DDL_JOBS

DDL_JOBS 表为 ADMIN SHOW DDL JOBS 命令提供了一个 INFORMATION_SCHEMA 接口。它提供了 TiDB 集群中 DDL 操作的当前状态和简短历史记录。

1. USE information_schema;
2. DESC ddl_jobs;

1. +--------------+-------------+------+------+---------+-------+
2. | Field        | Type        | Null | Key  | Default | Extra |
3. +--------------+-------------+------+------+---------+-------+
4. | JOB_ID       | bigint(21)  | YES  |      | NULL    |       |
5. | DB_NAME      | varchar(64) | YES  |      | NULL    |       |
6. | TABLE_NAME   | varchar(64) | YES  |      | NULL    |       |
7. | JOB_TYPE     | varchar(64) | YES  |      | NULL    |       |
8. | SCHEMA_STATE | varchar(64) | YES  |      | NULL    |       |
9. | SCHEMA_ID    | bigint(21)  | YES  |      | NULL    |       |
10. | TABLE_ID     | bigint(21)  | YES  |      | NULL    |       |
11. | ROW_COUNT    | bigint(21)  | YES  |      | NULL    |       |
12. | START_TIME   | datetime    | YES  |      | NULL    |       |
13. | END_TIME     | datetime    | YES  |      | NULL    |       |
14. | STATE        | varchar(64) | YES  |      | NULL    |       |
15. | QUERY        | varchar(64) | YES  |      | NULL    |       |
16. +--------------+-------------+------+------+---------+-------+
17. 12 rows in set (0.00 sec)

1. SELECT * FROM ddl_jobs LIMIT 3\G

1. *************************** 1. row ***************************
2. JOB_ID: 44
3. DB_NAME: mysql
4. TABLE_NAME: opt_rule_blacklist
5. JOB_TYPE: create table
6. SCHEMA_STATE: public
7. SCHEMA_ID: 3
8. TABLE_ID: 43
9. ROW_COUNT: 0
10. START_TIME: 2020-07-06 15:24:27
11. END_TIME: 2020-07-06 15:24:27
12. STATE: synced
13. QUERY: CREATE TABLE IF NOT EXISTS mysql.opt_rule_blacklist (
14. name char(100) NOT NULL
15. );
16. *************************** 2. row ***************************
17. JOB_ID: 42
18. DB_NAME: mysql
19. TABLE_NAME: expr_pushdown_blacklist
20. JOB_TYPE: create table
21. SCHEMA_STATE: public
22. SCHEMA_ID: 3
23. TABLE_ID: 41
24. ROW_COUNT: 0
25. START_TIME: 2020-07-06 15:24:27
26. END_TIME: 2020-07-06 15:24:27
27. STATE: synced
28. QUERY: CREATE TABLE IF NOT EXISTS mysql.expr_pushdown_blacklist (
29. name char(100) NOT NULL,
30. store_type char(100) NOT NULL DEFAULT 'tikv,tiflash,tidb',
31. reason varchar(200)
32. );
33. *************************** 3. row ***************************
34. JOB_ID: 40
35. DB_NAME: mysql
36. TABLE_NAME: stats_top_n
37. JOB_TYPE: create table
38. SCHEMA_STATE: public
39. SCHEMA_ID: 3
40. TABLE_ID: 39
41. ROW_COUNT: 0
42. START_TIME: 2020-07-06 15:24:26
43. END_TIME: 2020-07-06 15:24:27
44. STATE: synced
45. QUERY: CREATE TABLE if not exists mysql.stats_top_n (
46. table_id bigint(64) NOT NULL,
47. is_index tinyint(2) NOT NULL,
48. hist_id bigint(64) NOT NULL,
49. value longblob,
50. count bigint(64) UNSIGNED NOT NULL,
51. index tbl(table_id, is_index, hist_id)
52. );
53. 3 rows in set (0.01 sec)