src/gausskernel/dbmind/db4ai/executor/gd/gd.cpp

@@ -22,6 +22,12 @@
  * ---------------------------------------------------------------------------------------
  */
 
+/*Gradient Descent is a commonly used optimization algorithm, which is used to solve 
+the minimum value of the objective function. It is an iterative algorithm. In each iteration, 
+the gradient (or approximate gradient) of the objective function is calculated, and then the
+parameters are updated along the negative gradient direction until the minimum value that 
+meets the conditions is reached.*/
+
 #include "postgres.h"
 #include "executor/executor.h"
 #include "utils/builtins.h"