diff --git a/src/sql/engine/expr/ob_expr_operator.cpp b/src/sql/engine/expr/ob_expr_operator.cpp
index 5b1af73b91..84fa4bd58c 100644
--- a/src/sql/engine/expr/ob_expr_operator.cpp
+++ b/src/sql/engine/expr/ob_expr_operator.cpp
@@ -4651,7 +4651,7 @@ int ObBitwiseExprOperator::get_uint64(const ObObj &obj,
     }
   } else {
     // need add CM_NO_RANGE_CHECK, otherwise 1 & -3.5(float) return 0.
-    EXPR_DEFINE_CAST_CTX(expr_ctx, CM_NO_RANGE_CHECK);
+    EXPR_DEFINE_CAST_CTX(expr_ctx, CM_NO_RANGE_CHECK | CM_STRING_INTEGER_TRUNC);
     EXPR_GET_UINT64_V2(obj, out);
   }
   return ret;