SELECT COUNT(*) FROM `information_schema`.`INNODB_SYS_INDEXES` ; CREATE TABLE test.t1 ( `a` SERIAL NOT NULL , `b` VARCHAR( 255 ) NOT NULL , INDEX ( `b` ) ) ENGINE = InnoDB ; SHOW TABLE STATUS FROM `information_schema` LIKE 'INNODB\_SYS\_INDEXES%' ; drop table test.t1; SHOW TABLE STATUS FROM `information_schema` LIKE 'INNODB\_SYS\_INDEXES%' ; SELECT COUNT(*) FROM `information_schema`.`INNODB_SYS_INDEXES` ; CREATE TABLE test.t1 ( `a` SERIAL NOT NULL , `b` VARCHAR( 255 ) NOT NULL , INDEX ( `b` ) ) ENGINE = InnoDB ; SHOW TABLE STATUS FROM `information_schema` LIKE 'INNODB\_SYS\_INDEXES%' ; SELECT COUNT(*) FROM `information_schema`.`INNODB_SYS_INDEXES` ; drop table test.t1; SHOW TABLE STATUS FROM `information_schema` LIKE 'INNODB\_SYS\_INDEXES%' ;