diff --git a/expression/column.go b/expression/column.go
index 058f0314ba..15b137c88f 100644
--- a/expression/column.go
+++ b/expression/column.go
@@ -235,7 +235,7 @@ func (col *Column) Equal(_ sessionctx.Context, expr Expression) bool {
 func (col *Column) EqualByExprAndID(_ sessionctx.Context, expr Expression) bool {
 	if newCol, ok := expr.(*Column); ok {
 		expr, isOk := col.VirtualExpr.(*ScalarFunction)
-		isVirExprMatched := isOk && expr.Equal(nil, newCol.VirtualExpr)
+		isVirExprMatched := isOk && expr.Equal(nil, newCol.VirtualExpr) && expr.RetType.Equal(newCol.RetType)
 		return (newCol.UniqueID == col.UniqueID) || isVirExprMatched
 	}
 	return false