Skip to content

Latest commit

 

History

History
83 lines (60 loc) · 2.83 KB

sql-statement-show-stats-meta.md

File metadata and controls

83 lines (60 loc) · 2.83 KB
Raw
title summary aliases
SHOW STATS_META
An overview of the usage of SHOW STATS_META for TiDB database.
/docs/dev/sql-statements/sql-statement-show-stats-meta/

SHOW STATS_META

You can use SHOW STATS_META to view how many rows are in a table and how many rows are changed in that table. When using this statement, you can filter the needed information by the ShowLikeOrWhere clause.

Currently, the SHOW STATS_META statement outputs 6 columns:

Column name Description
db_name Database name
table_name Table name
partition_name Partition name
update_time Last updated time
modify_count The number of rows modified
row_count The total row count

Note:

The update_time is updated when TiDB updates the modify_count and row_count fields according to DML statements. So update_time is not the last execution time of the ANALYZE statement.

Synopsis

ShowStmt

ShowStmt

ShowTargetFiltertable

ShowTargetFilterable

ShowLikeOrWhereOpt

ShowLikeOrWhereOpt

Examples

{{< copyable "sql" >}}

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)

{{< copyable "sql" >}}

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

This statement is a TiDB extension to MySQL syntax.

See also