SHOW TABLE STATUS

SHOW TABLE STATUS 语句用于显示 TiDB 中表的各种统计信息。如果显示统计信息过期，建议运行 ANALYZE TABLE。

语法图

ShowStmt:

ShowStmt

ShowTargetFilterable:

ShowTargetFilterable

ShowDatabaseNameOpt:

ShowDatabaseNameOpt

示例

  1. mysql> CREATE TABLE t1 (id INT NOT NULL PRIMARY KEY auto_increment, c1 INT NOT NULL);
  2. Query OK, 0 rows affected (0.11 sec)
  4. mysql> INSERT INTO t1 (c1) VALUES (1),(2),(3),(4),(5);
  5. Query OK, 5 rows affected (0.02 sec)
  6. Records: 5  Duplicates: 0  Warnings: 0
  8. mysql> SHOW TABLE STATUS LIKE 't1'\G
  9. *************************** 1. row ***************************
  10.            Name: t1
  11.          Engine: InnoDB
  12.         Version: 10
  13.      Row_format: Compact
  14.            Rows: 0
  15.  Avg_row_length: 0
  16.     Data_length: 0
  17. Max_data_length: 0
  18.    Index_length: 0
  19.       Data_free: 0
  20.  Auto_increment: 30001
  21.     Create_time: 2019-04-19 08:32:06
  22.     Update_time: NULL
  23.      Check_time: NULL
  24.       Collation: utf8mb4_bin
  25.        Checksum: 
  26.  Create_options: 
  27.         Comment: 
  28. 1 row in set (0.00 sec)
  30. mysql> analyze table t1;
  31. Query OK, 0 rows affected (0.12 sec)
  33. mysql> SHOW TABLE STATUS LIKE 't1'\G
  34. *************************** 1. row ***************************
  35.            Name: t1
  36.          Engine: InnoDB
  37.         Version: 10
  38.      Row_format: Compact
  39.            Rows: 5
  40.  Avg_row_length: 16
  41.     Data_length: 80
  42. Max_data_length: 0
  43.    Index_length: 0
  44.       Data_free: 0
  45.  Auto_increment: 30001
  46.     Create_time: 2019-04-19 08:32:06
  47.     Update_time: NULL
  48.      Check_time: NULL
  49.       Collation: utf8mb4_bin
  50.        Checksum: 
  51.  Create_options: 
  52.         Comment: 
  53. 1 row in set (0.00 sec)

MySQL 兼容性

SHOW TABLE STATUS 语句与 MySQL 完全兼容。如有任何兼容性差异，请在 GitHub 上提交 issue。

另请参阅