diff --git a/.gitmodules b/.gitmodules
index 3e2525f500b..e69de29bb2d 100644
--- a/.gitmodules
+++ b/.gitmodules
@@ -1,3 +0,0 @@
-[submodule "contrib/mariadb-connector-c"]
-	path = contrib/mariadb-connector-c
-	url = /MariaDB/mariadb-connector-c.git
diff --git a/contrib/CMakeLists.txt b/contrib/CMakeLists.txt
index 8d9845f4140..bb61c089acc 100644
--- a/contrib/CMakeLists.txt
+++ b/contrib/CMakeLists.txt
@@ -1,31 +1,31 @@
 set (CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wno-old-style-cast")
 
 if (USE_INTERNAL_BOOST_LIBRARY)
-	add_subdirectory (libboost)
+    add_subdirectory (libboost)
 endif ()
 
 if (USE_INTERNAL_POCO_LIBRARY)
-	add_subdirectory (libpoco)
+    add_subdirectory (libpoco)
 endif ()
 
 if (USE_INTERNAL_LZ4_LIBRARY)
-	add_subdirectory (liblz4)
+    add_subdirectory (liblz4)
 endif ()
 
 if (USE_INTERNAL_ZSTD_LIBRARY)
-	add_subdirectory (libzstd)
+    add_subdirectory (libzstd)
 endif ()
 
 if (USE_INTERNAL_RE2_LIBRARY)
-	add_subdirectory (libre2)
+    add_subdirectory (libre2)
 endif ()
 
 if (USE_INTERNAL_DOUBLE_CONVERSION_LIBRARY)
-	add_subdirectory (libdouble-conversion)
+    add_subdirectory (libdouble-conversion)
 endif ()
 
 if (USE_INTERNAL_ZOOKEEPER_LIBRARY)
-	add_subdirectory (libzookeeper)
+    add_subdirectory (libzookeeper)
 endif ()
 
 if (USE_INTERNAL_CITYHASH_LIBRARY)
@@ -45,26 +45,21 @@ if (USE_INTERNAL_BTRIE_LIBRARY)
 endif ()
 
 if (USE_INTERNAL_UNWIND_LIBRARY)
-	add_subdirectory (libunwind)
+    add_subdirectory (libunwind)
 endif ()
 
 if (USE_INTERNAL_ZLIB_LIBRARY)
-	add_subdirectory (libzlib-ng)
+    add_subdirectory (libzlib-ng)
 endif ()
 
 if (USE_INTERNAL_CCTZ_LIBRARY)
-	add_subdirectory (libcctz)
+    add_subdirectory (libcctz)
 endif ()
 
 if (ENABLE_LIBTCMALLOC AND USE_INTERNAL_GPERFTOOLS_LIBRARY)
-	add_subdirectory (libtcmalloc)
+    add_subdirectory (libtcmalloc)
 endif ()
 
 if (NOT ARCH_ARM)
-	add_subdirectory (libcpuid)
-endif ()
-
-if (USE_INTERNAL_MYSQL_LIBRARY)
-    add_subdirectory (mariadb-connector-c)
-    target_include_directories (${MYSQLCLIENT_LIBRARIES} BEFORE PUBLIC ${MYSQL_INCLUDE_DIR})
+    add_subdirectory (libcpuid)
 endif ()
diff --git a/contrib/mariadb-connector-c b/contrib/mariadb-connector-c
deleted file mode 160000
index 35d6fb19961..00000000000
--- a/contrib/mariadb-connector-c
+++ /dev/null
@@ -1 +0,0 @@
-Subproject commit 35d6fb199611158109a898e695eca2564ef826fa
diff --git a/libs/libmysqlxx/CMakeLists.txt b/libs/libmysqlxx/CMakeLists.txt
index e3a35601f90..9ae1678fcac 100644
--- a/libs/libmysqlxx/CMakeLists.txt
+++ b/libs/libmysqlxx/CMakeLists.txt
@@ -32,8 +32,11 @@ target_include_directories (mysqlxx PUBLIC include)
 
 set(PLATFORM_LIBRARIES ${CMAKE_DL_LIBS})
 
-if (USE_INTERNAL_MYSQL_LIBRARY)
-elseif (USE_STATIC_LIBRARIES AND STATIC_MYSQLCLIENT_LIB)
+if (USE_MYSQL)
+    include_directories (${MYSQL_INCLUDE_DIR})
+endif ()
+
+if (USE_STATIC_LIBRARIES AND STATIC_MYSQLCLIENT_LIB)
     set (MYSQLCLIENT_LIB ${CMAKE_CURRENT_BINARY_DIR}/libmysqlclient.a)
     add_custom_command (
         OUTPUT ${MYSQLCLIENT_LIB}
diff --git a/libs/libmysqlxx/cmake/find_mysqlclient.cmake b/libs/libmysqlxx/cmake/find_mysqlclient.cmake
index 19aa1548f59..c27822ec855 100644
--- a/libs/libmysqlxx/cmake/find_mysqlclient.cmake
+++ b/libs/libmysqlxx/cmake/find_mysqlclient.cmake
@@ -1,15 +1,6 @@
 option (ENABLE_MYSQL "Enable MySQL" ON)
 
-option (USE_INTERNAL_MYSQL_LIBRARY "Set to FALSE to use system mysql library instead of bundled" ${NOT_UNBUNDLED})
-
 if (ENABLE_MYSQL)
-
-   if (NOT EXISTS "${ClickHouse_SOURCE_DIR}/contrib/mariadb-connector-c/CMakeLists.txt")
-      message (WARNING "submodule contrib/mariadb-connector-c is missing. to fix try run: git submodule update --init --recursive")
-      set (USE_INTERNAL_MYSQL_LIBRARY 0)
-   endif ()
-
-   if (NOT USE_INTERNAL_MYSQL_LIBRARY)
     set (MYSQL_LIB_PATHS
         "/usr/local/opt/mysql/lib"
         "/usr/local/lib/mysql/"
@@ -35,22 +26,16 @@ if (ENABLE_MYSQL)
     else ()
         find_library (MYSQLCLIENT_LIBRARIES mariadbclient mysqlclient PATHS ${MYSQL_LIB_PATHS})
     endif ()
-   endif ()
 
     if (MYSQL_INCLUDE_DIR AND (STATIC_MYSQLCLIENT_LIB OR MYSQLCLIENT_LIBRARIES))
-        include_directories (MYSQL_INCLUDE_DIR)
-    else ()                                   
-        set (USE_INTERNAL_MYSQL_LIBRARY 1)
-        set (MYSQLCLIENT_LIBRARIES mariadbclient)
-        set (MYSQL_INCLUDE_DIR "${ClickHouse_SOURCE_DIR}/contrib/mariadb-connector-c/include")
+        set (USE_MYSQL 1)
     endif ()
 
-    set(USE_MYSQL 1)
-    set(MYSQLXX_LIBRARY mysqlxx)
+    set (MYSQLXX_LIBRARY mysqlxx)
 endif ()
 
 if (USE_MYSQL)
-    message (STATUS "Using mysqlclient=${USE_MYSQL}: ${MYSQL_INCLUDE_DIR} : ${MYSQLCLIENT_LIBRARIES}; staticlib=${STATIC_MYSQLCLIENT_LIB} internal=${USE_INTERNAL_MYSQL_LIBRARY}")
+    message (STATUS "Using mysqlclient=${USE_MYSQL}: ${MYSQL_INCLUDE_DIR} : ${MYSQLCLIENT_LIBRARIES}; staticlib=${STATIC_MYSQLCLIENT_LIB}")
 else ()
     message (STATUS "Build without mysqlclient (support for MYSQL dictionary source will be disabled)")
 endif ()