diff --git a/src/sql/engine/cmd/ob_routine_executor.cpp b/src/sql/engine/cmd/ob_routine_executor.cpp
index 8c768cc30d..5607194139 100644
--- a/src/sql/engine/cmd/ob_routine_executor.cpp
+++ b/src/sql/engine/cmd/ob_routine_executor.cpp
@@ -123,7 +123,7 @@ int ObCallProcedureExecutor::execute(ObExecContext &ctx, ObCallProcedureStmt &st
         } else {
           param.reset();
           param.ObObj::reset();
-          if (OB_FAIL(ObSQLUtils::calc_sql_expression_without_row(ctx, *expr, param))) {
+          if (OB_FAIL(calc_param(ctx, *expr, param))) {
             LOG_WARN("failed to calc exec param expr", K(i), K(*expr), K(ret));
           } else {
             if (expr->get_is_pl_mock_default_expr()) {
@@ -292,6 +292,21 @@ int ObCallProcedureExecutor::execute(ObExecContext &ctx, ObCallProcedureStmt &st
   return ret;
 }
 
+int ObCallProcedureExecutor::calc_param(ObExecContext &ctx, const ObISqlExpression &expr, ObObjParam &result)
+{
+  int ret = OB_SUCCESS;
+  OZ (ObSQLUtils::calc_sql_expression_without_row(ctx, expr, result), K(expr));
+  if (OB_SUCC(ret) && !result.is_ext()) {
+    const sql::ObExpr *new_expr = expr.get_expr();
+    CK (OB_NOT_NULL(new_expr));
+    OX (result.set_length(new_expr->max_length_));
+    OX (result.set_precision(new_expr->datum_meta_.precision_));
+    OX (result.set_scale(new_expr->datum_meta_.scale_));
+    OX (result.set_length_semantics(new_expr->datum_meta_.length_semantics_));
+  }
+  return ret;
+}
+
 int ObDropRoutineExecutor::execute(ObExecContext &ctx, ObDropRoutineStmt &stmt)
 {
   int ret = OB_SUCCESS;
diff --git a/src/sql/engine/cmd/ob_routine_executor.h b/src/sql/engine/cmd/ob_routine_executor.h
index d15f3ef6fe..8cac5186d9 100644
--- a/src/sql/engine/cmd/ob_routine_executor.h
+++ b/src/sql/engine/cmd/ob_routine_executor.h
@@ -65,7 +65,7 @@ public:
   ObCallProcedureExecutor() {}
   virtual ~ObCallProcedureExecutor() {}
   int execute(ObExecContext &ctx, ObCallProcedureStmt &stmt);
-
+  int calc_param(ObExecContext &ctx, const ObISqlExpression &expr, ObObjParam &result);
 private:
   DISALLOW_COPY_AND_ASSIGN(ObCallProcedureExecutor);
 };