Update driver_execute.py

src/gausskernel/dbmind/tools/components/index_advisor/dao/driver_execute.py

@@ -18,19 +18,19 @@ import psycopg2
 from .execute_factory import ExecuteFactory
 from .execute_factory import IndexInfo
 
-#class name: 
-#description: 
-#methods: 
-#note：
+#class name: DriverExecute （Inherits from the parent class ExecuteFactory）
+#description: The SQL statement performs the operations associated with the call
 #date: 2022/8/10
 #contact: 1865997821
 
 class DriverExecute(ExecuteFactory):
     def __init__(self, *arg):
+    #Call the arguments of the parent class __init__ method
         super(DriverExecute, self).__init__(*arg)
         self.conn = None
         self.cur = None
 
+   #Connecting to the database
     def init_conn_handle(self):
         self.conn = psycopg2.connect(dbname=self.dbname,
                                      user=self.user,
@@ -39,6 +39,7 @@ class DriverExecute(ExecuteFactory):
                                      port=self.port)
         self.cur = self.conn.cursor()
 
+#If an error occurs after the SQL statement is executed, the error information is reported to the user
     def execute(self, sql):
         try:
             self.cur.execute(sql)
@@ -47,11 +48,13 @@ class DriverExecute(ExecuteFactory):
         except Exception:
             self.conn.commit()
 
+#Disconnecting from the database
     def close_conn(self):
         if self.conn and self.cur:
             self.cur.close()
             self.conn.close()
 
+#Check whether multiple nodes exist
     def is_multi_node(self):
         self.init_conn_handle()
         try: