This is an automated cherry-pick of pingcap#50277

Signed-off-by: ti-chi-bot <ti-community-prow-bot@tidb.io>

pkg/planner/core/casetest/hint/BUILD.bazel

@@ -0,0 +1,26 @@
+load("@io_bazel_rules_go//go:def.bzl", "go_test")
+
+go_test(
+    name = "hint_test",
+    timeout = "short",
+    srcs = [
+        "hint_test.go",
+        "main_test.go",
+    ],
+    data = glob(["testdata/**"]),
+    flaky = True,
+    shard_count = 7,
+    deps = [
+        "//pkg/config",
+        "//pkg/domain",
+        "//pkg/parser/model",
+        "//pkg/planner/core/internal",
+        "//pkg/sessionctx/variable",
+        "//pkg/testkit",
+        "//pkg/testkit/testdata",
+        "//pkg/testkit/testmain",
+        "//pkg/testkit/testsetup",
+        "@com_github_stretchr_testify//require",
+        "@org_uber_go_goleak//:goleak",
+    ],
+)

pkg/planner/core/casetest/hint/hint_test.go

@@ -0,0 +1,368 @@
+// Copyright 2023 PingCAP, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package hint
+
+import (
+	"testing"
+
+	"github.com/pingcap/tidb/pkg/domain"
+	"github.com/pingcap/tidb/pkg/parser/model"
+	"github.com/pingcap/tidb/pkg/planner/core/internal"
+	"github.com/pingcap/tidb/pkg/sessionctx/variable"
+	"github.com/pingcap/tidb/pkg/testkit"
+	"github.com/pingcap/tidb/pkg/testkit/testdata"
+	"github.com/stretchr/testify/require"
+)
+
+func TestReadFromStorageHint(t *testing.T) {
+	store := testkit.CreateMockStore(t)
+	tk := testkit.NewTestKit(t, store)
+
+	tk.MustExec("use test")
+	tk.MustExec("set tidb_cost_model_version=2")
+	tk.MustExec("drop table if exists t, tt, ttt")
+	tk.MustExec("set session tidb_allow_mpp=OFF")
+	// since allow-mpp is adjusted to false, there will be no physical plan if TiFlash cop is banned.
+	tk.MustExec("set @@session.tidb_allow_tiflash_cop=ON")
+	tk.MustExec("create table t(a int, b int, index ia(a))")
+	tk.MustExec("create table tt(a int, b int, primary key(a))")
+	tk.MustExec("create table ttt(a int, primary key (a desc))")
+
+	// Create virtual tiflash replica info.
+	dom := domain.GetDomain(tk.Session())
+	is := dom.InfoSchema()
+	db, exists := is.SchemaByName(model.NewCIStr("test"))
+	require.True(t, exists)
+	for _, tblInfo := range db.Tables {
+		tblInfo.TiFlashReplica = &model.TiFlashReplicaInfo{
+			Count:     1,
+			Available: true,
+		}
+	}
+
+	var input []string
+	var output []struct {
+		SQL  string
+		Plan []string
+		Warn []string
+	}
+	integrationSuiteData := GetIntegrationSuiteData()
+	integrationSuiteData.LoadTestCases(t, &input, &output)
+	for i, tt := range input {
+		testdata.OnRecord(func() {
+			output[i].SQL = tt
+			output[i].Plan = testdata.ConvertRowsToStrings(tk.MustQuery(tt).Rows())
+			output[i].Warn = testdata.ConvertSQLWarnToStrings(tk.Session().GetSessionVars().StmtCtx.GetWarnings())
+		})
+		res := tk.MustQuery(tt)
+		res.Check(testkit.Rows(output[i].Plan...))
+		require.Equal(t, output[i].Warn, testdata.ConvertSQLWarnToStrings(tk.Session().GetSessionVars().StmtCtx.GetWarnings()))
+	}
+}
+
+func TestAllViewHintType(t *testing.T) {
+	store := testkit.CreateMockStore(t, internal.WithMockTiFlash(2))
+	tk := testkit.NewTestKit(t, store)
+
+	tk.MustExec("use test")
+	tk.MustExec("set tidb_cost_model_version=2")
+	tk.MustExec("set @@session.tidb_allow_mpp=ON")
+	tk.MustExec("set @@session.tidb_isolation_read_engines='tiflash, tikv'")
+	tk.MustExec("drop view if exists v, v1, v2, v3, v4, v5, v6, v7, v8, v9, v10, v11, v12")
+	tk.MustExec("drop table if exists t, t1, t2, t4, t3, t5")
+	tk.MustExec("create table t(a int not null, b int, index idx_a(a));")
+	tk.MustExec("create table t1(a int not null, b int, index idx_a(a));")
+	tk.MustExec("create table t2(a int, b int, index idx_a(a));")
+	tk.MustExec("create table t3(a int, b int, index idx_a(a));")
+	tk.MustExec("create table t4(a int, b int, index idx_a(a));")
+	tk.MustExec("create table t5(a int, b int, index idx_a(a), index idx_b(b));")
+
+	// Create virtual tiflash replica info.
+	dom := domain.GetDomain(tk.Session())
+	is := dom.InfoSchema()
+	db, exists := is.SchemaByName(model.NewCIStr("test"))
+	require.True(t, exists)
+	for _, tblInfo := range db.Tables {
+		if tblInfo.Name.L == "t" {
+			tblInfo.TiFlashReplica = &model.TiFlashReplicaInfo{
+				Count:     1,
+				Available: true,
+			}
+		}
+	}
+
+	tk.MustExec("create definer='root'@'localhost' view v as select t.a, t.b from t join t1 on t.a = t1.a;")
+	tk.MustExec("create definer='root'@'localhost' view v1 as select t2.a, t2.b from t2 join t3 join v where t2.b = t3.b and t3.a = v.a;")
+	tk.MustExec("create definer='root'@'localhost' view v2 as select t.a, t.b from t join (select count(*) as a from t1 join v1 on t1.b=v1.b group by v1.a) tt on t.a = tt.a;")
+	tk.MustExec("create definer='root'@'localhost' view v3 as select * from t5 where a > 1 and b < 2;")
+	tk.MustExec("create definer='root'@'localhost' view v4 as select * from t5 where a > 1 or b < 2;")
+	tk.MustExec("create definer='root'@'localhost' view v5 as SELECT * FROM t WHERE EXISTS (SELECT 1 FROM t1 WHERE t1.b = t.b);")
+	tk.MustExec("create definer='root'@'localhost' view v6 as select * from t1 where t1.a < (select sum(t2.a) from t2 where t2.b = t1.b);")
+	tk.MustExec("create definer='root'@'localhost' view v7 as WITH CTE AS (SELECT * FROM t WHERE t.a < 60) SELECT * FROM CTE WHERE CTE.a <18 union select * from cte where cte.b > 1;")
+	tk.MustExec("create definer='root'@'localhost' view v8 as WITH CTE1 AS (SELECT b FROM t1), CTE2 AS (WITH CTE3 AS (SELECT a FROM t2), CTE4 AS (SELECT a FROM t3) SELECT CTE3.a FROM CTE3, CTE4) SELECT b FROM CTE1, CTE2 union select * from CTE1;")
+	tk.MustExec("create definer='root'@'localhost' view v9 as select sum(a) from t;")
+	tk.MustExec("create definer='root'@'localhost' view v10 as SELECT * FROM t WHERE a > 10 ORDER BY b LIMIT 1;")
+	tk.MustExec("create definer='root'@'localhost' view v11 as select a, sum(b) from t group by a")
+	tk.MustExec("create definer='root'@'localhost' view v12 as select t.a, t.b from t join t t1 on t.a = t1.a;")
+
+	var input []string
+	var output []struct {
+		SQL  string
+		Plan []string
+		Warn []string
+	}
+	integrationSuiteData := GetIntegrationSuiteData()
+	integrationSuiteData.LoadTestCases(t, &input, &output)
+	for i, tt := range input {
+		testdata.OnRecord(func() {
+			output[i].SQL = tt
+			output[i].Plan = testdata.ConvertRowsToStrings(tk.MustQuery(tt).Rows())
+			output[i].Warn = testdata.ConvertSQLWarnToStrings(tk.Session().GetSessionVars().StmtCtx.GetWarnings())
+		})
+		res := tk.MustQuery(tt)
+		res.Check(testkit.Rows(output[i].Plan...))
+		require.Equal(t, output[i].Warn, testdata.ConvertSQLWarnToStrings(tk.Session().GetSessionVars().StmtCtx.GetWarnings()))
+	}
+}
+
+func TestJoinHintCompatibility(t *testing.T) {
+	store := testkit.CreateMockStore(t, internal.WithMockTiFlash(2))
+	tk := testkit.NewTestKit(t, store)
+
+	tk.MustExec("use test")
+	tk.MustExec("set tidb_cost_model_version=2")
+	tk.MustExec("set @@session.tidb_allow_mpp=ON")
+	tk.MustExec("set @@session.tidb_isolation_read_engines='tiflash, tikv'")
+	tk.MustExec("drop view if exists v, v1, v2")
+	tk.MustExec("drop table if exists t, t1, t2, t3, t4, t5, t6, t7, t8, t9;")
+	tk.MustExec("create table t(a int not null, b int, index idx_a(a), index idx_b(b));")
+	tk.MustExec("create table t1(a int not null, b int, index idx_a(a), index idx_b(b));")
+	tk.MustExec("create table t2(a int, b int, index idx_a(a), index idx_b(b));")
+	tk.MustExec("create table t3(a int, b int, index idx_a(a), index idx_b(b));")
+	tk.MustExec("create table t4(a int, b int, index idx_a(a), index idx_b(b));")
+	tk.MustExec("create table t5(a int, b int, index idx_a(a), index idx_b(b));")
+	tk.MustExec("create table t6(a int, b int, index idx_a(a), index idx_b(b));")
+	tk.MustExec("create table t7(a int, b int, index idx_a(a), index idx_b(b)) partition by hash(a) partitions 4;")
+	tk.MustExec("create table t8(a int, b int, index idx_a(a), index idx_b(b)) partition by hash(a) partitions 4;")
+	tk.MustExec("create table t9(a int, b int, index idx_a(a), index idx_b(b)) partition by hash(a) partitions 4;")
+	tk.MustExec("analyze table t7, t8, t9")
+
+	// Create virtual tiflash replica info.
+	dom := domain.GetDomain(tk.Session())
+	is := dom.InfoSchema()
+	db, exists := is.SchemaByName(model.NewCIStr("test"))
+	require.True(t, exists)
+	for _, tblInfo := range db.Tables {
+		name := tblInfo.Name.L
+		if name == "t4" || name == "t5" || name == "t6" {
+			tblInfo.TiFlashReplica = &model.TiFlashReplicaInfo{
+				Count:     1,
+				Available: true,
+			}
+		}
+	}
+
+	tk.MustExec("create definer='root'@'localhost' view v as select /*+ leading(t1), inl_join(t1) */ t.a from t join t1 join t2 where t.a = t1.a and t1.b = t2.b;")
+	tk.MustExec("create definer='root'@'localhost' view v1 as select /*+ leading(t2), merge_join(t) */ t.a from t join t1 join t2 where t.a = t1.a and t1.b = t2.b;")
+	tk.MustExec("create definer='root'@'localhost' view v2 as select t.a from t join t1 join t2 where t.a = t1.a and t1.b = t2.b;")
+
+	var input []string
+	var output []struct {
+		SQL  string
+		Plan []string
+		Warn []string
+	}
+	integrationSuiteData := GetIntegrationSuiteData()
+	integrationSuiteData.LoadTestCases(t, &input, &output)
+	for i, tt := range input {
+		testdata.OnRecord(func() {
+			output[i].SQL = tt
+			output[i].Plan = testdata.ConvertRowsToStrings(tk.MustQuery(tt).Rows())
+			output[i].Warn = testdata.ConvertSQLWarnToStrings(tk.Session().GetSessionVars().StmtCtx.GetWarnings())
+		})
+		res := tk.MustQuery(tt)
+		res.Check(testkit.Rows(output[i].Plan...))
+		require.Equal(t, output[i].Warn, testdata.ConvertSQLWarnToStrings(tk.Session().GetSessionVars().StmtCtx.GetWarnings()))
+	}
+}
+
+func TestReadFromStorageHintAndIsolationRead(t *testing.T) {
+	store := testkit.CreateMockStore(t)
+	tk := testkit.NewTestKit(t, store)
+
+	tk.MustExec("use test")
+	tk.MustExec("set tidb_cost_model_version=2")
+	tk.MustExec("drop table if exists t, tt, ttt")
+	tk.MustExec("create table t(a int, b int, index ia(a))")
+	tk.MustExec("set @@session.tidb_isolation_read_engines=\"tikv\"")
+
+	// Create virtual tiflash replica info.
+	dom := domain.GetDomain(tk.Session())
+	is := dom.InfoSchema()
+	db, exists := is.SchemaByName(model.NewCIStr("test"))
+	require.True(t, exists)
+	for _, tblInfo := range db.Tables {
+		tblInfo.TiFlashReplica = &model.TiFlashReplicaInfo{
+			Count:     1,
+			Available: true,
+		}
+	}
+
+	var input []string
+	var output []struct {
+		SQL  string
+		Plan []string
+		Warn []string
+	}
+	integrationSuiteData := GetIntegrationSuiteData()
+	integrationSuiteData.LoadTestCases(t, &input, &output)
+	for i, tt := range input {
+		tk.Session().GetSessionVars().StmtCtx.SetWarnings(nil)
+		testdata.OnRecord(func() {
+			output[i].SQL = tt
+			output[i].Plan = testdata.ConvertRowsToStrings(tk.MustQuery(tt).Rows())
+			output[i].Warn = testdata.ConvertSQLWarnToStrings(tk.Session().GetSessionVars().StmtCtx.GetWarnings())
+		})
+		res := tk.MustQuery(tt)
+		res.Check(testkit.Rows(output[i].Plan...))
+		require.Equal(t, output[i].Warn, testdata.ConvertSQLWarnToStrings(tk.Session().GetSessionVars().StmtCtx.GetWarnings()))
+	}
+}
+
+func TestIsolationReadTiFlashUseIndexHint(t *testing.T) {
+	store := testkit.CreateMockStore(t)
+	tk := testkit.NewTestKit(t, store)
+
+	tk.MustExec("use test")
+	tk.MustExec("drop table if exists t")
+	tk.MustExec("create table t(a int, index idx(a));")
+
+	// Create virtual tiflash replica info.
+	dom := domain.GetDomain(tk.Session())
+	is := dom.InfoSchema()
+	db, exists := is.SchemaByName(model.NewCIStr("test"))
+	require.True(t, exists)
+	for _, tblInfo := range db.Tables {
+		tblInfo.TiFlashReplica = &model.TiFlashReplicaInfo{
+			Count:     1,
+			Available: true,
+		}
+	}
+
+	tk.MustExec("set @@session.tidb_isolation_read_engines=\"tiflash\"")
+	var input []string
+	var output []struct {
+		SQL  string
+		Plan []string
+		Warn []string
+	}
+	integrationSuiteData := GetIntegrationSuiteData()
+	integrationSuiteData.LoadTestCases(t, &input, &output)
+	for i, tt := range input {
+		testdata.OnRecord(func() {
+			output[i].SQL = tt
+			output[i].Plan = testdata.ConvertRowsToStrings(tk.MustQuery(tt).Rows())
+			output[i].Warn = testdata.ConvertSQLWarnToStrings(tk.Session().GetSessionVars().StmtCtx.GetWarnings())
+		})
+		res := tk.MustQuery(tt)
+		res.Check(testkit.Rows(output[i].Plan...))
+		require.Equal(t, output[i].Warn, testdata.ConvertSQLWarnToStrings(tk.Session().GetSessionVars().StmtCtx.GetWarnings()))
+	}
+}
+
+func TestOptimizeHintOnPartitionTable(t *testing.T) {
+	store := testkit.CreateMockStore(t)
+	tk := testkit.NewTestKit(t, store)
+
+	tk.MustExec("use test")
+	tk.MustExec("drop table if exists t")
+	tk.MustExec(`create table t (
+					a int, b int, c varchar(20),
+					primary key(a), key(b), key(c)
+				) partition by range columns(a) (
+					partition p0 values less than(6),
+					partition p1 values less than(11),
+					partition p2 values less than(16));`)
+	tk.MustExec(`insert into t values (1,1,"1"), (2,2,"2"), (8,8,"8"), (11,11,"11"), (15,15,"15")`)
+	tk.MustExec("set @@tidb_enable_index_merge = off")
+	defer func() {
+		tk.MustExec("set @@tidb_enable_index_merge = on")
+	}()
+
+	// Create virtual tiflash replica info.
+	dom := domain.GetDomain(tk.Session())
+	is := dom.InfoSchema()
+	db, exists := is.SchemaByName(model.NewCIStr("test"))
+	require.True(t, exists)
+	for _, tblInfo := range db.Tables {
+		if tblInfo.Name.L == "t" {
+			tblInfo.TiFlashReplica = &model.TiFlashReplicaInfo{
+				Count:     1,
+				Available: true,
+			}
+		}
+	}
+
+	tk.MustExec(`set @@tidb_partition_prune_mode='` + string(variable.Static) + `'`)
+
+	var input []string
+	var output []struct {
+		SQL  string
+		Plan []string
+		Warn []string
+	}
+	integrationSuiteData := GetIntegrationSuiteData()
+	integrationSuiteData.LoadTestCases(t, &input, &output)
+	for i, tt := range input {
+		testdata.OnRecord(func() {
+			output[i].SQL = tt
+			output[i].Plan = testdata.ConvertRowsToStrings(tk.MustQuery("explain format = 'brief' " + tt).Rows())
+			output[i].Warn = testdata.ConvertRowsToStrings(tk.MustQuery("show warnings").Rows())
+		})
+		tk.MustQuery("explain format = 'brief' " + tt).Check(testkit.Rows(output[i].Plan...))
+		tk.MustQuery("show warnings").Check(testkit.Rows(output[i].Warn...))
+	}
+	tk.MustQuery("SELECT /*+ MAX_EXECUTION_TIME(10)  */ SLEEP(5)").Check(testkit.Rows("0"))
+	tk.MustQuery("SELECT /*+ MAX_EXECUTION_TIME(10), dtc(name=tt)  */ SLEEP(5)").Check(testkit.Rows("0"))
+	require.Len(t, tk.Session().GetSessionVars().StmtCtx.GetWarnings(), 1)
+	tk.MustQuery("SELECT /*+ MAX_EXECUTION_TIME(10), dtc(name=tt) unknow(t1,t2) */ SLEEP(5)").Check(testkit.Rows("0"))
+	require.Len(t, tk.Session().GetSessionVars().StmtCtx.GetWarnings(), 2)
+}
+
+func TestHints(t *testing.T) {
+	store := testkit.CreateMockStore(t)
+	tk := testkit.NewTestKit(t, store)
+	tk.MustExec("use test")
+	tk.MustExec("create table t1 (a int);")
+	tk.MustExec("create table t2 (a int);")
+	tk.MustExec("create table t3 (a int);")
+	var input []string
+	var output []struct {
+		SQL  string
+		Plan []string
+		Warn []string
+	}
+	integrationSuiteData := GetIntegrationSuiteData()
+	integrationSuiteData.LoadTestCases(t, &input, &output)
+	for i, tt := range input {
+		testdata.OnRecord(func() {
+			output[i].SQL = tt
+			output[i].Plan = testdata.ConvertRowsToStrings(tk.MustQuery("explain format = 'brief' " + tt).Rows())
+			output[i].Warn = testdata.ConvertRowsToStrings(tk.MustQuery("show warnings").Rows())
+		})
+		tk.MustQuery("explain format = 'brief' " + tt).Check(testkit.Rows(output[i].Plan...))
+		tk.MustQuery("show warnings").Check(testkit.Rows(output[i].Warn...))
+	}
+}