From fec40ddad12b45ec488dbe12448c5dfe7c1c723f Mon Sep 17 00:00:00 2001
From: xuyifan <675434007@qq.com>
Date: Wed, 30 Nov 2022 15:52:32 +0800
Subject: [PATCH] fix

---
 executor/adapter.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/executor/adapter.go b/executor/adapter.go
index f5400b7b59409..cb1d219616729 100644
--- a/executor/adapter.go
+++ b/executor/adapter.go
@@ -465,7 +465,7 @@ func (a *ExecStmt) Exec(ctx context.Context) (_ sqlexec.RecordSet, err error) {
 		}
 		oriScan := sctx.GetSessionVars().DistSQLScanConcurrency()
 		oriIndex := sctx.GetSessionVars().IndexSerialScanConcurrency()
-		oriIso, _ := sctx.GetSessionVars().GetSystemVar(variable.TxnIsolation)
+		oriIso, ok := sctx.GetSessionVars().GetSystemVar(variable.TxnIsolation)
 		if !ok {
 			oriIso = "REPEATABLE-READ"
 		}