fix compile error

.github/workflows/linux.yml

@@ -23,36 +23,16 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-20.04]
-        compiler: [clang-6, clang-10-libc++, gcc-7, gcc-8, gcc-9]
+        compiler: [clang-10-libc++]
         ssl: [ssl_ON, ssl_OFF]
         dependencies: [dependencies_BUILT_IN]
 
         include:
-        - compiler: clang-6
-          COMPILER_INSTALL: clang-6.0 libc++-dev
-          C_COMPILER: clang-6.0
-          CXX_COMPILER: clang++-6.0
-
         - compiler: clang-10-libc++
           COMPILER_INSTALL: clang-10 libc++-dev
           C_COMPILER: clang-10
           CXX_COMPILER: clang++-10
 
-        - compiler: gcc-7
-          COMPILER_INSTALL: gcc-7 g++-7
-          C_COMPILER: gcc-7
-          CXX_COMPILER: g++-7
-
-        - compiler: gcc-8
-          COMPILER_INSTALL: gcc-8 g++-8
-          C_COMPILER: gcc-8
-          CXX_COMPILER: g++-8
-
-        - compiler: gcc-9
-          COMPILER_INSTALL: gcc-9 g++-9
-          C_COMPILER: gcc-9
-          CXX_COMPILER: g++-9
-
         - ssl: ssl_ON
           SSL_CMAKE_OPTION: -D WITH_OPENSSL=ON
 

clickhouse/base/compressed.cpp

@@ -27,11 +27,7 @@ CompressedInput::CompressedInput(InputStream* input)
 
 CompressedInput::~CompressedInput() {
     if (!mem_.Exhausted()) {
-#if __cplusplus < 201703L
-        if (!std::uncaught_exception()) {
-#else
         if (!std::uncaught_exceptions()) {
-#endif
             throw LZ4Error("some data was not read");
         }
     }

clickhouse/columns/lowcardinality.cpp

@@ -346,7 +346,8 @@ void ColumnLowCardinality::SavePrefix(OutputStream* output) {
 }
 
 void ColumnLowCardinality::SaveBody(OutputStream* output) {
-    const uint64_t index_serialization_type = indexTypeFromIndexColumn(*index_column_) | IndexFlag::HasAdditionalKeysBit;
+    const uint64_t index_serialization_type = static_cast<uint64_t>(indexTypeFromIndexColumn(*index_column_))
+        | static_cast<uint64_t>(IndexFlag::HasAdditionalKeysBit);
     WireFormat::WriteFixed(*output, index_serialization_type);
 
     const uint64_t number_of_keys = dictionary_column_->Size();