src/gausskernel/storage/mot/core/storage/index/masstree/mot_masstree_struct.hpp

@@ -48,8 +48,10 @@ public:
     {
         value->print(f, prefix, indent, key, initial_timestamp, suffix);
     }
+    //the function called print will be rewrite in the sub-class.
 };
-
+// Provide a specialized value output function for the parameter of type `uint64_t`,
+// to  distinguish it from the previous generic template `value_print`.
 template <>
 class value_print<unsigned char*> {
 public:
@@ -59,7 +61,8 @@ public:
         fprintf(f, "%s%*s%.*s = %p%s\n", prefix, indent, "", key.len, key.s, value, suffix);
     }
 };
-
+//Provide a specialized value output function for the parameter of type `uint64_t`,
+//to  distinguish it from the previous generic template `value_print`.
 template <>
 class value_print<uint64_t> {
 public:
@@ -77,7 +80,8 @@ public:
         securec_check_ss(erc, "\0", "\0");
         return erc;
     }
-};
+    //The function converts the integer key value of the key into a string, and writes it into the provided buffer `buf`.
+    //Then, it returns the number of characters written.
 
 typedef key_unparse_unsigned key_unparse_type;
 
@@ -86,7 +90,7 @@ void leaf<P>::print(FILE* f, const char* prefix, int depth, int kdepth) const
 {
     return;
 }
-
+//it maybe rewrite in the sub-class,sounds like handling with leaf node.
 template <typename P>
 void internode<P>::print(FILE* f, const char* prefix, int depth, int kdepth) const
 {