From 2ef3ac9e34b84661cca561aa7ab5e0f3f3b1746c Mon Sep 17 00:00:00 2001
From: Yuanjia Zhang <zhangyuanjia@pingcap.com>
Date: Fri, 17 May 2024 19:26:43 +0800
Subject: [PATCH] planner: skip fast-point-get for select-into-outfile
 statements (#53364)

close pingcap/tidb#42093
---
 pkg/executor/select_into_test.go   | 12 ++++++++++++
 pkg/planner/core/point_get_plan.go |  3 +++
 2 files changed, 15 insertions(+)

diff --git a/pkg/executor/select_into_test.go b/pkg/executor/select_into_test.go
index 0737683fe1b44..0587c13d9711f 100644
--- a/pkg/executor/select_into_test.go
+++ b/pkg/executor/select_into_test.go
@@ -55,6 +55,18 @@ func TestSelectIntoFileExists(t *testing.T) {
 	require.True(t, strings.Contains(err.Error(), outfile))
 }
 
+func TestSelectIntoOutfilePointGet(t *testing.T) {
+	outfile := randomSelectFilePath("TestSelectIntoOutfilePointGet")
+	store := testkit.CreateMockStore(t)
+	tk := testkit.NewTestKit(t, store)
+	tk.MustExec("use test")
+
+	tk.MustExec(`create table t (id int not null, primary key (id) /*T![clustered_index] CLUSTERED */ );`)
+	tk.MustExec(`insert into t values(1);`)
+	tk.MustExec(fmt.Sprintf("select * from t where id = 1 into outfile %q", outfile))
+	cmpAndRm("1\n", outfile, t)
+}
+
 func TestSelectIntoOutfileTypes(t *testing.T) {
 	outfile := randomSelectFilePath("TestSelectIntoOutfileTypes")
 	store := testkit.CreateMockStore(t)
diff --git a/pkg/planner/core/point_get_plan.go b/pkg/planner/core/point_get_plan.go
index 26c71c3e0a2ef..6218296f08bc1 100644
--- a/pkg/planner/core/point_get_plan.go
+++ b/pkg/planner/core/point_get_plan.go
@@ -873,6 +873,9 @@ func TryFastPlan(ctx base.PlanContext, node ast.Node) (p base.Plan) {
 	ctx.GetSessionVars().PlanColumnID.Store(0)
 	switch x := node.(type) {
 	case *ast.SelectStmt:
+		if x.SelectIntoOpt != nil {
+			return nil
+		}
 		defer func() {
 			vars := ctx.GetSessionVars()
 			if vars.SelectLimit != math2.MaxUint64 && p != nil {