ALL_CONSTRAINTS

ALL_CONSTRAINTS describes constraint definitions on tables accessible to the current user.

Related Views

  • DBA_CONSTRAINTS describes all constraint definitions in the database.

  • USER_CONSTRAINTS describes constraint definitions on tables in the current user's schema.

Column Datatype NULL Description
OWNER VARCHAR2(30)   Owner of the constraint definition
CONSTRAINT_NAME VARCHAR2(30) NOT NULL Name of the constraint definition
CONSTRAINT_TYPE VARCHAR2(1)   Type of the constraint definition:

  • C - Check constraint on a table

  • P - Primary key

  • U - Unique key

  • R - Referential integrity

  • V - With check option, on a view

  • O - With read only, on a view

  • H - Hash expression

  • F - Constraint that involves a REF column

  • S - Supplemental logging
TABLE_NAME VARCHAR2(30) NOT NULL Name associated with the table (or view) with the constraint definition
SEARCH_CONDITION LONG   Text of search condition for a check constraint
R_OWNER VARCHAR2(30)   Owner of the table referred to in a referential constraint
R_CONSTRAINT_NAME VARCHAR2(30)   Name of the unique constraint definition for the referenced table
DELETE_RULE VARCHAR2(9)   Delete rule for a referential constraint:

  • CASCADE

  • SET NULL

  • NO ACTION
STATUS VARCHAR2(8)   Enforcement status of the constraint:

  • ENABLED

  • DISABLED
DEFERRABLE VARCHAR2(14)   Indicates whether the constraint is deferrable (DEFERRABLE) or not (NOT DEFERRABLE)
DEFERRED VARCHAR2(9)   Indicates whether the constraint was initially deferred (DEFERRED) or not (IMMEDIATE)
VALIDATED VARCHAR2(13)   When STATUS = ENABLED, possible values are:

  • VALIDATED - All data obeys the constraint (that is, the existing data in the table was validated when the constraint was enabled, as well as any subsequent data entered into the table)

  • NOT VALIDATED - All data may not obey the constraint (that is, the existing data in the table was not validated when the constraint was enabled, but subsequent data entered into the table was validated)

When STATUS = DISABLED, possible values are:

  • VALIDATED - All data obeys the constraint, but the unique index on the constraint has been dropped. This setting is useful in data warehousing environments, but has some restrictions. Refer to Oracle Database Data Warehousing Guide for more information on this setting.

  • NOT VALIDATED - All data may not obey the constraint
GENERATED VARCHAR2(14)   Indicates whether the name of the constraint is user-generated (USER NAME) or system-generated (GENERATED NAME)
BAD VARCHAR2(3)   Indicates whether this constraint specifies a century in an ambiguous manner (BAD) or not (NULL). To avoid errors resulting from this ambiguity, rewrite the constraint using the TO_DATE function with a four-digit year.

See Also: the TO_DATE function in Oracle Database SQL Language Reference and Oracle Database Advanced Application Developer's Guide
RELY VARCHAR2(4)   When VALIDATED = NOT VALIDATED, this column indicates whether the constraint is to be taken into account for query rewrite (RELY) or not (NULL).

When VALIDATED = VALIDATED, this column is not meaningful.

See Also: constraints in Oracle Database SQL Language 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)   Indicates whether the constraint is invalid (INVALID) or not (NULL)
VIEW_RELATED VARCHAR2(14)   Indicates whether the constraint depends on a view (DEPEND ON VIEW) or not (NULL)