Documentazione di PostgreSQL 9.0 > Client Interfaces > The Information Schema > constraint_table_usage
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34.14. 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.

Tabella 34.12. constraint_table_usage Columns

NameData TypeDescription
table_catalogsql_identifier Name of the database that contains the table that is used by some constraint (always the current database)
table_schemasql_identifier Name of the schema that contains the table that is used by some constraint
table_namesql_identifierName of the table that is used by some constraint
constraint_catalogsql_identifierName of the database that contains the constraint (always the current database)
constraint_schemasql_identifierName of the schema that contains the constraint
constraint_namesql_identifierName of the constraint

Documentazione di PostgreSQL 9.0 > Client Interfaces > The Information Schema > constraint_table_usage
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