style fixes

dbms/src/Dictionaries/CacheDictionary.cpp

@@ -976,7 +976,7 @@ PaddedPODArray<CacheDictionary::Key> CacheDictionary::getCachedIds() const
     PaddedPODArray<Key> array;
     for (size_t idx = 0; idx < cells.size(); ++idx)
     {
-        auto& cell = cells[idx];
+        auto & cell = cells[idx];
         if (!isEmptyCell(idx))
         {
             array.push_back(cell.id);

dbms/src/Dictionaries/CacheDictionary.h

@@ -16,7 +16,6 @@
 #include <tuple>
 #include <random>
 
-class A;
 
 namespace DB
 {

dbms/src/Dictionaries/ComplexKeyHashedDictionary.cpp

@@ -505,7 +505,7 @@ void ComplexKeyHashedDictionary::has(const Attribute & attribute, const Columns
 
 std::vector<StringRef> ComplexKeyHashedDictionary::getKeys() const
 {
-    const Attribute& attribute = attributes.front();
+    const Attribute & attribute = attributes.front();
 
     switch (attribute.type)
     {
@@ -525,7 +525,7 @@ std::vector<StringRef> ComplexKeyHashedDictionary::getKeys() const
 }
 
 template <typename T>
-std::vector<StringRef> ComplexKeyHashedDictionary::getKeys(const Attribute& attribute) const
+std::vector<StringRef> ComplexKeyHashedDictionary::getKeys(const Attribute & attribute) const
 {
     const ContainerType<T> & attr = *std::get<ContainerPtrType<T>>(attribute.maps);
     std::vector<StringRef> keys;

dbms/src/Dictionaries/ComplexKeyHashedDictionary.h

@@ -194,7 +194,7 @@ private:
     std::vector<StringRef> getKeys() const;
 
     template <typename T>
-    std::vector<StringRef> getKeys(const Attribute& attribute) const;
+    std::vector<StringRef> getKeys(const Attribute & attribute) const;
 
     const std::string name;
     const DictionaryStructure dict_struct;

dbms/src/Dictionaries/DictionaryBlockInputStreamBase.cpp

@@ -11,7 +11,7 @@ DictionaryBlockInputStreamBase::DictionaryBlockInputStreamBase(size_t rows_count
 String DictionaryBlockInputStreamBase::getID() const
 {
     std::stringstream ss;
-    ss << static_cast<const void*> (this);
+    ss << static_cast<const void*>(this);
     return ss.str();
 }