diff --git a/dbgpt/app/scene/chat_db/auto_execute/out_parser.py b/dbgpt/app/scene/chat_db/auto_execute/out_parser.py
index 52df403580..c2562ece84 100644
--- a/dbgpt/app/scene/chat_db/auto_execute/out_parser.py
+++ b/dbgpt/app/scene/chat_db/auto_execute/out_parser.py
@@ -56,6 +56,7 @@ def parse_prompt_response(self, model_out_text):
         else:
             try:
                 response = json.loads(clean_str, strict=False)
+                display, resp = "", ""
                 for key in sorted(response):
                     if key.strip() == "sql":
                         sql = response[key]