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

ShowTableStmt

SHOW TABLE STATUS - 图1

ShowLikeOrWhere

SHOW TABLE STATUS - 图2

  1. ShowTableStmt ::=
  2.     "SHOW" "FULL"? "TABLES" ("FROM" Identifier | "IN" Identifier )? ShowLikeOrWhere?
  4. ShowLikeOrWhere ::=
  5.     "LIKE" SimpleExpr
  6. |   "WHERE" Expression

示例

  1. CREATE TABLE t1 (id INT NOT NULL PRIMARY KEY AUTO_INCREMENT, c1 INT NOT NULL);
  1. Query OK, 0 rows affected (0.11 sec)
  1. INSERT INTO t1 (c1) VALUES (1),(2),(3),(4),(5);
  1. Query OK, 5 rows affected (0.02 sec)
  2. Records: 5  Duplicates: 0  Warnings: 0
  1. SHOW TABLE STATUS LIKE 't1';
  1. *************************** 1. row ***************************
  2.            Name: t1
  3.          Engine: InnoDB
  4.         Version: 10
  5.      Row_format: Compact
  6.            Rows: 0
  7.  Avg_row_length: 0
  8.     Data_length: 0
  9. Max_data_length: 0
  10.    Index_length: 0
  11.       Data_free: 0
  12.  Auto_increment: 30001
  13.     Create_time: 2019-04-19 08:32:06
  14.     Update_time: NULL
  15.      Check_time: NULL
  16.       Collation: utf8mb4_bin
  17.        Checksum:
  18.  Create_options:
  19.         Comment:
  20. 1 row in set (0.00 sec)
  1. ANALYZE TABLE t1;
  1. Query OK, 0 rows affected (0.12 sec)
  1. SHOW TABLE STATUS LIKE 't1';
  1. *************************** 1. row ***************************
  2.            Name: t1
  3.          Engine: InnoDB
  4.         Version: 10
  5.      Row_format: Compact
  6.            Rows: 5
  7.  Avg_row_length: 16
  8.     Data_length: 80
  9. Max_data_length: 0
  10.    Index_length: 0
  11.       Data_free: 0
  12.  Auto_increment: 30001
  13.     Create_time: 2019-04-19 08:32:06
  14.     Update_time: NULL
  15.      Check_time: NULL
  16.       Collation: utf8mb4_bin
  17.        Checksum:
  18.  Create_options:
  19.         Comment:
  20. 1 row in set (0.00 sec)

MySQL 兼容性

SHOW TABLE STATUS 语句与 MySQL 完全兼容。如发现任何兼容性差异，请尝试 TiDB 支持资源。

另请参阅