ttl: add system table for TTL status

executor/infoschema_cluster_table_test.go

@@ -290,7 +290,7 @@ func TestTableStorageStats(t *testing.T) {
 		"test 2",
 	))
 	rows := tk.MustQuery("select TABLE_NAME from information_schema.TABLE_STORAGE_STATS where TABLE_SCHEMA = 'mysql';").Rows()
-	result := 41
+	result := 42
 	require.Len(t, rows, result)
 
 	// More tests about the privileges.

session/bootstrap.go

@@ -476,6 +476,26 @@ const (
          Password text,
          PRIMARY KEY (Host,User,Password_timestamp )
         ) COMMENT='Password history for user accounts' `
+
+	// CreateTTLTableStatus is a table about TTL task schedule
+	CreateTTLTableStatus = `CREATE TABLE IF NOT EXISTS mysql.tidb_ttl_table_status (
+		table_id bigint(64) PRIMARY KEY,
+        parent_table_id bigint(64),
+        table_statistics text DEFAULT NULL,
+		last_job_id varchar(64) DEFAULT NULL,
+		last_job_start_time timestamp NULL DEFAULT NULL,
+		last_job_finish_time timestamp NULL DEFAULT NULL,
+		last_job_ttl_expire timestamp NULL DEFAULT NULL,
+        last_job_summary text DEFAULT NULL,
+		current_job_id varchar(64) DEFAULT NULL,
+		current_job_owner_id varchar(64) DEFAULT NULL,
+		current_job_owner_addr varchar(256) DEFAULT NULL,
+		current_job_owner_hb_time timestamp,
+		current_job_start_time timestamp NULL DEFAULT NULL,
+		current_job_ttl_expire timestamp NULL DEFAULT NULL,
+		current_job_state text DEFAULT NULL,
+		current_job_status varchar(64) DEFAULT NULL,
+  		current_job_status_update_time timestamp NULL DEFAULT NULL);`
 )
 
 // bootstrap initiates system DB for a store.
@@ -710,6 +730,8 @@ const (
 	version106 = 106
 	// version107 add columns related to password expiration into mysql.user
 	version107 = 107
+	// version107 adds the table tidb_ttl_table_status
+	version108 = 108
 )
 
 // currentBootstrapVersion is defined as a variable, so we can modify its value for testing.
@@ -826,6 +848,7 @@ var (
 		upgradeToVer105,
 		upgradeToVer106,
 		upgradeToVer107,
+		upgradeToVer108,
 	}
 )
 
@@ -2160,6 +2183,13 @@ func upgradeToVer107(s Session, ver int64) {
 		"ADD COLUMN IF NOT EXISTS `Password_lifetime` SMALLINT UNSIGNED DEFAULT NULL")
 }
 
+func upgradeToVer108(s Session, ver int64) {
+	if ver >= version108 {
+		return
+	}
+	doReentrantDDL(s, CreateTTLTableStatus)
+}
+
 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= %?`,
@@ -2264,6 +2294,8 @@ func doDDLWorks(s Session) {
 	mustExecute(s, CreatePlanReplayerTaskTable)
 	// Create stats_meta_table_locked table
 	mustExecute(s, CreateStatsTableLocked)
+	// Create tidb_ttl_table_status table
+	mustExecute(s, CreateTTLTableStatus)
 }
 
 // inTestSuite checks if we are bootstrapping in the context of tests.

session/bootstrap_test.go

@@ -216,6 +216,9 @@ func TestBootstrapWithError(t *testing.T) {
 	require.Equal(t, 1, row.Len())
 	require.Equal(t, []byte("True"), row.GetBytes(0))
 	require.NoError(t, r.Close())
+
+	// Check tidb_ttl_table_status table
+	mustExec(t, se, "SELECT * from mysql.tidb_ttl_table_status").Close()
 }
 
 // TestUpgrade tests upgrading