4.5 The INFORMATION_SCHEMA CHECK_CONSTRAINTS Table

As of MySQL 8.0.16, CREATE TABLE permits the core features of table and column CHECK constraints, and the CHECK_CONSTRAINTS table provides information about these constraints.

The CHECK_CONSTRAINTS 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.