select priv into @root_priv from mysql.global_priv where user='root'and host='localhost';
select * from mysql.user where user = 'root'and host = 'localhost';
Host User Password Select_priv Insert_priv Update_priv Delete_priv Create_priv Drop_priv Reload_priv Shutdown_priv Process_priv File_priv Grant_priv References_priv Index_priv Alter_priv Show_db_priv Super_priv Create_tmp_table_priv Lock_tables_priv Execute_priv Repl_slave_priv Repl_client_priv Create_view_priv Show_view_priv Create_routine_priv Alter_routine_priv Create_user_priv Event_priv Trigger_priv Create_tablespace_priv Delete_history_priv ssl_type ssl_cipher x509_issuer x509_subject max_questions max_updates max_connections max_user_connections plugin authentication_string password_expired is_role default_role max_statement_time
localhost root Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y 0000 N N 0.000000
# Test syntax
#
# These 2 selects should have no changes from the first one.
alter user CURRENT_USER;
select * from mysql.user where user = 'root'and host = 'localhost';
Host User Password Select_priv Insert_priv Update_priv Delete_priv Create_priv Drop_priv Reload_priv Shutdown_priv Process_priv File_priv Grant_priv References_priv Index_priv Alter_priv Show_db_priv Super_priv Create_tmp_table_priv Lock_tables_priv Execute_priv Repl_slave_priv Repl_client_priv Create_view_priv Show_view_priv Create_routine_priv Alter_routine_priv Create_user_priv Event_priv Trigger_priv Create_tablespace_priv Delete_history_priv ssl_type ssl_cipher x509_issuer x509_subject max_questions max_updates max_connections max_user_connections plugin authentication_string password_expired is_role default_role max_statement_time
localhost root Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y 0000 mysql_native_password N N 0.000000
alter user CURRENT_USER();
select * from mysql.user where user = 'root'and host = 'localhost';
Host User Password Select_priv Insert_priv Update_priv Delete_priv Create_priv Drop_priv Reload_priv Shutdown_priv Process_priv File_priv Grant_priv References_priv Index_priv Alter_priv Show_db_priv Super_priv Create_tmp_table_priv Lock_tables_priv Execute_priv Repl_slave_priv Repl_client_priv Create_view_priv Show_view_priv Create_routine_priv Alter_routine_priv Create_user_priv Event_priv Trigger_priv Create_tablespace_priv Delete_history_priv ssl_type ssl_cipher x509_issuer x509_subject max_questions max_updates max_connections max_user_connections plugin authentication_string password_expired is_role default_role max_statement_time
localhost root Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y Y 0000 mysql_native_password N N 0.000000
create user foo;
select * from mysql.user where user = 'foo';
Host User Password Select_priv Insert_priv Update_priv Delete_priv Create_priv Drop_priv Reload_priv Shutdown_priv Process_priv File_priv Grant_priv References_priv Index_priv Alter_priv Show_db_priv Super_priv Create_tmp_table_priv Lock_tables_priv Execute_priv Repl_slave_priv Repl_client_priv Create_view_priv Show_view_priv Create_routine_priv Alter_routine_priv Create_user_priv Event_priv Trigger_priv Create_tablespace_priv Delete_history_priv ssl_type ssl_cipher x509_issuer x509_subject max_questions max_updates max_connections max_user_connections plugin authentication_string password_expired is_role default_role max_statement_time
% foo N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N 0000 mysql_native_password N N 0.000000
alter user foo;
select * from mysql.user where user = 'foo';
Host User Password Select_priv Insert_priv Update_priv Delete_priv Create_priv Drop_priv Reload_priv Shutdown_priv Process_priv File_priv Grant_priv References_priv Index_priv Alter_priv Show_db_priv Super_priv Create_tmp_table_priv Lock_tables_priv Execute_priv Repl_slave_priv Repl_client_priv Create_view_priv Show_view_priv Create_routine_priv Alter_routine_priv Create_user_priv Event_priv Trigger_priv Create_tablespace_priv Delete_history_priv ssl_type ssl_cipher x509_issuer x509_subject max_questions max_updates max_connections max_user_connections plugin authentication_string password_expired is_role default_role max_statement_time
% foo N N N N N N N N N N N N N N N N N N N N N N N N N N N N N N 0000 mysql_native_password N N 0.000000
#
# Test READ_ONLY privilege works correctly with a read only database.
# SET @start_read_only = @@global.read_only; SET GLOBAL read_only=1;
grant create user on *.* to foo;
# Currently no READ_ONLY ADMIN privileges.
connect a, localhost, foo;
select @@global.read_only;
@@global.read_only
ON
alter user foo; ERROR HY000: The MariaDB server is running with the --read-only=ON option so it cannot execute this statement
disconnect a;
# Grant READ_ONLY ADMIN privilege to the user.
connection default;
grant READ_ONLY ADMIN on *.* to foo;
# We now have READ_ONLY ADMIN privilege. We should be able to run alter user.
connect b, localhost, foo;
alter user foo;
disconnect b;
connection default; SET GLOBAL read_only = @start_read_only;
#
# Test inexistant user.
#
alter user boo; ERROR HY000: Operation ALTER USER failed for 'boo'
#--warning ER_CANNOT_USER
alter user if exists boo;
Warnings: Error1133 Can't find any matching row in the user table
Note 1396 Operation ALTER USER failed for 'boo'
#
# Test password related altering.
#
alter user foo identified by 'something';
select * from mysql.user where user = 'foo';
Host User Password Select_priv Insert_priv Update_priv Delete_priv Create_priv Drop_priv Reload_priv Shutdown_priv Process_priv File_priv Grant_priv References_priv Index_priv Alter_priv Show_db_priv Super_priv Create_tmp_table_priv Lock_tables_priv Execute_priv Repl_slave_priv Repl_client_priv Create_view_priv Show_view_priv Create_routine_priv Alter_routine_priv Create_user_priv Event_priv Trigger_priv Create_tablespace_priv Delete_history_priv ssl_type ssl_cipher x509_issuer x509_subject max_questions max_updates max_connections max_user_connections plugin authentication_string password_expired is_role default_role max_statement_time
% foo *88C89BE093D4ECF72D039F62EBB7477EA1FD4D63 N N N N N N N N N N N N N N N N N N N N N N N N N Y N N N N 0000 mysql_native_password *88C89BE093D4ECF72D039F62EBB7477EA1FD4D63 N N 0.000000
alter user foo identified by 'something2';
select * from mysql.user where user = 'foo';
Host User Password Select_priv Insert_priv Update_priv Delete_priv Create_priv Drop_priv Reload_priv Shutdown_priv Process_priv File_priv Grant_priv References_priv Index_priv Alter_priv Show_db_priv Super_priv Create_tmp_table_priv Lock_tables_priv Execute_priv Repl_slave_priv Repl_client_priv Create_view_priv Show_view_priv Create_routine_priv Alter_routine_priv Create_user_priv Event_priv Trigger_priv Create_tablespace_priv Delete_history_priv ssl_type ssl_cipher x509_issuer x509_subject max_questions max_updates max_connections max_user_connections plugin authentication_string password_expired is_role default_role max_statement_time
% foo *9CD58369E930E28C8996A89DB18B63294E6DC10C N N N N N N N N N N N N N N N N N N N N N N N N N Y N N N N 0000 mysql_native_password *9CD58369E930E28C8996A89DB18B63294E6DC10C N N 0.000000
alter user foo identified by password '*88C89BE093D4ECF72D039F62EBB7477EA1FD4D63';
select * from mysql.user where user = 'foo';
Host User Password Select_priv Insert_priv Update_priv Delete_priv Create_priv Drop_priv Reload_priv Shutdown_priv Process_priv File_priv Grant_priv References_priv Index_priv Alter_priv Show_db_priv Super_priv Create_tmp_table_priv Lock_tables_priv Execute_priv Repl_slave_priv Repl_client_priv Create_view_priv Show_view_priv Create_routine_priv Alter_routine_priv Create_user_priv Event_priv Trigger_priv Create_tablespace_priv Delete_history_priv ssl_type ssl_cipher x509_issuer x509_subject max_questions max_updates max_connections max_user_connections plugin authentication_string password_expired is_role default_role max_statement_time
% foo *88C89BE093D4ECF72D039F62EBB7477EA1FD4D63 N N N N N N N N N N N N N N N N N N N N N N N N N Y N N N N 0000 mysql_native_password *88C89BE093D4ECF72D039F62EBB7477EA1FD4D63 N N 0.000000
alter user foo identified by password 'invalid';
select * from mysql.user where user = 'foo';
Host User Password Select_priv Insert_priv Update_priv Delete_priv Create_priv Drop_priv Reload_priv Shutdown_priv Process_priv File_priv Grant_priv References_priv Index_priv Alter_priv Show_db_priv Super_priv Create_tmp_table_priv Lock_tables_priv Execute_priv Repl_slave_priv Repl_client_priv Create_view_priv Show_view_priv Create_routine_priv Alter_routine_priv Create_user_priv Event_priv Trigger_priv Create_tablespace_priv Delete_history_priv ssl_type ssl_cipher x509_issuer x509_subject max_questions max_updates max_connections max_user_connections plugin authentication_string password_expired is_role default_role max_statement_time
% foo invalid N N N N N N N N N N N N N N N N N N N N N N N N N Y N N N N 0000 mysql_native_password invalid N N 0.000000
alter user foo identified with 'somecoolplugin'; ERROR HY000: Operation ALTER USER failed for 'foo'@'%'
show warnings;
Level Code Message Error1524 Plugin 'somecoolplugin' is not loaded Error1396 Operation ALTER USER failed for 'foo'@'%'
alter user foo identified with 'mysql_old_password';
select * from mysql.user where user = 'foo';
Host User Password Select_priv Insert_priv Update_priv Delete_priv Create_priv Drop_priv Reload_priv Shutdown_priv Process_priv File_priv Grant_priv References_priv Index_priv Alter_priv Show_db_priv Super_priv Create_tmp_table_priv Lock_tables_priv Execute_priv Repl_slave_priv Repl_client_priv Create_view_priv Show_view_priv Create_routine_priv Alter_routine_priv Create_user_priv Event_priv Trigger_priv Create_tablespace_priv Delete_history_priv ssl_type ssl_cipher x509_issuer x509_subject max_questions max_updates max_connections max_user_connections plugin authentication_string password_expired is_role default_role max_statement_time
% foo N N N N N N N N N N N N N N N N N N N N N N N N N Y N N N N 0000 mysql_old_password N N 0.000000
alter user foo identified with 'mysql_old_password' using '0123456789ABCDEF';
select * from mysql.user where user = 'foo';
Host User Password Select_priv Insert_priv Update_priv Delete_priv Create_priv Drop_priv Reload_priv Shutdown_priv Process_priv File_priv Grant_priv References_priv Index_priv Alter_priv Show_db_priv Super_priv Create_tmp_table_priv Lock_tables_priv Execute_priv Repl_slave_priv Repl_client_priv Create_view_priv Show_view_priv Create_routine_priv Alter_routine_priv Create_user_priv Event_priv Trigger_priv Create_tablespace_priv Delete_history_priv ssl_type ssl_cipher x509_issuer x509_subject max_questions max_updates max_connections max_user_connections plugin authentication_string password_expired is_role default_role max_statement_time
% foo 0123456789ABCDEF N N N N N N N N N N N N N N N N N N N N N N N N N Y N N N N 0000 mysql_old_password 0123456789ABCDEF N N 0.000000
#
# Test ssl related altering.
#
alter user foo identified by 'something' require SSL;
select * from mysql.user where user = 'foo';
Host User Password Select_priv Insert_priv Update_priv Delete_priv Create_priv Drop_priv Reload_priv Shutdown_priv Process_priv File_priv Grant_priv References_priv Index_priv Alter_priv Show_db_priv Super_priv Create_tmp_table_priv Lock_tables_priv Execute_priv Repl_slave_priv Repl_client_priv Create_view_priv Show_view_priv Create_routine_priv Alter_routine_priv Create_user_priv Event_priv Trigger_priv Create_tablespace_priv Delete_history_priv ssl_type ssl_cipher x509_issuer x509_subject max_questions max_updates max_connections max_user_connections plugin authentication_string password_expired is_role default_role max_statement_time
% foo *88C89BE093D4ECF72D039F62EBB7477EA1FD4D63 N N N N N N N N N N N N N N N N N N N N N N N N N Y N N N N ANY 0000 mysql_native_password *88C89BE093D4ECF72D039F62EBB7477EA1FD4D63 N N 0.000000
alter user foo identified by 'something' require X509;
select * from mysql.user where user = 'foo';
Host User Password Select_priv Insert_priv Update_priv Delete_priv Create_priv Drop_priv Reload_priv Shutdown_priv Process_priv File_priv Grant_priv References_priv Index_priv Alter_priv Show_db_priv Super_priv Create_tmp_table_priv Lock_tables_priv Execute_priv Repl_slave_priv Repl_client_priv Create_view_priv Show_view_priv Create_routine_priv Alter_routine_priv Create_user_priv Event_priv Trigger_priv Create_tablespace_priv Delete_history_priv ssl_type ssl_cipher x509_issuer x509_subject max_questions max_updates max_connections max_user_connections plugin authentication_string password_expired is_role default_role max_statement_time
% foo *88C89BE093D4ECF72D039F62EBB7477EA1FD4D63 N N N N N N N N N N N N N N N N N N N N N N N N N Y N N N N X509 0000 mysql_native_password *88C89BE093D4ECF72D039F62EBB7477EA1FD4D63 N N 0.000000
alter user foo identified by 'something'
require cipher 'text' issuer 'foo_issuer' subject 'foo_subject';
select * from mysql.user where user = 'foo';
Host User Password Select_priv Insert_priv Update_priv Delete_priv Create_priv Drop_priv Reload_priv Shutdown_priv Process_priv File_priv Grant_priv References_priv Index_priv Alter_priv Show_db_priv Super_priv Create_tmp_table_priv Lock_tables_priv Execute_priv Repl_slave_priv Repl_client_priv Create_view_priv Show_view_priv Create_routine_priv Alter_routine_priv Create_user_priv Event_priv Trigger_priv Create_tablespace_priv Delete_history_priv ssl_type ssl_cipher x509_issuer x509_subject max_questions max_updates max_connections max_user_connections plugin authentication_string password_expired is_role default_role max_statement_time
% foo *88C89BE093D4ECF72D039F62EBB7477EA1FD4D63 N N N N N N N N N N N N N N N N N N N N N N N N N Y N N N N SPECIFIED text foo_issuer foo_subject 0000 mysql_native_password *88C89BE093D4ECF72D039F62EBB7477EA1FD4D63 N N 0.000000
#
# Test resource limits altering.
#
alter user foo with MAX_QUERIES_PER_HOUR 10
MAX_UPDATES_PER_HOUR 20
MAX_CONNECTIONS_PER_HOUR 30
MAX_USER_CONNECTIONS 40;
select * from mysql.user where user = 'foo';
Host User Password Select_priv Insert_priv Update_priv Delete_priv Create_priv Drop_priv Reload_priv Shutdown_priv Process_priv File_priv Grant_priv References_priv Index_priv Alter_priv Show_db_priv Super_priv Create_tmp_table_priv Lock_tables_priv Execute_priv Repl_slave_priv Repl_client_priv Create_view_priv Show_view_priv Create_routine_priv Alter_routine_priv Create_user_priv Event_priv Trigger_priv Create_tablespace_priv Delete_history_priv ssl_type ssl_cipher x509_issuer x509_subject max_questions max_updates max_connections max_user_connections plugin authentication_string password_expired is_role default_role max_statement_time
% foo *88C89BE093D4ECF72D039F62EBB7477EA1FD4D63 N N N N N N N N N N N N N N N N N N N N N N N N N Y N N N N SPECIFIED text foo_issuer foo_subject 10203040 mysql_native_password *88C89BE093D4ECF72D039F62EBB7477EA1FD4D63 N N 0.000000
drop user foo;
#
# Bug #29882299: ALTER USER ... IDENTIFIED WITH ... BY ... SHOULD BE A PRIVILEGED OPERATION
#
create user foo@localhost;
connect x,localhost,foo;
alter user current_user identified with 'something'; ERROR42000: Access denied; you need (at least one of) the CREATE USER privilege(s) for this operation
connection default;
disconnect x;
drop user foo@localhost;
update mysql.global_priv set priv=@root_priv where user='root'and host='localhost';
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(vorverarbeitet am 2026-10-08)
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