diff --git a/plugins/mysql/index.py b/plugins/mysql/index.py
index bb3928ea3..3fee990ef 100755
--- a/plugins/mysql/index.py
+++ b/plugins/mysql/index.py
@@ -3109,9 +3109,6 @@ def syncDatabaseRepair(version=''):
     mw.execShell('mkdir -p '+tmp_dir)
 
     for tb in tables:
-        primary_key_sql = "SHOW INDEX FROM "+tb+" WHERE Key_name = 'PRIMARY';";
-        primary_key_data = local_db.query(primary_key_sql)
-        pkey_name = primary_key_data[0]['Column_name']
 
         table_name = sync_args_db+'.'+tb[table_key]
         table_check_file = tmp_dir+'/'+table_name+'.txt'
@@ -3120,6 +3117,10 @@ def syncDatabaseRepair(version=''):
             # print(table_name+', 已检查OK')
             continue
 
+        primary_key_sql = "SHOW INDEX FROM "+table_name+" WHERE Key_name = 'PRIMARY';";
+        primary_key_data = local_db.query(primary_key_sql)
+        pkey_name = primary_key_data[0]['Column_name']
+
         # 比较总数
         cmd_count_sql = 'select count('+pkey_name+') as num from '+table_name
         local_count_data = local_db.query(cmd_count_sql)