### 26.3.5 The INFORMATION\_SCHEMA CHECK\_CONSTRAINTS Table

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 As of MySQL 8.0.16, [`CREATE TABLE`](create-table.html) permits the core features of table and column `CHECK` constraints, and the the [`CHECK_CONSTRAINTS`](information-schema-check-constraints-table.html) table provides information about these constraints.

 The [`CHECK_CONSTRAINTS`](information-schema-check-constraints-table.html) table has these columns:

* `CONSTRAINT_CATALOG`

   The name of the catalog to which the constraint belongs. This value is always `def`.

* `CONSTRAINT_SCHEMA`

   The name of the schema (database) to which the constraint belongs.

* `CONSTRAINT_NAME`

   The name of the constraint.

* `CHECK_CLAUSE`

   The expression that specifies the constraint condition.

