Throttler(size_t max_speed_, const std::shared_ptr<Throttler> & parent_ = nullptr)
-            : max_speed(max_speed_), limit_exceeded_exception_message(""), parent(parent) {}
+            : max_speed(max_speed_), limit_exceeded_exception_message(""), parent(parent_) {}
 
     Throttler(size_t max_speed_, size_t limit_, const char * limit_exceeded_exception_message_,
-              const std::shared_ptr<Throttler> & parent = nullptr)
+              const std::shared_ptr<Throttler> & parent_ = nullptr)
-        : max_speed(max_speed_), limit(limit_), limit_exceeded_exception_message(limit_exceeded_exception_message_), parent(parent) {}
+        : max_speed(max_speed_), limit(limit_), limit_exceeded_exception_message(limit_exceeded_exception_message_), parent(parent_) {}
 
     void add(const size_t amount)
     {

dbms/src/Common/TraceCollector.cpp

@@ -28,9 +28,9 @@ namespace ErrorCodes
     extern const int CANNOT_FCNTL;
 }
 
-TraceCollector::TraceCollector(std::shared_ptr<TraceLog> & trace_log)
+TraceCollector::TraceCollector(std::shared_ptr<TraceLog> & trace_log_)
     : log(&Poco::Logger::get("TraceCollector"))
-    , trace_log(trace_log)
+    , trace_log(trace_log_)
 {
     if (trace_log == nullptr)
         throw Exception("Invalid trace log pointer passed", ErrorCodes::NULL_POINTER_DEREFERENCE);

dbms/src/Common/TraceCollector.h

@@ -24,7 +24,7 @@ private:
     static void notifyToStop();
 
 public:
-    TraceCollector(std::shared_ptr<TraceLog> & trace_log);
+    TraceCollector(std::shared_ptr<TraceLog> & trace_log_);
 
     ~TraceCollector();
 };

dbms/src/Common/UInt128.h

@@ -28,7 +28,7 @@ struct UInt128
     UInt64 high;
 
     UInt128() = default;
-    explicit UInt128(const UInt64 low, const UInt64 high) : low(low), high(high) {}
+    explicit UInt128(const UInt64 low_, const UInt64 high_) : low(low_), high(high_) {}
     explicit UInt128(const UInt64 rhs) : low(rhs), high() {}
 
     auto tuple() const { return std::tie(high, low); }

dbms/src/Common/Volnitsky.h

@@ -331,11 +331,11 @@ public:
       * If you specify it small enough, the fallback algorithm will be used,
       *  since it is considered that it's useless to waste time initializing the hash table.
       */
-    VolnitskyBase(const char * const needle, const size_t needle_size, size_t haystack_size_hint = 0)
+    VolnitskyBase(const char * const needle_, const size_t needle_size_, size_t haystack_size_hint = 0)
-        : needle{reinterpret_cast<const UInt8 *>(needle)}
+        : needle{reinterpret_cast<const UInt8 *>(needle_)}
-        , needle_size{needle_size}
+        , needle_size{needle_size_}
         , fallback{VolnitskyTraits::isFallbackNeedle(needle_size, haystack_size_hint)}
-        , fallback_searcher{needle, needle_size}
+        , fallback_searcher{needle_, needle_size}
     {
         if (fallback)
             return;

dbms/src/Common/ZooKeeper/IKeeper.cpp

@@ -23,8 +23,8 @@ namespace ProfileEvents
 namespace Coordination
 {
 
-Exception::Exception(const std::string & msg, const int32_t code, int)
+Exception::Exception(const std::string & msg, const int32_t code_, int)
-    : DB::Exception(msg, DB::ErrorCodes::KEEPER_EXCEPTION), code(code)
+    : DB::Exception(msg, DB::ErrorCodes::KEEPER_EXCEPTION), code(code_)
 {
     if (Coordination::isUserError(code))
         ProfileEvents::increment(ProfileEvents::ZooKeeperUserExceptions);
@@ -34,18 +34,18 @@ Exception::Exception(const std::string & msg, const int32_t code, int)
         ProfileEvents::increment(ProfileEvents::ZooKeeperOtherExceptions);
 }
 
-Exception::Exception(const std::string & msg, const int32_t code)
+Exception::Exception(const std::string & msg, const int32_t code_)
-    : Exception(msg + " (" + errorMessage(code) + ")", code, 0)
+    : Exception(msg + " (" + errorMessage(code_) + ")", code_, 0)
 {
 }
 
-Exception::Exception(const int32_t code)
+Exception::Exception(const int32_t code_)
-    : Exception(errorMessage(code), code, 0)
+    : Exception(errorMessage(code_), code_, 0)
 {
 }
 
-Exception::Exception(const int32_t code, const std::string & path)
+Exception::Exception(const int32_t code_, const std::string & path)
-    : Exception(std::string{errorMessage(code)} + ", path: " + path, code, 0)
+    : Exception(std::string{errorMessage(code_)} + ", path: " + path, code_, 0)
 {
 }
 

dbms/src/Common/ZooKeeper/IKeeper.h

@@ -301,12 +301,12 @@ 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);
+    Exception(const std::string & msg, const int32_t code_, int);
 
 public:
-    explicit Exception(const int32_t code);
+    explicit Exception(const int32_t code_);
-    Exception(const std::string & msg, const int32_t code);
+    Exception(const std::string & msg, const int32_t code_);
-    Exception(const int32_t code, const std::string & path);
+    Exception(const int32_t code_, const std::string & path);
     Exception(const Exception & exc);
 
     const char * name() const throw() override { return "Coordination::Exception"; }

dbms/src/Common/ZooKeeper/TestKeeper.cpp

@@ -418,8 +418,8 @@ ResponsePtr TestKeeperCheckRequest::createResponse() const { return std::make_sh
 ResponsePtr TestKeeperMultiRequest::createResponse() const { return std::make_shared<MultiResponse>(); }
 
 
-TestKeeper::TestKeeper(const String & root_path_, Poco::Timespan operation_timeout)
+TestKeeper::TestKeeper(const String & root_path_, Poco::Timespan operation_timeout_)
-    : root_path(root_path_), operation_timeout(operation_timeout)
+    : root_path(root_path_), operation_timeout(operation_timeout_)
 {
     container.emplace("/", Node());
 

dbms/src/Common/ZooKeeper/TestKeeper.h

@@ -33,7 +33,7 @@ using TestKeeperRequestPtr = std::shared_ptr<TestKeeperRequest>;
 class TestKeeper : public IKeeper
 {
 public:
-    TestKeeper(const String & root_path, Poco::Timespan operation_timeout);
+    TestKeeper(const String & root_path_, Poco::Timespan operation_timeout_);
     ~TestKeeper() override;
 
     bool isExpired() const override { return expired; }

dbms/src/Common/ZooKeeper/ZooKeeper.cpp

@@ -106,10 +106,10 @@ void ZooKeeper::init(const std::string & implementation, const std::string & hos
         throw KeeperException("Zookeeper root doesn't exist. You should create root node " + chroot + " before start.", Coordination::ZNONODE);
 }
 
-ZooKeeper::ZooKeeper(const std::string & hosts, const std::string & identity, int32_t session_timeout_ms,
+ZooKeeper::ZooKeeper(const std::string & hosts_, const std::string & identity_, int32_t session_timeout_ms_,
-                     int32_t operation_timeout_ms, const std::string & chroot, const std::string & implementation)
+                     int32_t operation_timeout_ms_, const std::string & chroot_, const std::string & implementation)
 {
-    init(implementation, hosts, identity, session_timeout_ms, operation_timeout_ms, chroot);
+    init(implementation, hosts_, identity_, session_timeout_ms_, operation_timeout_ms_, chroot_);
 }
 
 struct ZooKeeperArgs
@@ -891,9 +891,9 @@ size_t KeeperMultiException::getFailedOpIndex(int32_t exception_code, const Coor
 }
 
 
-KeeperMultiException::KeeperMultiException(int32_t exception_code, const Coordination::Requests & requests, const Coordination::Responses & responses)
+KeeperMultiException::KeeperMultiException(int32_t exception_code, const Coordination::Requests & requests_, const Coordination::Responses & responses_)
         : KeeperException("Transaction failed", exception_code),
-          requests(requests), responses(responses), failed_op_index(getFailedOpIndex(exception_code, responses))
+          requests(requests_), responses(responses_), failed_op_index(getFailedOpIndex(exception_code, responses))
 {
     addMessage("Op #" + std::to_string(failed_op_index) + ", path: " + getPathForFirstFailedOp());
 }

dbms/src/Common/ZooKeeper/ZooKeeper.h

@@ -52,10 +52,10 @@ class ZooKeeper
 public:
     using Ptr = std::shared_ptr<ZooKeeper>;
 
-    ZooKeeper(const std::string & hosts, const std::string & identity = "",
+    ZooKeeper(const std::string & hosts_, const std::string & identity_ = "",
-              int32_t session_timeout_ms = DEFAULT_SESSION_TIMEOUT,
+              int32_t session_timeout_ms_ = DEFAULT_SESSION_TIMEOUT,
-              int32_t operation_timeout_ms = DEFAULT_OPERATION_TIMEOUT,
+              int32_t operation_timeout_ms_ = DEFAULT_OPERATION_TIMEOUT,
-              const std::string & chroot = "",
+              const std::string & chroot_ = "",
               const std::string & implementation = "zookeeper");
 
     /** Config of the form:

dbms/src/Common/ZooKeeper/ZooKeeperImpl.cpp

@@ -758,17 +758,17 @@ struct ZooKeeperMultiResponse final : MultiResponse, ZooKeeperResponse
         {
             ZooKeeper::OpNum op_num;
             bool done;
-            int32_t error;
+            int32_t error_;
 
             Coordination::read(op_num, in);
             Coordination::read(done, in);
-            Coordination::read(error, in);
+            Coordination::read(error_, in);
 
             if (!done)
                 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", ZMARSHALLINGERROR);
-            if (error != -1)
+            if (error_ != -1)
                 throw Exception("Unexpected error value received at the end of results for multi transaction", ZMARSHALLINGERROR);
         }
     }
@@ -821,12 +821,12 @@ ZooKeeper::ZooKeeper(
     const String & root_path_,
     const String & auth_scheme,
     const String & auth_data,
-    Poco::Timespan session_timeout,
+    Poco::Timespan session_timeout_,
     Poco::Timespan connection_timeout,
-    Poco::Timespan operation_timeout)
+    Poco::Timespan operation_timeout_)
     : root_path(root_path_),
-    session_timeout(session_timeout),
+    session_timeout(session_timeout_),
-    operation_timeout(std::min(operation_timeout, session_timeout))
+    operation_timeout(std::min(operation_timeout_, session_timeout_))
 {
     if (!root_path.empty())
     {

dbms/src/Common/ZooKeeper/ZooKeeperImpl.h

@@ -108,9 +108,9 @@ public:
         const String & root_path,
         const String & auth_scheme,
         const String & auth_data,
-        Poco::Timespan session_timeout,
+        Poco::Timespan session_timeout_,
         Poco::Timespan connection_timeout,
-        Poco::Timespan operation_timeout);
+        Poco::Timespan operation_timeout_);
 
     ~ZooKeeper() override;
 

dbms/src/Common/checkStackSize.cpp

@@ -0,0 +1,62 @@
+#include <Common/checkStackSize.h>
+#include <Common/Exception.h>
+#include <ext/scope_guard.h>
+
+#include <pthread.h>
+#include <cstdint>
+#include <sstream>
+
+
+namespace DB
+{
+    namespace ErrorCodes
+    {
+        extern const int CANNOT_PTHREAD_ATTR;
+        extern const int LOGICAL_ERROR;
+        extern const int TOO_DEEP_RECURSION;
+    }
+}
+
+
+static thread_local void * stack_address = nullptr;
+static thread_local size_t max_stack_size = 0;
+
+void checkStackSize()
+{
+    using namespace DB;
+
+    if (!stack_address)
+    {
+        pthread_attr_t attr;
+        if (0 != pthread_getattr_np(pthread_self(), &attr))
+            throwFromErrno("Cannot pthread_getattr_np", ErrorCodes::CANNOT_PTHREAD_ATTR);
+
+        SCOPE_EXIT({ pthread_attr_destroy(&attr); });
+
+        if (0 != pthread_attr_getstack(&attr, &stack_address, &max_stack_size))
+            throwFromErrno("Cannot pthread_getattr_np", ErrorCodes::CANNOT_PTHREAD_ATTR);
+    }
+
+    const void * frame_address = __builtin_frame_address(0);
+    uintptr_t int_frame_address = reinterpret_cast<uintptr_t>(frame_address);
+    uintptr_t int_stack_address = reinterpret_cast<uintptr_t>(stack_address);
+
+    /// We assume that stack grows towards lower addresses. And that it starts to grow from the end of a chunk of memory of max_stack_size.
+    if (int_frame_address > int_stack_address + max_stack_size)
+        throw Exception("Logical error: frame address is greater than stack begin address", ErrorCodes::LOGICAL_ERROR);
+
+    size_t stack_size = int_stack_address + max_stack_size - int_frame_address;
+
+    /// Just check if we have already eat more than a half of stack size. It's a bit overkill (a half of stack size is wasted).
+    /// It's safe to assume that overflow in multiplying by two cannot occur.
+    if (stack_size * 2 > max_stack_size)
+    {
+        std::stringstream message;
+        message << "Stack size too large"
+            << ". Stack address: " << stack_address
+            << ", frame address: " << frame_address
+            << ", stack size: " << stack_size
+            << ", maximum stack size: " << max_stack_size;
+        throw Exception(message.str(), ErrorCodes::TOO_DEEP_RECURSION);
+    }
+}

dbms/src/Common/checkStackSize.h

@@ -0,0 +1,7 @@
+#pragma once
+
+/** If the stack is large enough and is near its size, throw an exception.
+  * You can call this function in "heavy" functions that may be called recursively
+  *  to prevent possible stack overflows.
+  */
+void checkStackSize();

dbms/src/Common/getExecutablePath.cpp

@@ -0,0 +1,13 @@
+#include <Common/getExecutablePath.h>
+#include <filesystem>
+
+
+std::string getExecutablePath()
+{
+    std::error_code ec;
+    std::filesystem::path canonical_path = std::filesystem::canonical("/proc/self/exe", ec);
+
+    if (ec)
+        return {};
+    return canonical_path;
+}

dbms/src/Common/getExecutablePath.h

@@ -0,0 +1,11 @@
+#pragma once
+
+#include <string>
+
+/** Get path to the running executable if possible.
+  * It is possible when:
+  * - procfs exists;
+  * - there is a /proc/self/exe file;
+  * Otherwise return empty string.
+  */
+std::string getExecutablePath();

dbms/src/Common/hex.h

@@ -42,7 +42,7 @@ inline void writeHexByteLowercase(UInt8 byte, void * out)
 
 /// Produces hex representation of an unsigned int with leading zeros (for checksums)
 template <typename TUInt>
-inline void writeHexUIntImpl(TUInt uint, char * out, const char * const table)
+inline void writeHexUIntImpl(TUInt uint_, char * out, const char * const table)
 {
     union
     {
@@ -50,7 +50,7 @@ inline void writeHexUIntImpl(TUInt uint, char * out, const char * const table)
         UInt8 uint8[sizeof(TUInt)];
     };
 
-    value = uint;
+    value = uint_;
 
     /// Use little endian
     for (size_t i = 0; i < sizeof(TUInt); ++i)
@@ -58,30 +58,30 @@ inline void writeHexUIntImpl(TUInt uint, char * out, const char * const table)
 }
 
 template <typename TUInt>
-inline void writeHexUIntUppercase(TUInt uint, char * out)
+inline void writeHexUIntUppercase(TUInt uint_, char * out)
 {
-    writeHexUIntImpl(uint, out, hex_byte_to_char_uppercase_table);
+    writeHexUIntImpl(uint_, out, hex_byte_to_char_uppercase_table);
 }
 
 template <typename TUInt>
-inline void writeHexUIntLowercase(TUInt uint, char * out)
+inline void writeHexUIntLowercase(TUInt uint_, char * out)
 {
-    writeHexUIntImpl(uint, out, hex_byte_to_char_lowercase_table);
+    writeHexUIntImpl(uint_, out, hex_byte_to_char_lowercase_table);
 }
 
 template <typename TUInt>
-std::string getHexUIntUppercase(TUInt uint)
+std::string getHexUIntUppercase(TUInt uint_)
 {
     std::string res(sizeof(TUInt) * 2, '\0');
-    writeHexUIntUppercase(uint, res.data());
+    writeHexUIntUppercase(uint_, res.data());
     return res;
 }
 
 template <typename TUInt>
-std::string getHexUIntLowercase(TUInt uint)
+std::string getHexUIntLowercase(TUInt uint_)
 {
     std::string res(sizeof(TUInt) * 2, '\0');
-    writeHexUIntLowercase(uint, res.data());
+    writeHexUIntLowercase(uint_, res.data());
     return res;
 }
 

dbms/src/Common/tests/arena_with_free_lists.cpp

@@ -137,17 +137,17 @@ struct Dictionary
 
     enum class AttributeUnderlyingType
     {
-        UInt8,
+        utUInt8,
-        UInt16,
+        utUInt16,
-        UInt32,
+        utUInt32,
-        UInt64,
+        utUInt64,
-        Int8,
+        utInt8,
-        Int16,
+        utInt16,
-        Int32,
+        utInt32,
-        Int64,
+        utInt64,
-        Float32,
+        utFloat32,
-        Float64,
+        utFloat64,
-        String
+        utString
     };
 
     struct Attribute final
@@ -172,17 +172,17 @@ struct Dictionary
     {
         switch (attribute.type)
         {
-            case AttributeUnderlyingType::UInt8: std::get<ContainerPtrType<UInt8>>(attribute.arrays)[idx] = value.get<UInt64>(); break;
+            case AttributeUnderlyingType::utUInt8: std::get<ContainerPtrType<UInt8>>(attribute.arrays)[idx] = value.get<UInt64>(); break;
-            case AttributeUnderlyingType::UInt16: std::get<ContainerPtrType<UInt16>>(attribute.arrays)[idx] = value.get<UInt64>(); break;
+            case AttributeUnderlyingType::utUInt16: std::get<ContainerPtrType<UInt16>>(attribute.arrays)[idx] = value.get<UInt64>(); break;
-            case AttributeUnderlyingType::UInt32: std::get<ContainerPtrType<UInt32>>(attribute.arrays)[idx] = value.get<UInt64>(); break;
+            case AttributeUnderlyingType::utUInt32: std::get<ContainerPtrType<UInt32>>(attribute.arrays)[idx] = value.get<UInt64>(); break;
-            case AttributeUnderlyingType::UInt64: std::get<ContainerPtrType<UInt64>>(attribute.arrays)[idx] = value.get<UInt64>(); break;
+            case AttributeUnderlyingType::utUInt64: std::get<ContainerPtrType<UInt64>>(attribute.arrays)[idx] = value.get<UInt64>(); break;
-            case AttributeUnderlyingType::Int8: std::get<ContainerPtrType<Int8>>(attribute.arrays)[idx] = value.get<Int64>(); break;
+            case AttributeUnderlyingType::utInt8: std::get<ContainerPtrType<Int8>>(attribute.arrays)[idx] = value.get<Int64>(); break;
-            case AttributeUnderlyingType::Int16: std::get<ContainerPtrType<Int16>>(attribute.arrays)[idx] = value.get<Int64>(); break;
+            case AttributeUnderlyingType::utInt16: std::get<ContainerPtrType<Int16>>(attribute.arrays)[idx] = value.get<Int64>(); break;
-            case AttributeUnderlyingType::Int32: std::get<ContainerPtrType<Int32>>(attribute.arrays)[idx] = value.get<Int64>(); break;
+            case AttributeUnderlyingType::utInt32: std::get<ContainerPtrType<Int32>>(attribute.arrays)[idx] = value.get<Int64>(); break;
-            case AttributeUnderlyingType::Int64: std::get<ContainerPtrType<Int64>>(attribute.arrays)[idx] = value.get<Int64>(); break;
+            case AttributeUnderlyingType::utInt64: std::get<ContainerPtrType<Int64>>(attribute.arrays)[idx] = value.get<Int64>(); break;
-            case AttributeUnderlyingType::Float32: std::get<ContainerPtrType<Float32>>(attribute.arrays)[idx] = value.get<Float64>(); break;
+            case AttributeUnderlyingType::utFloat32: std::get<ContainerPtrType<Float32>>(attribute.arrays)[idx] = value.get<Float64>(); break;
-            case AttributeUnderlyingType::Float64: std::get<ContainerPtrType<Float64>>(attribute.arrays)[idx] = value.get<Float64>(); break;
+            case AttributeUnderlyingType::utFloat64: std::get<ContainerPtrType<Float64>>(attribute.arrays)[idx] = value.get<Float64>(); break;
-            case AttributeUnderlyingType::String:
+            case AttributeUnderlyingType::utString:
             {
                 const auto & string = value.get<String>();
                 auto & string_ref = std::get<ContainerPtrType<StringRef>>(attribute.arrays)[idx];
@@ -308,7 +308,7 @@ int main(int argc, char ** argv)
     constexpr size_t cache_size = 1024;
 
     Dictionary::Attribute attr;
-    attr.type = Dictionary::AttributeUnderlyingType::String;
+    attr.type = Dictionary::AttributeUnderlyingType::utString;
     std::get<Dictionary::ContainerPtrType<StringRef>>(attr.arrays).reset(new StringRef[cache_size]{});
 
     while (true)

dbms/src/Common/tests/cow_columns.cpp

@@ -28,7 +28,7 @@ private:
     friend class COWHelper<IColumn, ConcreteColumn>;
 
     int data;
-    ConcreteColumn(int data) : data(data) {}
+    ConcreteColumn(int data_) : data(data_) {}
     ConcreteColumn(const ConcreteColumn &) = default;
 
     MutableColumnPtr test() const override

dbms/src/Common/tests/cow_compositions.cpp

@@ -30,7 +30,7 @@ private:
     friend class COWHelper<IColumn, ConcreteColumn>;
 
     int data;
-    ConcreteColumn(int data) : data(data) {}
+    ConcreteColumn(int data_) : data(data_) {}
     ConcreteColumn(const ConcreteColumn &) = default;
 
 public:

dbms/src/Common/tests/mi_malloc_test.cpp

@@ -58,8 +58,8 @@ struct Allocation
 
     Allocation() {}
 
-    Allocation(size_t size)
+    Allocation(size_t size_)
-        : size(size)
+        : size(size_)
     {
         ptr = malloc(size);
         if (!ptr)

dbms/src/Compression/CompressionCodecMultiple.cpp

@@ -18,8 +18,8 @@ extern const int UNKNOWN_CODEC;
 extern const int CORRUPTED_DATA;
 }
 
-CompressionCodecMultiple::CompressionCodecMultiple(Codecs codecs)
+CompressionCodecMultiple::CompressionCodecMultiple(Codecs codecs_)
-    : codecs(codecs)
+    : codecs(codecs_)
 {
 }
 

dbms/src/Compression/CompressionCodecMultiple.h

@@ -9,7 +9,7 @@ class CompressionCodecMultiple final : public ICompressionCodec
 {
 public:
     CompressionCodecMultiple() = default;
-    explicit CompressionCodecMultiple(Codecs codecs);
+    explicit CompressionCodecMultiple(Codecs codecs_);
 
     UInt8 getMethodByte() const override;
 

dbms/src/Compression/LZ4_decompress_faster.cpp

@@ -537,7 +537,6 @@ void decompress(
     if (source_size == 0 || dest_size == 0)
         return;
 
-
     /// Don't run timer if the block is too small.
     if (dest_size >= 32768)
     {

dbms/src/Compression/LZ4_decompress_faster.h

@@ -123,7 +123,7 @@ struct PerformanceStatistics
     }
 
     PerformanceStatistics() {}
-    PerformanceStatistics(ssize_t choose_method) : choose_method(choose_method) {}
+    PerformanceStatistics(ssize_t choose_method_) : choose_method(choose_method_) {}
 };
 
 

dbms/src/Compression/tests/gtest_compressionCodec.cpp

@@ -334,10 +334,10 @@ auto SequentialGenerator = [](auto stride = 1)
 template <typename T>
 struct MonotonicGenerator
 {
-    MonotonicGenerator(T stride = 1, size_t max_step = 10)
+    MonotonicGenerator(T stride_ = 1, size_t max_step_ = 10)
         : prev_value(0),
-          stride(stride),
+          stride(stride_),
-          max_step(max_step)
+          max_step(max_step_)
     {}
 
     template <typename U>
@@ -369,9 +369,9 @@ auto MinMaxGenerator = [](auto i)
 template <typename T>
 struct RandomGenerator
 {
-    RandomGenerator(T seed = 0, T value_cap = std::numeric_limits<T>::max())
+    RandomGenerator(T seed = 0, T value_cap_ = std::numeric_limits<T>::max())
         : e(seed),
-          value_cap(value_cap)
+          value_cap(value_cap_)
     {
     }
 

dbms/src/Core/BackgroundSchedulePool.cpp

@@ -23,7 +23,7 @@ namespace DB
 class TaskNotification final : public Poco::Notification
 {
 public:
-    explicit TaskNotification(const BackgroundSchedulePoolTaskInfoPtr & task) : task(task) {}
+    explicit TaskNotification(const BackgroundSchedulePoolTaskInfoPtr & task_) : task(task_) {}
     void execute() { task->execute(); }
 
 private:
@@ -155,8 +155,8 @@ Coordination::WatchCallback BackgroundSchedulePoolTaskInfo::getWatchCallback()
 }
 
 
-BackgroundSchedulePool::BackgroundSchedulePool(size_t size)
+BackgroundSchedulePool::BackgroundSchedulePool(size_t size_)
-    : size(size)
+    : size(size_)
 {
     LOG_INFO(&Logger::get("BackgroundSchedulePool"), "Create BackgroundSchedulePool with " << size << " threads");
 

dbms/src/Core/BackgroundSchedulePool.h

@@ -49,7 +49,7 @@ public:
 
     size_t getNumberOfThreads() const { return size; }
 
-    BackgroundSchedulePool(size_t size);
+    BackgroundSchedulePool(size_t size_);
     ~BackgroundSchedulePool();
 
 private:

dbms/src/Core/ExternalResultDescription.cpp

@@ -33,33 +33,33 @@ void ExternalResultDescription::init(const Block & sample_block_)
         const IDataType * type = type_not_nullable.get();
 
         if (typeid_cast<const DataTypeUInt8 *>(type))
-            types.emplace_back(ValueType::UInt8, is_nullable);
+            types.emplace_back(ValueType::vtUInt8, is_nullable);
         else if (typeid_cast<const DataTypeUInt16 *>(type))
-            types.emplace_back(ValueType::UInt16, is_nullable);
+            types.emplace_back(ValueType::vtUInt16, is_nullable);
         else if (typeid_cast<const DataTypeUInt32 *>(type))
-            types.emplace_back(ValueType::UInt32, is_nullable);
+            types.emplace_back(ValueType::vtUInt32, is_nullable);
         else if (typeid_cast<const DataTypeUInt64 *>(type))
-            types.emplace_back(ValueType::UInt64, is_nullable);
+            types.emplace_back(ValueType::vtUInt64, is_nullable);
         else if (typeid_cast<const DataTypeInt8 *>(type))
-            types.emplace_back(ValueType::Int8, is_nullable);
+            types.emplace_back(ValueType::vtInt8, is_nullable);
         else if (typeid_cast<const DataTypeInt16 *>(type))
-            types.emplace_back(ValueType::Int16, is_nullable);
+            types.emplace_back(ValueType::vtInt16, is_nullable);
         else if (typeid_cast<const DataTypeInt32 *>(type))
-            types.emplace_back(ValueType::Int32, is_nullable);
+            types.emplace_back(ValueType::vtInt32, is_nullable);
         else if (typeid_cast<const DataTypeInt64 *>(type))
-            types.emplace_back(ValueType::Int64, is_nullable);
+            types.emplace_back(ValueType::vtInt64, is_nullable);
         else if (typeid_cast<const DataTypeFloat32 *>(type))
-            types.emplace_back(ValueType::Float32, is_nullable);
+            types.emplace_back(ValueType::vtFloat32, is_nullable);
         else if (typeid_cast<const DataTypeFloat64 *>(type))
-            types.emplace_back(ValueType::Float64, is_nullable);
+            types.emplace_back(ValueType::vtFloat64, is_nullable);
         else if (typeid_cast<const DataTypeString *>(type))
-            types.emplace_back(ValueType::String, is_nullable);
+            types.emplace_back(ValueType::vtString, is_nullable);
         else if (typeid_cast<const DataTypeDate *>(type))
-            types.emplace_back(ValueType::Date, is_nullable);
+            types.emplace_back(ValueType::vtDate, is_nullable);
         else if (typeid_cast<const DataTypeDateTime *>(type))
-            types.emplace_back(ValueType::DateTime, is_nullable);
+            types.emplace_back(ValueType::vtDateTime, is_nullable);
         else if (typeid_cast<const DataTypeUUID *>(type))
-            types.emplace_back(ValueType::UUID, is_nullable);
+            types.emplace_back(ValueType::vtUUID, is_nullable);
         else
             throw Exception{"Unsupported type " + type->getName(), ErrorCodes::UNKNOWN_TYPE};
     }

dbms/src/Core/ExternalResultDescription.h

@@ -12,20 +12,20 @@ struct ExternalResultDescription
 {
     enum struct ValueType
     {
-        UInt8,
+        vtUInt8,
-        UInt16,
+        vtUInt16,
-        UInt32,
+        vtUInt32,
-        UInt64,
+        vtUInt64,
-        Int8,
+        vtInt8,
-        Int16,
+        vtInt16,
-        Int32,
+        vtInt32,
-        Int64,
+        vtInt64,
-        Float32,
+        vtFloat32,
-        Float64,
+        vtFloat64,
-        String,
+        vtString,
-        Date,
+        vtDate,
-        DateTime,
+        vtDateTime,
-        UUID,
+        vtUUID,
     };
 
     Block sample_block;

dbms/src/Core/MySQLProtocol.h

@@ -137,10 +137,10 @@ public:
 class PacketPayloadReadBuffer : public ReadBuffer
 {
 public:
-    PacketPayloadReadBuffer(ReadBuffer & in, uint8_t & sequence_id)
+    PacketPayloadReadBuffer(ReadBuffer & in_, uint8_t & sequence_id_)
-        : ReadBuffer(in.position(), 0)  // not in.buffer().begin(), because working buffer may include previous packet
+        : ReadBuffer(in_.position(), 0)  // not in.buffer().begin(), because working buffer may include previous packet
-        , in(in)
+        , in(in_)
-        , sequence_id(sequence_id)
+        , sequence_id(sequence_id_)
     {
     }
 
@@ -245,8 +245,8 @@ public:
 class PacketPayloadWriteBuffer : public WriteBuffer
 {
 public:
-    PacketPayloadWriteBuffer(WriteBuffer & out, size_t payload_length, uint8_t & sequence_id)
+    PacketPayloadWriteBuffer(WriteBuffer & out_, size_t payload_length_, uint8_t & sequence_id_)
-        : WriteBuffer(out.position(), 0), out(out), sequence_id(sequence_id), total_left(payload_length)
+        : WriteBuffer(out_.position(), 0), out(out_), sequence_id(sequence_id_), total_left(payload_length_)
     {
         startNewPacket();
         setWorkingBuffer();
@@ -347,18 +347,18 @@ public:
     size_t max_packet_size = MAX_PACKET_LENGTH;
 
     /// For reading and writing.
-    PacketSender(ReadBuffer & in, WriteBuffer & out, uint8_t & sequence_id)
+    PacketSender(ReadBuffer & in_, WriteBuffer & out_, uint8_t & sequence_id_)
-        : sequence_id(sequence_id)
+        : sequence_id(sequence_id_)
-        , in(&in)
+        , in(&in_)
-        , out(&out)
+        , out(&out_)
     {
     }
 
     /// For writing.
-    PacketSender(WriteBuffer & out, uint8_t & sequence_id)
+    PacketSender(WriteBuffer & out_, uint8_t & sequence_id_)
-        : sequence_id(sequence_id)
+        : sequence_id(sequence_id_)
         , in(nullptr)
-        , out(&out)
+        , out(&out_)
     {
     }
 
@@ -421,15 +421,15 @@ class Handshake : public WritePacket
     String auth_plugin_name;
     String auth_plugin_data;
 public:
-    explicit Handshake(uint32_t capability_flags, uint32_t connection_id, String server_version, String auth_plugin_name, String auth_plugin_data)
+    explicit Handshake(uint32_t capability_flags_, uint32_t connection_id_, String server_version_, String auth_plugin_name_, String auth_plugin_data_)
         : protocol_version(0xa)
-        , server_version(std::move(server_version))
+        , server_version(std::move(server_version_))
-        , connection_id(connection_id)
+        , connection_id(connection_id_)
-        , capability_flags(capability_flags)
+        , capability_flags(capability_flags_)
         , character_set(CharacterSet::utf8_general_ci)
         , status_flags(0)
-        , auth_plugin_name(std::move(auth_plugin_name))
+        , auth_plugin_name(std::move(auth_plugin_name_))
-        , auth_plugin_data(std::move(auth_plugin_data))
+        , auth_plugin_data(std::move(auth_plugin_data_))
     {
     }
 
@@ -532,8 +532,8 @@ class AuthSwitchRequest : public WritePacket
     String plugin_name;
     String auth_plugin_data;
 public:
-    AuthSwitchRequest(String plugin_name, String auth_plugin_data)
+    AuthSwitchRequest(String plugin_name_, String auth_plugin_data_)
-        : plugin_name(std::move(plugin_name)), auth_plugin_data(std::move(auth_plugin_data))
+        : plugin_name(std::move(plugin_name_)), auth_plugin_data(std::move(auth_plugin_data_))
     {
     }
 
@@ -566,7 +566,7 @@ class AuthMoreData : public WritePacket
 {
     String data;
 public:
-    explicit AuthMoreData(String data): data(std::move(data)) {}
+    explicit AuthMoreData(String data_): data(std::move(data_)) {}
 
 protected:
     size_t getPayloadSize() const override
@@ -592,20 +592,20 @@ class OK_Packet : public WritePacket
     String session_state_changes;
     String info;
 public:
-    OK_Packet(uint8_t header,
+    OK_Packet(uint8_t header_,
-        uint32_t capabilities,
+        uint32_t capabilities_,
-        uint64_t affected_rows,
+        uint64_t affected_rows_,
-        uint32_t status_flags,
+        uint32_t status_flags_,
-        int16_t warnings,
+        int16_t warnings_,
-        String session_state_changes = "",
+        String session_state_changes_ = "",
-        String info = "")
+        String info_ = "")
-        : header(header)
+        : header(header_)
-        , capabilities(capabilities)
+        , capabilities(capabilities_)
-        , affected_rows(affected_rows)
+        , affected_rows(affected_rows_)
-        , warnings(warnings)
+        , warnings(warnings_)
-        , status_flags(status_flags)
+        , status_flags(status_flags_)
-        , session_state_changes(std::move(session_state_changes))
+        , session_state_changes(std::move(session_state_changes_))
-        , info(std::move(info))
+        , info(std::move(info_))
     {
     }
 
@@ -671,7 +671,7 @@ class EOF_Packet : public WritePacket
     int warnings;
     int status_flags;
 public:
-    EOF_Packet(int warnings, int status_flags) : warnings(warnings), status_flags(status_flags)
+    EOF_Packet(int warnings_, int status_flags_) : warnings(warnings_), status_flags(status_flags_)
     {}
 
 protected:
@@ -694,8 +694,8 @@ class ERR_Packet : public WritePacket
     String sql_state;
     String error_message;
 public:
-    ERR_Packet(int error_code, String sql_state, String error_message)
+    ERR_Packet(int error_code_, String sql_state_, String error_message_)
-        : error_code(error_code), sql_state(std::move(sql_state)), error_message(std::move(error_message))
+        : error_code(error_code_), sql_state(std::move(sql_state_)), error_message(std::move(error_message_))
     {
     }
 
@@ -730,32 +730,32 @@ class ColumnDefinition : public WritePacket
     uint8_t decimals = 0x00;
 public:
     ColumnDefinition(
-        String schema,
+        String schema_,
-        String table,
+        String table_,
-        String org_table,
+        String org_table_,
-        String name,
+        String name_,
-        String org_name,
+        String org_name_,
-        uint16_t character_set,
+        uint16_t character_set_,
-        uint32_t column_length,
+        uint32_t column_length_,
-        ColumnType column_type,
+        ColumnType column_type_,
-        uint16_t flags,
+        uint16_t flags_,
-        uint8_t decimals)
+        uint8_t decimals_)
 
-        : schema(std::move(schema)), table(std::move(table)), org_table(std::move(org_table)), name(std::move(name)),
+        : schema(std::move(schema_)), table(std::move(table_)), org_table(std::move(org_table_)), name(std::move(name_)),
-          org_name(std::move(org_name)), character_set(character_set), column_length(column_length), column_type(column_type), flags(flags),
+          org_name(std::move(org_name_)), character_set(character_set_), column_length(column_length_), column_type(column_type_), flags(flags_),
-          decimals(decimals)
+          decimals(decimals_)
     {
     }
 
     /// Should be used when column metadata (original name, table, original table, database) is unknown.
     ColumnDefinition(
-        String name,
+        String name_,
-        uint16_t character_set,
+        uint16_t character_set_,
-        uint32_t column_length,
+        uint32_t column_length_,
-        ColumnType column_type,
+        ColumnType column_type_,
-        uint16_t flags,
+        uint16_t flags_,
-        uint8_t decimals)
+        uint8_t decimals_)
-        : ColumnDefinition("", "", "", std::move(name), "", character_set, column_length, column_type, flags, decimals)
+        : ColumnDefinition("", "", "", std::move(name_), "", character_set_, column_length_, column_type_, flags_, decimals_)
     {
     }
 
@@ -801,7 +801,7 @@ class LengthEncodedNumber : public WritePacket
 {
     uint64_t value;
 public:
-    explicit LengthEncodedNumber(uint64_t value): value(value)
+    explicit LengthEncodedNumber(uint64_t value_): value(value_)
     {
     }
 

dbms/src/Core/NamesAndTypes.cpp

@@ -26,16 +26,20 @@ void NamesAndTypesList::readText(ReadBuffer & buf)
     size_t count;
     DB::readText(count, buf);
     assertString(" columns:\n", buf);
-    resize(count);
+
-    for (NameAndTypePair & it : *this)
+    String column_name;
-    {
-        readBackQuotedStringWithSQLStyle(it.name, buf);
-        assertChar(' ', buf);
     String type_name;
+    for (size_t i = 0; i < count; ++i)
+    {
+        readBackQuotedStringWithSQLStyle(column_name, buf);
+        assertChar(' ', buf);
         readString(type_name, buf);
-        it.type = data_type_factory.get(type_name);
         assertChar('\n', buf);
+
+        emplace_back(column_name, data_type_factory.get(type_name));
     }
+
+    assertEOF(buf);
 }
 
 void NamesAndTypesList::writeText(WriteBuffer & buf) const

dbms/src/Core/Types.h

@@ -12,6 +12,41 @@ namespace DB
 
 struct Null {};
 
+enum class TypeIndex
+{
+    Nothing = 0,
+    UInt8,
+    UInt16,
+    UInt32,
+    UInt64,
+    UInt128,
+    Int8,
+    Int16,
+    Int32,
+    Int64,
+    Int128,
+    Float32,
+    Float64,
+    Date,
+    DateTime,
+    String,
+    FixedString,
+    Enum8,
+    Enum16,
+    Decimal32,
+    Decimal64,
+    Decimal128,
+    UUID,
+    Array,
+    Tuple,
+    Set,
+    Interval,
+    Nullable,
+    Function,
+    AggregateFunction,
+    LowCardinality,
+};
+
 using UInt8 = uint8_t;
 using UInt16 = uint16_t;
 using UInt32 = uint32_t;
@@ -57,41 +92,6 @@ template <> struct TypeName<Float32> { static const char * get() { return "Float
 template <> struct TypeName<Float64> { static const char * get() { return "Float64"; } };
 template <> struct TypeName<String>  { static const char * get() { return "String";  } };
 
-enum class TypeIndex
-{
-    Nothing = 0,
-    UInt8,
-    UInt16,
-    UInt32,
-    UInt64,
-    UInt128,
-    Int8,
-    Int16,
-    Int32,
-    Int64,
-    Int128,
-    Float32,
-    Float64,
-    Date,
-    DateTime,
-    String,
-    FixedString,
-    Enum8,
-    Enum16,
-    Decimal32,
-    Decimal64,
-    Decimal128,
-    UUID,
-    Array,
-    Tuple,
-    Set,
-    Interval,
-    Nullable,
-    Function,
-    AggregateFunction,
-    LowCardinality,
-};
-
 template <typename T> struct TypeId;
 template <> struct TypeId<UInt8>    { static constexpr const TypeIndex value = TypeIndex::UInt8;  };
 template <> struct TypeId<UInt16>   { static constexpr const TypeIndex value = TypeIndex::UInt16;  };

dbms/src/DataStreams/CollapsingFinalBlockInputStream.h

@@ -45,9 +45,9 @@ private:
         MergingBlock(const Block & block_,
                      size_t stream_index_,
                      const SortDescription & desc,
-                     const String & sign_column_name,
+                     const String & sign_column_name_,
-                     BlockPlainPtrs * output_blocks)
+                     BlockPlainPtrs * output_blocks_)
-            : block(block_), stream_index(stream_index_), output_blocks(output_blocks)
+            : block(block_), stream_index(stream_index_), output_blocks(output_blocks_)
         {
             sort_columns.resize(desc.size());
             for (size_t i = 0; i < desc.size(); ++i)
@@ -59,7 +59,7 @@ private:
                 sort_columns[i] = block.safeGetByPosition(column_number).column.get();
             }
 
-            const IColumn * sign_icolumn = block.getByName(sign_column_name).column.get();
+            const IColumn * sign_icolumn = block.getByName(sign_column_name_).column.get();
 
             sign_column = typeid_cast<const ColumnInt8 *>(sign_icolumn);
 

dbms/src/DataStreams/DistinctBlockInputStream.cpp

@@ -8,10 +8,10 @@ namespace ErrorCodes
     extern const int SET_SIZE_LIMIT_EXCEEDED;
 }
 
-DistinctBlockInputStream::DistinctBlockInputStream(const BlockInputStreamPtr & input, const SizeLimits & set_size_limits, UInt64 limit_hint_, const Names & columns)
+DistinctBlockInputStream::DistinctBlockInputStream(const BlockInputStreamPtr & input, const SizeLimits & set_size_limits_, UInt64 limit_hint_, const Names & columns_)
-    : columns_names(columns)
+    : columns_names(columns_)
     , limit_hint(limit_hint_)
-    , set_size_limits(set_size_limits)
+    , set_size_limits(set_size_limits_)
 {
     children.push_back(input);
 }

dbms/src/DataStreams/DistinctBlockInputStream.h

@@ -17,7 +17,7 @@ class DistinctBlockInputStream : public IBlockInputStream
 {
 public:
     /// Empty columns_ means all collumns.
-    DistinctBlockInputStream(const BlockInputStreamPtr & input, const SizeLimits & set_size_limits, UInt64 limit_hint_, const Names & columns);
+    DistinctBlockInputStream(const BlockInputStreamPtr & input, const SizeLimits & set_size_limits_, UInt64 limit_hint_, const Names & columns_);
 
     String getName() const override { return "Distinct"; }