RDB$REF CONSTRAINTS
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RDB$REF_CONSTRAINTS stores referential integrity constraint information.
| Column name | Data type | Length | Description |
|---|---|---|---|
|
RDB$3CONSTRAINT_NAME |
CHAR |
67 |
Name of a referential constraint |
|
RDB$CONST_NAME_UQ |
CHAR |
67 |
Name of a referenced PRIMARY KEY or UNIQUE constraint |
|
RDB$MATCH_OPTION |
CHAR |
7 |
Reserved for later use; currently defaults to FULL |
|
RDB$UPDATE_RULE |
CHAR |
11 |
Specifies the type of action on the foreign key when the primary key is updated; values are RESTRICT, NO ACTION, CASCADE, SET NULL, or SET DEFAULT |
|
RDB$DELETE_RULE |
CHAR |
11 |
Specifies the type of action on the foreign key when the primary key is DELETED; values are RESTRICT, NO ACTION, CASCADE, SET NULL, or SET DEFAULT |