mariadb/mysql-test/main/grant_4332.test

#
# MDEV-4332 Increase username length from 16 characters
#
# test that when ALTER-ing tables to have short usernames,
# the server switches to short usernames internally too.
#

--source include/not_embedded.inc
--source include/switch_to_mysql_user.inc
set global sql_mode="";
set local sql_mode="";

alter table mysql.user modify User char(16) binary not null default '';
alter table mysql.db modify User char(16) binary not null default '';
alter table mysql.tables_priv modify User char(16) binary not null default '';
alter table mysql.columns_priv modify User char(16) binary not null default '';
alter table mysql.procs_priv modify User char(16) binary not null default '';
alter table mysql.proc modify definer char(77) collate utf8_bin not null default '';
alter table mysql.event modify definer char(77) collate utf8_bin not null default '';
flush privileges;

--enable_metadata
select user();
--disable_metadata

--error ER_WRONG_STRING_LENGTH
create user a17aaaaaaaaaaaaa0@localhost;
--error ER_WRONG_STRING_LENGTH
grant usage on *.* to a17aaaaaaaaaaaaa0@lodalhost;
--error ER_WRONG_STRING_LENGTH
drop user a17aaaaaaaaaaaaa0@lodalhost;

alter table mysql.user modify User char(80) binary not null default '';
alter table mysql.db modify User char(80) binary not null default '';
alter table mysql.tables_priv modify User char(80) binary not null default '';
alter table mysql.columns_priv modify User char(80) binary not null default '';
alter table mysql.procs_priv modify User char(80) binary not null default '';
alter table mysql.proc modify definer char(141) collate utf8_bin not null default '';
alter table mysql.event modify definer char(141) collate utf8_bin not null default '';
flush privileges;

--enable_metadata
select user();
--disable_metadata

set global sql_mode=default;
--source include/switch_to_mysql_global_priv.inc