SHOW STATS_META
你可以使用 SHOW STATS_META 来查看一个表中的行数以及该表中被修改的行数。在使用此语句时，可以通过 ShowLikeOrWhere 子句过滤所需的信息。
目前，SHOW STATS_META 语句输出 6 列：
| Column name | Description |
|---|---|
| db_name | 数据库名称 |
| table_name | 表名称 |
| partition_name | 分区名称 |
| update_time | 最后更新时间 |
| modify_count | 被修改的行数 |
| row_count | 总行数 |
Synopsis
- ShowStatsMetaStmt
- ShowLikeOrWhere
ShowStatsMetaStmt ::=
"SHOW" "STATS_META" ShowLikeOrWhere?
ShowLikeOrWhere ::=
"LIKE" SimpleExpr
| "WHERE" Expression
Examples
SHOW STATS_META;
+---------+------------+----------------+---------------------+--------------+-----------+
| Db_name | Table_name | Partition_name | Update_time | Modify_count | Row_count |
+---------+------------+----------------+---------------------+--------------+-----------+
| test | t0 | | 2020-05-15 16:58:00 | 0 | 0 |
| test | t1 | | 2020-05-15 16:58:04 | 0 | 0 |
| test | t2 | | 2020-05-15 16:58:11 | 0 | 0 |
| test | s | | 2020-05-22 19:46:43 | 0 | 0 |
| test | t | | 2020-05-25 12:04:21 | 0 | 0 |
+---------+------------+----------------+---------------------+--------------+-----------+
5 rows in set (0.00 sec)
SHOW STATS_META WHERE table_name = 't2';
+---------+------------+----------------+---------------------+--------------+-----------+
| Db_name | Table_name | Partition_name | Update_time | Modify_count | Row_count |
+---------+------------+----------------+---------------------+--------------+-----------+
| test | t2 | | 2020-05-15 16:58:11 | 0 | 0 |
+---------+------------+----------------+---------------------+--------------+-----------+
1 row in set (0.00 sec)
MySQL compatibility
此语句是 TiDB 对 MySQL 语法的扩展。