ALL_CONSTRAINTS
网址： http://docs.oracle.com/cd/B19306_01/server.102/b14237/statviews_1037.htm
ALL_CONSTRAINTS describes constraint definitions on tables accessible to the current user.
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DBA_CONSTRAINTSdescribes all constraint definitions in the database. -
USER_CONSTRAINTSdescribes constraint definitions on tables in the current user's schema.
| Column | Datatype | NULL | Description |
|---|---|---|---|
OWNER |
VARCHAR2(30) |
NOT NULL |
Owner of the constraint definition |
CONSTRAINT_NAME |
VARCHAR2(30) |
NOT NULL |
Name of the constraint definition |
CONSTRAINT_TYPE |
VARCHAR2(1) |
Type of constraint definition:
|
|
TABLE_NAME |
VARCHAR2(30) |
NOT NULL |
Name associated with the table (or view) with constraint definition |
SEARCH_CONDITION |
LONG |
Text of search condition for a check constraint | |
R_OWNER |
VARCHAR2(30) |
Owner of table referred to in a referential constraint | |
R_CONSTRAINT_NAME |
VARCHAR2(30) |
Name of the unique constraint definition for referenced table | |
DELETE_RULE |
VARCHAR2(9) |
Delete rule for a referential constraint (CASCADE or NO ACTION) |
|
STATUS |
VARCHAR2(8) |
Enforcement status of constraint (ENABLED or DISABLED) |
|
DEFERRABLE |
VARCHAR2(14) |
Whether the constraint is deferrable | |
DEFERRED |
VARCHAR2(9) |
Whether the constraint was initially deferred | |
VALIDATED |
VARCHAR2(13) |
Whether all data obeys the constraint (VALIDATED or NOT VALIDATED) |
|
GENERATED |
VARCHAR2(14) |
Whether the name of the constraint is user or system generated | |
BAD |
VARCHAR2(3) |
A YES value indicates that this constraint specifies a century in an ambiguous manner. To avoid errors resulting from this ambiguity, rewrite the constraint using the TO_DATE function with a four-digit year.
See Also: the |
|
RELY |
VARCHAR2(4) |
Whether an enabled constraint is enforced or unenforced.
See Also: the constraints in Oracle Database SQL Reference |
|
LAST_CHANGE |
DATE |
When the constraint was last enabled or disabled | |
INDEX_OWNER |
VARCHAR2(30) |
Name of the user owning the index | |
INDEX_NAME |
VARCHAR2(30) |
Name of the index (only shown for unique and primary-key constraints) | |
INVALID |
VARCHAR2(7) |
Whether the constraint is invalid | |
VIEW_RELATED |
VARCHAR2(14) |
Whether the constraint depends on a view |