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placement_policy_test.go
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// Copyright 2021 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 ddl_test
import (
"context"
"encoding/json"
"fmt"
"math"
"strconv"
"testing"
"github.com/pingcap/failpoint"
"github.com/pingcap/tidb/ddl"
"github.com/pingcap/tidb/ddl/placement"
"github.com/pingcap/tidb/ddl/util"
"github.com/pingcap/tidb/domain"
"github.com/pingcap/tidb/domain/infosync"
mysql "github.com/pingcap/tidb/errno"
"github.com/pingcap/tidb/infoschema"
"github.com/pingcap/tidb/kv"
"github.com/pingcap/tidb/meta"
"github.com/pingcap/tidb/parser/model"
"github.com/pingcap/tidb/sessionctx"
"github.com/pingcap/tidb/store/gcworker"
"github.com/pingcap/tidb/testkit"
"github.com/pingcap/tidb/testkit/external"
"github.com/stretchr/testify/require"
)
func checkExistTableBundlesInPD(t *testing.T, do *domain.Domain, dbName string, tbName string) {
tblInfo, err := do.InfoSchema().TableByName(model.NewCIStr(dbName), model.NewCIStr(tbName))
require.NoError(t, err)
require.NoError(t, kv.RunInNewTxn(context.TODO(), do.Store(), false, func(ctx context.Context, txn kv.Transaction) error {
tt := meta.NewMeta(txn)
checkTableBundlesInPD(t, do, tt, tblInfo.Meta())
return nil
}))
}
func checkAllBundlesNotChange(t *testing.T, bundles []*placement.Bundle) {
currentBundles, err := infosync.GetAllRuleBundles(context.TODO())
require.NoError(t, err)
bundlesMap := make(map[string]*placement.Bundle)
for _, bundle := range currentBundles {
bundlesMap[bundle.ID] = bundle
}
require.Equal(t, len(currentBundles), len(bundlesMap))
require.Equal(t, len(bundles), len(currentBundles))
for _, bundle := range bundles {
got, ok := bundlesMap[bundle.ID]
require.True(t, ok)
expectedJSON, err := json.Marshal(bundle)
require.NoError(t, err)
gotJSON, err := json.Marshal(got)
require.NoError(t, err)
require.Equal(t, string(expectedJSON), string(gotJSON))
}
}
func checkTableBundlesInPD(t *testing.T, do *domain.Domain, tt *meta.Meta, tblInfo *model.TableInfo) {
checks := make([]*struct {
ID string
tableID int64
bundle *placement.Bundle
}, 0)
bundle, err := placement.NewTableBundle(tt, tblInfo)
require.NoError(t, err)
checks = append(checks, &struct {
ID string
tableID int64
bundle *placement.Bundle
}{ID: placement.GroupID(tblInfo.ID), tableID: tblInfo.ID, bundle: bundle})
if tblInfo.Partition != nil {
for _, def := range tblInfo.Partition.Definitions {
bundle, err := placement.NewPartitionBundle(tt, def)
require.NoError(t, err)
checks = append(checks, &struct {
ID string
tableID int64
bundle *placement.Bundle
}{ID: placement.GroupID(def.ID), tableID: def.ID, bundle: bundle})
}
}
is := do.InfoSchema()
for _, check := range checks {
pdGot, err := infosync.GetRuleBundle(context.TODO(), check.ID)
require.NoError(t, err)
isGot, ok := is.PlacementBundleByPhysicalTableID(check.tableID)
if check.bundle == nil {
require.True(t, pdGot.IsEmpty(), "bundle should be nil for table: %d", check.tableID)
require.False(t, ok, "bundle should be nil for table: %d", check.tableID)
} else {
expectedJSON, err := json.Marshal(check.bundle)
require.NoError(t, err)
pdGotJSON, err := json.Marshal(pdGot)
require.NoError(t, err)
require.NotNil(t, pdGot)
require.Equal(t, string(expectedJSON), string(pdGotJSON))
isGotJSON, err := json.Marshal(isGot)
require.NoError(t, err)
require.NotNil(t, isGot)
require.Equal(t, string(expectedJSON), string(isGotJSON))
}
}
}
func TestPlacementPolicy(t *testing.T) {
store, dom, clean := testkit.CreateMockStoreAndDomain(t)
defer clean()
// clearAllBundles(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
tk.MustExec("drop placement policy if exists x")
hook := &ddl.TestDDLCallback{Do: dom}
var policyID int64
hook.OnJobUpdatedExported = func(job *model.Job) {
if policyID != 0 {
return
}
// job.SchemaID will be assigned when the policy is created.
if job.SchemaName == "x" && job.Type == model.ActionCreatePlacementPolicy && job.SchemaID != 0 {
policyID = job.SchemaID
return
}
}
dom.DDL().SetHook(hook)
tk.MustExec("create placement policy x " +
"LEARNERS=1 " +
"LEARNER_CONSTRAINTS=\"[+region=cn-west-1]\" " +
"FOLLOWERS=3 " +
"FOLLOWER_CONSTRAINTS=\"[+disk=ssd]\"")
checkFunc := func(policyInfo *model.PolicyInfo) {
require.Equal(t, true, policyInfo.ID != 0)
require.Equal(t, "x", policyInfo.Name.L)
require.Equal(t, uint64(3), policyInfo.Followers)
require.Equal(t, "[+disk=ssd]", policyInfo.FollowerConstraints)
require.Equal(t, uint64(0), policyInfo.Voters)
require.Equal(t, "", policyInfo.VoterConstraints)
require.Equal(t, uint64(1), policyInfo.Learners)
require.Equal(t, "[+region=cn-west-1]", policyInfo.LearnerConstraints)
require.Equal(t, model.StatePublic, policyInfo.State)
require.Equal(t, "", policyInfo.Schedule)
}
// Check the policy is correctly reloaded in the information schema.
po := testGetPolicyByNameFromIS(t, tk.Session(), "x")
checkFunc(po)
// Check the policy is correctly written in the kv meta.
po = testGetPolicyByIDFromMeta(t, store, policyID)
checkFunc(po)
tk.MustGetErrCode("create placement policy x "+
"PRIMARY_REGION=\"cn-east-1\" "+
"REGIONS=\"cn-east-1,cn-east-2\" ", mysql.ErrPlacementPolicyExists)
tk.MustGetErrCode("create placement policy X "+
"PRIMARY_REGION=\"cn-east-1\" "+
"REGIONS=\"cn-east-1,cn-east-2\" ", mysql.ErrPlacementPolicyExists)
tk.MustGetErrCode("create placement policy `X` "+
"PRIMARY_REGION=\"cn-east-1\" "+
"REGIONS=\"cn-east-1,cn-east-2\" ", mysql.ErrPlacementPolicyExists)
tk.MustExec("create placement policy if not exists X " +
"PRIMARY_REGION=\"cn-east-1\" " +
"REGIONS=\"cn-east-1,cn-east-2\" ")
tk.MustQuery("show warnings").Check(testkit.Rows("Note 8238 Placement policy 'X' already exists"))
bundles, err := infosync.GetAllRuleBundles(context.TODO())
require.NoError(t, err)
require.Equal(t, len(bundles), 0)
tk.MustExec("drop placement policy x")
tk.MustGetErrCode("drop placement policy x", mysql.ErrPlacementPolicyNotExists)
tk.MustExec("drop placement policy if exists x")
tk.MustQuery("show warnings").Check(testkit.Rows("Note 8239 Unknown placement policy 'x'"))
// TODO: privilege check & constraint syntax check.
}
func TestCreatePlacementPolicyWithInfo(t *testing.T) {
store, dom, clean := testkit.CreateMockStoreAndDomain(t)
defer clean()
// clearAllBundles(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
tk.MustExec("drop table if exists tp")
tk.MustExec("drop placement policy if exists p")
tk.MustExec("create placement policy p " +
"LEARNERS=1 " +
"LEARNER_CONSTRAINTS=\"[+region=cn-west-1]\" " +
"FOLLOWERS=3 " +
"FOLLOWER_CONSTRAINTS=\"[+disk=ssd]\"")
defer tk.MustExec("drop placement policy if exists p")
defer tk.MustExec("drop placement policy if exists p2")
tk.MustExec(`CREATE TABLE tp(id int) placement policy p PARTITION BY RANGE (id) (
PARTITION p0 VALUES LESS THAN (100) PLACEMENT POLICY p,
PARTITION p1 VALUES LESS THAN (1000))
`)
defer tk.MustExec("drop table if exists tp")
oldPolicy, ok := dom.InfoSchema().PolicyByName(model.NewCIStr("p"))
oldPolicy = oldPolicy.Clone()
require.True(t, ok)
// create a non exist policy
for _, onExist := range []ddl.OnExist{ddl.OnExistReplace, ddl.OnExistIgnore, ddl.OnExistError} {
newPolicy := oldPolicy.Clone()
newPolicy.Name = model.NewCIStr("p2")
newPolicy.Followers = 2
newPolicy.LearnerConstraints = "[+zone=z2]"
tk.Session().SetValue(sessionctx.QueryString, "skip")
err := dom.DDL().CreatePlacementPolicyWithInfo(tk.Session(), newPolicy.Clone(), onExist)
require.NoError(t, err)
// old policy should not be changed
found, ok := dom.InfoSchema().PolicyByName(model.NewCIStr("p"))
require.True(t, ok)
checkPolicyEquals(t, oldPolicy, found)
checkExistTableBundlesInPD(t, dom, "test", "tp")
// new created policy
found, ok = dom.InfoSchema().PolicyByName(model.NewCIStr("p2"))
require.True(t, ok)
// ID of the created policy should be reassigned
require.NotEqual(t, newPolicy.ID, found.ID)
newPolicy.ID = found.ID
checkPolicyEquals(t, newPolicy, found)
tk.MustExec("drop placement policy if exists p2")
}
// create same name policy with on exists error
newPolicy := oldPolicy.Clone()
newPolicy.ID = oldPolicy.ID + 1
tk.Session().SetValue(sessionctx.QueryString, "skip")
err := dom.DDL().CreatePlacementPolicyWithInfo(tk.Session(), newPolicy.Clone(), ddl.OnExistError)
require.Error(t, err)
require.True(t, infoschema.ErrPlacementPolicyExists.Equal(err))
found, ok := dom.InfoSchema().PolicyByName(model.NewCIStr("p"))
require.True(t, ok)
checkPolicyEquals(t, oldPolicy, found)
checkExistTableBundlesInPD(t, dom, "test", "tp")
// create same name policy with on exist ignore
newPolicy = oldPolicy.Clone()
newPolicy.ID = oldPolicy.ID + 1
tk.Session().SetValue(sessionctx.QueryString, "skip")
err = dom.DDL().CreatePlacementPolicyWithInfo(tk.Session(), newPolicy.Clone(), ddl.OnExistIgnore)
require.NoError(t, err)
found, ok = dom.InfoSchema().PolicyByName(model.NewCIStr("p"))
require.True(t, ok)
checkPolicyEquals(t, oldPolicy, found)
checkExistTableBundlesInPD(t, dom, "test", "tp")
// create same name policy with on exist replace
newPolicy = oldPolicy.Clone()
newPolicy.ID = oldPolicy.ID + 1
newPolicy.Followers = 1
newPolicy.LearnerConstraints = "[+zone=z1]"
tk.Session().SetValue(sessionctx.QueryString, "skip")
err = dom.DDL().CreatePlacementPolicyWithInfo(tk.Session(), newPolicy.Clone(), ddl.OnExistReplace)
require.NoError(t, err)
found, ok = dom.InfoSchema().PolicyByName(model.NewCIStr("p"))
require.True(t, ok)
// when replace a policy the old policy's id should not be changed
newPolicy.ID = oldPolicy.ID
checkPolicyEquals(t, newPolicy, found)
checkExistTableBundlesInPD(t, dom, "test", "tp")
}
func checkPolicyEquals(t *testing.T, expected *model.PolicyInfo, actual *model.PolicyInfo) {
require.Equal(t, expected.ID, actual.ID)
require.Equal(t, expected.Name, actual.Name)
require.Equal(t, *expected.PlacementSettings, *actual.PlacementSettings)
require.Equal(t, expected.State, actual.State)
}
func TestPlacementFollowers(t *testing.T) {
store, clean := testkit.CreateMockStore(t)
defer clean()
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
defer tk.MustExec("drop placement policy if exists x")
tk.MustExec("drop placement policy if exists x")
tk.MustGetErrMsg("create placement policy x FOLLOWERS=99", "invalid placement option: followers should be less than or equal to 8: 99")
tk.MustExec("drop placement policy if exists x")
tk.MustExec("create placement policy x FOLLOWERS=4")
tk.MustGetErrMsg("alter placement policy x FOLLOWERS=99", "invalid placement option: followers should be less than or equal to 8: 99")
}
func testGetPolicyByIDFromMeta(t *testing.T, store kv.Storage, policyID int64) *model.PolicyInfo {
var (
policyInfo *model.PolicyInfo
err error
)
err1 := kv.RunInNewTxn(context.Background(), store, false, func(ctx context.Context, txn kv.Transaction) error {
t := meta.NewMeta(txn)
policyInfo, err = t.GetPolicy(policyID)
if err != nil {
return err
}
return nil
})
require.Nil(t, err1)
require.NotNil(t, policyInfo)
return policyInfo
}
func testGetPolicyByNameFromIS(t *testing.T, ctx sessionctx.Context, policy string) *model.PolicyInfo {
dom := domain.GetDomain(ctx)
// Make sure the table schema is the new schema.
err := dom.Reload()
require.NoError(t, err)
po, ok := dom.InfoSchema().PolicyByName(model.NewCIStr(policy))
require.Equal(t, true, ok)
return po
}
func TestPlacementValidation(t *testing.T) {
store, clean := testkit.CreateMockStore(t)
defer clean()
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
tk.MustExec("drop placement policy if exists x")
cases := []struct {
name string
settings string
success bool
errmsg string
}{
{
name: "Dict is not allowed for common constraint",
settings: "LEARNERS=1 " +
"LEARNER_CONSTRAINTS=\"[+zone=cn-west-1]\" " +
"CONSTRAINTS=\"{'+disk=ssd':2}\"",
errmsg: "invalid label constraints format: 'Constraints' should be [constraint1, ...] or any yaml compatible array representation",
},
{
name: "constraints may be incompatible with itself",
settings: "FOLLOWERS=3 LEARNERS=1 " +
"LEARNER_CONSTRAINTS=\"[+zone=cn-west-1, +zone=cn-west-2]\"",
errmsg: "invalid label constraints format: should be [constraint1, ...] (error conflicting label constraints: '+zone=cn-west-2' and '+zone=cn-west-1'), {constraint1: cnt1, ...} (error yaml: unmarshal errors:\n" +
" line 1: cannot unmarshal !!seq into map[string]int), or any yaml compatible representation: invalid LearnerConstraints",
},
{
settings: "PRIMARY_REGION=\"cn-east-1\" " +
"REGIONS=\"cn-east-1,cn-east-2\" ",
success: true,
},
}
// test for create
for _, ca := range cases {
sql := fmt.Sprintf("%s %s", "create placement policy x", ca.settings)
if ca.success {
tk.MustExec(sql)
tk.MustExec("drop placement policy if exists x")
} else {
err := tk.ExecToErr(sql)
require.NotNil(t, err)
require.EqualErrorf(t, err, ca.errmsg, ca.name)
}
}
// test for alter
tk.MustExec("create placement policy x primary_region=\"cn-east-1\" regions=\"cn-east-1,cn-east\"")
for _, ca := range cases {
sql := fmt.Sprintf("%s %s", "alter placement policy x", ca.settings)
if ca.success {
tk.MustExec(sql)
tk.MustExec("alter placement policy x primary_region=\"cn-east-1\" regions=\"cn-east-1,cn-east\"")
} else {
err := tk.ExecToErr(sql)
require.Error(t, err)
require.Equal(t, ca.errmsg, err.Error())
tk.MustQuery("show placement where target='POLICY x'").Check(testkit.Rows("POLICY x PRIMARY_REGION=\"cn-east-1\" REGIONS=\"cn-east-1,cn-east\" NULL"))
}
}
tk.MustExec("drop placement policy x")
}
func TestResetSchemaPlacement(t *testing.T) {
store, clean := testkit.CreateMockStore(t)
defer clean()
tk := testkit.NewTestKit(t, store)
tk.MustExec("drop database if exists TestResetPlacementDB;")
tk.MustExec("create placement policy `TestReset` followers=4;")
tk.MustGetErrCode("create placement policy `default` followers=4;", mysql.ErrReservedSyntax)
tk.MustGetErrCode("create placement policy default followers=4;", mysql.ErrParse)
tk.MustExec("create database TestResetPlacementDB placement policy `TestReset`;")
tk.MustExec("use TestResetPlacementDB")
// Test for `=default`
tk.MustQuery(`show create database TestResetPlacementDB`).Check(testkit.RowsWithSep("|",
"TestResetPlacementDB CREATE DATABASE `TestResetPlacementDB` /*!40100 DEFAULT CHARACTER SET utf8mb4 */ "+
"/*T![placement] PLACEMENT POLICY=`TestReset` */",
))
tk.MustExec("ALTER DATABASE TestResetPlacementDB PLACEMENT POLICY=default;")
tk.MustQuery(`show create database TestResetPlacementDB`).Check(testkit.RowsWithSep("|",
"TestResetPlacementDB CREATE DATABASE `TestResetPlacementDB` /*!40100 DEFAULT CHARACTER SET utf8mb4 */",
))
// Test for `SET DEFAULT`
tk.MustExec("ALTER DATABASE TestResetPlacementDB PLACEMENT POLICY=`TestReset`;")
tk.MustQuery(`show create database TestResetPlacementDB`).Check(testkit.RowsWithSep("|",
"TestResetPlacementDB CREATE DATABASE `TestResetPlacementDB` /*!40100 DEFAULT CHARACTER SET utf8mb4 */ "+
"/*T![placement] PLACEMENT POLICY=`TestReset` */",
))
tk.MustExec("ALTER DATABASE TestResetPlacementDB PLACEMENT POLICY SET DEFAULT")
tk.MustQuery(`show create database TestResetPlacementDB`).Check(testkit.RowsWithSep("|",
"TestResetPlacementDB CREATE DATABASE `TestResetPlacementDB` /*!40100 DEFAULT CHARACTER SET utf8mb4 */",
))
// Test for `= 'DEFAULT'`
tk.MustExec("ALTER DATABASE TestResetPlacementDB PLACEMENT POLICY=`TestReset`;")
tk.MustQuery(`show create database TestResetPlacementDB`).Check(testkit.RowsWithSep("|",
"TestResetPlacementDB CREATE DATABASE `TestResetPlacementDB` /*!40100 DEFAULT CHARACTER SET utf8mb4 */ "+
"/*T![placement] PLACEMENT POLICY=`TestReset` */",
))
tk.MustExec("ALTER DATABASE TestResetPlacementDB PLACEMENT POLICY = 'DEFAULT'")
tk.MustQuery(`show create database TestResetPlacementDB`).Check(testkit.RowsWithSep("|",
"TestResetPlacementDB CREATE DATABASE `TestResetPlacementDB` /*!40100 DEFAULT CHARACTER SET utf8mb4 */",
))
// Test for "= `DEFAULT`"
tk.MustExec("ALTER DATABASE TestResetPlacementDB PLACEMENT POLICY=`TestReset`;")
tk.MustQuery(`show create database TestResetPlacementDB`).Check(testkit.RowsWithSep("|",
"TestResetPlacementDB CREATE DATABASE `TestResetPlacementDB` /*!40100 DEFAULT CHARACTER SET utf8mb4 */ "+
"/*T![placement] PLACEMENT POLICY=`TestReset` */",
))
tk.MustExec("ALTER DATABASE TestResetPlacementDB PLACEMENT POLICY = `DEFAULT`")
tk.MustQuery(`show create database TestResetPlacementDB`).Check(testkit.RowsWithSep("|",
"TestResetPlacementDB CREATE DATABASE `TestResetPlacementDB` /*!40100 DEFAULT CHARACTER SET utf8mb4 */",
))
tk.MustExec("drop placement policy `TestReset`;")
tk.MustExec("drop database TestResetPlacementDB;")
}
func TestCreateOrReplacePlacementPolicy(t *testing.T) {
store, dom, clean := testkit.CreateMockStoreAndDomain(t)
defer clean()
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
tk.MustExec("drop placement policy if exists x")
tk.MustExec("drop table if exists tp")
// If the policy does not exist, CREATE OR REPLACE PLACEMENT POLICY is the same as CREATE PLACEMENT POLICY
tk.MustExec("create or replace placement policy x primary_region=\"cn-east-1\" regions=\"cn-east-1,cn-east\"")
defer tk.MustExec("drop placement policy if exists x")
tk.MustQuery("show create placement policy x").Check(testkit.Rows("x CREATE PLACEMENT POLICY `x` PRIMARY_REGION=\"cn-east-1\" REGIONS=\"cn-east-1,cn-east\""))
// create a table refers the policy
tk.MustExec(`CREATE TABLE tp(id int) placement policy x PARTITION BY RANGE (id) (
PARTITION p0 VALUES LESS THAN (100) PLACEMENT POLICY x,
PARTITION p1 VALUES LESS THAN (1000))
`)
defer tk.MustExec("drop table if exists tp")
// If the policy does exist, CREATE OR REPLACE PLACEMENT_POLICY is the same as ALTER PLACEMENT POLICY.
tk.MustExec("create or replace placement policy x primary_region=\"cn-east-1\" regions=\"cn-east-1\"")
tk.MustQuery("show create placement policy x").Check(testkit.Rows("x CREATE PLACEMENT POLICY `x` PRIMARY_REGION=\"cn-east-1\" REGIONS=\"cn-east-1\""))
checkExistTableBundlesInPD(t, dom, "test", "tp")
// Cannot be used together with the if not exists clause. Ref: https://mariadb.com/kb/en/create-view
tk.MustGetErrMsg("create or replace placement policy if not exists x primary_region=\"cn-east-1\" regions=\"cn-east-1\"", "[ddl:1221]Incorrect usage of OR REPLACE and IF NOT EXISTS")
}
func TestAlterPlacementPolicy(t *testing.T) {
store, dom, clean := testkit.CreateMockStoreAndDomain(t)
defer clean()
// clearAllBundles(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
tk.MustExec("drop placement policy if exists x")
tk.MustExec("drop table if exists tp")
tk.MustExec("create placement policy x primary_region=\"cn-east-1\" regions=\"cn-east-1,cn-east\"")
defer tk.MustExec("drop placement policy if exists x")
// create a table ref to policy x, testing for alter policy will update PD bundles
tk.MustExec(`CREATE TABLE tp (id INT) placement policy x PARTITION BY RANGE (id) (
PARTITION p0 VALUES LESS THAN (100),
PARTITION p1 VALUES LESS THAN (1000) placement policy x
);`)
defer tk.MustExec("drop table if exists tp")
policy, ok := dom.InfoSchema().PolicyByName(model.NewCIStr("x"))
require.True(t, ok)
// test for normal cases
tk.MustExec("alter placement policy x PRIMARY_REGION=\"bj\" REGIONS=\"bj,sh\"")
tk.MustQuery("show placement where target='POLICY x'").Check(testkit.Rows("POLICY x PRIMARY_REGION=\"bj\" REGIONS=\"bj,sh\" NULL"))
tk.MustQuery("select * from information_schema.placement_policies where policy_name = 'x'").Check(testkit.Rows(strconv.FormatInt(policy.ID, 10) + " def x bj bj,sh 2 0"))
checkExistTableBundlesInPD(t, dom, "test", "tp")
tk.MustExec("alter placement policy x " +
"PRIMARY_REGION=\"bj\" " +
"REGIONS=\"bj\" " +
"SCHEDULE=\"EVEN\"")
tk.MustQuery("show placement where target='POLICY x'").Check(testkit.Rows("POLICY x PRIMARY_REGION=\"bj\" REGIONS=\"bj\" SCHEDULE=\"EVEN\" NULL"))
tk.MustQuery("select * from INFORMATION_SCHEMA.PLACEMENT_POLICIES WHERE POLICY_NAME='x'").Check(testkit.Rows(strconv.FormatInt(policy.ID, 10) + " def x bj bj EVEN 2 0"))
checkExistTableBundlesInPD(t, dom, "test", "tp")
tk.MustExec("alter placement policy x " +
"LEADER_CONSTRAINTS=\"[+region=us-east-1]\" " +
"FOLLOWER_CONSTRAINTS=\"[+region=us-east-2]\" " +
"FOLLOWERS=3")
tk.MustQuery("show placement where target='POLICY x'").Check(
testkit.Rows("POLICY x LEADER_CONSTRAINTS=\"[+region=us-east-1]\" FOLLOWERS=3 FOLLOWER_CONSTRAINTS=\"[+region=us-east-2]\" NULL"),
)
tk.MustQuery("SELECT POLICY_NAME,LEADER_CONSTRAINTS,FOLLOWER_CONSTRAINTS,FOLLOWERS FROM information_schema.PLACEMENT_POLICIES WHERE POLICY_NAME = 'x'").Check(
testkit.Rows("x [+region=us-east-1] [+region=us-east-2] 3"),
)
checkExistTableBundlesInPD(t, dom, "test", "tp")
tk.MustExec("alter placement policy x " +
"VOTER_CONSTRAINTS=\"[+region=bj]\" " +
"LEARNER_CONSTRAINTS=\"[+region=sh]\" " +
"CONSTRAINTS=\"[+disk=ssd]\"" +
"VOTERS=5 " +
"LEARNERS=3")
tk.MustQuery("show placement where target='POLICY x'").Check(
testkit.Rows("POLICY x CONSTRAINTS=\"[+disk=ssd]\" VOTERS=5 VOTER_CONSTRAINTS=\"[+region=bj]\" LEARNERS=3 LEARNER_CONSTRAINTS=\"[+region=sh]\" NULL"),
)
tk.MustQuery("SELECT " +
"CATALOG_NAME,POLICY_NAME," +
"PRIMARY_REGION,REGIONS,CONSTRAINTS,LEADER_CONSTRAINTS,FOLLOWER_CONSTRAINTS,LEARNER_CONSTRAINTS," +
"SCHEDULE,FOLLOWERS,LEARNERS FROM INFORMATION_SCHEMA.placement_policies WHERE POLICY_NAME='x'").Check(
testkit.Rows("def x [+disk=ssd] [+region=sh] 2 3"),
)
checkExistTableBundlesInPD(t, dom, "test", "tp")
// test alter not exist policies
tk.MustExec("drop table tp")
tk.MustExec("drop placement policy x")
tk.MustGetErrCode("alter placement policy x REGIONS=\"bj,sh\"", mysql.ErrPlacementPolicyNotExists)
tk.MustGetErrCode("alter placement policy x2 REGIONS=\"bj,sh\"", mysql.ErrPlacementPolicyNotExists)
tk.MustQuery("select * from INFORMATION_SCHEMA.PLACEMENT_POLICIES WHERE POLICY_NAME='x'").Check(testkit.Rows())
}
func TestCreateTableWithPlacementPolicy(t *testing.T) {
store, clean := testkit.CreateMockStore(t)
defer clean()
// clearAllBundles(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
tk.MustExec("drop table if exists t,t_range_p,t_hash_p,t_list_p")
tk.MustExec("drop placement policy if exists x")
tk.MustExec("drop placement policy if exists y")
defer func() {
tk.MustExec("drop table if exists t,t_range_p,t_hash_p,t_list_p")
tk.MustExec("drop placement policy if exists x")
tk.MustExec("drop placement policy if exists y")
}()
// special constraints may be incompatible with common constraint.
_, err := tk.Exec("create placement policy pn " +
"FOLLOWERS=2 " +
"FOLLOWER_CONSTRAINTS=\"[+zone=cn-east-1]\" " +
"CONSTRAINTS=\"[+disk=ssd,-zone=cn-east-1]\"")
require.Error(t, err)
require.Regexp(t, ".*conflicting label constraints.*", err.Error())
// Only placement policy should check the policy existence.
tk.MustGetErrCode("create table t(a int)"+
"PLACEMENT POLICY=\"x\"", mysql.ErrPlacementPolicyNotExists)
tk.MustExec("create placement policy x " +
"FOLLOWERS=2 " +
"CONSTRAINTS=\"[+disk=ssd]\" ")
tk.MustExec("create placement policy y " +
"FOLLOWERS=3 " +
"CONSTRAINTS=\"[+region=bj]\" ")
tk.MustExec("create table t(a int)" +
"PLACEMENT POLICY=\"x\"")
tk.MustQuery("SELECT TABLE_CATALOG, TABLE_SCHEMA, TABLE_NAME, TIDB_PLACEMENT_POLICY_NAME FROM information_schema.Tables WHERE TABLE_SCHEMA='test' AND TABLE_NAME = 't'").Check(testkit.Rows(`def test t x`))
tk.MustExec("create table t_range_p(id int) placement policy x partition by range(id) (" +
"PARTITION p0 VALUES LESS THAN (100)," +
"PARTITION p1 VALUES LESS THAN (1000) placement policy y," +
"PARTITION p2 VALUES LESS THAN (10000))",
)
tk.MustExec("set tidb_enable_list_partition=1")
tk.MustExec("create table t_list_p(name varchar(10)) placement policy x partition by list columns(name) (" +
"PARTITION p0 VALUES IN ('a', 'b')," +
"PARTITION p1 VALUES IN ('c', 'd') placement policy y," +
"PARTITION p2 VALUES IN ('e', 'f'))",
)
tk.MustExec("create table t_hash_p(id int) placement policy x partition by HASH(id) PARTITIONS 4")
policyX := testGetPolicyByName(t, tk.Session(), "x", true)
require.Equal(t, "x", policyX.Name.L)
require.Equal(t, true, policyX.ID != 0)
policyY := testGetPolicyByName(t, tk.Session(), "y", true)
require.Equal(t, "y", policyY.Name.L)
require.Equal(t, true, policyY.ID != 0)
tbl := external.GetTableByName(t, tk, "test", "t")
require.NotNil(t, tbl)
require.NotNil(t, tbl.Meta().PlacementPolicyRef)
require.Equal(t, "x", tbl.Meta().PlacementPolicyRef.Name.L)
require.Equal(t, policyX.ID, tbl.Meta().PlacementPolicyRef.ID)
tk.MustExec("drop table if exists t")
checkPartitionTableFunc := func(tblName string) {
tbl = external.GetTableByName(t, tk, "test", tblName)
require.NotNil(t, tbl)
require.NotNil(t, tbl.Meta().PlacementPolicyRef)
require.Equal(t, "x", tbl.Meta().PlacementPolicyRef.Name.L)
require.Equal(t, policyX.ID, tbl.Meta().PlacementPolicyRef.ID)
require.NotNil(t, tbl.Meta().Partition)
require.Equal(t, 3, len(tbl.Meta().Partition.Definitions))
p0 := tbl.Meta().Partition.Definitions[0]
require.Nil(t, p0.PlacementPolicyRef)
p1 := tbl.Meta().Partition.Definitions[1]
require.NotNil(t, p1.PlacementPolicyRef)
require.Equal(t, "y", p1.PlacementPolicyRef.Name.L)
require.Equal(t, policyY.ID, p1.PlacementPolicyRef.ID)
p2 := tbl.Meta().Partition.Definitions[2]
require.Nil(t, p2.PlacementPolicyRef)
}
checkPartitionTableFunc("t_range_p")
tk.MustExec("drop table if exists t_range_p")
checkPartitionTableFunc("t_list_p")
tk.MustExec("drop table if exists t_list_p")
tbl = external.GetTableByName(t, tk, "test", "t_hash_p")
require.NotNil(t, tbl)
require.NotNil(t, tbl.Meta().PlacementPolicyRef)
require.Equal(t, "x", tbl.Meta().PlacementPolicyRef.Name.L)
require.Equal(t, policyX.ID, tbl.Meta().PlacementPolicyRef.ID)
for _, p := range tbl.Meta().Partition.Definitions {
require.Nil(t, p.PlacementPolicyRef)
}
}
func getClonedTable(dom *domain.Domain, dbName string, tableName string) (*model.TableInfo, error) {
tbl, err := dom.InfoSchema().TableByName(model.NewCIStr(dbName), model.NewCIStr(tableName))
if err != nil {
return nil, err
}
tblMeta := tbl.Meta()
tblMeta = tblMeta.Clone()
policyRef := *tblMeta.PlacementPolicyRef
tblMeta.PlacementPolicyRef = &policyRef
return tblMeta, nil
}
func getClonedDatabase(dom *domain.Domain, dbName string) (*model.DBInfo, bool) {
db, ok := dom.InfoSchema().SchemaByName(model.NewCIStr(dbName))
if !ok {
return nil, ok
}
db = db.Clone()
policyRef := *db.PlacementPolicyRef
db.PlacementPolicyRef = &policyRef
return db, true
}
func TestCreateTableWithInfoPlacement(t *testing.T) {
store, dom, clean := testkit.CreateMockStoreAndDomain(t)
defer clean()
// clearAllBundles(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
tk.MustExec("drop table if exists t1")
tk.MustExec("drop database if exists test2")
tk.MustExec("drop placement policy if exists p1")
tk.MustExec("create placement policy p1 followers=1")
defer tk.MustExec("drop placement policy if exists p1")
tk.MustExec("create table t1(a int) placement policy p1")
defer tk.MustExec("drop table if exists t1")
tk.MustExec("create database test2")
defer tk.MustExec("drop database if exists test2")
tbl, err := getClonedTable(dom, "test", "t1")
require.NoError(t, err)
policy, ok := dom.InfoSchema().PolicyByName(model.NewCIStr("p1"))
require.True(t, ok)
require.Equal(t, policy.ID, tbl.PlacementPolicyRef.ID)
tk.MustExec("alter table t1 placement policy='default'")
tk.MustExec("drop placement policy p1")
tk.MustExec("create placement policy p1 followers=2")
tk.Session().SetValue(sessionctx.QueryString, "skip")
require.Nil(t, dom.DDL().CreateTableWithInfo(tk.Session(), model.NewCIStr("test2"), tbl, ddl.OnExistError))
tk.MustQuery("show create table t1").Check(testkit.Rows("t1 CREATE TABLE `t1` (\n" +
" `a` int(11) DEFAULT NULL\n" +
") ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin"))
tk.MustQuery("show create table test2.t1").Check(testkit.Rows("t1 CREATE TABLE `t1` (\n" +
" `a` int(11) DEFAULT NULL\n" +
") ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin /*T![placement] PLACEMENT POLICY=`p1` */"))
tk.MustQuery("show placement where target='TABLE test2.t1'").Check(testkit.Rows("TABLE test2.t1 FOLLOWERS=2 PENDING"))
// The ref id for new table should be the new policy id
tbl2, err := getClonedTable(dom, "test2", "t1")
require.NoError(t, err)
policy2, ok := dom.InfoSchema().PolicyByName(model.NewCIStr("p1"))
require.True(t, ok)
require.Equal(t, policy2.ID, tbl2.PlacementPolicyRef.ID)
require.True(t, policy2.ID != policy.ID)
// Test policy not exists
tbl2.Name = model.NewCIStr("t3")
tbl2.PlacementPolicyRef.Name = model.NewCIStr("pxx")
tk.Session().SetValue(sessionctx.QueryString, "skip")
err = dom.DDL().CreateTableWithInfo(tk.Session(), model.NewCIStr("test2"), tbl2, ddl.OnExistError)
require.Equal(t, "[schema:8239]Unknown placement policy 'pxx'", err.Error())
}
func TestCreateSchemaWithInfoPlacement(t *testing.T) {
store, dom, clean := testkit.CreateMockStoreAndDomain(t)
defer clean()
// clearAllBundles(t)
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
tk.MustExec("drop database if exists test2")
tk.MustExec("drop database if exists test3")
tk.MustExec("drop placement policy if exists p1")
tk.MustExec("create placement policy p1 followers=1")
defer tk.MustExec("drop placement policy if exists p1")
tk.MustExec("create database test2 placement policy p1")
defer tk.MustExec("drop database if exists test2")
defer tk.MustExec("drop database if exists test3")
db, ok := getClonedDatabase(dom, "test2")
require.True(t, ok)
policy, ok := dom.InfoSchema().PolicyByName(model.NewCIStr("p1"))
require.True(t, ok)
require.Equal(t, policy.ID, db.PlacementPolicyRef.ID)
db2 := db.Clone()
db2.Name = model.NewCIStr("test3")
tk.MustExec("alter database test2 placement policy='default'")
tk.MustExec("drop placement policy p1")
tk.MustExec("create placement policy p1 followers=2")
tk.Session().SetValue(sessionctx.QueryString, "skip")
require.Nil(t, dom.DDL().CreateSchemaWithInfo(tk.Session(), db2, ddl.OnExistError))
tk.MustQuery("show create database test2").Check(testkit.Rows("test2 CREATE DATABASE `test2` /*!40100 DEFAULT CHARACTER SET utf8mb4 */"))
tk.MustQuery("show create database test3").Check(testkit.Rows("test3 CREATE DATABASE `test3` /*!40100 DEFAULT CHARACTER SET utf8mb4 */ /*T![placement] PLACEMENT POLICY=`p1` */"))
tk.MustQuery("show placement where target='DATABASE test3'").Check(testkit.Rows("DATABASE test3 FOLLOWERS=2 SCHEDULED"))
// The ref id for new table should be the new policy id
db2, ok = getClonedDatabase(dom, "test3")
require.True(t, ok)
policy2, ok := dom.InfoSchema().PolicyByName(model.NewCIStr("p1"))
require.True(t, ok)
require.Equal(t, policy2.ID, db2.PlacementPolicyRef.ID)
require.True(t, policy2.ID != policy.ID)
// Test policy not exists
db2.Name = model.NewCIStr("test4")
db2.PlacementPolicyRef.Name = model.NewCIStr("p2")
tk.Session().SetValue(sessionctx.QueryString, "skip")
err := dom.DDL().CreateSchemaWithInfo(tk.Session(), db2, ddl.OnExistError)
require.Equal(t, "[schema:8239]Unknown placement policy 'p2'", err.Error())
}
func TestDropPlacementPolicyInUse(t *testing.T) {
store, clean := testkit.CreateMockStore(t)
defer clean()
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
tk.MustExec("create database if not exists test2")
tk.MustExec("drop table if exists test.t11, test.t12, test2.t21, test2.t21, test2.t22")
tk.MustExec("drop placement policy if exists p1")
tk.MustExec("drop placement policy if exists p2")
tk.MustExec("drop placement policy if exists p3")
tk.MustExec("drop placement policy if exists p4")
// p1 is used by test.t11 and test2.t21
tk.MustExec("create placement policy p1 " +
"PRIMARY_REGION=\"cn-east-1\" " +
"REGIONS=\"cn-east-1, cn-east-2\" " +
"SCHEDULE=\"EVEN\"")
defer tk.MustExec("drop placement policy if exists p1")
tk.MustExec("create table test.t11 (id int) placement policy 'p1'")
defer tk.MustExec("drop table if exists test.t11")
tk.MustExec("create table test2.t21 (id int) placement policy 'p1'")
defer tk.MustExec("drop table if exists test2.t21")
// p1 is used by test.t12
tk.MustExec("create placement policy p2 " +
"PRIMARY_REGION=\"cn-east-1\" " +
"REGIONS=\"cn-east-1, cn-east-2\" " +
"SCHEDULE=\"EVEN\"")
defer tk.MustExec("drop placement policy if exists p2")
tk.MustExec("create table test.t12 (id int) placement policy 'p2'")
defer tk.MustExec("drop table if exists test.t12")
tk.MustQuery("SELECT TABLE_CATALOG, TABLE_SCHEMA, TABLE_NAME, TIDB_PLACEMENT_POLICY_NAME FROM information_schema.Tables WHERE TABLE_SCHEMA='test' AND TABLE_NAME = 't12'").Check(testkit.Rows(`def test t12 p2`))
// p3 is used by test2.t22
tk.MustExec("create placement policy p3 " +
"PRIMARY_REGION=\"cn-east-1\" " +
"REGIONS=\"cn-east-1, cn-east-2\" " +
"SCHEDULE=\"EVEN\"")
defer tk.MustExec("drop placement policy if exists p3")
tk.MustExec("create table test.t21 (id int) placement policy 'p3'")
defer tk.MustExec("drop table if exists test.t21")
// p4 is used by test_p
tk.MustExec("create placement policy p4 " +
"PRIMARY_REGION=\"cn-east-1\" " +
"REGIONS=\"cn-east-1, cn-east-2\" " +
"SCHEDULE=\"EVEN\"")
defer tk.MustExec("drop placement policy if exists p4")
tk.MustExec("create database test_p placement policy 'p4'")
defer tk.MustExec("drop database if exists test_p")
txn, err := store.Begin()
require.NoError(t, err)
defer func() {
require.Nil(t, txn.Rollback())
}()
for _, policyName := range []string{"p1", "p2", "p3", "p4"} {
err := tk.ExecToErr(fmt.Sprintf("drop placement policy %s", policyName))
require.Equal(t, fmt.Sprintf("[ddl:8241]Placement policy '%s' is still in use", policyName), err.Error())
err = tk.ExecToErr(fmt.Sprintf("drop placement policy if exists %s", policyName))
require.Equal(t, fmt.Sprintf("[ddl:8241]Placement policy '%s' is still in use", policyName), err.Error())
}
}
func testGetPolicyByName(t *testing.T, ctx sessionctx.Context, name string, mustExist bool) *model.PolicyInfo {
dom := domain.GetDomain(ctx)
// Make sure the table schema is the new schema.
err := dom.Reload()
require.NoError(t, err)
po, ok := dom.InfoSchema().PolicyByName(model.NewCIStr(name))
if mustExist {
require.Equal(t, true, ok)
}
return po
}
func testGetPolicyDependency(storage kv.Storage, name string) []int64 {
ids := make([]int64, 0, 32)
err1 := kv.RunInNewTxn(context.Background(), storage, false, func(ctx context.Context, txn kv.Transaction) error {
t := meta.NewMeta(txn)
dbs, err := t.ListDatabases()
if err != nil {
return err
}
for _, db := range dbs {
tbls, err := t.ListTables(db.ID)
if err != nil {
return err
}
for _, tbl := range tbls {
if tbl.PlacementPolicyRef != nil && tbl.PlacementPolicyRef.Name.L == name {
ids = append(ids, tbl.ID)
}
}
}
return nil
})
if err1 != nil {
return []int64{}
}
return ids
}
func TestPolicyCacheAndPolicyDependency(t *testing.T) {
store, clean := testkit.CreateMockStore(t)
defer clean()
tk := testkit.NewTestKit(t, store)
tk.MustExec("use test")
tk.MustExec("drop placement policy if exists x")
// Test policy cache.
tk.MustExec("create placement policy x primary_region=\"r1\" regions=\"r1,r2\" schedule=\"EVEN\";")
po := testGetPolicyByName(t, tk.Session(), "x", true)
require.NotNil(t, po)
tk.MustQuery("show placement where target='POLICY x'").Check(testkit.Rows("POLICY x PRIMARY_REGION=\"r1\" REGIONS=\"r1,r2\" SCHEDULE=\"EVEN\" NULL"))
tk.MustExec("drop table if exists t")
tk.MustExec("create table t (a int) placement policy \"x\"")
defer tk.MustExec("drop table if exists t")
tk.MustQuery("SELECT TABLE_CATALOG, TABLE_SCHEMA, TABLE_NAME, TABLE_TYPE, TIDB_PLACEMENT_POLICY_NAME FROM information_schema.Tables WHERE TABLE_SCHEMA='test' AND TABLE_NAME = 't'").Check(testkit.Rows(`def test t BASE TABLE x`))
tbl := external.GetTableByName(t, tk, "test", "t")
// Test policy dependency cache.
dependencies := testGetPolicyDependency(store, "x")
require.NotNil(t, dependencies)
require.Equal(t, 1, len(dependencies))
require.Equal(t, tbl.Meta().ID, dependencies[0])
tk.MustExec("drop table if exists t2")
tk.MustExec("create table t2 (a int) placement policy \"x\"")
defer tk.MustExec("drop table if exists t2")
tk.MustQuery("SELECT TABLE_CATALOG, TABLE_SCHEMA, TABLE_NAME, TABLE_TYPE, TIDB_PLACEMENT_POLICY_NAME FROM information_schema.Tables WHERE TABLE_SCHEMA='test' AND TABLE_NAME = 't'").Check(testkit.Rows(`def test t BASE TABLE x`))
tbl2 := external.GetTableByName(t, tk, "test", "t2")
dependencies = testGetPolicyDependency(store, "x")
require.NotNil(t, dependencies)
require.Equal(t, 2, len(dependencies))
in := func() bool {
for _, one := range dependencies {
if one == tbl2.Meta().ID {
return true
}
}
return false
}
require.Equal(t, true, in())
// Test drop policy can't succeed cause there are still some table depend on them.
tk.MustGetErrMsg("drop placement policy x", "[ddl:8241]Placement policy 'x' is still in use")
// Drop depended table t firstly.
tk.MustExec("drop table if exists t")
dependencies = testGetPolicyDependency(store, "x")
require.NotNil(t, dependencies)
require.Equal(t, 1, len(dependencies))
require.Equal(t, tbl2.Meta().ID, dependencies[0])
tk.MustGetErrMsg("drop placement policy x", "[ddl:8241]Placement policy 'x' is still in use")
// Drop depended table t2 secondly.
tk.MustExec("drop table if exists t2")
dependencies = testGetPolicyDependency(store, "x")
require.NotNil(t, dependencies)
require.Equal(t, 0, len(dependencies))
po = testGetPolicyByName(t, tk.Session(), "x", true)
require.NotNil(t, po)
tk.MustExec("drop placement policy x")
po = testGetPolicyByName(t, tk.Session(), "x", false)
require.Nil(t, po)
dependencies = testGetPolicyDependency(store, "x")
require.NotNil(t, dependencies)
require.Equal(t, 0, len(dependencies))
}
func TestAlterTablePartitionWithPlacementPolicy(t *testing.T) {
store, dom, clean := testkit.CreateMockStoreAndDomain(t)
defer clean()
// clearAllBundles(t)
tk := testkit.NewTestKit(t, store)
defer func() {
tk.MustExec("drop table if exists t1")
tk.MustExec("drop placement policy if exists x")
}()
tk.MustExec("use test")
tk.MustExec("drop table if exists t1")
tk.MustExec("drop placement policy if exists x")
// Direct placement option: special constraints may be incompatible with common constraint.
tk.MustExec("create table t1 (c int) PARTITION BY RANGE (c) " +
"(PARTITION p0 VALUES LESS THAN (6)," +
"PARTITION p1 VALUES LESS THAN (11)," +
"PARTITION p2 VALUES LESS THAN (16)," +
"PARTITION p3 VALUES LESS THAN (21));")
defer tk.MustExec("drop table if exists t1")
checkExistTableBundlesInPD(t, dom, "test", "t1")
// Only placement policy should check the policy existence.
tk.MustGetErrCode("alter table t1 partition p0 "+
"PLACEMENT POLICY=\"x\"", mysql.ErrPlacementPolicyNotExists)
tk.MustExec("create placement policy x " +
"FOLLOWERS=2 ")
tk.MustExec("alter table t1 partition p0 " +
"PLACEMENT POLICY=\"x\"")