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Greetings,
I recently ran across this problem when using a very long database name.
As I understand it, the database name can be as long as you want depending
on your platform. I am not sure of the max size of a Linux directory off
the top of my head but I know it can be very long.
So the proof-of-concept below illustrates my problem. I have a
46-character database name:
"this_is_a_really_really_long_table_that_breaks".
When I attempt to perform access control, using the mysql.db table, my
entry gets truncated down to 32 characters
("this_is_a_really_really_long_tab") since the mysql.db Db field is set to
be 32 at most.
So I'm assuming this is done for OS's that have a small limit (Windows
comes to mind but again, I'm not positive). So my question is: If I
alter this size to say, 64 characters... would that break anything
internally?
I'm assuming that it will not but haven't looked at the source code yet.
For the record, I am using 3.22.32 on Linux 2.2.x.
Any insight would be appreciated. I can easily tweak this myself but I
wanted to make sure that nothing "internal" would break as a result.
Cheers,
Ryan
+-- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --+
Ryan W. Maple "I dunno, I dream in Perl sometimes..." -LW
Guardian Digital, Inc. ryan@stripped
+-- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --- --+
- ----- BEGIN PROOF OF CONCEPT -----
mysql> SHOW DATABASES;
+------------------------------------------------+
| Database |
+------------------------------------------------+
| mysql |
| this_is_a_really_really_long_table_that_breaks |
+------------------------------------------------+
5 rows in set (0.00 sec)
mysql> SELECT User, Host, DB FROM mysql.db;
+------------+-----------+----------------------------------+
| User | Host | DB |
+------------+-----------+----------------------------------+
| root | localhost | this_is_a_really_really_long_tab |
+------------+-----------+----------------------------------+
3 rows in set (0.00 sec)
mysql> DESCRIBE mysql.db;
+-----------------+---------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-----------------+---------------+------+-----+---------+-------+
| Host | char(60) | | PRI | | |
| Db | char(32) | | PRI | | |
| User | char(16) | | PRI | | |
| Select_priv | enum('N','Y') | | | N | |
| Insert_priv | enum('N','Y') | | | N | |
| Update_priv | enum('N','Y') | | | N | |
| Delete_priv | enum('N','Y') | | | N | |
| Create_priv | enum('N','Y') | | | N | |
| Drop_priv | enum('N','Y') | | | N | |
| Grant_priv | enum('N','Y') | | | N | |
| References_priv | enum('N','Y') | | | N | |
| Index_priv | enum('N','Y') | | | N | |
| Alter_priv | enum('N','Y') | | | N | |
+-----------------+---------------+------+-----+---------+-------+
13 rows in set (0.00 sec)
- ----- END PROOF OF CONCEPT -----
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