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session: enable foreign_key_checks/tidb_enable_foreign_key by def…
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…ault when upgrade (#41424)
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@crazycs520 @ti-chi-bot
crazycs520 authored and ti-chi-bot committed Feb 15, 2023
1 parent e07fc7f commit 8773bb7
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Showing 2 changed files with 152 additions and 1 deletion.
20 changes: 19 additions & 1 deletion session/bootstrap.go
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Original file line number Diff line number Diff line change
Expand Up @@ -794,11 +794,16 @@ const (
version111 = 111
// version112 modifies the view tidb_mdl_view
version112 = 112
// version113 modifies the following global variables default value:
// - foreign_key_checks: off -> on
// - tidb_enable_foreign_key: off -> on
// - tidb_store_batch_size: 0 -> 4
version113 = 113
)

// currentBootstrapVersion is defined as a variable, so we can modify its value for testing.
// please make sure this is the largest version
var currentBootstrapVersion int64 = version112
var currentBootstrapVersion int64 = version113

// DDL owner key's expired time is ManagerSessionTTL seconds, we should wait the time and give more time to have a chance to finish it.
var internalSQLTimeout = owner.ManagerSessionTTL + 15
Expand Down Expand Up @@ -918,6 +923,7 @@ var (
upgradeToVer110,
upgradeToVer111,
upgradeToVer112,
upgradeToVer113,
}
)

Expand Down Expand Up @@ -2285,6 +2291,18 @@ func upgradeToVer112(s Session, ver int64) {
doReentrantDDL(s, CreateMDLView)
}

func upgradeToVer113(s Session, ver int64) {
if ver >= version113 {
return
}

mustExecute(s, "REPLACE HIGH_PRIORITY INTO %n.%n VALUES (%?, %?);", mysql.SystemDB, mysql.GlobalVariablesTable, variable.ForeignKeyChecks, variable.On)
mustExecute(s, "REPLACE HIGH_PRIORITY INTO %n.%n VALUES (%?, %?);", mysql.SystemDB, mysql.GlobalVariablesTable, variable.TiDBEnableForeignKey, variable.On)
mustExecute(s, "REPLACE HIGH_PRIORITY INTO %n.%n VALUES (%?, %?);", mysql.SystemDB, mysql.GlobalVariablesTable, variable.TiDBEnableHistoricalStats, variable.On)
mustExecute(s, "REPLACE HIGH_PRIORITY INTO %n.%n VALUES (%?, %?);", mysql.SystemDB, mysql.GlobalVariablesTable, variable.TiDBEnablePlanReplayerCapture, variable.On)
mustExecute(s, "UPDATE HIGH_PRIORITY %n.%n SET VARIABLE_VALUE = %? WHERE VARIABLE_NAME = %? AND VARIABLE_VALUE = %?;", mysql.SystemDB, mysql.GlobalVariablesTable, "4", variable.TiDBStoreBatchSize, "0")
}

func writeOOMAction(s Session) {
comment := "oom-action is `log` by default in v3.0.x, `cancel` by default in v4.0.11+"
mustExecute(s, `INSERT HIGH_PRIORITY INTO %n.%n VALUES (%?, %?, %?) ON DUPLICATE KEY UPDATE VARIABLE_VALUE= %?`,
Expand Down
133 changes: 133 additions & 0 deletions session/bootstrap_test.go
View file
Original file line number Diff line number Diff line change
Expand Up @@ -1417,3 +1417,136 @@ func TestTiDBGCAwareUpgradeFrom630To650(t *testing.T) {
require.Equal(t, 2, row.Len())
require.Equal(t, "0", row.GetString(1))
}

func TestTiDBGlobalVariablesDefaultValueUpgradeFrom630To660(t *testing.T) {
ctx := context.Background()
store, _ := createStoreAndBootstrap(t)
defer func() { require.NoError(t, store.Close()) }()

// upgrade from 6.3.0 to 6.6.0.
ver630 := version93
seV630 := createSessionAndSetID(t, store)
txn, err := store.Begin()
require.NoError(t, err)
m := meta.NewMeta(txn)
err = m.FinishBootstrap(int64(ver630))
require.NoError(t, err)
err = txn.Commit(context.Background())
require.NoError(t, err)
mustExec(t, seV630, fmt.Sprintf("update mysql.tidb set variable_value=%d where variable_name='tidb_server_version'", ver630))
mustExec(t, seV630, fmt.Sprintf("update mysql.GLOBAL_VARIABLES set variable_value='%s' where variable_name='%s'", "OFF", variable.TiDBEnableForeignKey))
mustExec(t, seV630, fmt.Sprintf("update mysql.GLOBAL_VARIABLES set variable_value='%s' where variable_name='%s'", "OFF", variable.ForeignKeyChecks))
mustExec(t, seV630, fmt.Sprintf("update mysql.GLOBAL_VARIABLES set variable_value='%s' where variable_name='%s'", "OFF", variable.TiDBEnableHistoricalStats))
mustExec(t, seV630, fmt.Sprintf("update mysql.GLOBAL_VARIABLES set variable_value='%s' where variable_name='%s'", "OFF", variable.TiDBEnablePlanReplayerCapture))
mustExec(t, seV630, "commit")
unsetStoreBootstrapped(store.UUID())
ver, err := getBootstrapVersion(seV630)
require.NoError(t, err)
require.Equal(t, int64(ver630), ver)

// We are now in 6.3.0.
upgradeVars := []string{variable.TiDBEnableForeignKey, variable.ForeignKeyChecks, variable.TiDBEnableHistoricalStats, variable.TiDBEnablePlanReplayerCapture}
varsValueList := []string{"OFF", "OFF", "OFF", "OFF"}
for i := range upgradeVars {
res := mustExecToRecodeSet(t, seV630, fmt.Sprintf("select * from mysql.GLOBAL_VARIABLES where variable_name='%s'", upgradeVars[i]))
chk := res.NewChunk(nil)
err = res.Next(ctx, chk)
require.NoError(t, err)
require.Equal(t, 1, chk.NumRows())
row := chk.GetRow(0)
require.Equal(t, 2, row.Len())
require.Equal(t, varsValueList[i], row.GetString(1))
}

// Upgrade to 6.6.0.
domCurVer, err := BootstrapSession(store)
require.NoError(t, err)
defer domCurVer.Close()
seV660 := createSessionAndSetID(t, store)
ver, err = getBootstrapVersion(seV660)
require.NoError(t, err)
require.Equal(t, currentBootstrapVersion, ver)

// We are now in 6.6.0.
varsValueList = []string{"ON", "ON", "ON", "ON"}
for i := range upgradeVars {
res := mustExecToRecodeSet(t, seV660, fmt.Sprintf("select * from mysql.GLOBAL_VARIABLES where variable_name='%s'", upgradeVars[i]))
chk := res.NewChunk(nil)
err = res.Next(ctx, chk)
require.NoError(t, err)
require.Equal(t, 1, chk.NumRows())
row := chk.GetRow(0)
require.Equal(t, 2, row.Len())
require.Equal(t, varsValueList[i], row.GetString(1))
}
}

func TestTiDBStoreBatchSizeUpgradeFrom650To660(t *testing.T) {
for i := 0; i < 2; i++ {
func() {
ctx := context.Background()
store, dom := createStoreAndBootstrap(t)
defer func() { require.NoError(t, store.Close()) }()

// upgrade from 6.5 to 6.6.
ver65 := version112
seV65 := createSessionAndSetID(t, store)
txn, err := store.Begin()
require.NoError(t, err)
m := meta.NewMeta(txn)
err = m.FinishBootstrap(int64(ver65))
require.NoError(t, err)
err = txn.Commit(context.Background())
require.NoError(t, err)
mustExec(t, seV65, fmt.Sprintf("update mysql.tidb set variable_value=%d where variable_name='tidb_server_version'", ver65))
mustExec(t, seV65, fmt.Sprintf("update mysql.GLOBAL_VARIABLES set variable_value='%s' where variable_name='%s'", "0", variable.TiDBStoreBatchSize))
mustExec(t, seV65, "commit")
unsetStoreBootstrapped(store.UUID())
ver, err := getBootstrapVersion(seV65)
require.NoError(t, err)
require.Equal(t, int64(ver65), ver)

// We are now in 6.5, tidb_store_batch_size is 0.
res := mustExecToRecodeSet(t, seV65, fmt.Sprintf("select * from mysql.GLOBAL_VARIABLES where variable_name='%s'", variable.TiDBStoreBatchSize))
chk := res.NewChunk(nil)
err = res.Next(ctx, chk)
require.NoError(t, err)
require.Equal(t, 1, chk.NumRows())
row := chk.GetRow(0)
require.Equal(t, 2, row.Len())
require.Equal(t, "0", row.GetString(1))
res.Close()

if i == 0 {
// For the first time, We set tidb_store_batch_size to 1.
// And after upgrade to 6.6, tidb_store_batch_size should be 1.
// For the second it should be the latest default value.
mustExec(t, seV65, "set global tidb_store_batch_size = 1")
}
dom.Close()
// Upgrade to 6.6.
domCurVer, err := BootstrapSession(store)
require.NoError(t, err)
defer domCurVer.Close()
seCurVer := createSessionAndSetID(t, store)
ver, err = getBootstrapVersion(seCurVer)
require.NoError(t, err)
require.Equal(t, currentBootstrapVersion, ver)

// We are now in 6.6.
res = mustExecToRecodeSet(t, seCurVer, "select @@tidb_store_batch_size")
chk = res.NewChunk(nil)
err = res.Next(ctx, chk)
require.NoError(t, err)
require.Equal(t, 1, chk.NumRows())
row = chk.GetRow(0)
require.Equal(t, 1, row.Len())
if i == 0 {
require.Equal(t, "1", row.GetString(0))
} else {
require.Equal(t, "4", row.GetString(0))
}
res.Close()
}()
}
}

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