added sqlite query result and enhanced column generator and value extractor

include/matador/sql/record.hpp

@@ -1,6 +1,8 @@
 #ifndef QUERY_RECORD_HPP
 #define QUERY_RECORD_HPP
 
+#include "matador/utils/access.hpp"
+
 #include "matador/sql/column.hpp"
 
 #include <vector>
@@ -23,6 +25,15 @@ public:
   record(std::initializer_list<column> columns);
   ~record() = default;
 
+  template<class Operator>
+  void process(Operator &op)
+  {
+    for(auto &col : columns_) {
+      // Todo: Find a solution to handle a column with process
+      int todo{};
+      matador::utils::access::attribute(op, col.name().c_str(), todo, col.attributes());
+    }
+  }
   template < typename Type >
   void append(const std::string &name, long size = -1)
   {