merge master

.github/PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1 @@
+I hereby agree to the terms of the CLA available at: https://yandex.ru/legal/cla/?lang=en

.gitmodules

@@ -31,3 +31,6 @@
 [submodule "contrib/re2"]
 	path = contrib/re2
 	url = https://github.com/google/re2.git
+[submodule "contrib/ssl"]
+	path = contrib/ssl
+	url = https://github.com/ClickHouse-Extras/ssl.git

.travis.yml

@@ -36,7 +36,7 @@ matrix:
           sources:
             - ubuntu-toolchain-r-test
             - llvm-toolchain-trusty-5.0
-          packages: [ g++-7, clang-5.0, libicu-dev, libreadline-dev, libmysqlclient-dev, unixodbc-dev, libltdl-dev, libssl-dev, libboost-dev, zlib1g-dev, libdouble-conversion-dev, libzookeeper-mt-dev, libsparsehash-dev, librdkafka-dev, libcapnp-dev, libsparsehash-dev, libgoogle-perftools-dev, bash, expect, python, python-lxml, python-termcolor, curl, perl, sudo ]
+          packages: [ g++-7, clang-5.0, lld-5.0, libicu-dev, libreadline-dev, libmysqlclient-dev, unixodbc-dev, libltdl-dev, libssl-dev, libboost-dev, zlib1g-dev, libdouble-conversion-dev, libzookeeper-mt-dev, libsparsehash-dev, librdkafka-dev, libcapnp-dev, libsparsehash-dev, libgoogle-perftools-dev, bash, expect, python, python-lxml, python-termcolor, curl, perl, sudo ]
 
       env:
         - MATRIX_EVAL="export CC=clang-5.0 && export CXX=clang++-5.0"
@@ -118,7 +118,7 @@ matrix:
 #          packages: [ pbuilder, fakeroot, debhelper ]
 #
 #      env:
-#        - MATRIX_EVAL="export DEB_CC=clang-6.0 && export DEB_CXX=clang++-6.0 && export DIST=bionic && export EXTRAPACKAGES=clang-6.0"
+#        - MATRIX_EVAL="export DEB_CC=clang-6.0 && export DEB_CXX=clang++-6.0 && export DIST=bionic && export EXTRAPACKAGES='clang-6.0 lld-6.0'"
 #
 #      script:
 #        - utils/travis/pbuilder.sh

CMakeLists.txt

@@ -35,32 +35,16 @@ message (STATUS "CMAKE_BUILD_TYPE: " ${CMAKE_BUILD_TYPE} )
 # TSan is not supported due to false positive errors in libstdc++ and necessity to rebuild libstdc++ with TSan
 set (CMAKE_CONFIGURATION_TYPES "RelWithDebInfo;Debug;Release;MinSizeRel;ASan;UBSan" CACHE STRING "" FORCE)
 
-if (CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64.*|AARCH64.*)")
+include (cmake/arch.cmake)
-    set (ARCH_AARCH64 1)
+
-endif ()
+if (NOT MSVC)
-if (ARCH_AARCH64 OR CMAKE_SYSTEM_PROCESSOR MATCHES "arm")
+    set (COMMON_WARNING_FLAGS "${COMMON_WARNING_FLAGS} -Wall")    # -Werror is also added inside directories with our own code.
-    set (ARCH_ARM 1)
-endif ()
-if (CMAKE_LIBRARY_ARCHITECTURE MATCHES "i386")
-    set (ARCH_I386 1)
-endif ()
-if ( ( ARCH_ARM AND NOT ARCH_AARCH64 ) OR ARCH_I386)
-    set (ARCH_32 1)
-    message (WARNING "Support for 32bit platforms is highly experimental")
-endif ()
-if (CMAKE_SYSTEM MATCHES "Linux")
-    set (ARCH_LINUX 1)
-endif ()
-if (CMAKE_SYSTEM MATCHES "FreeBSD")
-    set (ARCH_FREEBSD 1)
 endif ()
 
-if (ARCH_FREEBSD)
+if (COMPILER_GCC OR COMPILER_CLANG)
-    set (PLATFORM_EXTRA_CXX_FLAG "-DCLOCK_MONOTONIC_COARSE=CLOCK_MONOTONIC_FAST")
+    set (CXX_WARNING_FLAGS "${CXX_WARNING_FLAGS} -Wnon-virtual-dtor")
 endif ()
 
-set (COMMON_WARNING_FLAGS "${COMMON_WARNING_FLAGS} -Wall")    # -Werror is also added inside directories with our own code.
-set (CXX_WARNING_FLAGS "${CXX_WARNING_FLAGS} -Wnon-virtual-dtor")
 if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
     # clang: warning: argument unused during compilation: '-stdlib=libc++'
     # clang: warning: argument unused during compilation: '-specs=/usr/share/dpkg/no-pie-compile.specs' [-Wunused-command-line-argument]
@@ -72,7 +56,7 @@ if (ARCH_LINUX)
 endif ()
 
 option (TEST_COVERAGE "Enables flags for test coverage" OFF)
-option (ENABLE_TESTS "Enables tests" ON)
+option (ENABLE_TESTS "Enables tests" ${NOT_MSVC})
 
 option (USE_STATIC_LIBRARIES "Set to FALSE to use shared libraries" ON)
 option (MAKE_STATIC_LIBRARIES "Set to FALSE to make shared libraries" ${USE_STATIC_LIBRARIES})
@@ -111,8 +95,10 @@ endif ()
 
 set (COMPILER_FLAGS                      "${COMPILER_FLAGS} ${CXX11_ABI_FLAGS}")
 
-find_program (LLD_PATH NAMES lld)
+string(REGEX MATCH "-?[0-9]+(.[0-9]+)?$" COMPILER_POSTFIX ${CMAKE_CXX_COMPILER})
-find_program (GOLD_PATH NAMES gold)
+
+find_program (LLD_PATH NAMES "lld${COMPILER_POSTFIX}" "lld")
+find_program (GOLD_PATH NAMES "gold")
 
 if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang" AND LLD_PATH AND NOT LINKER_NAME)
     set (LINKER_NAME "lld")
@@ -121,7 +107,7 @@ elseif (GOLD_PATH)
 endif ()
 
 if (LINKER_NAME)
-    message(STATUS "Using linker: ${LINKER_NAME}")
+    message(STATUS "Using linker: ${LINKER_NAME} (selected from: LLD_PATH=${LLD_PATH}; GOLD_PATH=${GOLD_PATH}; COMPILER_POSTFIX=${COMPILER_POSTFIX})")
     set (CMAKE_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} -fuse-ld=${LINKER_NAME}")
 endif ()
 
@@ -196,29 +182,7 @@ if (NOT MAKE_STATIC_LIBRARIES)
     set(CMAKE_POSITION_INDEPENDENT_CODE ON)
 endif ()
 
-set (SAN_FLAGS "${SAN_FLAGS} -g -fno-omit-frame-pointer")
+include (cmake/sanitize.cmake)
-if (SAN_DEBUG)
-    set (SAN_FLAGS "${SAN_FLAGS} -O0")
-else ()
-    set (SAN_FLAGS "${SAN_FLAGS} -O3")
-endif ()
-
-set (CMAKE_CXX_FLAGS_ASAN                "${CMAKE_CXX_FLAGS_ASAN}  ${SAN_FLAGS} -fsanitize=address")
-set (CMAKE_C_FLAGS_ASAN                  "${CMAKE_C_FLAGS_ASAN}    ${SAN_FLAGS} -fsanitize=address")
-set (CMAKE_CXX_FLAGS_UBSAN               "${CMAKE_CXX_FLAGS_UBSAN} ${SAN_FLAGS} -fsanitize=undefined")
-set (CMAKE_C_FLAGS_UBSAN                 "${CMAKE_C_FLAGS_UBSAN}   ${SAN_FLAGS} -fsanitize=undefined")
-set (CMAKE_CXX_FLAGS_MSAN                "${CMAKE_CXX_FLAGS_MSAN}  ${SAN_FLAGS} -fsanitize=memory")
-set (CMAKE_C_FLAGS_MSAN                  "${CMAKE_C_FLAGS_MSAN}    ${SAN_FLAGS} -fsanitize=memory")
-set (CMAKE_CXX_FLAGS_TSAN                "${CMAKE_CXX_FLAGS_TSAN}  ${SAN_FLAGS} -fsanitize=thread")
-set (CMAKE_C_FLAGS_TSAN                  "${CMAKE_C_FLAGS_TSAN}    ${SAN_FLAGS} -fsanitize=thread")
-
-# clang use static linking by default
-if (MAKE_STATIC_LIBRARIES AND CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
-    set (CMAKE_EXE_LINKER_FLAGS_ASAN     "${CMAKE_EXE_LINKER_FLAGS_ASAN} -static-libasan")
-    set (CMAKE_EXE_LINKER_FLAGS_UBSAN    "${CMAKE_EXE_LINKER_FLAGS_UBSAN} -static-libubsan")
-    set (CMAKE_EXE_LINKER_FLAGS_MSAN     "${CMAKE_EXE_LINKER_FLAGS_MSAN} -static-libmsan")
-    set (CMAKE_EXE_LINKER_FLAGS_TSAN     "${CMAKE_EXE_LINKER_FLAGS_TSAN} -static-libtsan")
-endif ()
 
 # Using "include-what-you-use" tool.
 option (USE_INCLUDE_WHAT_YOU_USE "Use 'include-what-you-use' tool" OFF)
@@ -264,7 +228,7 @@ message (STATUS "Building for: ${CMAKE_SYSTEM} ${CMAKE_SYSTEM_PROCESSOR} ${CMAKE
 
 include(GNUInstallDirs)
 
-include (cmake/find_openssl.cmake)
+include (cmake/find_ssl.cmake)
 if (NOT OPENSSL_FOUND)
     message (FATAL_ERROR "Need openssl for build. debian tip: sudo apt install libssl-dev")
 endif ()
@@ -307,13 +271,7 @@ include (libs/libcommon/cmake/find_cctz.cmake)
 include (libs/libmysqlxx/cmake/find_mysqlclient.cmake)
 include (libs/libdaemon/cmake/find_unwind.cmake)
 
-
+include (cmake/print_flags.cmake)
-set (FULL_C_FLAGS "${CMAKE_C_FLAGS} ${CMAKE_C_FLAGS_${CMAKE_BUILD_TYPE_UC}}")
-set (FULL_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE_UC}}")
-set (FULL_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${CMAKE_EXE_LINKER_FLAGS_${CMAKE_BUILD_TYPE_UC}}")
-message (STATUS "C_FLAGS      = ${FULL_C_FLAGS}")
-message (STATUS "CXX_FLAGS    = ${FULL_CXX_FLAGS}")
-message (STATUS "LINKER_FLAGS = ${FULL_EXE_LINKER_FLAGS}")
 
 # Directory for Yandex specific files
 set (CLICKHOUSE_PRIVATE_DIR ${ClickHouse_SOURCE_DIR}/private/)

cmake/arch.cmake

@@ -0,0 +1,29 @@
+if (CMAKE_SYSTEM_PROCESSOR MATCHES "^(aarch64.*|AARCH64.*)")
+    set (ARCH_AARCH64 1)
+endif ()
+if (ARCH_AARCH64 OR CMAKE_SYSTEM_PROCESSOR MATCHES "arm")
+    set (ARCH_ARM 1)
+endif ()
+if (CMAKE_LIBRARY_ARCHITECTURE MATCHES "i386")
+    set (ARCH_I386 1)
+endif ()
+if ( ( ARCH_ARM AND NOT ARCH_AARCH64 ) OR ARCH_I386)
+    set (ARCH_32 1)
+    message (WARNING "Support for 32bit platforms is highly experimental")
+endif ()
+if (CMAKE_SYSTEM MATCHES "Linux")
+    set (ARCH_LINUX 1)
+endif ()
+if (CMAKE_SYSTEM MATCHES "FreeBSD")
+    set (ARCH_FREEBSD 1)
+endif ()
+
+if (NOT MSVC)
+    set (NOT_MSVC 1)
+endif ()
+
+if (CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+    set (COMPILER_GCC 1)
+elseif (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
+    set (COMPILER_CLANG 1)
+endif ()

cmake/find_capnp.cmake

@@ -1,4 +1,4 @@
-option (ENABLE_CAPNP "Enable Cap'n Proto" ON)
+option (ENABLE_CAPNP "Enable Cap'n Proto" ${NOT_MSVC})
 
 if (ENABLE_CAPNP)
 

cmake/find_llvm.cmake

@@ -1,6 +1,6 @@
-option (USE_EMBEDDED_COMPILER "Set to TRUE to enable support for 'compile' option for query execution" FALSE)
+option (ENABLE_EMBEDDED_COMPILER "Set to TRUE to enable support for 'compile' option for query execution" FALSE)
 
-if (USE_EMBEDDED_COMPILER)
+if (ENABLE_EMBEDDED_COMPILER)
     # Based on source code of YT.
     # Authors: Ivan Puzyrevskiy, Alexey Lukyanchikov, Ruslan Savchenko.
 
@@ -15,10 +15,14 @@ if (USE_EMBEDDED_COMPILER)
     #  llvm_map_components_to_libraries - Maps LLVM used components to required libraries.
     #  Usage: llvm_map_components_to_libraries(REQUIRED_LLVM_LIBRARIES core jit interpreter native ...)
 
-    if (ARCH_FREEBSD)
+    if (CMAKE_CXX_COMPILER_ID STREQUAL "Clang")
-       set(LLVM_VERSION_POSTFIX "50" CACHE INTERNAL "")
+        set(LLVM_VERSION_POSTFIX "${COMPILER_POSTFIX}" CACHE STRING "")
     else()
-       set(LLVM_VERSION_POSTFIX "-5.0" CACHE INTERNAL "")
+        if (ARCH_FREEBSD)
+           set(LLVM_VERSION_POSTFIX "50" CACHE STRING "")
+        else()
+           set(LLVM_VERSION_POSTFIX "-5.0" CACHE STRING "")
+        endif()
     endif()
 
     find_program(LLVM_CONFIG_EXECUTABLE
@@ -28,9 +32,8 @@ if (USE_EMBEDDED_COMPILER)
     mark_as_advanced(LLVM_CONFIG_EXECUTABLE)
 
     if(NOT LLVM_CONFIG_EXECUTABLE)
-        message(FATAL_ERROR "Cannot find LLVM (looking for `llvm-config`). Please, provide LLVM_ROOT environment variable.")
+        message(FATAL_ERROR "Cannot find LLVM (looking for `llvm-config${LLVM_VERSION_POSTFIX}`, `llvm-config`, `llvm-config-devel`). Please, provide LLVM_ROOT environment variable.")
     else()
-
         set(LLVM_FOUND TRUE)
 
         execute_process(
@@ -97,4 +100,8 @@ if (USE_EMBEDDED_COMPILER)
         message(STATUS "LLVM Library Directory: ${LLVM_LIBRARY_DIRS}")
         message(STATUS "LLVM C++ Compiler: ${LLVM_CXXFLAGS}")
     endif()
+
+    if (LLVM_FOUND AND LLVM_INCLUDE_DIRS AND LLVM_LIBRARY_DIRS)
+        set(USE_EMBEDDED_COMPILER TRUE)
+    endif()
 endif()

cmake/find_openssl.cmake

@@ -1,23 +0,0 @@
-set (OPENSSL_USE_STATIC_LIBS ${USE_STATIC_LIBRARIES})
-if (APPLE)
-    set (OPENSSL_ROOT_DIR "/usr/local/opt/openssl")
-    # https://rt.openssl.org/Ticket/Display.html?user=guest&pass=guest&id=2232
-    if (USE_STATIC_LIBRARIES)
-        message(WARNING "Disable USE_STATIC_LIBRARIES if you have linking problems with OpenSSL on MacOS")
-    endif ()
-endif ()
-find_package (OpenSSL)
-if (NOT OPENSSL_FOUND)
-    # Try to find manually.
-    set (OPENSSL_INCLUDE_PATHS "/usr/local/opt/openssl/include")
-    set (OPENSSL_PATHS "/usr/local/opt/openssl/lib")
-    find_path (OPENSSL_INCLUDE_DIR NAMES openssl/ssl.h PATHS ${OPENSSL_INCLUDE_PATHS})
-    find_library (OPENSSL_SSL_LIBRARY ssl PATHS ${OPENSSL_PATHS})
-    find_library (OPENSSL_CRYPTO_LIBRARY crypto PATHS ${OPENSSL_PATHS})
-    if (OPENSSL_SSL_LIBRARY AND OPENSSL_CRYPTO_LIBRARY AND OPENSSL_INCLUDE_DIR)
-        set (OPENSSL_LIBRARIES ${OPENSSL_SSL_LIBRARY} ${OPENSSL_CRYPTO_LIBRARY})
-        set (OPENSSL_FOUND 1)
-    endif ()
-endif ()
-
-message (STATUS "Using openssl=${OPENSSL_FOUND}: ${OPENSSL_INCLUDE_DIR} : ${OPENSSL_LIBRARIES}")

cmake/find_poco.cmake

@@ -57,8 +57,8 @@ elseif (NOT MISSING_INTERNAL_POCO_LIBRARY)
 
     if (USE_STATIC_LIBRARIES AND USE_INTERNAL_ZLIB_LIBRARY)
         list (APPEND Poco_INCLUDE_DIRS
-            "${ClickHouse_SOURCE_DIR}/contrib/zlib-ng/"
+            "${ClickHouse_SOURCE_DIR}/contrib/${INTERNAL_ZLIB_NAME}/"
-            "${ClickHouse_BINARY_DIR}/contrib/zlib-ng/"
+            "${ClickHouse_BINARY_DIR}/contrib/${INTERNAL_ZLIB_NAME}/"
         )
     endif ()
 

cmake/find_rdkafka.cmake

@@ -1,4 +1,4 @@
-option (ENABLE_RDKAFKA "Enable kafka" ON)
+option (ENABLE_RDKAFKA "Enable kafka" ${NOT_MSVC})
 
 if (ENABLE_RDKAFKA)
 

cmake/find_ssl.cmake

@@ -0,0 +1,44 @@
+option (USE_INTERNAL_SSL_LIBRARY "Set to FALSE to use system *ssl library instead of bundled" ${MSVC})
+
+set (OPENSSL_USE_STATIC_LIBS ${USE_STATIC_LIBRARIES})
+
+if (NOT USE_INTERNAL_SSL_LIBRARY)
+    if (APPLE)
+        set (OPENSSL_ROOT_DIR "/usr/local/opt/openssl")
+        # https://rt.openssl.org/Ticket/Display.html?user=guest&pass=guest&id=2232
+        if (USE_STATIC_LIBRARIES)
+            message(WARNING "Disable USE_STATIC_LIBRARIES if you have linking problems with OpenSSL on MacOS")
+        endif ()
+    endif ()
+    find_package (OpenSSL)
+
+    if (NOT OPENSSL_FOUND)
+        # Try to find manually.
+        set (OPENSSL_INCLUDE_PATHS "/usr/local/opt/openssl/include")
+        set (OPENSSL_PATHS "/usr/local/opt/openssl/lib")
+        find_path (OPENSSL_INCLUDE_DIR NAMES openssl/ssl.h PATHS ${OPENSSL_INCLUDE_PATHS})
+        find_library (OPENSSL_SSL_LIBRARY ssl PATHS ${OPENSSL_PATHS})
+        find_library (OPENSSL_CRYPTO_LIBRARY crypto PATHS ${OPENSSL_PATHS})
+        if (OPENSSL_SSL_LIBRARY AND OPENSSL_CRYPTO_LIBRARY AND OPENSSL_INCLUDE_DIR)
+            set (OPENSSL_LIBRARIES ${OPENSSL_SSL_LIBRARY} ${OPENSSL_CRYPTO_LIBRARY})
+            set (OPENSSL_FOUND 1)
+        endif ()
+    endif ()
+endif ()
+
+if (NOT OPENSSL_FOUND)
+    set (USE_INTERNAL_SSL_LIBRARY 1)
+    set (OPENSSL_ROOT_DIR "${ClickHouse_SOURCE_DIR}/contrib/ssl")
+    set (OPENSSL_INCLUDE_DIR "${OPENSSL_ROOT_DIR}/include")
+    if (NOT USE_STATIC_LIBRARIES AND TARGET crypto-shared AND TARGET ssl-shared)
+        set (OPENSSL_CRYPTO_LIBRARY crypto-shared)
+        set (OPENSSL_SSL_LIBRARY ssl-shared)
+    else ()
+        set (OPENSSL_CRYPTO_LIBRARY crypto)
+        set (OPENSSL_SSL_LIBRARY ssl)
+    endif ()
+    set (OPENSSL_LIBRARIES ${OPENSSL_SSL_LIBRARY} ${OPENSSL_CRYPTO_LIBRARY})
+    set (OPENSSL_FOUND 1)
+endif ()
+
+message (STATUS "Using ssl=${OPENSSL_FOUND}: ${OPENSSL_INCLUDE_DIR} : ${OPENSSL_LIBRARIES}")

cmake/find_zlib.cmake

@@ -5,6 +5,15 @@ if (NOT USE_INTERNAL_ZLIB_LIBRARY)
 endif ()
 
 if (NOT ZLIB_FOUND)
+    if (NOT MSVC)
+        set (INTERNAL_ZLIB_NAME "zlib-ng")
+    else ()
+        set (INTERNAL_ZLIB_NAME "zlib")
+        if (NOT EXISTS "${ClickHouse_SOURCE_DIR}/contrib/${INTERNAL_ZLIB_NAME}")
+            message (WARNING "Will use standard zlib, please clone manually:\n git clone https://github.com/madler/zlib.git ${ClickHouse_SOURCE_DIR}/contrib/${INTERNAL_ZLIB_NAME}")
+        endif ()
+    endif ()
+
     set (USE_INTERNAL_ZLIB_LIBRARY 1)
     set (ZLIB_COMPAT 1) # for zlib-ng, also enables WITH_GZFILEOP
     set (WITH_NATIVE_INSTRUCTIONS ${ARCHNATIVE})
@@ -15,7 +24,7 @@ if (NOT ZLIB_FOUND)
         set(WITH_NEON 1 CACHE INTERNAL "")
         set(WITH_ACLE 1 CACHE INTERNAL "")
     endif ()
-    set (ZLIB_INCLUDE_DIR "${ClickHouse_SOURCE_DIR}/contrib/zlib-ng" "${ClickHouse_BINARY_DIR}/contrib/zlib-ng") # generated zconf.h
+    set (ZLIB_INCLUDE_DIR "${ClickHouse_SOURCE_DIR}/contrib/${INTERNAL_ZLIB_NAME}" "${ClickHouse_BINARY_DIR}/contrib/${INTERNAL_ZLIB_NAME}") # generated zconf.h
     set (ZLIB_INCLUDE_DIRS ${ZLIB_INCLUDE_DIR}) # for poco
     set (ZLIB_FOUND 1) # for poco
     if (USE_STATIC_LIBRARIES)

cmake/lib_name.cmake

@@ -1,4 +1,3 @@
-
 set(DIVIDE_INCLUDE_DIR ${ClickHouse_SOURCE_DIR}/contrib/libdivide)
 set(CITYHASH_CONTRIB_INCLUDE_DIR ${ClickHouse_SOURCE_DIR}/contrib/libcityhash/include)
 set(COMMON_INCLUDE_DIR ${ClickHouse_SOURCE_DIR}/libs/libcommon/include ${ClickHouse_BINARY_DIR}/libs/libcommon/include)

cmake/print_flags.cmake

@@ -0,0 +1,6 @@
+set (FULL_C_FLAGS "${CMAKE_C_FLAGS} ${CMAKE_C_FLAGS_${CMAKE_BUILD_TYPE_UC}}")
+set (FULL_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${CMAKE_CXX_FLAGS_${CMAKE_BUILD_TYPE_UC}}")
+set (FULL_EXE_LINKER_FLAGS "${CMAKE_EXE_LINKER_FLAGS} ${CMAKE_EXE_LINKER_FLAGS_${CMAKE_BUILD_TYPE_UC}}")
+message (STATUS "compiler C   = ${CMAKE_C_COMPILER} ${FULL_C_FLAGS}")
+message (STATUS "compiler CXX = ${CMAKE_CXX_COMPILER} ${FULL_CXX_FLAGS}")
+message (STATUS "LINKER_FLAGS = ${FULL_EXE_LINKER_FLAGS}")

cmake/sanitize.cmake

@@ -0,0 +1,27 @@
+set (SAN_FLAGS "${SAN_FLAGS} -g -fno-omit-frame-pointer")
+if (SAN_DEBUG)
+    set (SAN_FLAGS "${SAN_FLAGS} -O0")
+else ()
+    set (SAN_FLAGS "${SAN_FLAGS} -O3")
+endif ()
+
+set (CMAKE_CXX_FLAGS_ASAN                "${CMAKE_CXX_FLAGS_ASAN}  ${SAN_FLAGS} -fsanitize=address")
+set (CMAKE_C_FLAGS_ASAN                  "${CMAKE_C_FLAGS_ASAN}    ${SAN_FLAGS} -fsanitize=address")
+set (CMAKE_EXE_LINKER_FLAGS_ASAN         "${CMAKE_EXE_LINKER_FLAGS_ASAN}        -fsanitize=address")
+set (CMAKE_CXX_FLAGS_UBSAN               "${CMAKE_CXX_FLAGS_UBSAN} ${SAN_FLAGS} -fsanitize=undefined")
+set (CMAKE_C_FLAGS_UBSAN                 "${CMAKE_C_FLAGS_UBSAN}   ${SAN_FLAGS} -fsanitize=undefined")
+set (CMAKE_EXE_LINKER_FLAGS_UBSAN        "${CMAKE_EXE_LINKER_FLAGS_UBSAN}       -fsanitize=undefined")
+set (CMAKE_CXX_FLAGS_MSAN                "${CMAKE_CXX_FLAGS_MSAN}  ${SAN_FLAGS} -fsanitize=memory")
+set (CMAKE_C_FLAGS_MSAN                  "${CMAKE_C_FLAGS_MSAN}    ${SAN_FLAGS} -fsanitize=memory")
+set (CMAKE_EXE_LINKER_FLAGS_MSAN         "${CMAKE_EXE_LINKER_FLAGS_MSAN}        -fsanitize=memory")
+set (CMAKE_CXX_FLAGS_TSAN                "${CMAKE_CXX_FLAGS_TSAN}  ${SAN_FLAGS} -fsanitize=thread")
+set (CMAKE_C_FLAGS_TSAN                  "${CMAKE_C_FLAGS_TSAN}    ${SAN_FLAGS} -fsanitize=thread")
+set (CMAKE_EXE_LINKER_FLAGS_TSAN         "${CMAKE_EXE_LINKER_FLAGS_TSAN}        -fsanitize=thread")
+
+# clang use static linking by default
+if (MAKE_STATIC_LIBRARIES AND CMAKE_CXX_COMPILER_ID STREQUAL "GNU")
+    set (CMAKE_EXE_LINKER_FLAGS_ASAN     "${CMAKE_EXE_LINKER_FLAGS_ASAN} -static-libasan")
+    set (CMAKE_EXE_LINKER_FLAGS_UBSAN    "${CMAKE_EXE_LINKER_FLAGS_UBSAN} -static-libubsan")
+    set (CMAKE_EXE_LINKER_FLAGS_MSAN     "${CMAKE_EXE_LINKER_FLAGS_MSAN} -static-libmsan")
+    set (CMAKE_EXE_LINKER_FLAGS_TSAN     "${CMAKE_EXE_LINKER_FLAGS_TSAN} -static-libtsan")
+endif ()

contrib/CMakeLists.txt

@@ -1,4 +1,6 @@
-set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-old-style-cast")
+if (NOT MSVC)
+    set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-old-style-cast")
+endif ()
 
 if (USE_INTERNAL_BOOST_LIBRARY)
     add_subdirectory (libboost)
@@ -48,7 +50,7 @@ if (USE_INTERNAL_UNWIND_LIBRARY)
 endif ()
 
 if (USE_INTERNAL_ZLIB_LIBRARY)
-    add_subdirectory (zlib-ng)
+    add_subdirectory (${INTERNAL_ZLIB_NAME})
     # todo: make pull to Dead2/zlib-ng and remove:
     # We should use same defines when including zlib.h as used when zlib compiled
     target_compile_definitions (zlib PUBLIC ZLIB_COMPAT WITH_GZFILEOP)
@@ -81,16 +83,39 @@ if (NOT ARCH_ARM)
     add_subdirectory (libcpuid)
 endif ()
 
+if (USE_INTERNAL_SSL_LIBRARY)
+    if (NOT MAKE_STATIC_LIBRARIES)
+        set (BUILD_SHARED 1)
+    endif ()
+    set (USE_SHARED ${USE_STATIC_LIBRARIES})
+    add_subdirectory (ssl)
+    target_include_directories(${OPENSSL_CRYPTO_LIBRARY} PUBLIC ${OPENSSL_INCLUDE_DIR})
+    target_include_directories(${OPENSSL_SSL_LIBRARY} PUBLIC ${OPENSSL_INCLUDE_DIR})
+endif ()
+
 if (USE_INTERNAL_RDKAFKA_LIBRARY)
     set (RDKAFKA_BUILD_EXAMPLES OFF CACHE INTERNAL "")
     set (RDKAFKA_BUILD_TESTS OFF CACHE INTERNAL "")
-    set (RDKAFKA_BUILD_STATIC ON CACHE INTERNAL "")
+    set (RDKAFKA_BUILD_STATIC ${MAKE_STATIC_LIBRARIES} CACHE INTERNAL "")
     mark_as_advanced (ZLIB_INCLUDE_DIR)
+
+    if (USE_INTERNAL_SSL_LIBRARY)
+        add_library(bundled-ssl ALIAS ${OPENSSL_SSL_LIBRARY})
+        set (WITH_BUNDLED_SSL 1)
+    endif ()
+
     add_subdirectory (librdkafka)
+
+    if (USE_INTERNAL_SSL_LIBRARY)
+        target_include_directories(rdkafka PRIVATE BEFORE ${OPENSSL_INCLUDE_DIR})
+    endif ()
+    target_include_directories(rdkafka PRIVATE BEFORE ${ZLIB_INCLUDE_DIR})
 endif ()
 
 if (USE_INTERNAL_CAPNP_LIBRARY)
-    if (NOT APPLE) # tests never end
+    if (APPLE) # tests never end
+        set (BUILD_TESTING 0 CACHE INTERNAL "")
+    else ()
         set (BUILD_TESTING ${ENABLE_TESTS} CACHE INTERNAL "")
     endif ()
     set (_save ${CMAKE_CXX_EXTENSIONS})
@@ -102,17 +127,23 @@ endif ()
 
 
 if (USE_INTERNAL_POCO_LIBRARY)
+    set (ALLOW_DUPLICATE_CUSTOM_TARGETS 1)
     set (save_CMAKE_CXX_FLAGS ${CMAKE_CXX_FLAGS})
     set (save_CMAKE_C_FLAGS ${CMAKE_C_FLAGS})
     set (_save ${ENABLE_TESTS})
     set (ENABLE_TESTS 0)
     set (CMAKE_DISABLE_FIND_PACKAGE_ZLIB 1)
+    if (USE_INTERNAL_SSL_LIBRARY)
+        set (DISABLE_INTERNAL_OPENSSL 1)
+        set (ENABLE_NETSSL 0) # TODO!
+        set (ENABLE_CRYPTO 0) # TODO!
+    endif ()
     add_subdirectory (poco)
     unset (CMAKE_DISABLE_FIND_PACKAGE_ZLIB)
     set (ENABLE_TESTS ${_save})
     set (CMAKE_CXX_FLAGS ${save_CMAKE_CXX_FLAGS})
     set (CMAKE_C_FLAGS ${save_CMAKE_C_FLAGS})
-    if (OPENSSL_FOUND)
+    if (OPENSSL_FOUND AND TARGET Crypto)
         # Bug in poco https://github.com/pocoproject/poco/pull/2100 found on macos
         target_include_directories(Crypto PUBLIC ${OPENSSL_INCLUDE_DIR})
     endif ()

contrib/libboost/CMakeLists.txt

@@ -1,5 +1,6 @@
-add_definitions(-Wno-unused-variable)
+if (NOT MSVC)
-add_definitions(-Wno-deprecated-declarations)
+    add_definitions(-Wno-unused-variable -Wno-deprecated-declarations)
+endif ()
 
 add_library(boost_program_options_internal
 boost_1_65_0/libs/program_options/src/cmdline.cpp

contrib/poco

@@ -1 +1 @@
-Subproject commit 81d4fdfcb887f89b0f7b1e9b503cbe63e6d8366b
+Subproject commit cf1ad2e9a30ee9161772dc7bc9bf6e165cc51768

contrib/ssl

@@ -0,0 +1 @@
+Subproject commit 6fbe1c6f404193989c5f6a63115d80fbe34ce2a3

dbms/CMakeLists.txt

@@ -18,7 +18,9 @@ get_property (BUILD_INCLUDE_DIRECTORIES DIRECTORY ${ClickHouse_SOURCE_DIR} PROPE
 string (TIMESTAMP BUILD_DATE "%Y-%m-%d" UTC)
 configure_file (${CMAKE_CURRENT_SOURCE_DIR}/src/Common/config_build.cpp.in ${CONFIG_BUILD})
 
-set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wextra")
+if (NOT MSVC)
+    set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wextra")
+endif ()
 
 if (NOT NO_WERROR)
     set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Werror")
@@ -77,13 +79,17 @@ list (APPEND dbms_headers
     src/AggregateFunctions/FactoryHelpers.h
     src/AggregateFunctions/parseAggregateFunctionParameters.h)
 
-list (APPEND dbms_sources src/TableFunctions/TableFunctionFactory.cpp)
+list (APPEND dbms_sources src/TableFunctions/ITableFunction.cpp src/TableFunctions/TableFunctionFactory.cpp)
 list (APPEND dbms_headers src/TableFunctions/ITableFunction.h src/TableFunctions/TableFunctionFactory.h)
 
 add_library(clickhouse_common_io ${SPLIT_SHARED} ${clickhouse_common_io_headers} ${clickhouse_common_io_sources})
 
+if (ARCH_FREEBSD)
+    target_compile_definitions (clickhouse_common_io PUBLIC CLOCK_MONOTONIC_COARSE=CLOCK_MONOTONIC_FAST)
+endif ()
+
 add_subdirectory(src/Common/ZooKeeper)
-add_subdirectory(src/Common/ConfigProcessor)
+add_subdirectory(src/Common/Config)
 
 if (MAKE_STATIC_LIBRARIES)
     add_library(dbms ${dbms_headers} ${dbms_sources})
@@ -137,7 +143,7 @@ target_link_libraries (clickhouse_common_io
 
 target_link_libraries (dbms
     clickhouse_parsers
-    clickhouse_common_configprocessor
+    clickhouse_common_config
     clickhouse_common_io
     ${MYSQLXX_LIBRARY}
     ${FARMHASH_LIBRARIES}
@@ -162,6 +168,7 @@ endif ()
 
 if (Poco_DataODBC_FOUND)
     target_link_libraries (dbms ${Poco_DataODBC_LIBRARY})
+    target_include_directories (dbms PRIVATE ${ODBC_INCLUDE_DIRECTORIES})
 endif()
 
 if (Poco_MongoDB_FOUND)

dbms/src/AggregateFunctions/AggregateFunctionQuantile.cpp

@@ -4,13 +4,6 @@
 
 #include <AggregateFunctions/AggregateFunctionQuantile.h>
 
-#include <AggregateFunctions/QuantileReservoirSampler.h>
-#include <AggregateFunctions/QuantileReservoirSamplerDeterministic.h>
-#include <AggregateFunctions/QuantileExact.h>
-#include <AggregateFunctions/QuantileExactWeighted.h>
-#include <AggregateFunctions/QuantileTiming.h>
-#include <AggregateFunctions/QuantileTDigest.h>
-
 #include <DataTypes/DataTypeDate.h>
 #include <DataTypes/DataTypeDateTime.h>
 
@@ -55,27 +48,6 @@ AggregateFunctionPtr createAggregateFunctionQuantile(const std::string & name, c
 
 #undef FOR_NUMERIC_TYPES
 
-
-struct NameQuantile { static constexpr auto name = "quantile"; };
-struct NameQuantiles { static constexpr auto name = "quantiles"; };
-struct NameQuantileDeterministic { static constexpr auto name = "quantileDeterministic"; };
-struct NameQuantilesDeterministic { static constexpr auto name = "quantilesDeterministic"; };
-
-struct NameQuantileExact { static constexpr auto name = "quantileExact"; };
-struct NameQuantileExactWeighted { static constexpr auto name = "quantileExactWeighted"; };
-struct NameQuantilesExact { static constexpr auto name = "quantilesExact"; };
-struct NameQuantilesExactWeighted { static constexpr auto name = "quantilesExactWeighted"; };
-
-struct NameQuantileTiming { static constexpr auto name = "quantileTiming"; };
-struct NameQuantileTimingWeighted { static constexpr auto name = "quantileTimingWeighted"; };
-struct NameQuantilesTiming { static constexpr auto name = "quantilesTiming"; };
-struct NameQuantilesTimingWeighted { static constexpr auto name = "quantilesTimingWeighted"; };
-
-struct NameQuantileTDigest { static constexpr auto name = "quantileTDigest"; };
-struct NameQuantileTDigestWeighted { static constexpr auto name = "quantileTDigestWeighted"; };
-struct NameQuantilesTDigest { static constexpr auto name = "quantilesTDigest"; };
-struct NameQuantilesTDigestWeighted { static constexpr auto name = "quantilesTDigestWeighted"; };
-
 }
 
 void registerAggregateFunctionsQuantile(AggregateFunctionFactory & factory)

dbms/src/AggregateFunctions/AggregateFunctionQuantile.h

@@ -158,3 +158,37 @@ public:
 };
 
 }
+
+
+/// These must be exposed in header for the purpose of dynamic compilation.
+#include <AggregateFunctions/QuantileReservoirSampler.h>
+#include <AggregateFunctions/QuantileReservoirSamplerDeterministic.h>
+#include <AggregateFunctions/QuantileExact.h>
+#include <AggregateFunctions/QuantileExactWeighted.h>
+#include <AggregateFunctions/QuantileTiming.h>
+#include <AggregateFunctions/QuantileTDigest.h>
+
+namespace DB
+{
+
+struct NameQuantile { static constexpr auto name = "quantile"; };
+struct NameQuantiles { static constexpr auto name = "quantiles"; };
+struct NameQuantileDeterministic { static constexpr auto name = "quantileDeterministic"; };
+struct NameQuantilesDeterministic { static constexpr auto name = "quantilesDeterministic"; };
+
+struct NameQuantileExact { static constexpr auto name = "quantileExact"; };
+struct NameQuantileExactWeighted { static constexpr auto name = "quantileExactWeighted"; };
+struct NameQuantilesExact { static constexpr auto name = "quantilesExact"; };
+struct NameQuantilesExactWeighted { static constexpr auto name = "quantilesExactWeighted"; };
+
+struct NameQuantileTiming { static constexpr auto name = "quantileTiming"; };
+struct NameQuantileTimingWeighted { static constexpr auto name = "quantileTimingWeighted"; };
+struct NameQuantilesTiming { static constexpr auto name = "quantilesTiming"; };
+struct NameQuantilesTimingWeighted { static constexpr auto name = "quantilesTimingWeighted"; };
+
+struct NameQuantileTDigest { static constexpr auto name = "quantileTDigest"; };
+struct NameQuantileTDigestWeighted { static constexpr auto name = "quantileTDigestWeighted"; };
+struct NameQuantilesTDigest { static constexpr auto name = "quantilesTDigest"; };
+struct NameQuantilesTDigestWeighted { static constexpr auto name = "quantilesTDigestWeighted"; };
+
+}

dbms/src/AggregateFunctions/UniquesHashSet.h

@@ -59,7 +59,7 @@
 
 
 /** This hash function is not the most optimal, but UniquesHashSet states counted with it,
-  * stored in many places on disks (in the Meter), so it continues to be used.
+  * stored in many places on disks (in the Yandex.Metrika), so it continues to be used.
   */
 struct UniquesHashSetDefaultHash
 {
@@ -337,8 +337,8 @@ public:
         /** Correction of a systematic error due to collisions during hashing in UInt32.
           * `fixed_res(res)` formula
           * - with how many different elements of fixed_res,
-          *   when randomly scattered across 2^32 baskets,
+          *   when randomly scattered across 2^32 buckets,
-          *   filled baskets with average of res is obtained.
+          *   filled buckets with average of res is obtained.
           */
         size_t p32 = 1ULL << 32;
         size_t fixed_res = round(p32 * (log(p32) - log(p32 - res)));

dbms/src/Analyzers/AnalyzeColumns.cpp

@@ -135,7 +135,7 @@ ASTPtr createASTIdentifierForColumnInTable(const String & column, const CollectT
 {
     ASTPtr database_name_identifier_node;
     if (!table.database_name.empty())
-        database_name_identifier_node =  std::make_shared<ASTIdentifier>(StringRange(), table.database_name, ASTIdentifier::Column);
+        database_name_identifier_node =  std::make_shared<ASTIdentifier>(table.database_name, ASTIdentifier::Column);
 
     ASTPtr table_name_identifier_node;
     String table_name_or_alias;
@@ -146,9 +146,9 @@ ASTPtr createASTIdentifierForColumnInTable(const String & column, const CollectT
         table_name_or_alias = table.alias;
 
     if (!table_name_or_alias.empty())
-        table_name_identifier_node = std::make_shared<ASTIdentifier>(StringRange(), table_name_or_alias, ASTIdentifier::Column);
+        table_name_identifier_node = std::make_shared<ASTIdentifier>(table_name_or_alias, ASTIdentifier::Column);
 
-    ASTPtr column_identifier_node = std::make_shared<ASTIdentifier>(StringRange(), column, ASTIdentifier::Column);
+    ASTPtr column_identifier_node = std::make_shared<ASTIdentifier>(column, ASTIdentifier::Column);
 
     String compound_name;
     if (database_name_identifier_node)
@@ -157,8 +157,7 @@ ASTPtr createASTIdentifierForColumnInTable(const String & column, const CollectT
         compound_name += table_name_or_alias + ".";
     compound_name += column;
 
-    auto elem = std::make_shared<ASTIdentifier>(
+    auto elem = std::make_shared<ASTIdentifier>(compound_name, ASTIdentifier::Column);
-        StringRange(), compound_name, ASTIdentifier::Column);
 
     if (database_name_identifier_node)
         elem->children.emplace_back(std::move(database_name_identifier_node));
@@ -385,7 +384,7 @@ void AnalyzeColumns::process(ASTPtr & ast, const CollectAliases & aliases, const
 
     for (auto & child : ast->children)
     {
-        if (select && (child.get() == select->format.get() || child.get() == select->settings.get()))
+        if (select && child.get() == select->settings.get())
             continue;
 
         processImpl(child, columns, aliases, tables);

dbms/src/Analyzers/TypeAndConstantInference.cpp

@@ -6,6 +6,7 @@
 #include <Analyzers/AnalyzeResultOfQuery.h>
 #include <Interpreters/Context.h>
 #include <Interpreters/ExpressionActions.h>
+#include <Interpreters/convertFieldToType.h>
 #include <Parsers/ASTSelectQuery.h>
 #include <Parsers/ASTTablesInSelectQuery.h>
 #include <Parsers/ASTIdentifier.h>
@@ -72,8 +73,8 @@ void processLiteral(const String & column_name, const ASTPtr & ast, TypeAndConst
     TypeAndConstantInference::ExpressionInfo expression_info;
     expression_info.node = ast;
     expression_info.is_constant_expression = true;
-    expression_info.value = literal->value;
+    expression_info.data_type = applyVisitor(FieldToDataType(), literal->value);
-    expression_info.data_type = applyVisitor(FieldToDataType(), expression_info.value);
+    expression_info.value = convertFieldToType(literal->value, *expression_info.data_type);
     info.emplace(column_name, std::move(expression_info));
 }
 

dbms/src/Client/Connection.cpp

@@ -393,7 +393,7 @@ void Connection::sendData(const Block & block, const String & name)
         else
             maybe_compressed_out = out;
 
-        block_out = std::make_shared<NativeBlockOutputStream>(*maybe_compressed_out, server_revision);
+        block_out = std::make_shared<NativeBlockOutputStream>(*maybe_compressed_out, server_revision, block.cloneEmpty());
     }
 
     writeVarUInt(Protocol::Client::Data, *out);

dbms/src/Client/MultiplexedConnections.h

@@ -3,7 +3,6 @@
 #include <Common/Throttler.h>
 #include <Client/Connection.h>
 #include <Client/ConnectionPoolWithFailover.h>
-#include <Poco/ScopedLock.h>
 #include <mutex>
 
 namespace DB

dbms/src/Columns/ColumnNullable.h

@@ -78,6 +78,7 @@ public:
     bool isFixedAndContiguous() const override { return false; }
     bool valuesHaveFixedSize() const override { return nested_column->valuesHaveFixedSize(); }
     size_t sizeOfValueIfFixed() const override { return null_map->sizeOfValueIfFixed() + nested_column->sizeOfValueIfFixed(); }
+    bool onlyNull() const override { return nested_column->isDummy(); }
 
 
     /// Return the column that represents values.

dbms/src/Common/AIO.h

@@ -160,7 +160,7 @@ class AIOContextPool : public ext::singleton<AIOContextPool>
             const auto it = promises.find(id);
             if (it == std::end(promises))
             {
-                LOG_CRITICAL(&Poco::Logger::get("AIOcontextPool"), "Found io_event with unknown id " << id);
+                LOG_ERROR(&Poco::Logger::get("AIOcontextPool"), "Found io_event with unknown id " << id);
                 continue;
             }
 

dbms/src/Common/ActionBlocker.h

@@ -16,8 +16,8 @@ public:
     bool isCancelled() const { return counter > 0; }
 
     /// Temporarily blocks corresponding actions (while the returned object is alive)
-    struct BlockHolder;
+    struct LockHolder;
-    BlockHolder cancel() const { return BlockHolder(this); }
+    LockHolder cancel() const { return LockHolder(this); }
 
     /// Cancel the actions forever.
     void cancelForever() const { ++counter; }
@@ -26,30 +26,30 @@ public:
     auto & getCounter() { return counter; }
 
     /// Blocks related action while a BlockerHolder instance exists
-    struct BlockHolder
+    struct LockHolder
     {
-        explicit BlockHolder(const ActionBlocker * var_ = nullptr) : var(var_)
+        explicit LockHolder(const ActionBlocker * var_ = nullptr) : var(var_)
         {
             if (var)
                 ++var->counter;
         }
 
-        BlockHolder(BlockHolder && other) noexcept
+        LockHolder(LockHolder && other) noexcept
         {
             *this = std::move(other);
         }
 
-        BlockHolder & operator=(BlockHolder && other) noexcept
+        LockHolder & operator=(LockHolder && other) noexcept
         {
             var = other.var;
             other.var = nullptr;
             return *this;
         }
 
-        BlockHolder(const BlockHolder & other) = delete;
+        LockHolder(const LockHolder & other) = delete;
-        BlockHolder & operator=(const BlockHolder & other) = delete;
+        LockHolder & operator=(const LockHolder & other) = delete;
 
-        ~BlockHolder()
+        ~LockHolder()
         {
             if (var)
                 --var->counter;

dbms/src/Common/Config/CMakeLists.txt

@@ -0,0 +1,9 @@
+
+include(${ClickHouse_SOURCE_DIR}/cmake/dbms_glob_sources.cmake)
+
+add_headers_and_sources(clickhouse_common_config .)
+
+add_library(clickhouse_common_config ${SPLIT_SHARED} ${clickhouse_common_config_headers} ${clickhouse_common_config_sources})
+
+target_link_libraries (clickhouse_common_config clickhouse_common_zookeeper string_utils)
+target_include_directories (clickhouse_common_config PRIVATE ${DBMS_INCLUDE_DIR})

dbms/src/Common/Config/ConfigProcessor.cpp

@@ -377,7 +377,9 @@ ConfigProcessor::Files ConfigProcessor::getConfigMergeFiles(const std::string &
         for (Poco::DirectoryIterator it(merge_dir_name); it != Poco::DirectoryIterator(); ++it)
         {
             Poco::File & file = *it;
-            if (file.isFile() && (endsWith(file.path(), ".xml") || endsWith(file.path(), ".conf")))
+            if (file.isFile()
+                && (endsWith(file.path(), ".xml") || endsWith(file.path(), ".conf"))
+                && !startsWith(file.path(), ".")) // skip temporary files
             {
                 files.push_back(file.path());
             }

dbms/src/Common/Config/ConfigReloader.cpp

@@ -2,12 +2,9 @@
 
 #include <Poco/Util/Application.h>
 #include <Poco/File.h>
-
 #include <common/logger_useful.h>
-
-#include <Interpreters/Context.h>
 #include <Common/setThreadName.h>
-#include <Common/ConfigProcessor/ConfigProcessor.h>
+#include "ConfigProcessor.h"
 
 
 namespace DB

dbms/src/Common/Config/ConfigReloader.h

@@ -1,9 +1,8 @@
 #pragma once
 
-#include <Common/ConfigProcessor/ConfigProcessor.h>
+#include "ConfigProcessor.h"
 #include <Common/ZooKeeper/Common.h>
 #include <Common/ZooKeeper/ZooKeeperNodeCache.h>
-
 #include <time.h>
 #include <string>
 #include <thread>

dbms/src/Common/ConfigProcessor/CMakeLists.txt

@@ -1,9 +0,0 @@
-
-include(${ClickHouse_SOURCE_DIR}/cmake/dbms_glob_sources.cmake)
-
-add_headers_and_sources(clickhouse_common_configprocessor .)
-
-add_library(clickhouse_common_configprocessor ${SPLIT_SHARED} ${clickhouse_common_configprocessor_headers} ${clickhouse_common_configprocessor_sources})
-
-target_link_libraries (clickhouse_common_configprocessor clickhouse_common_zookeeper string_utils)
-target_include_directories (clickhouse_common_configprocessor PRIVATE ${DBMS_INCLUDE_DIR})

dbms/src/Common/CounterInFile.h

@@ -9,7 +9,6 @@
 #include <Poco/File.h>
 #include <Poco/Exception.h>
 #include <mutex>
-#include <Poco/ScopedLock.h>
 
 #include <Common/Exception.h>
 #include <IO/ReadBufferFromFileDescriptor.h>

dbms/src/Common/ErrorCodes.cpp

@@ -262,7 +262,6 @@ namespace ErrorCodes
     extern const int PARTITION_ALREADY_EXISTS = 256;
     extern const int PARTITION_DOESNT_EXIST = 257;
     extern const int UNION_ALL_RESULT_STRUCTURES_MISMATCH = 258;
-    extern const int UNION_ALL_COLUMN_ALIAS_MISMATCH = 259;
     extern const int CLIENT_OUTPUT_FORMAT_SPECIFIED = 260;
     extern const int UNKNOWN_BLOCK_INFO_FIELD = 261;
     extern const int BAD_COLLATION = 262;
@@ -368,6 +367,8 @@ namespace ErrorCodes
     extern const int INSERT_WAS_DEDUPLICATED = 389;
     extern const int CANNOT_GET_CREATE_TABLE_QUERY = 390;
     extern const int EXTERNAL_LIBRARY_ERROR = 391;
+    extern const int QUERY_IS_PROHIBITED = 392;
+    extern const int THERE_IS_NO_QUERY = 393;
 
 
     extern const int KEEPER_EXCEPTION = 999;

dbms/src/Common/ProfileEvents.cpp

@@ -30,6 +30,7 @@
     M(ArenaAllocChunks) \
     M(ArenaAllocBytes) \
     M(FunctionExecute) \
+    M(TableFunctionExecute) \
     M(MarkCacheHits) \
     M(MarkCacheMisses) \
     M(CreatedReadBufferOrdinary) \

dbms/src/Common/Stopwatch.h

@@ -1,14 +1,25 @@
 #pragma once
 
 #include <time.h>
-#include <mutex>
+#include <atomic>
-#include <Poco/ScopedLock.h>
 #include <common/Types.h>
 
 #ifdef __APPLE__
 #include <common/apple_rt.h>
 #endif
 
+
+namespace StopWatchDetail
+{
+    inline UInt64 nanoseconds(clockid_t clock_type)
+    {
+        struct timespec ts;
+        clock_gettime(clock_type, &ts);
+        return ts.tv_sec * 1000000000ULL + ts.tv_nsec;
+    }
+}
+
+
 /** Differs from Poco::Stopwatch only by using 'clock_gettime' instead of 'gettimeofday',
   *  returns nanoseconds instead of microseconds, and also by other minor differencies.
   */
@@ -18,77 +29,64 @@ public:
     /** CLOCK_MONOTONIC works relatively efficient (~15 million calls/sec) and doesn't lead to syscall.
       * Pass CLOCK_MONOTONIC_COARSE, if you need better performance with acceptable cost of several milliseconds of inaccuracy.
       */
-    Stopwatch(clockid_t clock_type_ = CLOCK_MONOTONIC) : clock_type(clock_type_) { restart(); }
+    Stopwatch(clockid_t clock_type_ = CLOCK_MONOTONIC) : clock_type(clock_type_) { start(); }
 
-    void start()                        { setStart(); is_running = true; }
+    void start()                        { start_ns = nanoseconds(); is_running = true; }
-    void stop()                         { updateElapsed(); is_running = false; }
+    void stop()                         { stop_ns = nanoseconds(); is_running = false; }
-    void restart()                      { elapsed_ns = 0; start(); }
+    void restart()                      { start(); }
-    UInt64 elapsed() const              { updateElapsed(); return elapsed_ns; }
+    UInt64 elapsed() const              { return is_running ? nanoseconds() - start_ns : stop_ns - start_ns; }
-    UInt64 elapsedMilliseconds() const  { updateElapsed(); return elapsed_ns / 1000000UL; }
+    UInt64 elapsedMilliseconds() const  { return elapsed() / 1000000UL; }
-    double elapsedSeconds() const       { updateElapsed(); return static_cast<double>(elapsed_ns) / 1000000000ULL; }
+    double elapsedSeconds() const       { return static_cast<double>(elapsed()) / 1000000000ULL; }
 
 private:
-    mutable UInt64 start_ns;
+    UInt64 start_ns = 0;
-    mutable UInt64 elapsed_ns;
+    UInt64 stop_ns = 0;
     clockid_t clock_type;
-    bool is_running;
+    bool is_running = false;
 
-    void setStart()
+    UInt64 nanoseconds() const { return StopWatchDetail::nanoseconds(clock_type); }
-    {
-        struct timespec ts;
-        clock_gettime(clock_type, &ts);
-        start_ns = ts.tv_sec * 1000000000ULL + ts.tv_nsec;
-    }
-
-    void updateElapsed() const
-    {
-        if (is_running)
-        {
-            struct timespec ts;
-            clock_gettime(clock_type, &ts);
-            UInt64 current_ns = ts.tv_sec * 1000000000ULL + ts.tv_nsec;
-            elapsed_ns += current_ns - start_ns;
-            start_ns = current_ns;
-        }
-    }
 };
 
 
-class StopwatchWithLock : public Stopwatch
+class AtomicStopwatch
 {
 public:
-    /** If specified amount of time has passed and timer is not locked right now, then restarts timer and returns true.
+    AtomicStopwatch(clockid_t clock_type_ = CLOCK_MONOTONIC) : clock_type(clock_type_) { restart(); }
+
+    void restart()                      { start_ns = nanoseconds(); }
+    UInt64 elapsed() const              { return nanoseconds() - start_ns; }
+    UInt64 elapsedMilliseconds() const  { return elapsed() / 1000000UL; }
+    double elapsedSeconds() const       { return static_cast<double>(elapsed()) / 1000000000ULL; }
+
+    /** If specified amount of time has passed, then restarts timer and returns true.
       * Otherwise returns false.
       * This is done atomically.
       */
-    bool lockTestAndRestart(double seconds)
+    bool compareAndRestart(double seconds)
     {
-        std::unique_lock<std::mutex> lock(mutex, std::defer_lock);
+        UInt64 threshold = seconds * 1000000000ULL;
-        if (!lock.try_lock())
+        UInt64 current_ns = nanoseconds();
+        UInt64 current_start_ns = start_ns;
+
+        while (true)
+        {
+            if (current_ns < current_start_ns + threshold)
                 return false;
 
-        if (elapsedSeconds() >= seconds)
+            if (start_ns.compare_exchange_weak(current_start_ns, current_ns))
-        {
-            restart();
                 return true;
         }
-        else
-            return false;
     }
 
     struct Lock
     {
-        StopwatchWithLock * parent = nullptr;
+        AtomicStopwatch * parent = nullptr;
-        std::unique_lock<std::mutex> lock;
 
         Lock() {}
 
         operator bool() const { return parent != nullptr; }
 
-        Lock(StopwatchWithLock * parent, std::unique_lock<std::mutex> && lock)
+        Lock(AtomicStopwatch * parent) : parent(parent) {}
-            : parent(parent), lock(std::move(lock))
-        {
-        }
 
         Lock(Lock &&) = default;
 
@@ -105,21 +103,33 @@ public:
       * This is done atomically.
       *
       * Usage:
-      * if (auto lock = timer.lockTestAndRestartAfter(1))
+      * if (auto lock = timer.compareAndRestartDeferred(1))
       *        /// do some work, that must be done in one thread and not more frequently than each second.
       */
-    Lock lockTestAndRestartAfter(double seconds)
+    Lock compareAndRestartDeferred(double seconds)
     {
-        std::unique_lock<std::mutex> lock(mutex, std::defer_lock);
+        UInt64 threshold = seconds * 1000000000ULL;
-        if (!lock.try_lock())
+        UInt64 current_ns = nanoseconds();
+        UInt64 current_start_ns = start_ns;
+
+        while (true)
+        {
+            if ((current_start_ns & 0x8000000000000000ULL))
                 return {};
 
-        if (elapsedSeconds() >= seconds)
+            if (current_ns < current_start_ns + threshold)
-            return Lock(this, std::move(lock));
-
                 return {};
+
+            if (start_ns.compare_exchange_weak(current_start_ns, current_ns | 0x8000000000000000ULL))
+                return Lock(this);
+        }
     }
 
 private:
-    std::mutex mutex;
+    std::atomic<UInt64> start_ns;
+    std::atomic<bool> lock {false};
+    clockid_t clock_type;
+
+    /// Most significant bit is a lock. When it is set, compareAndRestartDeferred method will return false.
+    UInt64 nanoseconds() const { return StopWatchDetail::nanoseconds(clock_type) & 0x7FFFFFFFFFFFFFFFULL; }
 };

dbms/src/Common/ZooKeeper/ZooKeeper.cpp

@@ -641,7 +641,8 @@ int32_t ZooKeeper::tryMulti(const Ops & ops_, OpResultsPtr * out_results_)
 int32_t ZooKeeper::tryMultiUnsafe(const Ops & ops, MultiTransactionInfo & info)
 {
     info.code = multiImpl(ops, &info.op_results);
-    info.ops = &ops;
+    for (const OpPtr & op : ops)
+        info.ops.emplace_back(op->clone());
     return info.code;
 }
 

dbms/src/Common/ZooKeeper/ZooKeeper.h

@@ -499,13 +499,13 @@ struct MultiTransactionInfo
 {
     MultiTransactionInfo() = default;
 
-    const Ops * ops = nullptr;
+    Ops ops;
     int32_t code = ZOK;
     OpResultsPtr op_results;
 
     bool empty() const
     {
-        return ops == nullptr;
+        return ops.empty();
     }
 
     bool hasFailedOp() const
@@ -515,7 +515,7 @@ struct MultiTransactionInfo
 
     const Op & getFailedOp() const
     {
-        return *ops->at(getFailedOpIndex(op_results, code));
+        return *ops.at(getFailedOpIndex(op_results, code));
     }
 
     KeeperException getException() const
@@ -523,7 +523,7 @@ struct MultiTransactionInfo
         if (hasFailedOp())
         {
             size_t i = getFailedOpIndex(op_results, code);
-            return KeeperException("Transaction failed at op #" + std::to_string(i) + ": " + ops->at(i)->describe(), code);
+            return KeeperException("Transaction failed at op #" + std::to_string(i) + ": " + ops.at(i)->describe(), code);
         }
         else
             return KeeperException(code);

dbms/src/Common/ZooKeeper/tests/CMakeLists.txt

@@ -14,4 +14,4 @@ add_executable(zkutil_zookeeper_holder zkutil_zookeeper_holder.cpp)
 target_link_libraries(zkutil_zookeeper_holder clickhouse_common_zookeeper)
 
 add_executable (zk_many_watches_reconnect zk_many_watches_reconnect.cpp)
-target_link_libraries (zk_many_watches_reconnect clickhouse_common_zookeeper clickhouse_common_configprocessor)
+target_link_libraries (zk_many_watches_reconnect clickhouse_common_zookeeper clickhouse_common_config)

dbms/src/Common/ZooKeeper/tests/zk_many_watches_reconnect.cpp

@@ -1,4 +1,4 @@
-#include <Common/ConfigProcessor/ConfigProcessor.h>
+#include <Common/Config/ConfigProcessor.h>
 #include <Common/ZooKeeper/ZooKeeper.h>
 #include <Poco/Event.h>
 #include <iostream>

dbms/src/Common/tests/CMakeLists.txt

@@ -68,3 +68,6 @@ target_link_libraries (allocator clickhouse_common_io)
 
 add_executable (cow_columns cow_columns.cpp)
 target_link_libraries (cow_columns clickhouse_common_io)
+
+add_executable (stopwatch stopwatch.cpp)
+target_link_libraries (stopwatch clickhouse_common_io)

dbms/src/Common/tests/parallel_aggregation.cpp

@@ -167,7 +167,7 @@ void aggregate33(Map & local_map, Map & global_map, Mutex & mutex, Source::const
 
         if (inserted && local_map.size() == threshold)
         {
-            Poco::ScopedLock<Mutex> lock(mutex);
+            std::lock_guard<Mutex> lock(mutex);
             for (auto & value_type : local_map)
                 global_map[value_type.first] += value_type.second;
 

dbms/src/Common/tests/stopwatch.cpp

@@ -0,0 +1,40 @@
+#include <vector>
+#include <thread>
+#include <iostream>
+#include <Common/Stopwatch.h>
+
+
+int main(int, char **)
+{
+    static constexpr size_t num_threads = 10;
+    static constexpr size_t num_iterations = 3;
+
+    std::vector<std::thread> threads(num_threads);
+
+    AtomicStopwatch watch;
+    Stopwatch total_watch;
+
+    for (size_t i = 0; i < num_threads; ++i)
+    {
+        threads[i] = std::thread([i, &watch, &total_watch]
+        {
+            size_t iteration = 0;
+            while (iteration < num_iterations)
+            {
+                if (auto lock = watch.compareAndRestartDeferred(1))
+                {
+                    std::cerr << "Thread " << i << ": begin iteration " << iteration << ", elapsed: " << total_watch.elapsedMilliseconds() << " ms.\n";
+                    std::this_thread::sleep_for(std::chrono::milliseconds(500));
+                    std::cerr << "Thread " << i << ": end iteration " << iteration << ", elapsed: " << total_watch.elapsedMilliseconds() << " ms.\n";
+                    ++iteration;
+                }
+                std::this_thread::sleep_for(std::chrono::milliseconds(500));
+            }
+        });
+    }
+
+    for (auto & thread : threads)
+        thread.join();
+
+    return 0;
+}

dbms/src/Core/Block.cpp

@@ -1,4 +1,5 @@
 #include <Common/Exception.h>
+#include <Common/FieldVisitors.h>
 
 #include <Core/Block.h>
 
@@ -6,6 +7,8 @@
 #include <IO/Operators.h>
 #include <Common/typeid_cast.h>
 
+#include <Columns/ColumnConst.h>
+
 #include <iterator>
 #include <memory>
 
@@ -18,6 +21,7 @@ namespace ErrorCodes
     extern const int POSITION_OUT_OF_BOUND;
     extern const int NOT_FOUND_COLUMN_IN_BLOCK;
     extern const int SIZES_OF_COLUMNS_DOESNT_MATCH;
+    extern const int BLOCKS_HAVE_DIFFERENT_STRUCTURE;
 }
 
 
@@ -276,13 +280,7 @@ std::string Block::dumpStructure() const
     {
         if (it != data.begin())
             out << ", ";
-
+        it->dumpStructure(out);
-        out << it->name << ' ' << it->type->getName();
-
-        if (it->column)
-            out << ' ' << it->column->dumpStructure();
-        else
-            out << " nullptr";
     }
     return out.str();
 }
@@ -379,22 +377,64 @@ Names Block::getNames() const
 }
 
 
-bool blocksHaveEqualStructure(const Block & lhs, const Block & rhs)
+template <typename ReturnType>
+static ReturnType checkBlockStructure(const Block & lhs, const Block & rhs, const std::string & context_description)
 {
-    size_t columns = lhs.columns();
+    auto on_error = [](const std::string & message [[maybe_unused]], int code [[maybe_unused]])
-    if (rhs.columns() != columns)
+    {
+        if constexpr (std::is_same_v<ReturnType, void>)
+            throw Exception(message, code);
+        else
             return false;
+    };
+
+    size_t columns = rhs.columns();
+    if (lhs.columns() != columns)
+        return on_error("Block structure mismatch in " + context_description + " stream: different number of columns:\n"
+            + lhs.dumpStructure() + "\n" + rhs.dumpStructure(), ErrorCodes::BLOCKS_HAVE_DIFFERENT_STRUCTURE);
 
     for (size_t i = 0; i < columns; ++i)
     {
-        const IDataType & lhs_type = *lhs.safeGetByPosition(i).type;
+        const auto & expected = rhs.getByPosition(i);
-        const IDataType & rhs_type = *rhs.safeGetByPosition(i).type;
+        const auto & actual = lhs.getByPosition(i);
 
-        if (!lhs_type.equals(rhs_type))
+        if (actual.name != expected.name)
-            return false;
+            return on_error("Block structure mismatch in " + context_description + " stream: different names of columns:\n"
+                + lhs.dumpStructure() + "\n" + rhs.dumpStructure(), ErrorCodes::BLOCKS_HAVE_DIFFERENT_STRUCTURE);
+
+        if (!actual.type->equals(*expected.type))
+            return on_error("Block structure mismatch in " + context_description + " stream: different types:\n"
+                + lhs.dumpStructure() + "\n" + rhs.dumpStructure(), ErrorCodes::BLOCKS_HAVE_DIFFERENT_STRUCTURE);
+
+        if (actual.column->getName() != expected.column->getName())
+            return on_error("Block structure mismatch in " + context_description + " stream: different columns:\n"
+                + lhs.dumpStructure() + "\n" + rhs.dumpStructure(), ErrorCodes::BLOCKS_HAVE_DIFFERENT_STRUCTURE);
+
+        if (actual.column->isColumnConst() && expected.column->isColumnConst())
+        {
+            Field actual_value = static_cast<const ColumnConst &>(*actual.column).getField();
+            Field expected_value = static_cast<const ColumnConst &>(*expected.column).getField();
+
+            if (actual_value != expected_value)
+                return on_error("Block structure mismatch in " + context_description + " stream: different values of constants, actual: "
+                    + applyVisitor(FieldVisitorToString(), actual_value) + ", expected: " + applyVisitor(FieldVisitorToString(), expected_value),
+                    ErrorCodes::BLOCKS_HAVE_DIFFERENT_STRUCTURE);
+        }
     }
 
-    return true;
+    return ReturnType(true);
+}
+
+
+bool blocksHaveEqualStructure(const Block & lhs, const Block & rhs)
+{
+    return checkBlockStructure<bool>(lhs, rhs, {});
+}
+
+
+void assertBlocksHaveEqualStructure(const Block & lhs, const Block & rhs, const std::string & context_description)
+{
+    checkBlockStructure<void>(lhs, rhs, context_description);
 }
 
 
@@ -453,12 +493,12 @@ void getBlocksDifference(const Block & lhs, const Block & rhs, std::string & out
 
     for (auto it = left_columns.rbegin(); it != left_columns.rend(); ++it)
     {
-        lhs_diff_writer << it->prettyPrint();
+        lhs_diff_writer << it->dumpStructure();
         lhs_diff_writer << ", position: " << lhs.getPositionByName(it->name) << '\n';
     }
     for (auto it = right_columns.rbegin(); it != right_columns.rend(); ++it)
     {
-        rhs_diff_writer << it->prettyPrint();
+        rhs_diff_writer << it->dumpStructure();
         rhs_diff_writer << ", position: " << rhs.getPositionByName(it->name) << '\n';
     }
 }

dbms/src/Core/Block.h

@@ -137,10 +137,13 @@ using Blocks = std::vector<Block>;
 using BlocksList = std::list<Block>;
 
 
-/// Compare column types for blocks. The order of the columns matters. Names do not matter.
+/// Compare number of columns, data types, column types, column names, and values of constant columns.
 bool blocksHaveEqualStructure(const Block & lhs, const Block & rhs);
 
-/// Calculate difference in structure of blocks and write description into output strings.
+/// Throw exception when blocks are different.
+void assertBlocksHaveEqualStructure(const Block & lhs, const Block & rhs, const std::string & context_description);
+
+/// Calculate difference in structure of blocks and write description into output strings. NOTE It doesn't compare values of constant columns.
 void getBlocksDifference(const Block & lhs, const Block & rhs, std::string & out_lhs_diff, std::string & out_rhs_diff);
 
 

dbms/src/Core/ColumnWithTypeAndName.cpp

@@ -1,6 +1,7 @@
 #include <Core/ColumnsWithTypeAndName.h>
 #include <IO/WriteBufferFromString.h>
 #include <IO/WriteHelpers.h>
+#include <IO/Operators.h>
 
 
 namespace DB
@@ -19,7 +20,7 @@ ColumnWithTypeAndName ColumnWithTypeAndName::cloneEmpty() const
 }
 
 
-bool ColumnWithTypeAndName::operator== (const ColumnWithTypeAndName & other) const
+bool ColumnWithTypeAndName::operator==(const ColumnWithTypeAndName & other) const
 {
     return name == other.name
         && ((!type && !other.type) || (type && other.type && type->equals(*other.type)))
@@ -27,20 +28,25 @@ bool ColumnWithTypeAndName::operator== (const ColumnWithTypeAndName & other) con
 }
 
 
-String ColumnWithTypeAndName::prettyPrint() const
+void ColumnWithTypeAndName::dumpStructure(WriteBuffer & out) const
+{
+    out << name;
+
+    if (type)
+        out << ' ' << type->getName();
+    else
+        out << " nullptr";
+
+    if (column)
+        out << ' ' << column->dumpStructure();
+    else
+        out << " nullptr";
+}
+
+String ColumnWithTypeAndName::dumpStructure() const
 {
     WriteBufferFromOwnString out;
-    writeString(name, out);
+    dumpStructure(out);
-    if (type)
-    {
-        writeChar(' ', out);
-        writeString(type->getName(), out);
-    }
-    if (column)
-    {
-        writeChar(' ', out);
-        writeString(column->getName(), out);
-    }
     return out.str();
 }
 

dbms/src/Core/ColumnWithTypeAndName.h

@@ -7,6 +7,9 @@
 namespace DB
 {
 
+class WriteBuffer;
+
+
 /** Column data along with its data type and name.
   * Column data could be nullptr - to represent just 'header' of column.
   * Name could be either name from a table or some temporary generated name during expression evaluation.
@@ -28,7 +31,9 @@ struct ColumnWithTypeAndName
 
     ColumnWithTypeAndName cloneEmpty() const;
     bool operator==(const ColumnWithTypeAndName & other) const;
-    String prettyPrint() const;
+
+    void dumpStructure(WriteBuffer & out) const;
+    String dumpStructure() const;
 };
 
 }

dbms/src/Core/iostream_debug_helpers.cpp

@@ -123,9 +123,7 @@ std::ostream & operator<<(std::ostream & stream, const SubqueryForSet & what)
 
 std::ostream & operator<<(std::ostream & stream, const IAST & what)
 {
-    stream << "IAST("
+    stream << "IAST{";
-           << "query_string = " << what.query_string
-           <<"){";
     what.dumpTree(stream);
     stream << "}";
     return stream;
@@ -135,10 +133,8 @@ std::ostream & operator<<(std::ostream & stream, const ExpressionAnalyzer & what
 {
     stream << "ExpressionAnalyzer{"
            << "hasAggregation=" << what.hasAggregation()
-           << ", RequiredColumns=" << what.getRequiredColumns()
            << ", SubqueriesForSet=" << what.getSubqueriesForSets()
            << ", ExternalTables=" << what.getExternalTables()
-           // TODO
            << "}";
     return stream;
 }

dbms/src/DataStreams/AddingDefaultBlockOutputStream.cpp

@@ -10,7 +10,7 @@
 namespace DB
 {
 
-void AddingDefaultBlockOutputStream::write(const DB::Block & block)
+void AddingDefaultBlockOutputStream::write(const Block & block)
 {
     Block res = block;
 
@@ -71,9 +71,6 @@ void AddingDefaultBlockOutputStream::write(const DB::Block & block)
     }
 
     /// Computes explicitly specified values (in column_defaults) by default.
-    /** @todo if somehow block does not contain values for implicitly-defaulted columns that are prerequisites
-         *    for explicitly-defaulted ones, exception will be thrown during evaluating such columns
-         *    (implicitly-defaulted columns are evaluated on the line after following one. */
     evaluateMissingDefaults(res, required_columns, column_defaults, context);
 
     output->write(res);

dbms/src/DataStreams/AddingDefaultBlockOutputStream.h

@@ -19,16 +19,18 @@ class AddingDefaultBlockOutputStream : public IBlockOutputStream
 public:
     AddingDefaultBlockOutputStream(
         const BlockOutputStreamPtr & output_,
+        const Block & header_,
         NamesAndTypesList required_columns_,
         const ColumnDefaults & column_defaults_,
         const Context & context_,
         bool only_explicit_column_defaults_)
-        : output(output_), required_columns(required_columns_),
+        : output(output_), header(header_), required_columns(required_columns_),
           column_defaults(column_defaults_), context(context_),
           only_explicit_column_defaults(only_explicit_column_defaults_)
     {
     }
 
+    Block getHeader() const override { return header; }
     void write(const Block & block) override;
 
     void flush() override;
@@ -38,6 +40,7 @@ public:
 
 private:
     BlockOutputStreamPtr output;
+    Block header;
     NamesAndTypesList required_columns;
     const ColumnDefaults column_defaults;
     const Context & context;

dbms/src/DataStreams/AggregatingBlockInputStream.cpp

@@ -76,7 +76,7 @@ Block AggregatingBlockInputStream::readImpl()
 
 
 AggregatingBlockInputStream::TemporaryFileStream::TemporaryFileStream(const std::string & path)
-    : file_in(path), compressed_in(file_in), block_in(std::make_shared<NativeBlockInputStream>(compressed_in, ClickHouseRevision::get())) {}
+    : file_in(path), compressed_in(file_in),
-
+    block_in(std::make_shared<NativeBlockInputStream>(compressed_in, ClickHouseRevision::get())) {}
 
 }

dbms/src/DataStreams/BlockIO.h

@@ -21,8 +21,6 @@ struct BlockIO
     BlockInputStreamPtr in;
     BlockOutputStreamPtr out;
 
-    Block out_sample;   /// Example of a block to be written to `out`.
-
     /// Callbacks for query logging could be set here.
     std::function<void(IBlockInputStream *, IBlockOutputStream *)>    finish_callback;
     std::function<void()>                                             exception_callback;
@@ -50,7 +48,6 @@ struct BlockIO
         process_list_entry      = rhs.process_list_entry;
         in                      = rhs.in;
         out                     = rhs.out;
-        out_sample              = rhs.out_sample;
 
         finish_callback         = rhs.finish_callback;
         exception_callback      = rhs.exception_callback;

dbms/src/DataStreams/BlockOutputStreamFromRowOutputStream.cpp

@@ -5,8 +5,8 @@
 namespace DB
 {
 
-BlockOutputStreamFromRowOutputStream::BlockOutputStreamFromRowOutputStream(RowOutputStreamPtr row_output_)
+BlockOutputStreamFromRowOutputStream::BlockOutputStreamFromRowOutputStream(RowOutputStreamPtr row_output_, const Block & header_)
-    : row_output(row_output_), first_row(true) {}
+    : row_output(row_output_), header(header_) {}
 
 
 void BlockOutputStreamFromRowOutputStream::write(const Block & block)

dbms/src/DataStreams/BlockOutputStreamFromRowOutputStream.h

@@ -13,7 +13,9 @@ namespace DB
 class BlockOutputStreamFromRowOutputStream : public IBlockOutputStream
 {
 public:
-    BlockOutputStreamFromRowOutputStream(RowOutputStreamPtr row_output_);
+    BlockOutputStreamFromRowOutputStream(RowOutputStreamPtr row_output_, const Block & header_);
+
+    Block getHeader() const override { return header; }
     void write(const Block & block) override;
     void writePrefix() override { row_output->writePrefix(); }
     void writeSuffix() override { row_output->writeSuffix(); }
@@ -29,7 +31,8 @@ public:
 
 private:
     RowOutputStreamPtr row_output;
-    bool first_row;
+    Block header;
+    bool first_row = true;
 };
 
 }

dbms/src/DataStreams/BlockStreamProfileInfo.cpp

@@ -77,11 +77,11 @@ void BlockStreamProfileInfo::collectInfosForStreamsWithName(const char * name, B
         return;
     }
 
-    for (const auto & child_stream : parent->getChildren())
+    parent->forEachProfilingChild([&] (IProfilingBlockInputStream & child)
     {
-        if (const auto * profiling_child = dynamic_cast<const IProfilingBlockInputStream *>(child_stream.get()))
+        child.getProfileInfo().collectInfosForStreamsWithName(name, res);
-            profiling_child->getProfileInfo().collectInfosForStreamsWithName(name, res);
+        return false;
-    }
+    });
 }
 
 
@@ -107,11 +107,11 @@ void BlockStreamProfileInfo::calculateRowsBeforeLimit() const
 
         for (const BlockStreamProfileInfo * info_limit_or_sort : limits_or_sortings)
         {
-            for (const auto & child_stream : info_limit_or_sort->parent->getChildren())
+            info_limit_or_sort->parent->forEachProfilingChild([&] (IProfilingBlockInputStream & child)
             {
-                if (const auto * profiling_child = dynamic_cast<const IProfilingBlockInputStream *>(child_stream.get()))
+                rows_before_limit += child.getProfileInfo().rows;
-                    rows_before_limit += profiling_child->getProfileInfo().rows;
+                return false;
-            }
+            });
         }
     }
     else

dbms/src/DataStreams/CastTypeBlockInputStream.cpp

@@ -1,75 +0,0 @@
-#include <DataStreams/CastTypeBlockInputStream.h>
-#include <Interpreters/castColumn.h>
-
-
-namespace DB
-{
-
-
-CastTypeBlockInputStream::CastTypeBlockInputStream(
-    const Context & context_,
-    const BlockInputStreamPtr & input_,
-    const Block & reference_definition_)
-    : context(context_), ref_definition(reference_definition_)
-{
-    children.emplace_back(input_);
-}
-
-String CastTypeBlockInputStream::getName() const
-{
-    return "CastType";
-}
-
-Block CastTypeBlockInputStream::readImpl()
-{
-    Block block = children.back()->read();
-
-    if (!block)
-        return block;
-
-    if (!initialized)
-    {
-        initialized = true;
-        initialize(block);
-    }
-
-    if (cast_description.empty())
-        return block;
-
-    size_t num_columns = block.columns();
-    Block res = block;
-
-    for (size_t col = 0; col < num_columns; ++col)
-    {
-        auto it = cast_description.find(col);
-        if (cast_description.end() != it)
-        {
-            auto & elem = res.getByPosition(col);
-            elem.column = castColumn(elem, it->second, context);
-            elem.type = it->second;
-        }
-    }
-
-    return res;
-}
-
-
-void CastTypeBlockInputStream::initialize(const Block & src_block)
-{
-    for (size_t src_col = 0, num_columns = src_block.columns(); src_col < num_columns; ++src_col)
-    {
-        const auto & src_column = src_block.getByPosition(src_col);
-
-        /// Skip, if it is a problem, it will be detected on the next pipeline stage
-        if (!ref_definition.has(src_column.name))
-            continue;
-
-        const auto & ref_column = ref_definition.getByName(src_column.name);
-
-        /// Force conversion if source and destination types is different.
-        if (!ref_column.type->equals(*src_column.type))
-            cast_description.emplace(src_col, ref_column.type);
-    }
-}
-
-}

dbms/src/DataStreams/CastTypeBlockInputStream.h

@@ -1,38 +0,0 @@
-#pragma once
-
-#include <unordered_map>
-#include <DataStreams/IProfilingBlockInputStream.h>
-
-
-namespace DB
-{
-
-/// Implicitly converts string and numeric values to Enum, numeric types to other numeric types.
-class CastTypeBlockInputStream : public IProfilingBlockInputStream
-{
-public:
-    CastTypeBlockInputStream(const Context & context,
-                             const BlockInputStreamPtr & input,
-                             const Block & reference_definition);
-
-    String getName() const override;
-
-    Block getHeader() const override { return ref_definition; }
-
-protected:
-    Block readImpl() override;
-
-private:
-    const Context & context;
-    Block ref_definition;
-
-    /// Initializes cast_description and prepares tmp_conversion_block
-    void initialize(const Block & src_block);
-    bool initialized = false;
-
-    /// Describes required conversions on source block
-    /// Contains column numbers in source block that should be converted
-    std::unordered_map<size_t, DataTypePtr> cast_description;
-};
-
-}

dbms/src/DataStreams/ConvertingBlockInputStream.cpp

@@ -0,0 +1,100 @@
+#include <DataStreams/ConvertingBlockInputStream.h>
+#include <Interpreters/castColumn.h>
+#include <Columns/ColumnConst.h>
+#include <Parsers/IAST.h>
+
+
+namespace DB
+{
+
+namespace ErrorCodes
+{
+    extern const int THERE_IS_NO_COLUMN;
+    extern const int BLOCKS_HAVE_DIFFERENT_STRUCTURE;
+    extern const int NUMBER_OF_COLUMNS_DOESNT_MATCH;
+}
+
+
+ConvertingBlockInputStream::ConvertingBlockInputStream(
+    const Context & context_,
+    const BlockInputStreamPtr & input,
+    const Block & result_header,
+    MatchColumnsMode mode)
+    : context(context_), header(result_header), conversion(header.columns())
+{
+    children.emplace_back(input);
+
+    Block input_header = input->getHeader();
+
+    size_t num_input_columns = input_header.columns();
+    size_t num_result_columns = result_header.columns();
+
+    if (mode == MatchColumnsMode::Position && num_input_columns != num_result_columns)
+        throw Exception("Number of columns doesn't match", ErrorCodes::NUMBER_OF_COLUMNS_DOESNT_MATCH);
+
+    for (size_t result_col_num = 0; result_col_num < num_result_columns; ++result_col_num)
+    {
+        const auto & res_elem = result_header.getByPosition(result_col_num);
+
+        switch (mode)
+        {
+            case MatchColumnsMode::Position:
+                conversion[result_col_num] = result_col_num;
+                break;
+
+            case MatchColumnsMode::Name:
+                if (input_header.has(res_elem.name))
+                    conversion[result_col_num] = input_header.getPositionByName(res_elem.name);
+                else
+                    throw Exception("Cannot find column " + backQuoteIfNeed(res_elem.name) + " in source stream",
+                        ErrorCodes::THERE_IS_NO_COLUMN);
+                break;
+        }
+
+        const auto & src_elem = input_header.getByPosition(conversion[result_col_num]);
+
+        /// Check constants.
+
+        if (res_elem.column->isColumnConst())
+        {
+            if (!src_elem.column->isColumnConst())
+                throw Exception("Cannot convert column " + backQuoteIfNeed(res_elem.name)
+                    + " because it is non constant in source stream but must be constant in result",
+                    ErrorCodes::BLOCKS_HAVE_DIFFERENT_STRUCTURE);
+            else if (static_cast<const ColumnConst &>(*src_elem.column).getField() != static_cast<const ColumnConst &>(*res_elem.column).getField())
+                throw Exception("Cannot convert column " + backQuoteIfNeed(res_elem.name)
+                    + " because it is constant but values of constants are different in source and result",
+                    ErrorCodes::BLOCKS_HAVE_DIFFERENT_STRUCTURE);
+        }
+
+        /// Check conversion by dry run CAST function.
+
+        castColumn(src_elem, res_elem.type, context);
+    }
+}
+
+
+Block ConvertingBlockInputStream::readImpl()
+{
+    Block src = children.back()->read();
+
+    if (!src)
+        return src;
+
+    Block res = header.cloneEmpty();
+    for (size_t res_pos = 0, size = conversion.size(); res_pos < size; ++res_pos)
+    {
+        const auto & src_elem = src.getByPosition(conversion[res_pos]);
+        auto & res_elem = res.getByPosition(res_pos);
+
+        ColumnPtr converted = castColumn(src_elem, res_elem.type, context);
+
+        if (src_elem.column->isColumnConst() && !res_elem.column->isColumnConst())
+            converted = converted->convertToFullColumnIfConst();
+
+        res_elem.column = std::move(converted);
+    }
+    return res;
+}
+
+}

dbms/src/DataStreams/ConvertingBlockInputStream.h

@@ -0,0 +1,54 @@
+#pragma once
+
+#include <unordered_map>
+#include <DataStreams/IProfilingBlockInputStream.h>
+
+
+namespace DB
+{
+
+/** Convert one block structure to another:
+  *
+  * Leaves only necessary columns;
+  *
+  * Columns are searched in source first by name;
+  *  and if there is no column with same name, then by position.
+  *
+  * Converting types of matching columns (with CAST function).
+  *
+  * Materializing columns which are const in source and non-const in result,
+  *  throw if they are const in result and non const in source,
+  *   or if they are const and have different values.
+  */
+class ConvertingBlockInputStream : public IProfilingBlockInputStream
+{
+public:
+    enum class MatchColumnsMode
+    {
+        /// Require same number of columns in source and result. Match columns by corresponding positions, regardless to names.
+        Position,
+        /// Find columns in source by their names. Allow excessive columns in source.
+        Name
+    };
+
+    ConvertingBlockInputStream(
+        const Context & context,
+        const BlockInputStreamPtr & input,
+        const Block & result_header,
+        MatchColumnsMode mode);
+
+    String getName() const override { return "Converting"; }
+    Block getHeader() const override { return header; }
+
+private:
+    Block readImpl() override;
+
+    const Context & context;
+    Block header;
+
+    /// How to construct result block. Position in source block, where to get each column.
+    using Conversion = std::vector<size_t>;
+    Conversion conversion;
+};
+
+}

dbms/src/DataStreams/CountingBlockOutputStream.h

@@ -12,7 +12,6 @@ namespace DB
 class CountingBlockOutputStream : public IBlockOutputStream
 {
 public:
-
     CountingBlockOutputStream(const BlockOutputStreamPtr & stream_)
         : stream(stream_) {}
 
@@ -31,6 +30,7 @@ public:
         return progress;
     }
 
+    Block getHeader() const override { return stream->getHeader(); }
     void write(const Block & block) override;
 
     void writePrefix() override                         { stream->writePrefix(); }
@@ -40,7 +40,6 @@ public:
     String getContentType() const override              { return stream->getContentType(); }
 
 protected:
-
     BlockOutputStreamPtr stream;
     Progress progress;
     ProgressCallback progress_callback;

dbms/src/DataStreams/CreatingSetsBlockInputStream.cpp

@@ -1,5 +1,6 @@
 #include <Interpreters/Set.h>
 #include <Interpreters/Join.h>
+#include <DataStreams/materializeBlock.h>
 #include <DataStreams/IBlockOutputStream.h>
 #include <DataStreams/CreatingSetsBlockInputStream.h>
 #include <Storages/IStorage.h>
@@ -34,7 +35,7 @@ void CreatingSetsBlockInputStream::readPrefixImpl()
 }
 
 
-const Block & CreatingSetsBlockInputStream::getTotals()
+Block CreatingSetsBlockInputStream::getTotals()
 {
     auto input = dynamic_cast<IProfilingBlockInputStream *>(children.back().get());
 
@@ -108,6 +109,7 @@ void CreatingSetsBlockInputStream::createOne(SubqueryForSet & subquery)
 
         if (!done_with_table)
         {
+            block = materializeBlock(block);
             table_out->write(block);
 
             rows_to_transfer += block.rows();
@@ -146,24 +148,20 @@ void CreatingSetsBlockInputStream::createOne(SubqueryForSet & subquery)
     if (table_out)
         table_out->writeSuffix();
 
-    /// We will display information about how many rows and bytes are read.
-    size_t rows = 0;
-    size_t bytes = 0;
-
     watch.stop();
 
-    subquery.source->getLeafRowsBytes(rows, bytes);
-
     size_t head_rows = 0;
     if (IProfilingBlockInputStream * profiling_in = dynamic_cast<IProfilingBlockInputStream *>(&*subquery.source))
     {
-        head_rows = profiling_in->getProfileInfo().rows;
+        const BlockStreamProfileInfo & profile_info = profiling_in->getProfileInfo();
+
+        head_rows = profile_info.rows;
 
         if (subquery.join)
             subquery.join->setTotals(profiling_in->getTotals());
     }
 
-    if (rows != 0)
+    if (head_rows != 0)
     {
         std::stringstream msg;
         msg << std::fixed << std::setprecision(3);
@@ -176,9 +174,7 @@ void CreatingSetsBlockInputStream::createOne(SubqueryForSet & subquery)
         if (subquery.table)
             msg << "Table with " << head_rows << " rows. ";
 
-        msg << "Read " << rows << " rows, " << bytes / 1048576.0 << " MiB in " << watch.elapsedSeconds() << " sec., "
+        msg << "In " << watch.elapsedSeconds() << " sec.";
-            << static_cast<size_t>(rows / watch.elapsedSeconds()) << " rows/sec., " << bytes / 1048576.0 / watch.elapsedSeconds() << " MiB/sec.";
-
         LOG_DEBUG(log, msg.rdbuf());
     }
     else

dbms/src/DataStreams/CreatingSetsBlockInputStream.h

@@ -38,7 +38,7 @@ public:
     Block getHeader() const override { return children.back()->getHeader(); }
 
     /// Takes `totals` only from the main source, not from subquery sources.
-    const Block & getTotals() override;
+    Block getTotals() override;
 
 protected:
     Block readImpl() override;

dbms/src/DataStreams/ExpressionBlockInputStream.cpp

@@ -13,7 +13,7 @@ ExpressionBlockInputStream::ExpressionBlockInputStream(const BlockInputStreamPtr
 
 String ExpressionBlockInputStream::getName() const { return "Expression"; }
 
-const Block & ExpressionBlockInputStream::getTotals()
+Block ExpressionBlockInputStream::getTotals()
 {
     if (IProfilingBlockInputStream * child = dynamic_cast<IProfilingBlockInputStream *>(&*children.back()))
     {

dbms/src/DataStreams/ExpressionBlockInputStream.h

@@ -22,7 +22,7 @@ public:
     ExpressionBlockInputStream(const BlockInputStreamPtr & input, const ExpressionActionsPtr & expression_);
 
     String getName() const override;
-    const Block & getTotals() override;
+    Block getTotals() override;
     Block getHeader() const override;
 
 protected:

dbms/src/DataStreams/FilterBlockInputStream.cpp

@@ -53,7 +53,7 @@ FilterBlockInputStream::FilterBlockInputStream(const BlockInputStreamPtr & input
 String FilterBlockInputStream::getName() const { return "Filter"; }
 
 
-const Block & FilterBlockInputStream::getTotals()
+Block FilterBlockInputStream::getTotals()
 {
     if (IProfilingBlockInputStream * child = dynamic_cast<IProfilingBlockInputStream *>(&*children.back()))
     {

dbms/src/DataStreams/FilterBlockInputStream.h

@@ -25,7 +25,7 @@ public:
     FilterBlockInputStream(const BlockInputStreamPtr & input, const ExpressionActionsPtr & expression_, const String & filter_column_name_);
 
     String getName() const override;
-    const Block & getTotals() override;
+    Block getTotals() override;
     Block getHeader() const override;
 
 protected:

dbms/src/DataStreams/FilterColumnsBlockInputStream.h

@@ -21,7 +21,7 @@ public:
 
     String getName() const override
     {
-        return "FilterColumnsBlockInputStream";
+        return "FilterColumns";
     }
 
     Block getHeader() const override;

dbms/src/DataStreams/FormatFactory.cpp

@@ -141,66 +141,66 @@ static BlockOutputStreamPtr getOutputImpl(const String & name, WriteBuffer & buf
     FormatSettingsJSON json_settings(settings.output_format_json_quote_64bit_integers, settings.output_format_json_quote_denormals);
 
     if (name == "Native")
-        return std::make_shared<NativeBlockOutputStream>(buf);
+        return std::make_shared<NativeBlockOutputStream>(buf, 0, sample);
     else if (name == "RowBinary")
-        return std::make_shared<BlockOutputStreamFromRowOutputStream>(std::make_shared<BinaryRowOutputStream>(buf));
+        return std::make_shared<BlockOutputStreamFromRowOutputStream>(std::make_shared<BinaryRowOutputStream>(buf), sample);
     else if (name == "TabSeparated" || name == "TSV")
-        return std::make_shared<BlockOutputStreamFromRowOutputStream>(std::make_shared<TabSeparatedRowOutputStream>(buf, sample));
+        return std::make_shared<BlockOutputStreamFromRowOutputStream>(std::make_shared<TabSeparatedRowOutputStream>(buf, sample), sample);
     else if (name == "TabSeparatedWithNames" || name == "TSVWithNames")
-        return std::make_shared<BlockOutputStreamFromRowOutputStream>(std::make_shared<TabSeparatedRowOutputStream>(buf, sample, true));
+        return std::make_shared<BlockOutputStreamFromRowOutputStream>(std::make_shared<TabSeparatedRowOutputStream>(buf, sample, true), sample);
     else if (name == "TabSeparatedWithNamesAndTypes" || name == "TSVWithNamesAndTypes")
-        return std::make_shared<BlockOutputStreamFromRowOutputStream>(std::make_shared<TabSeparatedRowOutputStream>(buf, sample, true, true));
+        return std::make_shared<BlockOutputStreamFromRowOutputStream>(std::make_shared<TabSeparatedRowOutputStream>(buf, sample, true, true), sample);
     else if (name == "TabSeparatedRaw" || name == "TSVRaw")
-        return std::make_shared<BlockOutputStreamFromRowOutputStream>(std::make_shared<TabSeparatedRawRowOutputStream>(buf, sample));
+        return std::make_shared<BlockOutputStreamFromRowOutputStream>(std::make_shared<TabSeparatedRawRowOutputStream>(buf, sample), sample);
     else if (name == "CSV")
-        return std::make_shared<BlockOutputStreamFromRowOutputStream>(std::make_shared<CSVRowOutputStream>(buf, sample));
+        return std::make_shared<BlockOutputStreamFromRowOutputStream>(std::make_shared<CSVRowOutputStream>(buf, sample), sample);
     else if (name == "CSVWithNames")
-        return std::make_shared<BlockOutputStreamFromRowOutputStream>(std::make_shared<CSVRowOutputStream>(buf, sample, true));
+        return std::make_shared<BlockOutputStreamFromRowOutputStream>(std::make_shared<CSVRowOutputStream>(buf, sample, true), sample);
     else if (name == "Pretty")
-        return std::make_shared<PrettyBlockOutputStream>(buf, false, settings.output_format_pretty_max_rows, context);
+        return std::make_shared<PrettyBlockOutputStream>(buf, sample, false, settings.output_format_pretty_max_rows, context);
     else if (name == "PrettyCompact")
-        return std::make_shared<PrettyCompactBlockOutputStream>(buf, false, settings.output_format_pretty_max_rows, context);
+        return std::make_shared<PrettyCompactBlockOutputStream>(buf, sample, false, settings.output_format_pretty_max_rows, context);
     else if (name == "PrettyCompactMonoBlock")
     {
-        BlockOutputStreamPtr dst = std::make_shared<PrettyCompactBlockOutputStream>(buf, false, settings.output_format_pretty_max_rows, context);
+        BlockOutputStreamPtr dst = std::make_shared<PrettyCompactBlockOutputStream>(buf, sample, false, settings.output_format_pretty_max_rows, context);
         auto res = std::make_shared<SquashingBlockOutputStream>(dst, settings.output_format_pretty_max_rows, 0);
         res->disableFlush();
         return res;
     }
     else if (name == "PrettySpace")
-        return std::make_shared<PrettySpaceBlockOutputStream>(buf, false, settings.output_format_pretty_max_rows, context);
+        return std::make_shared<PrettySpaceBlockOutputStream>(buf, sample, false, settings.output_format_pretty_max_rows, context);
     else if (name == "PrettyNoEscapes")
-        return std::make_shared<PrettyBlockOutputStream>(buf, true, settings.output_format_pretty_max_rows, context);
+        return std::make_shared<PrettyBlockOutputStream>(buf, sample, true, settings.output_format_pretty_max_rows, context);
     else if (name == "PrettyCompactNoEscapes")
-        return std::make_shared<PrettyCompactBlockOutputStream>(buf, true, settings.output_format_pretty_max_rows, context);
+        return std::make_shared<PrettyCompactBlockOutputStream>(buf, sample, true, settings.output_format_pretty_max_rows, context);
     else if (name == "PrettySpaceNoEscapes")
-        return std::make_shared<PrettySpaceBlockOutputStream>(buf, true, settings.output_format_pretty_max_rows, context);
+        return std::make_shared<PrettySpaceBlockOutputStream>(buf, sample, true, settings.output_format_pretty_max_rows, context);
     else if (name == "Vertical")
         return std::make_shared<BlockOutputStreamFromRowOutputStream>(std::make_shared<VerticalRowOutputStream>(
-            buf, sample, settings.output_format_pretty_max_rows));
+            buf, sample, settings.output_format_pretty_max_rows), sample);
     else if (name == "VerticalRaw")
         return std::make_shared<BlockOutputStreamFromRowOutputStream>(std::make_shared<VerticalRawRowOutputStream>(
-            buf, sample, settings.output_format_pretty_max_rows));
+            buf, sample, settings.output_format_pretty_max_rows), sample);
     else if (name == "Values")
-        return std::make_shared<BlockOutputStreamFromRowOutputStream>(std::make_shared<ValuesRowOutputStream>(buf));
+        return std::make_shared<BlockOutputStreamFromRowOutputStream>(std::make_shared<ValuesRowOutputStream>(buf), sample);
     else if (name == "JSON")
         return std::make_shared<BlockOutputStreamFromRowOutputStream>(std::make_shared<JSONRowOutputStream>(
-            buf, sample, settings.output_format_write_statistics, json_settings));
+            buf, sample, settings.output_format_write_statistics, json_settings), sample);
     else if (name == "JSONCompact")
         return std::make_shared<BlockOutputStreamFromRowOutputStream>(std::make_shared<JSONCompactRowOutputStream>(
-            buf, sample, settings.output_format_write_statistics, json_settings));
+            buf, sample, settings.output_format_write_statistics, json_settings), sample);
     else if (name == "JSONEachRow")
         return std::make_shared<BlockOutputStreamFromRowOutputStream>(std::make_shared<JSONEachRowRowOutputStream>(
-            buf, sample, json_settings));
+            buf, sample, json_settings), sample);
     else if (name == "XML")
         return std::make_shared<BlockOutputStreamFromRowOutputStream>(std::make_shared<XMLRowOutputStream>(buf, sample,
-            settings.output_format_write_statistics));
+            settings.output_format_write_statistics), sample);
     else if (name == "TSKV")
-        return std::make_shared<BlockOutputStreamFromRowOutputStream>(std::make_shared<TSKVRowOutputStream>(buf, sample));
+        return std::make_shared<BlockOutputStreamFromRowOutputStream>(std::make_shared<TSKVRowOutputStream>(buf, sample), sample);
     else if (name == "ODBCDriver")
         return std::make_shared<ODBCDriverBlockOutputStream>(buf, sample);
     else if (name == "Null")
-        return std::make_shared<NullBlockOutputStream>();
+        return std::make_shared<NullBlockOutputStream>(sample);
     else
         throw Exception("Unknown format " + name, ErrorCodes::UNKNOWN_FORMAT);
 }
@@ -211,7 +211,7 @@ BlockOutputStreamPtr FormatFactory::getOutput(const String & name, WriteBuffer &
     /** Materialization is needed, because formats can use the functions `IDataType`,
       *  which only work with full columns.
       */
-    return std::make_shared<MaterializingBlockOutputStream>(getOutputImpl(name, buf, sample, context));
+    return std::make_shared<MaterializingBlockOutputStream>(getOutputImpl(name, buf, materializeBlock(sample), context), sample);
 }
 
 }

dbms/src/DataStreams/IBlockInputStream.cpp

@@ -13,6 +13,10 @@ namespace ErrorCodes
 }
 
 
+/** It's safe to access children without mutex as long as these methods are called before first call to read, readPrefix.
+  */
+
+
 String IBlockInputStream::getTreeID() const
 {
     std::stringstream s;
@@ -64,7 +68,7 @@ void IBlockInputStream::dumpTree(std::ostream & ostr, size_t indent, size_t mult
     ostr << String(indent, ' ') << getName();
     if (multiplier > 1)
         ostr << " × " << multiplier;
-    // ostr << ": " << getHeader().dumpStructure();
+    //ostr << ": " << getHeader().dumpStructure();
     ostr << std::endl;
     ++indent;
 
@@ -87,44 +91,5 @@ void IBlockInputStream::dumpTree(std::ostream & ostr, size_t indent, size_t mult
     }
 }
 
-
-BlockInputStreams IBlockInputStream::getLeaves()
-{
-    BlockInputStreams res;
-    getLeavesImpl(res, nullptr);
-    return res;
-}
-
-
-void IBlockInputStream::getLeafRowsBytes(size_t & rows, size_t & bytes)
-{
-    BlockInputStreams leaves = getLeaves();
-    rows = 0;
-    bytes = 0;
-
-    for (BlockInputStreams::const_iterator it = leaves.begin(); it != leaves.end(); ++it)
-    {
-        if (const IProfilingBlockInputStream * profiling = dynamic_cast<const IProfilingBlockInputStream *>(&**it))
-        {
-            const BlockStreamProfileInfo & info = profiling->getProfileInfo();
-            rows += info.rows;
-            bytes += info.bytes;
-        }
-    }
-}
-
-
-void IBlockInputStream::getLeavesImpl(BlockInputStreams & res, const BlockInputStreamPtr & this_shared_ptr)
-{
-    if (children.empty())
-    {
-        if (this_shared_ptr)
-            res.push_back(this_shared_ptr);
-    }
-    else
-        for (BlockInputStreams::iterator it = children.begin(); it != children.end(); ++it)
-            (*it)->getLeavesImpl(res, *it);
-}
-
 }
 

dbms/src/DataStreams/IBlockInputStream.h

@@ -2,6 +2,7 @@
 
 #include <vector>
 #include <memory>
+#include <mutex>
 #include <functional>
 #include <boost/noncopyable.hpp>
 #include <Core/Block.h>
@@ -89,18 +90,13 @@ public:
     /// In case of isGroupedOutput or isSortedOutput, return corresponding SortDescription
     virtual const SortDescription & getSortDescription() const { throw Exception("Output of " + getName() + " is not sorted", ErrorCodes::OUTPUT_IS_NOT_SORTED); }
 
-    BlockInputStreams & getChildren() { return children; }
+    /** Must be called before read, readPrefix.
-
+      */
     void dumpTree(std::ostream & ostr, size_t indent = 0, size_t multiplier = 1);
 
-    /// Get leaf sources (not including this one).
-    BlockInputStreams getLeaves();
-
-    /// Get the number of rows and bytes read in the leaf sources.
-    void getLeafRowsBytes(size_t & rows, size_t & bytes);
-
     /** Check the depth of the pipeline.
       * If max_depth is specified and the `depth` is greater - throw an exception.
+      * Must be called before read, readPrefix.
       */
     size_t checkDepth(size_t max_depth) const;
 
@@ -108,19 +104,26 @@ public:
       */
     void addTableLock(const TableStructureReadLockPtr & lock) { table_locks.push_back(lock); }
 
-protected:
-    TableStructureReadLocks table_locks;
 
+    template <typename F>
+    void forEachChild(F && f)
+    {
+        std::lock_guard lock(children_mutex);
+        for (auto & child : children)
+            if (f(*child))
+                return;
+    }
+
+protected:
     BlockInputStreams children;
+    std::mutex children_mutex;
 
 private:
-    void getLeavesImpl(BlockInputStreams & res, const BlockInputStreamPtr & this_shared_ptr);
+    TableStructureReadLocks table_locks;
 
     size_t checkDepthImpl(size_t max_depth, size_t level) const;
 
-    /** Get text that identifies this source and the entire subtree.
+    /// Get text with names of this source and the entire subtree.
-      * Unlike getID - without taking into account the parameters.
-      */
     String getTreeID() const;
 };
 

dbms/src/DataStreams/IBlockOutputStream.h

@@ -4,12 +4,12 @@
 #include <vector>
 #include <memory>
 #include <boost/noncopyable.hpp>
+#include <Core/Block.h>
 
 
 namespace DB
 {
 
-class Block;
 struct Progress;
 
 class TableStructureReadLock;
@@ -26,6 +26,12 @@ class IBlockOutputStream : private boost::noncopyable
 public:
     IBlockOutputStream() {}
 
+    /** Get data structure of the stream in a form of "header" block (it is also called "sample block").
+      * Header block contains column names, data types, columns of size 0. Constant columns must have corresponding values.
+      * You must pass blocks of exactly this structure to the 'write' method.
+      */
+    virtual Block getHeader() const = 0;
+
     /** Write block.
       */
     virtual void write(const Block & block) = 0;
@@ -60,7 +66,7 @@ public:
       */
     void addTableLock(const TableStructureReadLockPtr & lock) { table_locks.push_back(lock); }
 
-protected:
+private:
     TableStructureReadLocks table_locks;
 };
 

dbms/src/DataStreams/IProfilingBlockInputStream.cpp

@@ -5,6 +5,7 @@
 #include <Interpreters/ProcessList.h>
 #include <DataStreams/IProfilingBlockInputStream.h>
 
+
 namespace DB
 {
 
@@ -15,6 +16,7 @@ namespace ErrorCodes
     extern const int TIMEOUT_EXCEEDED;
     extern const int TOO_SLOW;
     extern const int LOGICAL_ERROR;
+    extern const int BLOCKS_HAVE_DIFFERENT_STRUCTURE;
 }
 
 
@@ -25,7 +27,11 @@ IProfilingBlockInputStream::IProfilingBlockInputStream()
 
 Block IProfilingBlockInputStream::read()
 {
-    collectAndSendTotalRowsApprox();
+    if (total_rows_approx)
+    {
+        progressImpl(Progress(0, 0, total_rows_approx));
+        total_rows_approx = 0;
+    }
 
     if (!info.started)
     {
@@ -62,7 +68,7 @@ Block IProfilingBlockInputStream::read()
         /** If the thread is over, then we will ask all children to abort the execution.
           * This makes sense when running a query with LIMIT
           * - there is a situation when all the necessary data has already been read,
-          *   but `children sources are still working,
+          *   but children sources are still working,
           *   herewith they can work in separate threads or even remotely.
           */
         cancel();
@@ -70,6 +76,15 @@ Block IProfilingBlockInputStream::read()
 
     progress(Progress(res.rows(), res.bytes()));
 
+#ifndef NDEBUG
+    if (res)
+    {
+        Block header = getHeader();
+        if (header)
+            assertBlocksHaveEqualStructure(res, header, getName());
+    }
+#endif
+
     return res;
 }
 
@@ -78,15 +93,21 @@ void IProfilingBlockInputStream::readPrefix()
 {
     readPrefixImpl();
 
-    for (auto & child : children)
+    forEachChild([&] (IBlockInputStream & child)
-        child->readPrefix();
+    {
+        child.readPrefix();
+        return false;
+    });
 }
 
 
 void IProfilingBlockInputStream::readSuffix()
 {
-    for (auto & child : children)
+    forEachChild([&] (IBlockInputStream & child)
-        child->readSuffix();
+    {
+        child.readSuffix();
+        return false;
+    });
 
     readSuffixImpl();
 }
@@ -335,9 +356,11 @@ void IProfilingBlockInputStream::cancel()
     if (!is_cancelled.compare_exchange_strong(old_val, true, std::memory_order_seq_cst, std::memory_order_relaxed))
         return;
 
-    for (auto & child : children)
+    forEachProfilingChild([] (IProfilingBlockInputStream & child)
-        if (IProfilingBlockInputStream * p_child = dynamic_cast<IProfilingBlockInputStream *>(&*child))
+    {
-            p_child->cancel();
+        child.cancel();
+        return false;
+    });
 }
 
 
@@ -345,9 +368,11 @@ void IProfilingBlockInputStream::setProgressCallback(const ProgressCallback & ca
 {
     progress_callback = callback;
 
-    for (auto & child : children)
+    forEachProfilingChild([&] (IProfilingBlockInputStream & child)
-        if (IProfilingBlockInputStream * p_child = dynamic_cast<IProfilingBlockInputStream *>(&*child))
+    {
-            p_child->setProgressCallback(callback);
+        child.setProgressCallback(callback);
+        return false;
+    });
 }
 
 
@@ -355,71 +380,44 @@ void IProfilingBlockInputStream::setProcessListElement(ProcessListElement * elem
 {
     process_list_elem = elem;
 
-    for (auto & child : children)
+    forEachProfilingChild([&] (IProfilingBlockInputStream & child)
-        if (IProfilingBlockInputStream * p_child = dynamic_cast<IProfilingBlockInputStream *>(&*child))
+    {
-            p_child->setProcessListElement(elem);
+        child.setProcessListElement(elem);
+        return false;
+    });
 }
 
 
-const Block & IProfilingBlockInputStream::getTotals()
+Block IProfilingBlockInputStream::getTotals()
 {
     if (totals)
         return totals;
 
-    for (auto & child : children)
+    Block res;
+    forEachProfilingChild([&] (IProfilingBlockInputStream & child)
     {
-        if (IProfilingBlockInputStream * p_child = dynamic_cast<IProfilingBlockInputStream *>(&*child))
+        res = child.getTotals();
-        {
-            const Block & res = p_child->getTotals();
         if (res)
+            return true;
+        return false;
+    });
     return res;
-        }
-    }
-
-    return totals;
 }
 
-const Block & IProfilingBlockInputStream::getExtremes() const
+Block IProfilingBlockInputStream::getExtremes()
 {
     if (extremes)
         return extremes;
 
-    for (const auto & child : children)
+    Block res;
+    forEachProfilingChild([&] (IProfilingBlockInputStream & child)
     {
-        if (const IProfilingBlockInputStream * p_child = dynamic_cast<const IProfilingBlockInputStream *>(&*child))
+        res = child.getExtremes();
-        {
-            const Block & res = p_child->getExtremes();
         if (res)
+            return true;
+        return false;
+    });
     return res;
-        }
-    }
-
-    return extremes;
-}
-
-void IProfilingBlockInputStream::collectTotalRowsApprox()
-{
-    bool old_val = false;
-    if (!collected_total_rows_approx.compare_exchange_strong(old_val, true))
-        return;
-
-    for (auto & child : children)
-    {
-        if (IProfilingBlockInputStream * p_child = dynamic_cast<IProfilingBlockInputStream *>(&*child))
-        {
-            p_child->collectTotalRowsApprox();
-            total_rows_approx += p_child->total_rows_approx;
-        }
-    }
-}
-
-void IProfilingBlockInputStream::collectAndSendTotalRowsApprox()
-{
-    if (collected_total_rows_approx)
-        return;
-
-    collectTotalRowsApprox();
-    progressImpl(Progress(0, 0, total_rows_approx));
 }
 
 }

dbms/src/DataStreams/IProfilingBlockInputStream.h

@@ -26,6 +26,8 @@ using ProfilingBlockInputStreamPtr = std::shared_ptr<IProfilingBlockInputStream>
   */
 class IProfilingBlockInputStream : public IBlockInputStream
 {
+    friend struct BlockStreamProfileInfo;
+
 public:
     IProfilingBlockInputStream();
 
@@ -56,10 +58,10 @@ public:
       * Call this method only after all the data has been retrieved with `read`,
       *  otherwise there will be problems if any data at the same time is computed in another thread.
       */
-    virtual const Block & getTotals();
+    virtual Block getTotals();
 
     /// The same for minimums and maximums.
-    const Block & getExtremes() const;
+    Block getExtremes();
 
 
     /** Set the execution progress bar callback.
@@ -98,7 +100,7 @@ public:
 
     /** Set the approximate total number of rows to read.
       */
-    void setTotalRowsApprox(size_t value) { total_rows_approx = value; }
+    void addTotalRowsApprox(size_t value) { total_rows_approx += value; }
 
 
     /** Ask to abort the receipt of data as soon as possible.
@@ -180,15 +182,17 @@ protected:
     Block totals;
     /// Minimums and maximums. The first row of the block - minimums, the second - the maximums.
     Block extremes;
-    /// The approximate total number of rows to read. For progress bar.
+
-    size_t total_rows_approx = 0;
+
+    void addChild(BlockInputStreamPtr & child)
+    {
+        std::lock_guard lock(children_mutex);
+        children.push_back(child);
+    }
 
 private:
     bool enabled_extremes = false;
 
-    /// Information about the approximate total number of rows is collected in the parent source.
-    std::atomic_bool collected_total_rows_approx {false};
-
     /// The limit on the number of rows/bytes has been exceeded, and you need to stop execution on the next `read` call, as if the thread has run out.
     bool limit_exceeded_need_break = false;
 
@@ -199,6 +203,9 @@ private:
     QuotaForIntervals * quota = nullptr;    /// If nullptr - the quota is not used.
     double prev_elapsed = 0;
 
+    /// The approximate total number of rows to read. For progress bar.
+    size_t total_rows_approx = 0;
+
     /// The successors must implement this function.
     virtual Block readImpl() = 0;
 
@@ -217,13 +224,16 @@ private:
     bool checkTimeLimits();
     void checkQuota(Block & block);
 
-    /// Gather information about the approximate total number of rows from all children.
-    void collectTotalRowsApprox();
 
-    /** Send information about the approximate total number of rows to the progress bar.
+    template <typename F>
-      * It is done so that sending occurs only in the upper stream.
+    void forEachProfilingChild(F && f)
-      */
+    {
-    void collectAndSendTotalRowsApprox();
+        std::lock_guard lock(children_mutex);
+        for (auto & child : children)
+            if (IProfilingBlockInputStream * p_child = dynamic_cast<IProfilingBlockInputStream *>(child.get()))
+                if (f(*p_child))
+                    return;
+    }
 };
 
 }

dbms/src/DataStreams/InputStreamFromASTInsertQuery.cpp

@@ -43,7 +43,7 @@ InputStreamFromASTInsertQuery::InputStreamFromASTInsertQuery(
 
     input_buffer_contacenated = std::make_unique<ConcatReadBuffer>(buffers);
 
-    res_stream = context.getInputFormat(format, *input_buffer_contacenated, streams.out_sample, context.getSettings().max_insert_block_size);
+    res_stream = context.getInputFormat(format, *input_buffer_contacenated, streams.out->getHeader(), context.getSettings().max_insert_block_size);
 }
 
 }

dbms/src/DataStreams/LazyBlockInputStream.h

@@ -27,12 +27,6 @@ public:
 
     String getName() const override { return name; }
 
-    void cancel() override
-    {
-        std::lock_guard<std::mutex> lock(cancel_mutex);
-        IProfilingBlockInputStream::cancel();
-    }
-
     Block getHeader() const override
     {
         return header;
@@ -62,26 +56,7 @@ protected:
             input->readPrefix();
 
             {
-                std::lock_guard<std::mutex> lock(cancel_mutex);
+                addChild(input);
-
-                /** TODO Data race here. See IProfilingBlockInputStream::collectAndSendTotalRowsApprox.
-                    Assume following pipeline:
-
-                    RemoteBlockInputStream
-                     AsynchronousBlockInputStream
-                      LazyBlockInputStream
-
-                    RemoteBlockInputStream calls AsynchronousBlockInputStream::readPrefix
-                     and AsynchronousBlockInputStream spawns a thread and returns.
-
-                    The separate thread will call LazyBlockInputStream::read
-                     LazyBlockInputStream::read will add more children to itself
-
-                    In the same moment, in main thread, RemoteBlockInputStream::read is called,
-                     then IProfilingBlockInputStream::collectAndSendTotalRowsApprox is called
-                     and iterates over set of children.
-                  */
-                children.push_back(input);
 
                 if (isCancelled() && p_input)
                     p_input->cancel();
@@ -97,8 +72,6 @@ private:
     Generator generator;
 
     BlockInputStreamPtr input;
-
-    std::mutex cancel_mutex;
 };
 
 }

dbms/src/DataStreams/MaterializingBlockOutputStream.h

@@ -12,9 +12,10 @@ namespace DB
 class MaterializingBlockOutputStream : public IBlockOutputStream
 {
 public:
-    MaterializingBlockOutputStream(const BlockOutputStreamPtr & output)
+    MaterializingBlockOutputStream(const BlockOutputStreamPtr & output, const Block & header)
-        : output{output} {}
+        : output{output}, header(header) {}
 
+    Block getHeader() const                           override { return header; }
     void write(const Block & block)                   override { output->write(materializeBlock(block)); }
     void flush()                                      override { output->flush(); }
     void writePrefix()                                override { output->writePrefix(); }
@@ -27,6 +28,7 @@ public:
 
 private:
     BlockOutputStreamPtr output;
+    Block header;
 };
 
 }

dbms/src/DataStreams/MergeSortingBlockInputStream.cpp

@@ -34,29 +34,29 @@ static void removeConstantsFromBlock(Block & block)
     }
 }
 
-static void removeConstantsFromSortDescription(const Block & sample_block, SortDescription & description)
+static void removeConstantsFromSortDescription(const Block & header, SortDescription & description)
 {
     description.erase(std::remove_if(description.begin(), description.end(),
         [&](const SortColumnDescription & elem)
         {
             if (!elem.column_name.empty())
-                return sample_block.getByName(elem.column_name).column->isColumnConst();
+                return header.getByName(elem.column_name).column->isColumnConst();
             else
-                return sample_block.safeGetByPosition(elem.column_number).column->isColumnConst();
+                return header.safeGetByPosition(elem.column_number).column->isColumnConst();
         }), description.end());
 }
 
 /** Add into block, whose constant columns was removed by previous function,
-  *  constant columns from sample_block (which must have structure as before removal of constants from block).
+  *  constant columns from header (which must have structure as before removal of constants from block).
   */
-static void enrichBlockWithConstants(Block & block, const Block & sample_block)
+static void enrichBlockWithConstants(Block & block, const Block & header)
 {
     size_t rows = block.rows();
-    size_t columns = sample_block.columns();
+    size_t columns = header.columns();
 
     for (size_t i = 0; i < columns; ++i)
     {
-        const auto & col_type_name = sample_block.getByPosition(i);
+        const auto & col_type_name = header.getByPosition(i);
         if (col_type_name.column->isColumnConst())
             block.insert(i, {col_type_name.column->cloneResized(rows), col_type_name.type, col_type_name.name});
     }
@@ -65,6 +65,12 @@ static void enrichBlockWithConstants(Block & block, const Block & sample_block)
 
 Block MergeSortingBlockInputStream::readImpl()
 {
+    if (!header)
+    {
+        header = getHeader();
+        removeConstantsFromSortDescription(header, description);
+    }
+
     /** Algorithm:
       * - read to memory blocks from source stream;
       * - if too much of them and if external sorting is enabled,
@@ -77,12 +83,6 @@ Block MergeSortingBlockInputStream::readImpl()
     {
         while (Block block = children.back()->read())
         {
-            if (!sample_block)
-            {
-                sample_block = block.cloneEmpty();
-                removeConstantsFromSortDescription(sample_block, description);
-            }
-
             /// If there were only const columns in sort description, then there is no need to sort.
             /// Return the blocks as is.
             if (description.empty())
@@ -103,7 +103,7 @@ Block MergeSortingBlockInputStream::readImpl()
                 const std::string & path = temporary_files.back()->path();
                 WriteBufferFromFile file_buf(path);
                 CompressedWriteBuffer compressed_buf(file_buf);
-                NativeBlockOutputStream block_out(compressed_buf);
+                NativeBlockOutputStream block_out(compressed_buf, 0, block.cloneEmpty());
                 MergeSortingBlocksBlockInputStream block_in(blocks, description, max_merged_block_size, limit);
 
                 LOG_INFO(log, "Sorting and writing part of data into temporary file " + path);
@@ -148,7 +148,7 @@ Block MergeSortingBlockInputStream::readImpl()
 
     Block res = impl->read();
     if (res)
-        enrichBlockWithConstants(res, sample_block);
+        enrichBlockWithConstants(res, header);
     return res;
 }
 

dbms/src/DataStreams/MergeSortingBlockInputStream.h

@@ -108,7 +108,7 @@ private:
     /// Before operation, will remove constant columns from blocks. And after, place constant columns back.
     /// (to avoid excessive virtual function calls and because constants cannot be serialized in Native format for temporary files)
     /// Save original block structure here.
-    Block sample_block;
+    Block header;
 
     /// Everything below is for external sorting.
     std::vector<std::unique_ptr<Poco::TemporaryFile>> temporary_files;

dbms/src/DataStreams/MergingAggregatedMemoryEfficientBlockInputStream.cpp

@@ -493,7 +493,7 @@ MergingAggregatedMemoryEfficientBlockInputStream::BlocksToMerge MergingAggregate
 
     while (true)
     {
-        if (current_bucket_num == NUM_BUCKETS)
+        if (current_bucket_num >= NUM_BUCKETS)
         {
             /// All ordinary data was processed. Maybe, there are also 'overflows'-blocks.
 //            std::cerr << "at end\n";

dbms/src/DataStreams/MergingAggregatedMemoryEfficientBlockInputStream.h

@@ -84,7 +84,7 @@ protected:
     Block readImpl() override;
 
 private:
-    static constexpr size_t NUM_BUCKETS = 256;
+    static constexpr int NUM_BUCKETS = 256;
 
     Aggregator aggregator;
     bool final;

dbms/src/DataStreams/MergingSortedBlockInputStream.cpp

@@ -11,7 +11,6 @@ namespace ErrorCodes
 {
     extern const int LOGICAL_ERROR;
     extern const int NUMBER_OF_COLUMNS_DOESNT_MATCH;
-    extern const int BLOCKS_HAVE_DIFFERENT_STRUCTURE;
 }
 
 
@@ -92,19 +91,7 @@ void MergingSortedBlockInputStream::init(Block & header, MutableColumns & merged
         if (!*shared_block_ptr)
             continue;
 
-        size_t src_columns = shared_block_ptr->columns();
+        assertBlocksHaveEqualStructure(*shared_block_ptr, header, getName());
-        size_t dst_columns = header.columns();
-
-        if (src_columns != dst_columns)
-            throw Exception("Merging blocks have different number of columns ("
-                + toString(src_columns) + " and " + toString(dst_columns) + ")",
-                ErrorCodes::NUMBER_OF_COLUMNS_DOESNT_MATCH);
-
-        for (size_t i = 0; i < src_columns; ++i)
-            if (!blocksHaveEqualStructure(*shared_block_ptr, header))
-                throw Exception("Merging blocks have different names or types of columns:\n"
-                    + shared_block_ptr->dumpStructure() + "\nand\n" + header.dumpStructure(),
-                    ErrorCodes::BLOCKS_HAVE_DIFFERENT_STRUCTURE);
     }
 
     merged_columns.resize(num_columns);

dbms/src/DataStreams/NativeBlockInputStream.cpp

@@ -52,7 +52,7 @@ NativeBlockInputStream::NativeBlockInputStream(ReadBuffer & istr_, UInt64 server
     for (const auto & column : index_block_it->columns)
     {
         auto type = DataTypeFactory::instance().get(column.type);
-        header.insert({ type->createColumn(), type, column.name });
+        header.insert(ColumnWithTypeAndName{ type, column.name });
     }
 }
 

dbms/src/DataStreams/NativeBlockOutputStream.cpp

@@ -20,9 +20,9 @@ namespace ErrorCodes
 
 
 NativeBlockOutputStream::NativeBlockOutputStream(
-    WriteBuffer & ostr_, UInt64 client_revision_,
+    WriteBuffer & ostr_, UInt64 client_revision_, const Block & header_,
     WriteBuffer * index_ostr_, size_t initial_size_of_file_)
-    : ostr(ostr_), client_revision(client_revision_),
+    : ostr(ostr_), client_revision(client_revision_), header(header_),
     index_ostr(index_ostr_), initial_size_of_file(initial_size_of_file_)
 {
     if (index_ostr)

dbms/src/DataStreams/NativeBlockOutputStream.h

@@ -23,9 +23,10 @@ public:
     /** If non-zero client_revision is specified, additional block information can be written.
       */
     NativeBlockOutputStream(
-        WriteBuffer & ostr_, UInt64 client_revision_ = 0,
+        WriteBuffer & ostr_, UInt64 client_revision_, const Block & header_,
         WriteBuffer * index_ostr_ = nullptr, size_t initial_size_of_file_ = 0);
 
+    Block getHeader() const override { return header; }
     void write(const Block & block) override;
     void flush() override;
 
@@ -36,7 +37,7 @@ public:
 private:
     WriteBuffer & ostr;
     UInt64 client_revision;
-
+    Block header;
     WriteBuffer * index_ostr;
     size_t initial_size_of_file;    /// The initial size of the data file, if `append` done. Used for the index.
     /// If you need to write index, then `ostr` must be a CompressedWriteBuffer.

dbms/src/DataStreams/NullBlockOutputStream.h

@@ -11,7 +11,12 @@ namespace DB
 class NullBlockOutputStream : public IBlockOutputStream
 {
 public:
+    NullBlockOutputStream(const Block & header) : header(header) {}
+    Block getHeader() const override { return header; }
     void write(const Block &) override {}
+
+private:
+    Block header;
 };
 
 }

dbms/src/DataStreams/NullableAdapterBlockInputStream.cpp

@@ -1,122 +0,0 @@
-#include <DataStreams/NullableAdapterBlockInputStream.h>
-#include <Columns/ColumnNullable.h>
-#include <Columns/ColumnsCommon.h>
-#include <DataTypes/DataTypeNullable.h>
-
-
-namespace DB
-{
-
-namespace ErrorCodes
-{
-    extern const int CANNOT_INSERT_NULL_IN_ORDINARY_COLUMN;
-    extern const int TYPE_MISMATCH;
-    extern const int NUMBER_OF_COLUMNS_DOESNT_MATCH;
-}
-
-NullableAdapterBlockInputStream::NullableAdapterBlockInputStream(
-    const BlockInputStreamPtr & input,
-    const Block & in_sample_, const Block & out_sample_)
-    : header(out_sample_)
-{
-    buildActions(in_sample_, out_sample_);
-    children.push_back(input);
-}
-
-Block NullableAdapterBlockInputStream::readImpl()
-{
-    Block block = children.back()->read();
-
-    if (!block && !must_transform)
-        return block;
-
-    Block res;
-    size_t s = block.columns();
-
-    for (size_t i = 0; i < s; ++i)
-    {
-        const auto & elem = block.getByPosition(i);
-
-        switch (actions[i])
-        {
-            case TO_ORDINARY:
-            {
-                const auto & nullable_col = static_cast<const ColumnNullable &>(*elem.column);
-                const auto & nullable_type = static_cast<const DataTypeNullable &>(*elem.type);
-
-                const auto & null_map = nullable_col.getNullMapData();
-                bool has_nulls = !memoryIsZero(null_map.data(), null_map.size());
-
-                if (has_nulls)
-                    throw Exception{"Cannot insert NULL value into non-nullable column",
-                        ErrorCodes::CANNOT_INSERT_NULL_IN_ORDINARY_COLUMN};
-                else
-                    res.insert({
-                        nullable_col.getNestedColumnPtr(),
-                        nullable_type.getNestedType(),
-                        rename[i].value_or(elem.name)
-                    });
-                break;
-            }
-            case TO_NULLABLE:
-            {
-                ColumnPtr null_map = ColumnUInt8::create(elem.column->size(), 0);
-
-                res.insert({
-                    ColumnNullable::create(elem.column, null_map),
-                    std::make_shared<DataTypeNullable>(elem.type),
-                    rename[i].value_or(elem.name)});
-                break;
-            }
-            case NONE:
-            {
-                if (rename[i])
-                    res.insert({elem.column, elem.type, *rename[i]});
-                else
-                    res.insert(elem);
-                break;
-            }
-        }
-    }
-
-    return res;
-}
-
-void NullableAdapterBlockInputStream::buildActions(
-    const Block & in_sample,
-    const Block & out_sample)
-{
-    size_t in_size = in_sample.columns();
-
-    if (out_sample.columns() != in_size)
-        throw Exception("Number of columns in INSERT SELECT doesn't match", ErrorCodes::NUMBER_OF_COLUMNS_DOESNT_MATCH);
-
-    actions.reserve(in_size);
-    rename.reserve(in_size);
-
-    for (size_t i = 0; i < in_size; ++i)
-    {
-        const auto & in_elem  = in_sample.getByPosition(i);
-        const auto & out_elem = out_sample.getByPosition(i);
-
-        bool is_in_nullable = in_elem.type->isNullable();
-        bool is_out_nullable = out_elem.type->isNullable();
-
-        if (is_in_nullable && !is_out_nullable)
-            actions.push_back(TO_ORDINARY);
-        else if (!is_in_nullable && is_out_nullable)
-            actions.push_back(TO_NULLABLE);
-        else
-            actions.push_back(NONE);
-
-        if (in_elem.name != out_elem.name)
-            rename.emplace_back(std::make_optional(out_elem.name));
-        else
-            rename.emplace_back();
-
-        if (actions.back() != NONE || rename.back())
-            must_transform = true;
-    }
-}
-
-}

dbms/src/DataStreams/NullableAdapterBlockInputStream.h

@@ -1,60 +0,0 @@
-#pragma once
-
-#include <DataStreams/IProfilingBlockInputStream.h>
-#include <optional>
-
-namespace DB
-{
-
-/// This stream allows perfoming INSERT requests in which the types of
-/// the target and source blocks are compatible up to nullability:
-///
-/// - if a target column is nullable while the corresponding source
-/// column is not, we embed the source column into a nullable column;
-/// - if a source column is nullable while the corresponding target
-/// column is not, we extract the nested column from the source
-/// while checking that is doesn't actually contain NULLs;
-/// - otherwise we just perform an identity mapping.
-class NullableAdapterBlockInputStream : public IProfilingBlockInputStream
-{
-public:
-    NullableAdapterBlockInputStream(const BlockInputStreamPtr & input, const Block & in_sample_, const Block & out_sample_);
-
-    String getName() const override { return "NullableAdapterBlockInputStream"; }
-
-    Block getHeader() const override { return header; }
-
-protected:
-    Block readImpl() override;
-
-private:
-    /// Given a column of a block we have just read,
-    /// how must we process it?
-    enum Action
-    {
-        /// Do nothing.
-        NONE = 0,
-        /// Convert nullable column to ordinary column.
-        TO_ORDINARY,
-        /// Convert non-nullable column to nullable column.
-        TO_NULLABLE
-    };
-
-    /// Actions to be taken for each column of a block.
-    using Actions = std::vector<Action>;
-
-private:
-    /// Determine the actions to be taken using the source sample block,
-    /// which describes the columns from which we fetch data inside an INSERT
-    /// query, and the target sample block which contains the columns
-    /// we insert data into.
-    void buildActions(const Block & in_sample, const Block & out_sample);
-
-private:
-    Block header;
-    Actions actions;
-    std::vector<std::optional<String>> rename;
-    bool must_transform = false;
-};
-
-}

dbms/src/DataStreams/ODBCDriverBlockOutputStream.cpp

@@ -7,9 +7,8 @@
 namespace DB
 {
 
-ODBCDriverBlockOutputStream::ODBCDriverBlockOutputStream(WriteBuffer & out_, const Block & sample_)
+ODBCDriverBlockOutputStream::ODBCDriverBlockOutputStream(WriteBuffer & out_, const Block & header_)
-    : out(out_)
+    : out(out_), header(header_)
-    , sample(sample_)
 {
 }
 
@@ -43,7 +42,7 @@ void ODBCDriverBlockOutputStream::write(const Block & block)
 
 void ODBCDriverBlockOutputStream::writePrefix()
 {
-    const size_t columns = sample.columns();
+    const size_t columns = header.columns();
 
     /// Number of columns.
     writeVarUInt(columns, out);
@@ -51,7 +50,7 @@ void ODBCDriverBlockOutputStream::writePrefix()
     /// Names and types of columns.
     for (size_t i = 0; i < columns; ++i)
     {
-        const ColumnWithTypeAndName & col = sample.getByPosition(i);
+        const ColumnWithTypeAndName & col = header.getByPosition(i);
 
         writeStringBinary(col.name, out);
         writeStringBinary(col.type->getName(), out);

dbms/src/DataStreams/ODBCDriverBlockOutputStream.h

@@ -19,8 +19,9 @@ class WriteBuffer;
 class ODBCDriverBlockOutputStream : public IBlockOutputStream
 {
 public:
-    ODBCDriverBlockOutputStream(WriteBuffer & out_, const Block & sample_);
+    ODBCDriverBlockOutputStream(WriteBuffer & out_, const Block & header_);
 
+    Block getHeader() const override { return header; }
     void write(const Block & block) override;
     void writePrefix() override;
 
@@ -29,7 +30,7 @@ public:
 
 private:
     WriteBuffer & out;
-    const Block sample;
+    const Block header;
 };
 
 }

dbms/src/DataStreams/ParallelAggregatingBlockInputStream.cpp

@@ -100,7 +100,8 @@ Block ParallelAggregatingBlockInputStream::readImpl()
 
 
 ParallelAggregatingBlockInputStream::TemporaryFileStream::TemporaryFileStream(const std::string & path)
-    : file_in(path), compressed_in(file_in), block_in(std::make_shared<NativeBlockInputStream>(compressed_in, ClickHouseRevision::get())) {}
+    : file_in(path), compressed_in(file_in),
+    block_in(std::make_shared<NativeBlockInputStream>(compressed_in, ClickHouseRevision::get())) {}
 
 
 

dbms/src/DataStreams/PrettyBlockOutputStream.cpp

@@ -17,8 +17,9 @@ namespace ErrorCodes
 }
 
 
-PrettyBlockOutputStream::PrettyBlockOutputStream(WriteBuffer & ostr_, bool no_escapes_, size_t max_rows_, const Context & context_)
+PrettyBlockOutputStream::PrettyBlockOutputStream(
-     : ostr(ostr_), max_rows(max_rows_), no_escapes(no_escapes_), context(context_)
+    WriteBuffer & ostr_, const Block & header_, bool no_escapes_, size_t max_rows_, const Context & context_)
+     : ostr(ostr_), header(header_), max_rows(max_rows_), no_escapes(no_escapes_), context(context_)
 {
     struct winsize w;
     if (0 == ioctl(STDOUT_FILENO, TIOCGWINSZ, &w))

dbms/src/DataStreams/PrettyBlockOutputStream.h

@@ -17,8 +17,9 @@ class PrettyBlockOutputStream : public IBlockOutputStream
 {
 public:
     /// no_escapes - do not use ANSI escape sequences - to display in the browser, not in the console.
-    PrettyBlockOutputStream(WriteBuffer & ostr_, bool no_escapes_, size_t max_rows_, const Context & context_);
+    PrettyBlockOutputStream(WriteBuffer & ostr_, const Block & header_, bool no_escapes_, size_t max_rows_, const Context & context_);
 
+    Block getHeader() const override { return header; }
     void write(const Block & block) override;
     void writeSuffix() override;
 
@@ -32,6 +33,7 @@ protected:
     void writeExtremes();
 
     WriteBuffer & ostr;
+    const Block header;
     size_t max_rows;
     size_t total_rows = 0;
     size_t terminal_width = 0;

dbms/src/DataStreams/PrettyCompactBlockOutputStream.h

@@ -11,8 +11,8 @@ namespace DB
 class PrettyCompactBlockOutputStream : public PrettyBlockOutputStream
 {
 public:
-    PrettyCompactBlockOutputStream(WriteBuffer & ostr_, bool no_escapes_, size_t max_rows_, const Context & context_)
+    PrettyCompactBlockOutputStream(WriteBuffer & ostr_, const Block & header_, bool no_escapes_, size_t max_rows_, const Context & context_)
-        : PrettyBlockOutputStream(ostr_, no_escapes_, max_rows_, context_) {}
+        : PrettyBlockOutputStream(ostr_, header_, no_escapes_, max_rows_, context_) {}
 
     void write(const Block & block) override;
 

dbms/src/DataStreams/PrettySpaceBlockOutputStream.h

@@ -11,8 +11,8 @@ namespace DB
 class PrettySpaceBlockOutputStream : public PrettyBlockOutputStream
 {
 public:
-    PrettySpaceBlockOutputStream(WriteBuffer & ostr_, bool no_escapes_, size_t max_rows_, const Context & context_)
+    PrettySpaceBlockOutputStream(WriteBuffer & ostr_, const Block & header_, bool no_escapes_, size_t max_rows_, const Context & context_)
-        : PrettyBlockOutputStream(ostr_, no_escapes_, max_rows_, context_) {}
+        : PrettyBlockOutputStream(ostr_, header_, no_escapes_, max_rows_, context_) {}
 
     void write(const Block & block) override;
     void writeSuffix() override;

dbms/src/DataStreams/ProhibitColumnsBlockOutputStream.cpp

@@ -1,23 +0,0 @@
-#include <Core/Block.h>
-#include <DataStreams/ProhibitColumnsBlockOutputStream.h>
-
-
-namespace DB
-{
-
-namespace ErrorCodes
-{
-    extern const int ILLEGAL_COLUMN;
-}
-
-
-void ProhibitColumnsBlockOutputStream::write(const Block & block)
-{
-    for (const auto & column : columns)
-        if (block.has(column.name))
-            throw Exception{"Cannot insert column " + column.name, ErrorCodes::ILLEGAL_COLUMN};
-
-    output->write(block);
-}
-
-}

dbms/src/DataStreams/ProhibitColumnsBlockOutputStream.h

@@ -1,31 +0,0 @@
-#pragma once
-
-#include <DataStreams/IBlockOutputStream.h>
-#include <Core/NamesAndTypes.h>
-
-
-namespace DB
-{
-
-/// Throws exception on encountering prohibited column in block
-class ProhibitColumnsBlockOutputStream : public IBlockOutputStream
-{
-public:
-    ProhibitColumnsBlockOutputStream(const BlockOutputStreamPtr & output, const NamesAndTypesList & columns)
-        : output{output}, columns{columns}
-    {
-    }
-
-private:
-    void write(const Block & block) override;
-
-    void flush() override { output->flush(); }
-
-    void writePrefix() override { output->writePrefix(); }
-    void writeSuffix() override { output->writeSuffix(); }
-
-    BlockOutputStreamPtr output;
-    NamesAndTypesList columns;
-};
-
-}