update

plugins/mysql/README.md

@@ -12,4 +12,16 @@ show global  variables like 'server_uuid';
 #     drop_db_cmd = 'drop table if exists '+sync_db_import+'.'+tname[table_key]
 #     # print(drop_db_cmd)
 #     db.query(drop_db_cmd)
+```
+
+```
+# 修改同步位置
+# master_info = sync_mdb.query('show master status')
+# slave_info = db.query('show slave status')
+# if len(master_info)>0:
+#     channel_name = slave_info[0]['Channel_Name']
+#     change_cmd = "CHANGE MASTER TO  MASTER_LOG_FILE='"+master_info[0]['File']+"', MASTER_LOG_POS="+str(master_info[0]['Position'])+" for channel '"+channel_name+"';"
+#     print(change_cmd)
+#     r = db.execute(change_cmd)
+#     print(r)
 ```