MySQL 8.0 Reference Manual Including MySQL NDB Cluster 8.0

26.3.32 The INFORMATION_SCHEMA SCHEMATA_EXTENSIONS Table

The SCHEMATA_EXTENSIONS table (available as of MySQL 8.0.22) augments the SCHEMATA table with information about schema options.

The SCHEMATA_EXTENSIONS table has these columns:

Example

mysql> ALTER SCHEMA mydb READ ONLY = 1;
mysql> SELECT * FROM INFORMATION_SCHEMA.SCHEMATA_EXTENSIONS
       WHERE SCHEMA_NAME = 'mydb';
+--------------+-------------+-------------+
| CATALOG_NAME | SCHEMA_NAME | OPTIONS     |
+--------------+-------------+-------------+
| def          | mydb        | READ ONLY=1 |
+--------------+-------------+-------------+

mysql> ALTER SCHEMA mydb READ ONLY = 0;
mysql> SELECT * FROM INFORMATION_SCHEMA.SCHEMATA_EXTENSIONS
       WHERE SCHEMA_NAME = 'mydb';
+--------------+-------------+---------+
| CATALOG_NAME | SCHEMA_NAME | OPTIONS |
+--------------+-------------+---------+
| def          | mydb        |         |
+--------------+-------------+---------+

Notes