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schema_validator_test.go
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// Copyright 2016 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 domain
import (
"testing"
"time"
"github.com/pingcap/tidb/sessionctx/variable"
"github.com/pingcap/tidb/util"
"github.com/stretchr/testify/require"
"github.com/tikv/client-go/v2/oracle"
"github.com/tikv/client-go/v2/txnkv/transaction"
)
func TestSchemaValidator(t *testing.T) {
t.Run("general", subTestSchemaValidatorGeneral)
t.Run("enqueue", subTestEnqueue)
t.Run("enqueueActionType", subTestEnqueueActionType)
}
// subTestSchemaValidatorGeneral is batched in TestSchemaValidator
func subTestSchemaValidatorGeneral(t *testing.T) {
lease := 10 * time.Millisecond
leaseGrantCh := make(chan leaseGrantItem)
exit := make(chan struct{})
var wg util.WaitGroupWrapper
wg.Run(func() { serverFunc(leaseGrantCh, exit) })
validator := NewSchemaValidator(lease, nil).(*schemaValidator)
require.True(t, validator.IsStarted())
for i := 0; i < 3; i++ {
// Reload can run arbitrarily, at any time.
item := <-leaseGrantCh
validator.Update(item.leaseGrantTS, item.oldVer, item.schemaVer, nil)
}
// Take a lease, check it's valid.
item := <-leaseGrantCh
validator.Update(
item.leaseGrantTS,
item.oldVer,
item.schemaVer,
&transaction.RelatedSchemaChange{PhyTblIDS: []int64{10}, ActionTypes: []uint64{10}})
_, valid := validator.Check(item.leaseGrantTS, item.schemaVer, []int64{10}, true)
require.Equal(t, ResultSucc, valid)
// Stop the validator, validator's items value is nil.
validator.Stop()
require.False(t, validator.IsStarted())
_, isTablesChanged := validator.isRelatedTablesChanged(item.schemaVer, []int64{10})
require.True(t, isTablesChanged)
_, valid = validator.Check(item.leaseGrantTS, item.schemaVer, []int64{10}, true)
require.Equal(t, ResultUnknown, valid)
validator.Restart()
// Increase the current time by 2 leases, check schema is invalid.
after2LeaseTime := time.Now().Add(2 * lease)
ts := uint64(after2LeaseTime.UnixNano()) // Make sure that ts has timed out a lease.
_, valid = validator.Check(ts, item.schemaVer, []int64{10}, true)
require.Equalf(t, ResultUnknown, valid, "validator latest schema ver %v, time %v, item schema ver %v, ts %v", validator.latestSchemaVer, validator.latestSchemaExpire, 0, oracle.GetTimeFromTS(ts))
// Make sure newItem's version is greater than item.schema.
newItem := getGreaterVersionItem(t, leaseGrantCh, item.schemaVer)
currVer := newItem.schemaVer
validator.Update(newItem.leaseGrantTS, newItem.oldVer, currVer, nil)
_, valid = validator.Check(ts, item.schemaVer, nil, true)
require.Equalf(t, ResultFail, valid, "currVer %d, newItem %v", currVer, item)
_, valid = validator.Check(ts, item.schemaVer, []int64{0}, true)
require.Equalf(t, ResultFail, valid, "currVer %d, newItem %v", currVer, item)
// Check the latest schema version must changed.
require.Less(t, item.schemaVer, validator.latestSchemaVer)
// Make sure newItem's version is greater than currVer.
newItem = getGreaterVersionItem(t, leaseGrantCh, currVer)
// Update current schema version to newItem's version and the delta table IDs is 1, 2, 3.
validator.Update(ts, currVer, newItem.schemaVer, &transaction.RelatedSchemaChange{PhyTblIDS: []int64{1, 2, 3}, ActionTypes: []uint64{1, 2, 3}})
// Make sure the updated table IDs don't be covered with the same schema version.
validator.Update(ts, newItem.schemaVer, newItem.schemaVer, nil)
_, isTablesChanged = validator.isRelatedTablesChanged(currVer, nil)
require.False(t, isTablesChanged)
_, isTablesChanged = validator.isRelatedTablesChanged(currVer, []int64{2})
require.Truef(t, isTablesChanged, "currVer %d, newItem %v", currVer, newItem)
// The current schema version is older than the oldest schema version.
_, isTablesChanged = validator.isRelatedTablesChanged(-1, nil)
require.Truef(t, isTablesChanged, "currVer %d, newItem %v", currVer, newItem)
// All schema versions is expired.
ts = uint64(after2LeaseTime.Add(2 * lease).UnixNano())
_, valid = validator.Check(ts, newItem.schemaVer, nil, true)
require.Equal(t, ResultUnknown, valid, "schemaVer %v, validator %#v", newItem.schemaVer, validator)
close(exit)
wg.Wait()
}
// subTestEnqueue is batched in TestSchemaValidator
func subTestEnqueue(t *testing.T) {
lease := 10 * time.Millisecond
originalCnt := variable.GetMaxDeltaSchemaCount()
defer variable.SetMaxDeltaSchemaCount(originalCnt)
validator := NewSchemaValidator(lease, nil).(*schemaValidator)
require.True(t, validator.IsStarted())
// maxCnt is 0.
variable.SetMaxDeltaSchemaCount(0)
validator.enqueue(1, &transaction.RelatedSchemaChange{PhyTblIDS: []int64{11}, ActionTypes: []uint64{11}})
require.Len(t, validator.deltaSchemaInfos, 0)
// maxCnt is 10.
variable.SetMaxDeltaSchemaCount(10)
ds := []deltaSchemaInfo{
{0, []int64{1}, []uint64{1}},
{1, []int64{1}, []uint64{1}},
{2, []int64{1}, []uint64{1}},
{3, []int64{2, 2}, []uint64{2, 2}},
{4, []int64{2}, []uint64{2}},
{5, []int64{1, 4}, []uint64{1, 4}},
{6, []int64{1, 4}, []uint64{1, 4}},
{7, []int64{3, 1, 3}, []uint64{3, 1, 3}},
{8, []int64{1, 2, 3}, []uint64{1, 2, 3}},
{9, []int64{1, 2, 3}, []uint64{1, 2, 3}},
}
for _, d := range ds {
validator.enqueue(d.schemaVersion, &transaction.RelatedSchemaChange{PhyTblIDS: d.relatedIDs, ActionTypes: d.relatedActions})
}
validator.enqueue(10, &transaction.RelatedSchemaChange{PhyTblIDS: []int64{1}, ActionTypes: []uint64{1}})
ret := []deltaSchemaInfo{
{0, []int64{1}, []uint64{1}},
{2, []int64{1}, []uint64{1}},
{3, []int64{2, 2}, []uint64{2, 2}},
{4, []int64{2}, []uint64{2}},
{6, []int64{1, 4}, []uint64{1, 4}},
{9, []int64{1, 2, 3}, []uint64{1, 2, 3}},
{10, []int64{1}, []uint64{1}},
}
require.Equal(t, ret, validator.deltaSchemaInfos)
// The Items' relatedTableIDs have different order.
validator.enqueue(11, &transaction.RelatedSchemaChange{PhyTblIDS: []int64{1, 2, 3, 4}, ActionTypes: []uint64{1, 2, 3, 4}})
validator.enqueue(12, &transaction.RelatedSchemaChange{PhyTblIDS: []int64{4, 1, 2, 3, 1}, ActionTypes: []uint64{4, 1, 2, 3, 1}})
validator.enqueue(13, &transaction.RelatedSchemaChange{PhyTblIDS: []int64{4, 1, 3, 2, 5}, ActionTypes: []uint64{4, 1, 3, 2, 5}})
ret[len(ret)-1] = deltaSchemaInfo{13, []int64{4, 1, 3, 2, 5}, []uint64{4, 1, 3, 2, 5}}
require.Equal(t, ret, validator.deltaSchemaInfos)
// The length of deltaSchemaInfos is greater then maxCnt.
validator.enqueue(14, &transaction.RelatedSchemaChange{PhyTblIDS: []int64{1}, ActionTypes: []uint64{1}})
validator.enqueue(15, &transaction.RelatedSchemaChange{PhyTblIDS: []int64{2}, ActionTypes: []uint64{2}})
validator.enqueue(16, &transaction.RelatedSchemaChange{PhyTblIDS: []int64{3}, ActionTypes: []uint64{3}})
validator.enqueue(17, &transaction.RelatedSchemaChange{PhyTblIDS: []int64{4}, ActionTypes: []uint64{4}})
ret = append(ret, deltaSchemaInfo{14, []int64{1}, []uint64{1}})
ret = append(ret, deltaSchemaInfo{15, []int64{2}, []uint64{2}})
ret = append(ret, deltaSchemaInfo{16, []int64{3}, []uint64{3}})
ret = append(ret, deltaSchemaInfo{17, []int64{4}, []uint64{4}})
require.Equal(t, ret[1:], validator.deltaSchemaInfos)
}
// subTestEnqueueActionType is batched in TestSchemaValidator
func subTestEnqueueActionType(t *testing.T) {
lease := 10 * time.Millisecond
originalCnt := variable.GetMaxDeltaSchemaCount()
defer variable.SetMaxDeltaSchemaCount(originalCnt)
validator := NewSchemaValidator(lease, nil).(*schemaValidator)
require.True(t, validator.IsStarted())
// maxCnt is 0.
variable.SetMaxDeltaSchemaCount(0)
validator.enqueue(1, &transaction.RelatedSchemaChange{PhyTblIDS: []int64{11}, ActionTypes: []uint64{11}})
require.Len(t, validator.deltaSchemaInfos, 0)
// maxCnt is 10.
variable.SetMaxDeltaSchemaCount(10)
ds := []deltaSchemaInfo{
{0, []int64{1}, []uint64{1}},
{1, []int64{1}, []uint64{1}},
{2, []int64{1}, []uint64{1}},
{3, []int64{2, 2}, []uint64{2, 2}},
{4, []int64{2}, []uint64{2}},
{5, []int64{1, 4}, []uint64{1, 4}},
{6, []int64{1, 4}, []uint64{1, 4}},
{7, []int64{3, 1, 3}, []uint64{3, 1, 3}},
{8, []int64{1, 2, 3}, []uint64{1, 2, 3}},
{9, []int64{1, 2, 3}, []uint64{1, 2, 4}},
}
for _, d := range ds {
validator.enqueue(d.schemaVersion, &transaction.RelatedSchemaChange{PhyTblIDS: d.relatedIDs, ActionTypes: d.relatedActions})
}
validator.enqueue(10, &transaction.RelatedSchemaChange{PhyTblIDS: []int64{1}, ActionTypes: []uint64{15}})
ret := []deltaSchemaInfo{
{0, []int64{1}, []uint64{1}},
{2, []int64{1}, []uint64{1}},
{3, []int64{2, 2}, []uint64{2, 2}},
{4, []int64{2}, []uint64{2}},
{6, []int64{1, 4}, []uint64{1, 4}},
{8, []int64{1, 2, 3}, []uint64{1, 2, 3}},
{9, []int64{1, 2, 3}, []uint64{1, 2, 4}},
{10, []int64{1}, []uint64{15}},
}
require.Equal(t, ret, validator.deltaSchemaInfos)
// Check the flag set by schema diff, note tableID = 3 has been set flag 0x3 in schema version 9, and flag 0x4
// in schema version 10, so the resActions for tableID = 3 should be 0x3 & 0x4 = 0x7.
relatedChanges, isTablesChanged := validator.isRelatedTablesChanged(5, []int64{1, 2, 3, 4})
require.True(t, isTablesChanged)
require.Equal(t, []int64{1, 2, 3, 4}, relatedChanges.PhyTblIDS)
require.Equal(t, []uint64{15, 2, 7, 4}, relatedChanges.ActionTypes)
}
type leaseGrantItem struct {
leaseGrantTS uint64
oldVer int64
schemaVer int64
}
func getGreaterVersionItem(t *testing.T, leaseGrantCh chan leaseGrantItem, currVer int64) leaseGrantItem {
newItem := <-leaseGrantCh
require.Greaterf(t, newItem.schemaVer, currVer, "currVer %d, newItem %v", currVer, newItem)
return newItem
}
// serverFunc plays the role as a remote server, runs in a separate goroutine.
// It can grant lease and provide timestamp oracle.
// Caller should communicate with it through channel to mock network.
func serverFunc(requireLease chan leaseGrantItem, exit chan struct{}) {
var version int64
leaseTS := uint64(time.Now().UnixNano())
for {
select {
case requireLease <- leaseGrantItem{
leaseGrantTS: leaseTS,
oldVer: version - 1,
schemaVer: version,
}:
version++
leaseTS = uint64(time.Now().UnixNano())
case <-exit:
return
}
}
}