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MySQL 9.5 Reference Manual  / ...  / INFORMATION_SCHEMA Tables  / INFORMATION_SCHEMA General Tables  /  The INFORMATION_SCHEMA CHECK_CONSTRAINTS Table

28.3.5 The INFORMATION_SCHEMA CHECK_CONSTRAINTS Table

CREATE TABLE supports the core features of table and columnCHECK constraints; theCHECK_CONSTRAINTS table provides information about these constraints.

TheCHECK_CONSTRAINTS table has these columns:

  • CONSTRAINT_CATALOG

    The name of the catalog to which the constraint belongs. This value is alwaysdef.

  • 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.