Problems with EMPTY_STRING_IS_NULL and I_S tables

SET SQL_MODE= 'EMPTY_STRING_IS_NULL';

SHOW CREATE TABLE INFORMATION_SCHEMA.TABLES;

+--------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

| Table  | Create Table                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                     |

+--------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

| TABLES | CREATE TEMPORARY TABLE `TABLES` (

  `TABLE_CATALOG` varchar(512) NOT NULL DEFAULT '',

  `TABLE_SCHEMA` varchar(64) NOT NULL DEFAULT '',

  `TABLE_NAME` varchar(64) NOT NULL DEFAULT '',

  `TABLE_TYPE` varchar(64) NOT NULL DEFAULT '',

  `ENGINE` varchar(64) DEFAULT NULL,

  `VERSION` bigint(21) unsigned DEFAULT NULL,

  `ROW_FORMAT` varchar(10) DEFAULT NULL,

  `TABLE_ROWS` bigint(21) unsigned DEFAULT NULL,

  `AVG_ROW_LENGTH` bigint(21) unsigned DEFAULT NULL,

  `DATA_LENGTH` bigint(21) unsigned DEFAULT NULL,

  `MAX_DATA_LENGTH` bigint(21) unsigned DEFAULT NULL,

  `INDEX_LENGTH` bigint(21) unsigned DEFAULT NULL,

  `DATA_FREE` bigint(21) unsigned DEFAULT NULL,

  `AUTO_INCREMENT` bigint(21) unsigned DEFAULT NULL,

  `CREATE_TIME` datetime DEFAULT NULL,

  `UPDATE_TIME` datetime DEFAULT NULL,

  `CHECK_TIME` datetime DEFAULT NULL,

  `TABLE_COLLATION` varchar(32) DEFAULT NULL,

  `CHECKSUM` bigint(21) unsigned DEFAULT NULL,

  `CREATE_OPTIONS` varchar(2048) DEFAULT NULL,

  `TABLE_COMMENT` varchar(2048) NOT NULL DEFAULT '',

  `MAX_INDEX_LENGTH` bigint(21) unsigned DEFAULT NULL,

  `TEMPORARY` varchar(1) DEFAULT NULL

) ENGINE=MEMORY DEFAULT CHARSET=utf8 |

+--------+--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+

SET SQL_MODE= 'EMPTY_STRING_IS_NULL';

CREATE OR REPLACE TABLE t1 (TABLE_CATALOG varchar(512) NOT NULL DEFAULT '');

ERROR 1067 (42000): Invalid default value for 'TABLE_CATALOG'