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information-schema-analyze-status.md

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ANALYZE_STATUS
了解 information_schema 表 `ANALYZE_STATUS`。

ANALYZE_STATUS

ANALYZE_STATUS 表提供正在执行的收集统计信息的任务以及有限条历史任务记录。

{{< copyable "sql" >}}

USE information_schema;
DESC analyze_status;
+----------------+---------------------+------+------+---------+-------+
| Field          | Type                | Null | Key  | Default | Extra |
+----------------+---------------------+------+------+---------+-------+
| TABLE_SCHEMA   | varchar(64)         | YES  |      | NULL    |       |
| TABLE_NAME     | varchar(64)         | YES  |      | NULL    |       |
| PARTITION_NAME | varchar(64)         | YES  |      | NULL    |       |
| JOB_INFO       | varchar(64)         | YES  |      | NULL    |       |
| PROCESSED_ROWS | bigint(20) unsigned | YES  |      | NULL    |       |
| START_TIME     | datetime            | YES  |      | NULL    |       |
| STATE          | varchar(64)         | YES  |      | NULL    |       |
+----------------+---------------------+------+------+---------+-------+
7 rows in set (0.00 sec)

{{< copyable "sql" >}}

SELECT * FROM `ANALYZE_STATUS`;
+--------------+------------+----------------+-------------------+----------------+---------------------+----------+
| TABLE_SCHEMA | TABLE_NAME | PARTITION_NAME | JOB_INFO          | PROCESSED_ROWS | START_TIME          | STATE    |
+--------------+------------+----------------+-------------------+----------------+---------------------+----------+
| test         | t          |                | analyze index idx | 2              | 2019-06-21 19:51:14 | finished |
| test         | t          |                | analyze columns   | 2              | 2019-06-21 19:51:14 | finished |
| test         | t1         | p0             | analyze columns   | 0              | 2019-06-21 19:51:15 | finished |
| test         | t1         | p3             | analyze columns   | 0              | 2019-06-21 19:51:15 | finished |
| test         | t1         | p1             | analyze columns   | 0              | 2019-06-21 19:51:15 | finished |
| test         | t1         | p2             | analyze columns   | 1              | 2019-06-21 19:51:15 | finished |
+--------------+------------+----------------+-------------------+----------------+---------------------+----------+
6 rows in set

ANALYZE_STATUS 表中列的含义如下：

  • TABLE_SCHEMA：表所属的数据库的名称。
  • TABLE_NAME：表的名称。
  • PARTITION_NAME：分区表的名称。
  • JOB_INFO：ANALYZE 任务的信息。
  • PROCESSED_ROWS：已经处理的行数。
  • START_TIME：ANALYZE 任务的开始时间。
  • STATE：ANALYZE 任务的执行状态。其值可以是 pending、running、finished 或者 failed。