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.

UNIQUE_CONSTRAINT_CATALOG

The name of the catalog containing the unique constraint that the constraint references. This value is always def.

UNIQUE_CONSTRAINT_SCHEMA

The name of the schema containing the unique constraint that the constraint references.

UNIQUE_CONSTRAINT_NAME

The name of the unique constraint that the constraint references.

MATCH_OPTION

The value of the constraint MATCH attribute. The only valid value at this time is NONE.

UPDATE_RULE

The value of the constraint ON UPDATE attribute. The possible values are CASCADE, SET NULL, SET DEFAULT, RESTRICT, NO ACTION.

DELETE_RULE

The value of the constraint ON DELETE attribute. The possible values are CASCADE, SET NULL, SET DEFAULT, RESTRICT, NO ACTION.

TABLE_NAME

The name of the table. This value is the same as in the TABLE_CONSTRAINTS table.

REFERENCED_TABLE_NAME

The name of the table referenced by the constraint.