Как получить список всех внешних ключей в MySQL

SELECT CONCAT(fks.CONSTRAINT_SCHEMA, '.', fks.TABLE_NAME) AS constraint_table,
       GROUP_CONCAT(kcu.COLUMN_NAME
                    ORDER BY POSITION_IN_UNIQUE_CONSTRAINT SEPARATOR ', ')
                                                          AS constraint_columns,
       '->'                                               AS rel,
       CONCAT(fks.UNIQUE_CONSTRAINT_SCHEMA, '.', fks.REFERENCED_TABLE_NAME)
                                                          AS ref_table,
       GROUP_CONCAT(kcu.REFERENCED_COLUMN_NAME
                    ORDER BY POSITION_IN_UNIQUE_CONSTRAINT SEPARATOR ', ')
                                                          AS ref_columns,

       fks.CONSTRAINT_NAME                                as fk_name,
       rc.DELETE_RULE                                     as on_delete,
       rc.UPDATE_RULE                                     as on_update
FROM information_schema.REFERENTIAL_CONSTRAINTS fks
         JOIN information_schema.KEY_COLUMN_USAGE kcu
              ON fks.CONSTRAINT_SCHEMA = kcu.TABLE_SCHEMA
                  AND fks.TABLE_NAME = kcu.TABLE_NAME
                  AND fks.CONSTRAINT_NAME = kcu.CONSTRAINT_NAME
         JOIN information_schema.REFERENTIAL_CONSTRAINTS rc 
              ON fks.CONSTRAINT_NAME = rc.CONSTRAINT_NAME
WHERE fks.CONSTRAINT_SCHEMA = 'schema1'         # Схема с внешними ключами
#   AND kcu.TABLE_NAME = 'table1'               # Таблица с внешними ключами
#   AND kcu.REFERENCED_TABLE_SCHEMA = 'schema2' # Схема на таблицы которой ссылаются внешние ключи
#   AND kcu.REFERENCED_TABLE_NAME = 'table2'    # Таблица на которую ссылаются внешние ключи
GROUP BY fks.CONSTRAINT_SCHEMA,
         fks.TABLE_NAME,
         fks.UNIQUE_CONSTRAINT_SCHEMA,
         fks.REFERENCED_TABLE_NAME,
         fks.CONSTRAINT_NAME
ORDER BY fks.CONSTRAINT_SCHEMA,
         fks.TABLE_NAME;