MySQL 8.3 Release Notes
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:
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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.
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CONSTRAINT_NAMEThe name of the constraint.
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CHECK_CLAUSEThe expression that specifies the constraint condition.