Re: auto_increment weirdness

2010-02-19 Thread Ananda Kumar
what is the value u see when you execute
select max(b) from y;

On Thu, Feb 18, 2010 at 1:33 PM, Gavin Towey  wrote:

> Reproduced in 5.1.43.  Could not reproduce it in 5.0.66
>
>
> -Original Message-
> From: Yang Zhang [mailto:yanghates...@gmail.com]
> Sent: Wednesday, February 17, 2010 6:05 PM
> To: mysql@lists.mysql.com
> Subject: auto_increment weirdness
>
> Hi, for some reason, I have an auto_increment field that's magically
> bumped up to the next biggest power of 2 after a big INSERT...SELECT
> that inserts a bunch of tuples (into an empty table). Is this expected
> behavior? I couldn't find any mention of this from the docs (using the
> MySQL 5.4.3 beta).
>
> Small reproducible test case:
>
> First, generate some data: from bash, run "seq 3 > /tmp/seq"
>
> Next, run this in mysql:
>
> create table x (a int auto_increment primary key, b int);
> create table y (b int);
> load data infile '/tmp/seq' into table y;
> insert into x (b) select b from y;
> show create table x;
>
> This will show auto_increment = 32768 instead of 3.
>
> Is this a bug introduced in the beta? Has it been fixed in newer
> releases? Couldn't find a mention in the bug database. Thanks in
> advance.
> --
> Yang Zhang
> http://www.mit.edu/~y_z/
>
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RE: auto_increment weirdness

2010-02-18 Thread Gavin Towey
Reproduced in 5.1.43.  Could not reproduce it in 5.0.66


-Original Message-
From: Yang Zhang [mailto:yanghates...@gmail.com]
Sent: Wednesday, February 17, 2010 6:05 PM
To: mysql@lists.mysql.com
Subject: auto_increment weirdness

Hi, for some reason, I have an auto_increment field that's magically
bumped up to the next biggest power of 2 after a big INSERT...SELECT
that inserts a bunch of tuples (into an empty table). Is this expected
behavior? I couldn't find any mention of this from the docs (using the
MySQL 5.4.3 beta).

Small reproducible test case:

First, generate some data: from bash, run "seq 3 > /tmp/seq"

Next, run this in mysql:

create table x (a int auto_increment primary key, b int);
create table y (b int);
load data infile '/tmp/seq' into table y;
insert into x (b) select b from y;
show create table x;

This will show auto_increment = 32768 instead of 3.

Is this a bug introduced in the beta? Has it been fixed in newer
releases? Couldn't find a mention in the bug database. Thanks in
advance.
--
Yang Zhang
http://www.mit.edu/~y_z/

--
MySQL General Mailing List
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To unsubscribe:http://lists.mysql.com/mysql?unsub=gto...@ffn.com


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individual named.  If you are not the named addressee, you are notified that 
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strictly prohibited.  Please notify the sender immediately by e-mail if you 
have received this e-mail by mistake and delete this e-mail from your system. 
E-mail transmission cannot be guaranteed to be secure or error-free as 
information could be intercepted, corrupted, lost, destroyed, arrive late or 
incomplete, or contain viruses. The sender therefore does not accept liability 
for any loss or damage caused by viruses or errors or omissions in the contents 
of this message, which arise as a result of e-mail transmission. [FriendFinder 
Networks, Inc., 220 Humbolt court, Sunnyvale, CA 94089, USA, FriendFinder.com

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