The index data and table data of the TTL table are inconsistent #56829
Description
Bug Report
Please answer these questions before submitting your issue. Thanks!
1. Minimal reproduce step (Required)
- startup a TiDB cluster;
- create table
cache;
CREATE TABLE `cache` (
`cache_key` varchar(512) NOT NULL,
`cache_value` json NOT NULL,
`created_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP,
`updated_at` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
`expires` int(11) DEFAULT '-1' COMMENT 'cache will expire after n seconds',
`expired_at` datetime GENERATED ALWAYS AS (if(`expires` > 0, date_add(`updated_at`, interval `expires` second), date_add(`updated_at`, interval 99 year))) VIRTUAL,
PRIMARY KEY (`cache_key`) /*T![clustered_index] CLUSTERED */,
KEY `idx_c_on_created_at` (`created_at`),
KEY `idx_c_on_expired_at` (`expired_at`),
KEY `idx_expired_at` (`expired_at`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_bin /*T![ttl] TTL=`expired_at` + INTERVAL 0 DAY */ /*T![ttl] TTL_ENABLE='ON' */ /*T![ttl] TTL_JOB_INTERVAL='15m' */- run the following command
func main() {
// Open a connection to the database.
// Replace the parameters with your own values for the database.
db, err := sql.Open("mysql", "root@tcp(localhost:4000)/test")
if err != nil {
fmt.Println("Error connecting to the database:", err)
return
}
defer db.Close()
for i := 0; i < 1000000; i++ {
dateStr := time.Now().Format("2006-01-02 15:04:05")
sqlStr := fmt.Sprintf("INSERT INTO `cache` (`cache_key`, `cache_value`, `created_at`, `updated_at`, `expires`) VALUES ('%s', '\"%s\"', '%s', '%s', %d) ON DUPLICATE KEY UPDATE expires = expires + 1", dateStr, dateStr, dateStr, dateStr, 60)
_, err = db.Exec(sqlStr)
if err != nil {
panic(err)
}
if i%10 == 0 {
oldTime := time.Now().Add(-time.Minute).Format("2006-01-02 15:04:05")
updateStr := fmt.Sprintf("UPDATE `cache` set `updated_at` = '%s' where `cache_key` = '%s'", dateStr, oldTime)
_, err = db.Exec(updateStr)
if err != nil {
panic(err)
}
}
time.Sleep(500 * time.Millisecond)
}
}- admin check table
cache;
2. What did you expect to see? (Required)
admin check table should be ok.
3. What did you see instead (Required)
4. What is your TiDB version? (Required)
release-7.5