config root man

#
# Test the limits of a file-per-table tablespace name.  MySQL combines
# the database name with the table name to make a unique table name.
#
SET default_storage_engine=InnoDB;
#
# MySQL limits each database and tablename identifier to 64 characters
# of up to 3 bytes per character, corresponding to 192 bytes.
#
CREATE DATABASE `this_sixty_five_byte_name_is_too_long____________________________`;
ERROR 42000: Identifier name 'this_sixty_five_byte_name_is_too_long____________________________' is too long
CREATE DATABASE `this_sixty_four_byte_name_is_not_too_long_______________________`;
USE `this_sixty_four_byte_name_is_not_too_long_______________________`;
#
# A 64 character tablename can be created in a 64 character database name
#
CREATE TABLE `this_sixty_four_byte_name_is_not_too_long_______________________`.`this_sixty_four_byte_name_is_not_too_long_______________________` (a SERIAL);
#
# A 65 character tablename is too long.
#
CREATE TABLE `test`.`this_sixty_five_byte_name_is_too_long____________________________` (a SERIAL);
ERROR 42000: Identifier name 'this_sixty_five_byte_name_is_too_long____________________________' is too long
CREATE TABLE `this_sixty_four_byte_name_is_not_too_long_______________________`.`this_sixty_five_byte_name_is_too_long____________________________` (a SERIAL);
ERROR 42000: Identifier name 'this_sixty_five_byte_name_is_too_long____________________________' is too long
#
# Show the successfully created database and table
#
SHOW CREATE TABLE `this_sixty_four_byte_name_is_not_too_long_______________________`.`this_sixty_four_byte_name_is_not_too_long_______________________`;
Table	Create Table
this_sixty_four_byte_name_is_not_too_long_______________________	CREATE TABLE `this_sixty_four_byte_name_is_not_too_long_______________________` (
  `a` bigint(20) unsigned NOT NULL AUTO_INCREMENT,
  UNIQUE KEY `a` (`a`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1
---- list_files MYSQLD_DATADIR/this_sixty_four_byte_name_is_not_too_long_______________________
db.opt
this_sixty_four_byte_name_is_not_too_long_______________________.frm
this_sixty_four_byte_name_is_not_too_long_______________________.ibd
SELECT name FROM information_schema.innodb_sys_tables WHERE name LIKE '%long%';
name
this_sixty_four_byte_name_is_not_too_long_______________________/this_sixty_four_byte_name_is_not_too_long_______________________
SELECT name FROM information_schema.innodb_sys_tablespaces WHERE name LIKE '%long%';
name
this_sixty_four_byte_name_is_not_too_long_______________________/this_sixty_four_byte_name_is_not_too_long_______________________
SELECT path FROM information_schema.innodb_sys_datafiles WHERE path LIKE '%long%';
path
./this_sixty_four_byte_name_is_not_too_long_______________________/this_sixty_four_byte_name_is_not_too_long_______________________.ibd
SELECT file_name, tablespace_name FROM information_schema.files WHERE file_name LIKE '%long%';
file_name	./this_sixty_four_byte_name_is_not_too_long_______________________/this_sixty_four_byte_name_is_not_too_long_______________________.ibd
tablespace_name	innodb_file_per_table_##
#
# Cleanup
#
DROP DATABASE `this_sixty_four_byte_name_is_not_too_long_______________________`;