added alter table command to fluent query builder

include/matador/sql/record.hpp

@@ -10,8 +10,7 @@ namespace matador::sql {
 
 struct column;
 
-class record
-{
+class record final {
 private:
   using field_ref = std::reference_wrapper<field>;
   using field_by_index = std::vector<field_ref>;
@@ -45,13 +44,11 @@ public:
   [[nodiscard]] const field& at(const column &col) const;
   [[nodiscard]] const field& at(size_t index) const;
   template<class Type>
-  std::optional<Type> at(const column &col) const
-  {
+  std::optional<Type> at(const column &col) const {
     return at(col).as<Type>();
   }
   template<class Type>
-  std::optional<Type> at(size_t index) const
-  {
+  std::optional<Type> at(const size_t index) const {
     return at(index).as<Type>();
   }
 
@@ -70,8 +67,6 @@ public:
   [[nodiscard]] bool empty() const;
   void clear();
 
-//  [[nodiscard]] bool unknown() const;
-
 private:
   void init();
   void add_to_map(field &col, size_t index);
@@ -79,8 +74,6 @@ private:
 private:
   field_by_index fields_;
   field_by_name_map fields_by_name_;
-
-//  int pk_index_{-1};
 };
 
 }