constraint_table_usage
The view constraint_table_usage
identifies all
tables in the current database that are used by some constraint and
are owned by a currently enabled role. (This is different from the
view table_constraints
, which identifies all
table constraints along with the table they are defined on.) For a
foreign key constraint, this view identifies the table that the
foreign key references. For a unique or primary key constraint,
this view simply identifies the table the constraint belongs to.
Check constraints and not-null constraints are not included in this
view.
Table 36.16. constraint_table_usage
Columns
Name | Data Type | Description |
---|---|---|
table_catalog | sql_identifier | Name of the database that contains the table that is used by some constraint (always the current database) |
table_schema | sql_identifier | Name of the schema that contains the table that is used by some constraint |
table_name | sql_identifier | Name of the table that is used by some constraint |
constraint_catalog | sql_identifier | Name of the database that contains the constraint (always the current database) |
constraint_schema | sql_identifier | Name of the schema that contains the constraint |
constraint_name | sql_identifier | Name of the constraint |