diff --git a/contrib/citext/citext.cpp b/contrib/citext/citext.cpp
index 3f318c50a..96894063e 100644
--- a/contrib/citext/citext.cpp
+++ b/contrib/citext/citext.cpp
@@ -240,26 +240,38 @@ Datum citext_ge(PG_FUNCTION_ARGS)
  *		===================
  */
 
-PG_FUNCTION_INFO_V1(citext_smaller);
-
-Datum citext_smaller(PG_FUNCTION_ARGS)
-{
-    text* left = PG_GETARG_TEXT_PP(0);
-    text* right = PG_GETARG_TEXT_PP(1);
-    text* result = NULL;
-
-    result = (citextcmp(left, right, PG_GET_COLLATION()) < 0) ? left : right;
-    PG_RETURN_TEXT_P(result);
-}
-
-PG_FUNCTION_INFO_V1(citext_larger);
-
-Datum citext_larger(PG_FUNCTION_ARGS)
-{
-    text* left = PG_GETARG_TEXT_PP(0);
-    text* right = PG_GETARG_TEXT_PP(1);
-    text* result = NULL;
-
-    result = (citextcmp(left, right, PG_GET_COLLATION()) > 0) ? left : right;
-    PG_RETURN_TEXT_P(result);
-}
+// Declare a function named citext_smaller, which is an internal function of PostgreSQL, used to compare whether the first citext value is smaller than the second.  
+PG_FUNCTION_INFO_V1(citext_smaller);  
+  
+// Implement the citext_smaller function. This function takes two parameters (two text* pointers) and returns a text* value.  
+Datum citext_smaller(PG_FUNCTION_ARGS)  
+{  
+    // Get the first and second text* pointers from the function parameters and assign them to left and right respectively.  
+    text* left = PG_GETARG_TEXT_PP(0);  
+    text* right = PG_GETARG_TEXT_PP(1);  
+    // Initialize a text* variable result, which will store the result of the comparison.  
+    text* result = NULL;  
+  
+    // Use the citextcmp function to compare left and right. If left is smaller than right, assign left to result; otherwise, assign right to result.  
+    result = (citextcmp(left, right, PG_GET_COLLATION()) < 0) ? left : right;  
+    // Return the result of the comparison.  
+    PG_RETURN_TEXT_P(result);  
+}  
+  
+// Declare a function named citext_larger, which is an internal function of PostgreSQL, used to compare whether the first citext value is larger than the second.  
+PG_FUNCTION_INFO_V1(citext_larger);  
+  
+// Implement the citext_larger function. This function takes two parameters (two text* pointers) and returns a text* value.  
+Datum citext_larger(PG_FUNCTION_ARGS)  
+{  
+    // Get the first and second text* pointers from the function parameters and assign them to left and right respectively.  
+    text* left = PG_GETARG_TEXT_PP(0);  
+    text* right = PG_GETARG_TEXT_PP(1);  
+    // Initialize a text* variable result, which will store the result of the comparison.  
+    text* result = NULL;  
+  
+    // Use the citextcmp function to compare left and right. If left is larger than right, assign left to result; otherwise, assign right to result.  
+    result = (citextcmp(left, right, PG_GET_COLLATION()) > 0) ? left : right;  
+    // Return the result of the comparison.  
+    PG_RETURN_TEXT_P(result);  
+}
\ No newline at end of file