SHOW INDEXES [FROM|IN]

The statement SHOW INDEXES [FROM|IN] lists the indexes on a specified table. The statements SHOW INDEX [FROM|IN], SHOW KEYS [FROM|IN] are aliases of this statement, and included for compatibility with MySQL.

Synopsis

ShowIndexStmt:

ShowIndexStmt

ShowIndexKwd:

ShowIndexKwd

FromOrIn:

FromOrIn

TableName:

TableName

ShowLikeOrWhereOpt:

ShowLikeOrWhereOpt

Examples

  1. mysql> CREATE TABLE t1 (id int not null primary key AUTO_INCREMENT, col1 INT, INDEX(col1));
  2. Query OK, 0 rows affected (0.12 sec)
  4. mysql> SHOW INDEXES FROM t1;
  5. +-------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+---------+------------+
  6. | Table | Non_unique | Key_name | Seq_in_index | Column_name | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment | Index_comment | Visible | Expression |
  7. +-------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+---------+------------+
  8. | t1    |          0 | PRIMARY  |            1 | id          | A         |           0 |     NULL | NULL   |      | BTREE      |         |               | YES     | NULL       |
  9. | t1    |          1 | col1     |            1 | col1        | A         |           0 |     NULL | NULL   | YES  | BTREE      |         |               | YES     | NULL       |
  10. +-------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+---------+------------+
  11. 2 rows in set (0.00 sec)
  13. mysql> SHOW INDEX FROM t1;
  14. +-------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+---------+------------+
  15. | Table | Non_unique | Key_name | Seq_in_index | Column_name | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment | Index_comment | Visible | Expression |
  16. +-------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+---------+------------+
  17. | t1    |          0 | PRIMARY  |            1 | id          | A         |           0 |     NULL | NULL   |      | BTREE      |         |               | YES     | NULL       |
  18. | t1    |          1 | col1     |            1 | col1        | A         |           0 |     NULL | NULL   | YES  | BTREE      |         |               | YES     | NULL       |
  19. +-------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+---------+------------+
  20. 2 rows in set (0.00 sec)
  22. mysql> SHOW KEYS FROM t1;
  23. +-------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+---------+------------+
  24. | Table | Non_unique | Key_name | Seq_in_index | Column_name | Collation | Cardinality | Sub_part | Packed | Null | Index_type | Comment | Index_comment | Visible | Expression |
  25. +-------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+---------+------------+
  26. | t1    |          0 | PRIMARY  |            1 | id          | A         |           0 |     NULL | NULL   |      | BTREE      |         |               | YES     | NULL       |
  27. | t1    |          1 | col1     |            1 | col1        | A         |           0 |     NULL | NULL   | YES  | BTREE      |         |               | YES     | NULL       |
  28. +-------+------------+----------+--------------+-------------+-----------+-------------+----------+--------+------+------------+---------+---------------+---------+------------+
  29. 2 rows in set (0.00 sec)

MySQL compatibility

The SHOW INDEXES [FROM|IN] statement in TiDB is fully compatible with MySQL. If you find any compatibility differences, report a bug.

See also