constraint_table_usageThe 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 37.16. 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 |