connection default; SELECT @@innodb_undo_tablespaces; use information_schema; select * from INNODB_TABLESPACES where space >= 4294967276 and space <= 4294967279; select * from INNODB_TABLESPACES_BRIEF where space >= 4294967276 and space <= 4294967279; select * from INNODB_DATAFILES where space >= 4294967276 and space <= 4294967279; --error ER_WRONG_TABLESPACE_NAME drop tablespace innodb_undo_001; --error ER_WRONG_TABLESPACE_NAME drop tablespace innodb_undo_002; --error ER_WRONG_TABLESPACE_NAME ALTER UNDO TABLESPACE innodb_undo_001 SET INACTIVE; --error ER_WRONG_TABLESPACE_NAME ALTER UNDO TABLESPACE innodb_undo_002 SET INACTIVE;