36.18. 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 |