From 709796c837c4c38b78d4e6ed0ca7963ea8ca8a3c Mon Sep 17 00:00:00 2001
From: HuXin0817 <202219120810@stu.cdut.edu.cn>
Date: Sat, 12 Oct 2024 19:07:57 +0800
Subject: [PATCH] =?UTF-8?q?null=20calc=5Fvalue=E9=97=AE=E9=A2=98?=
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---
 src/observer/sql/expr/expression.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/observer/sql/expr/expression.cpp b/src/observer/sql/expr/expression.cpp
index 2dc70ed0..4b75bd7e 100644
--- a/src/observer/sql/expr/expression.cpp
+++ b/src/observer/sql/expr/expression.cpp
@@ -452,6 +452,10 @@ AttrType ArithmeticExpr::value_type() const
 RC ArithmeticExpr::calc_value(const Value &left_value, const Value &right_value, Value &value) const
 {
   RC rc = RC::SUCCESS;
+  if (left_value.is_null() || right_value.is_null()) {
+    value.set_null(true);
+    return RC::SUCCESS;
+  }
 
   const AttrType target_type = value_type();
   value.set_type(target_type);