select @@ignore_db_dirs;
@@ignore_db_dirs
e,lost+found,.mysqlgui,test
# Check that SHOW DATABASES ignores all directories from
# @@ignore_db_dirs and all directories with names starting
# with '.'
SHOW DATABASES;
Database
information_schema
mtr
mysql
performance_schema
SET @@global.ignore_db_dirs = 'aha';
ERROR HY000: Variable 'ignore_db_dirs' is a read only variable
SET @@local.ignore_db_dirs = 'aha';
ERROR HY000: Variable 'ignore_db_dirs' is a read only variable
SET @@ignore_db_dirs = 'aha';
ERROR HY000: Variable 'ignore_db_dirs' is a read only variable