diff --git a/src/sql/ob_spi.cpp b/src/sql/ob_spi.cpp
index 5df5a9c1dc..c9a3aa128b 100644
--- a/src/sql/ob_spi.cpp
+++ b/src/sql/ob_spi.cpp
@@ -1587,8 +1587,8 @@ struct ObPLSPITraceIdGuard {
     }
   }
   ObCurTraceId::TraceId origin_trace_id_;
-  const ObString &sql_;
-  const ObString &ps_sql_;
+  const ObString sql_;
+  const ObString ps_sql_;
 };
 
 //todo:@hr351303 确认sql 和 ps sql是否可以合一