MySQL 8.4 Release Notes
28.3.5 INFORMATION_SCHEMA CHECK_CONSTRAINTS 表
CREATE TABLE supports the core features of table and column CHECK constraints; the CHECK_CONSTRAINTS table provides information about these constraints.
The CHECK_CONSTRAINTS table has these columns:
-
CONSTRAINT_CATALOGThe name of the catalog to which the constraint belongs. This value is always
def. -
CONSTRAINT_SCHEMAThe name of the schema (database) to which the constraint belongs.
-
CONSTRAINT_NAMEThe name of the constraint.
-
CHECK_CLAUSEThe expression that specifies the constraint condition.