planner: skip fast-point-get for select-into-outfile statements (#53364…

…) (#53414)

close #42093

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)

pkg/planner/core/point_get_plan.go

@@ -543,6 +543,9 @@ func TryFastPlan(ctx sessionctx.Context, node ast.Node) (p 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 {