/**
 * Creates a view to get all foreign keys of the current database.
 */
 CREATE OR REPLACE VIEW pg_foreign_keys AS
 SELECT tc.table_catalog
 	, tc.table_schema
 	, tc.table_name
 	, kcu.column_name
 	, ccu.TABLE_NAME AS foreign_table_name
 	, ccu.COLUMN_NAME AS foreign_column_name
 FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS AS tc
 	INNER JOIN INFORMATION_SCHEMA.KEY_COLUMN_USAGE AS kcu
 		ON tc.CONSTRAINT_NAME = kcu.CONSTRAINT_NAME
 		INNER JOIN INFORMATION_SCHEMA.CONSTRAINT_COLUMN_USAGE AS ccu
 			ON ccu.CONSTRAINT_NAME = tc.CONSTRAINT_NAME
 WHERE tc.CONSTRAINT_TYPE = 'FOREIGN KEY'
 ;
 COMMENT ON VIEW pg_foreign_keys IS 'The view returns all foreign keys of the current database';