Describes the information specific to foreign key constraints in the current database.
| Column Name | Type | Length | Nullability | Contents |
|---|---|---|---|---|
| CONSTRAINTID | CHAR | 36 | false | unique identifier for the foreign key constraint (join with SYSCONSTRAINTS. CONSTRAINTID) |
| CONGLOMERATEID | CHAR | 36 | false | unique identifier for index backing up the foreign key constraint (join with SYSCONGLOMERATES. CONGLOMERATEID) |
| KEYCONSTRAINTID | CHAR | 36 | false | unique identifier for the primary key or unique constraint referenced by this foreign key (SYSKEYS.CONSTRAINTID or SYSCONSTRAINTS. CONSTRAINTID) |
| DELETERULE | CHAR | 1 | false | R for NO ACTION (default), S for RESTRICT, C for CASCADE, U for SET NULL |
| UPDATERULE | CHAR | 1 | false | R for NO ACTION(default), S for restrict |