*: Support LOCK/UNLOCK TABLES feature (pingcap#10343)

config/config.go

@@ -97,6 +97,9 @@ type Config struct {
 	TreatOldVersionUTF8AsUTF8MB4 bool        `toml:"treat-old-version-utf8-as-utf8mb4" json:"treat-old-version-utf8-as-utf8mb4"`
 	SplitRegionMaxNum            uint64      `toml:"split-region-max-num" json:"split-region-max-num"`
 	StmtSummary                  StmtSummary `toml:"stmt-summary" json:"stmt-summary"`
+	// EnableTableLock indicate whether enable table lock.
+	// TODO: remove this after table lock features stable.
+	EnableTableLock bool `toml:"enable-table-lock" json:"enable-table-lock"`
 }
 
 // Log is the log section of config.
@@ -354,6 +357,7 @@ var defaultConf = Config{
 	AlterPrimaryKey:              false,
 	TreatOldVersionUTF8AsUTF8MB4: true,
 	SplitRegionMaxNum:            1000,
+	EnableTableLock:              false,
 	TxnLocalLatches: TxnLocalLatches{
 		Enabled:  false,
 		Capacity: 2048000,
@@ -626,6 +630,11 @@ func hasRootPrivilege() bool {
 	return os.Geteuid() == 0
 }
 
+// TableLockEnabled uses to check whether enabled the table lock feature.
+func TableLockEnabled() bool {
+	return GetGlobalConfig().EnableTableLock
+}
+
 // ToLogConfig converts *Log to *logutil.LogConfig.
 func (l *Log) ToLogConfig() *logutil.LogConfig {
 	return logutil.NewLogConfig(l.Level, l.Format, l.SlowQueryFile, l.File, l.DisableTimestamp)

config/config.toml.example

@@ -57,6 +57,7 @@ check-mb4-value-in-utf8 = true
 # treat-old-version-utf8-as-utf8mb4 use for upgrade compatibility. Set to true will treat old version table/column UTF8 charset as UTF8MB4.
 treat-old-version-utf8-as-utf8mb4 = true
 
+<<<<<<< HEAD
 # Maximum number of the splitting region, which is used by the split region statement.
 split-region-max-num = 1000
 
@@ -70,6 +71,10 @@ alter-primary-key = false
 # 2. the server version filled in handshake packets of MySQL Connection Protocol, see https://dev.mysql.com/doc/internals/en/connection-phase-packets.html#packet-Protocol::Handshake for more details.
 # if server-version = "", the default value(original TiDB version string) is used.
 server-version = ""
+=======
+# enable-table-lock is used to control table lock feature. Default is false, indicate the table lock feature is disabled.
+enable-table-lock = false
+>>>>>>> 612936bbd... *: Support LOCK/UNLOCK TABLES feature (#10343)
 
 [log]
 # Log level: debug, info, warn, error, fatal.

config/config_test.go

@@ -67,6 +67,7 @@ token-limit = 0
 alter-primary-key = true
 split-region-max-num=10000
 server-version = "test_version"
+enable-table-lock = true
 [performance]
 txn-entry-count-limit=2000
 txn-total-size-limit=2000
@@ -112,6 +113,7 @@ history-size=100
 	c.Assert(conf.StmtSummary.MaxSQLLength, Equals, uint(1024))
 	c.Assert(conf.StmtSummary.RefreshInterval, Equals, 100)
 	c.Assert(conf.StmtSummary.HistorySize, Equals, 100)
+	c.Assert(conf.EnableTableLock, IsTrue)
 	c.Assert(f.Close(), IsNil)
 	c.Assert(os.Remove(configFile), IsNil)