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select @@ignore_db_dirs;
@@ignore_db_dirs
e,lost+found,.mysqlgui,ignored_db
# Check that SHOW DATABASES ignores all directories from
# @@ignore_db_dirs and all directories with names starting
# with '.'
SHOW DATABASES;
Database
information_schema
#mysql50#.otherdir
mtr
mysql
performance_schema
test
USE ignored_db;
ERROR 42000: Incorrect database name 'ignored_db'
SELECT * FROM ignored_db.t1;
ERROR 42000: Incorrect database name 'ignored_db'
CALL ignored_db.p1();
ERROR 42000: Incorrect database name 'ignored_db'
SELECT COUNT(*) FROM INFORMATION_SCHEMA.SCHEMATA WHERE SCHEMA_NAME='ignored_db';
COUNT(*)
1
CREATE DATABASE ignored_db;
ERROR 42000: Incorrect database name 'ignored_db'
CREATE DATABASE `lost+found`;
USE `lost+found`;
CREATE TABLE t1(id INT);
INSERT INTO t1 VALUES (1), (2);
SELECT * FROM `lost+found`.t1;
id
1
2
SHOW DATABASES;
Database
information_schema
#mysql50#.otherdir
lost+found
mtr
mysql
performance_schema
test
DROP DATABASE `lost+found`;
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
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