diff --git a/src/test/grayscale_upgrade/upgradeCheck.py b/src/test/grayscale_upgrade/upgradeCheck.py
index 48b5354c5..495d63171 100644
--- a/src/test/grayscale_upgrade/upgradeCheck.py
+++ b/src/test/grayscale_upgrade/upgradeCheck.py
@@ -211,12 +211,12 @@ class Pterodb():
 
     def spliceSqlFile(self, fileDir, scriptType="_"):
         try:
-            NewVersionNum = self.getNewVersionNum()
+            NewVersionNum = self.getNewVersionNum()		#Version number and file handling
             BaseVersionNum = self.upgrade_from
-            fileAllList = os.listdir(fileDir)
+            fileAllList = os.listdir(fileDir)	#File and directory operations
             privateFileAllList = []
             keyElement = []
-            if fileDir != check_upgrade_path:
+            if fileDir != check_upgrade_path:		#Filter the script
                 privateFileAllList = os.listdir(private_dict[fileDir])
                 commonScriptList = list(set(fileAllList) & set(privateFileAllList))
                 commonScriptList = [script for script in  commonScriptList if "407" not in script]
@@ -237,7 +237,7 @@ class Pterodb():
                     if key not in name:
                         errMsg = "The script {0} name does not meet the specifications, it needs to contain {1}".format(name, key)
                         self.writeLogFile(errMsg)
-                        raise Exception(errMsg)
+                        raise Exception(errMsg)		#Exception handling
 
             result = []
             if len(allList) != 0:
@@ -264,9 +264,9 @@ class Pterodb():
         file.write("START TRANSACTION;")
         file.write(os.linesep)
         file.write("SET IsInplaceUpgrade = on;")
-        file.write(os.linesep)
-        self.writeLogFile("fileDir is {0}, The list of files being written is {1}".format(fileDir, fileList))
-        for each_file in fileList:
+        file.write(os.linesep)		#Open the file and write the transaction and setting statements
+        self.writeLogFile("fileDir is {0}, The list of files being written is {1}".format(fileDir, fileList))		#Write file information
+        for each_file in fileList:		#Process each file
             if os.path.isfile("%s/%s" % (fileDir, each_file)):
                 each_file_with_path = "%s/%s" % (fileDir, each_file)
             elif os.path.isfile("%s/%s" % (private_dict[fileDir], each_file)):
@@ -278,27 +278,34 @@ class Pterodb():
             for txt in open(each_file_with_path,'r'):
                 file.write(txt)
             file.write(os.linesep)
-        file.write("COMMIT;")
+        file.write("COMMIT;")		#Write a transaction commit statement
         file.write(os.linesep)
-        file.close()
+        file.close()		#Close the file and complete the information record
         self.writeLogFile("Complate file {0} with the list:{1}".format(fileName, fileList))
 
-    def checkSqlResult(self, Type = "upgrade"):
+    def checkSqlResult(self, Type = "upgrade"):		#Check whether the SQL execution results contain ERROR
         cmd = "grep ERROR " + exec_sql_log
         (status, output) = commands.getstatusoutput(cmd)
         if(output.find("ERROR") != -1):
             raise Exception("Failed to execute catalog %s" % Type)
-        cmd = "grep PANIC " + exec_sql_log
+        cmd = "grep PANIC " + exec_sql_log		#Check whether the SQL execution results contain PANIC
         (status, output) = commands.getstatusoutput(cmd)
         if(output.find("PANIC") != -1):
             raise Exception("Failed to execute catalog %s" % Type)
-        cmd = "grep FATAL " + exec_sql_log
+        cmd = "grep FATAL " + exec_sql_log		#Check whether the execution result contains FATAL
         (status, output) = commands.getstatusoutput(cmd)
-        if(output.find("FATAL") != -1):
+        if(output.find("FATAL") != -1):	
             raise Exception("Failed to execute catalog %s" % Type)
 
     def upgrade_one_database(self, db_name):
         """
+      Upgrade a database 
+
+      Parameters : 
+      db _ name ( str ) : Database name 
+
+      Anomaly : 
+      Exception : An exception is thrown when the upgrade directory fails
         """
         try:
             if db_name == "postgres":
@@ -321,6 +328,13 @@ class Pterodb():
 
     def rollback_one_database(self, db_name):
         """
+       Roll back a database.
+
+          Args:
+              db_name (str): The name of the database.
+
+          Raises:
+              Exception: If rolling back the catalogs fails.
         """
         try:
             if db_name == "postgres":