28.3.5 The INFORMATION_SCHEMA CHECK_CONSTRAINTS Table (original) (raw)

28.3.5 The INFORMATION_SCHEMA CHECK_CONSTRAINTS Table

As of MySQL 8.0.16, CREATE TABLE permits the core features of table and columnCHECK constraints, and theCHECK_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.