Bug #20026 FEDERATED lacks support for auto_increment_increment and auto_increment_offset
Submitted: 23 May 2006 19:34 Modified: 2 Jan 2007 15:52
Reporter: Guilhem Bichot Email Updates:
Status: Verified Impact on me:
None 
Category:MySQL Server: Federated storage engine Severity:S3 (Non-critical)
Version:5.1-bk OS:Linux (linux)
Assigned to: CPU Architecture:Any
Triage: Triaged: D3 (Medium)

[23 May 2006 19:34] Guilhem Bichot
Description:
have not tested with earlier versions.
Modify federated.test like this:
===== t/federated.test 1.24 vs edited =====
*** /home/mysql_src/mysql-5.1-new/BitKeeper/tmp/bk_federated.test-1.24_CPRbXV   2006-03-07 20:00:41 +01:00
--- edited/t/federated.test     2006-05-13 13:58:31 +02:00
***************
*** 153,158 ****
--- 153,159 ----
    ENGINE="FEDERATED" DEFAULT CHARSET=latin1
    CONNECTION='mysql://root@127.0.0.1:$SLAVE_MYPORT/federated/t1';

+ set auto_increment_increment=20;
  INSERT INTO federated.t1 (name, other) VALUES ('First Name', 11111);
  INSERT INTO federated.t1 (name, other) VALUES ('Second Name', 22222);
  INSERT INTO federated.t1 (name, other) VALUES ('Third Name', 33333);

and observe that the output of the SELECT which comes next:
...
INSERT INTO federated.t1 (name, other) VALUES ('Ninth Name', 99999);
INSERT INTO federated.t1 (name, other) VALUES ('Tenth Name', 101010);

# basic select
SELECT * FROM federated.t1;

does not change, that is the INSERTs have still used values 1,2,3 etc
for the auto_increment column instead of the expectable 1,21,41,etc.

I can understand why it's like this (honouring
auto_increment_increment and auto_increment_offset would require
passing their values to the remote mysqld), but I couldn't find it in
the "federated engine limitations" section of our manual.
There may be other variables with the same problem, haven't searched.

Is it a bug to fix or a limitation to document?
Filing a bug report here at PatrickG's request.

How to repeat:
see description