# check user create user user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678; create user user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_3456789; ERROR HY000: String 'user5678901_345678902_345678903_345678904_345678905_345678906_34567...' is too long for user name (should be no longer than 128) SELECT host, user FROM mysql.user where user like "user56789%"; Host User % user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678 drop user user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678; create user user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678@host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345; create user user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678@host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_3456; ERROR HY000: String 'host5678901_345678902_345678903_345678904_345678905_345678906_34567...' is too long for host name (should be no longer than 255) SELECT host, user FROM mysql.user where user like "user56789%"; Host User host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345 user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678 create database mariadbtestdb; create database mariadbtestdb2; create table mariadbtestdb.t1 (a int, b int); create table mariadbtestdb2.t2 (a int); create table mariadbtestdb.t3 (a int); SET @saved_dbug = @@GLOBAL.debug_dbug; set global debug_dbug= "+d,vio_peer_addr_fake_ipv4,getnameinfo_fake_long_host,getaddrinfo_fake_good_ipv4"; # check connect connect con1,"127.0.0.1","user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678",,"*NO-ONE*",$MASTER_MYPORT,; connection con1; select current_user(); current_user() user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678@host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345 # check global privileges select * from mariadbtestdb.t1; ERROR 42000: SELECT command denied to user 'user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678'@'host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345' for table `mariadbtestdb`.`t1` select * from mariadbtestdb2.t2; ERROR 42000: SELECT command denied to user 'user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678'@'host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345' for table `mariadbtestdb2`.`t2` connection default; grant SELECT ON *.* TO user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678@host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345; disconnect con1; connect con1,"127.0.0.1","user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678",,test,$MASTER_MYPORT,; connection con1; select * from mariadbtestdb.t1; a b select * from mariadbtestdb2.t2; a # check revoke connection default; REVOKE ALL PRIVILEGES, GRANT OPTION FROM user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678@host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345; disconnect con1; connect con1,"127.0.0.1","user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678",,"*NO-ONE*",$MASTER_MYPORT,; connection con1; select * from mariadbtestdb.t1; ERROR 42000: SELECT command denied to user 'user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678'@'host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345' for table `mariadbtestdb`.`t1` select * from mariadbtestdb2.t2; ERROR 42000: SELECT command denied to user 'user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678'@'host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345' for table `mariadbtestdb2`.`t2` # check data base privileges connection default; grant SELECT ON mariadbtestdb.* TO user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678@host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345; disconnect con1; connect con1,"127.0.0.1","user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678",,"*NO-ONE*",$MASTER_MYPORT,; connection con1; select * from mariadbtestdb.t1; a b select * from mariadbtestdb2.t2; ERROR 42000: SELECT command denied to user 'user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678'@'host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345' for table `mariadbtestdb2`.`t2` select * from mariadbtestdb.t3; a # check table privileges connection default; REVOKE ALL PRIVILEGES, GRANT OPTION FROM user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678@host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345; grant SELECT ON mariadbtestdb.t1 TO user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678@host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345; disconnect con1; connect con1,"127.0.0.1","user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678",,"*NO-ONE*",$MASTER_MYPORT,; connection con1; select * from mariadbtestdb.t1; a b select * from mariadbtestdb2.t2; ERROR 42000: SELECT command denied to user 'user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678'@'host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345' for table `mariadbtestdb2`.`t2` select * from mariadbtestdb.t3; ERROR 42000: SELECT command denied to user 'user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678'@'host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345' for table `mariadbtestdb`.`t3` # check column privileges connection default; REVOKE ALL PRIVILEGES, GRANT OPTION FROM user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678@host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345; grant SELECT (a) ON mariadbtestdb.t1 TO user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678@host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345; disconnect con1; connect con1,"127.0.0.1","user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678",,"*NO-ONE*",$MASTER_MYPORT,; connection con1; select * from mariadbtestdb.t1; ERROR 42000: SELECT command denied to user 'user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678'@'host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345' for table `mariadbtestdb`.`t1` select * from mariadbtestdb2.t2; ERROR 42000: SELECT command denied to user 'user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678'@'host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345' for table `mariadbtestdb2`.`t2` select * from mariadbtestdb.t3; ERROR 42000: SELECT command denied to user 'user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678'@'host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345' for table `mariadbtestdb`.`t3` select a from mariadbtestdb.t1; a # check role connection default; CREATE ROLE role5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678; CREATE ROLE role5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_3456789; ERROR HY000: String 'role5678901_345678902_345678903_345678904_345678905_345678906_34567...' is too long for user name (should be no longer than 128) grant SELECT (a) ON mariadbtestdb.t1 TO role5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678; REVOKE ALL PRIVILEGES, GRANT OPTION FROM user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678@host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345; GRANT CREATE ROUTINE on test.* to user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678@host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345; grant role5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678 to user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678@host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345; disconnect con1; connect con1,"127.0.0.1","user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678",,test,$MASTER_MYPORT,; connection con1; select * from mariadbtestdb.t1; ERROR 42000: SELECT command denied to user 'user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678'@'host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345' for table `mariadbtestdb`.`t1` select * from mariadbtestdb2.t2; ERROR 42000: SELECT command denied to user 'user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678'@'host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345' for table `mariadbtestdb2`.`t2` select * from mariadbtestdb.t3; ERROR 42000: SELECT command denied to user 'user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678'@'host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345' for table `mariadbtestdb`.`t3` select a from mariadbtestdb.t1; ERROR 42000: SELECT command denied to user 'user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678'@'host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345' for table `mariadbtestdb`.`t1` SELECT CURRENT_ROLE; CURRENT_ROLE NULL SET ROLE role5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678; SELECT CURRENT_ROLE; CURRENT_ROLE role5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678 select * from mariadbtestdb.t1; ERROR 42000: SELECT command denied to user 'user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678'@'host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345' for table `mariadbtestdb`.`t1` select * from mariadbtestdb2.t2; ERROR 42000: SELECT command denied to user 'user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678'@'host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345' for table `mariadbtestdb2`.`t2` select * from mariadbtestdb.t3; ERROR 42000: SELECT command denied to user 'user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678'@'host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345' for table `mariadbtestdb`.`t3` select a from mariadbtestdb.t1; a # check procedure create procedure foo() select a from mariadbtestdb.t1; show create procedure foo; Procedure sql_mode Create Procedure character_set_client collation_connection Database Collation foo STRICT_TRANS_TABLES,ERROR_FOR_DIVISION_BY_ZERO,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION CREATE DEFINER=`user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678`@`host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345` PROCEDURE `foo`() select a from mariadbtestdb.t1 latin1 latin1_swedish_ci latin1_swedish_ci connection default; select Host,Db,User,Routine_name,Routine_type,Grantor,Proc_priv from mysql.procs_priv where Routine_name="foo"; Host Db User Routine_name Routine_type Grantor Proc_priv host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345 test user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678 foo PROCEDURE user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678@host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345 Execute,Alter Routine connection default; disconnect con1; drop procedure foo; SET @@GLOBAL.debug_dbug = @saved_dbug; drop user user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678@host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_345; DROP ROLE role5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678; drop database mariadbtestdb; drop database mariadbtestdb2; # # MDEV-24968: Assertion `magic < 1<<26' failed in get_magic_sort # create user u1@'host5678901_345678902_345678903_345678904_345678905_345678906_345678907%'; drop user u1@'host5678901_345678902_345678903_345678904_345678905_345678906_345678907%'; create user 'user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678'@'host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_34%'; drop user 'user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678'@'host5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678913_345678914_345678915_345678916_345678917_345678918_345678919_345678920_345678921_345678922_345678923_345678924_345678925_34%'; create user '5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678'@'%'; drop user '5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678'@'%'; create user 'user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678'@'h%s%5%7%9%1%3%5%7%9%2%3%5%7%9%3%3%5%7%9%4%3%5%7%9%5%3%5%7%9%6%3%5%7%9%7%3%5%7%9%8%3%5%7%9%9%3%5%7%9%0%3%5%7%'; drop user 'user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678'@'h%s%5%7%9%1%3%5%7%9%2%3%5%7%9%3%3%5%7%9%4%3%5%7%9%5%3%5%7%9%6%3%5%7%9%7%3%5%7%9%8%3%5%7%9%9%3%5%7%9%0%3%5%7%'; create user 'user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678'@'?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%'; drop user 'user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678'@'?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%?%'; create user 'user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678'@'???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????'; drop user 'user5678901_345678902_345678903_345678904_345678905_345678906_345678907_345678908_345678909_345678910_345678911_345678912_345678'@'???????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????????';