> -----Original Message-----
> From: Jay Pipes [mailto:jay@stripped]
> Sent: Friday, October 12, 2007 2:07 PM
> To: Daevid Vincent
> Cc: mysql@stripped
> Subject: Re: Need help with a "natural sort order" for
> version numbers and release code names
>
> Daevid Vincent wrote:
> >
> > I'm trying to get some 'release/version numbers' to sort properly.
> >
> > mysql> SELECT ReleaseID, Name FROM releases ORDER BY Name
> DESC;
> > +-----------+---------------------+
> > | ReleaseID | Name |
> > +-----------+---------------------+
> > | 18 | Unspecified |
> > | 20 | Next Patch |
> > | 58 | LOCset |
> > | 74 | Abashiri |
> > | 54 | 4.6.0 (Folsom) |
> > <-- 4.5.10
> should be here
> > | 99 | 4.5.9 |
> > | 98 | 4.5.6 |
> > | 93 | 4.5.5 (Purdy) |
> > | 97 | 4.5.4 |
> > | 96 | 4.5.3 |
> > | 94 | 4.5.2 |
> > | 100 | 4.5.10 | <-- should be ^ there
> > | 91 | 4.5.1 Deferred |
> > | 78 | 4.5.1 (Leavenworth) |
> > | 95 | 4.2.7.4 |
> > | 92 | 4.2.7.3 |
> > | 90 | 4.2.7.2 |
> > | 87 | 4.2.7.1 |
> > | 88 | 4.2.7.0 |
> >
> > I like this order, especially with the top four,
> > except for that 4.5.10 should be higher up,
> > just under 4.6.0, not under 4.5.2 as it is now.
> >
> > So I tried the " + 0 " trick which makes things even worse
> > (notice the 4.2.6.1 and 4.2.6.0 -- yipes!):
> >
> > mysql> SELECT ReleaseID, Name FROM releases ORDER BY Name + 0 DESC;
>
> > +-----------+---------------------+
> > | ReleaseID | Name |
> > +-----------+---------------------+
> >
> ....(18,20,58,74) are moved
> > :(
> > | 54 | 4.6.0 (Folsom) |
> > | 78 | 4.5.1 (Leavenworth) |
> > | 100 | 4.5.10 |
> > | 91 | 4.5.1 Deferred |
> > | 93 | 4.5.5 (Purdy) |
> > | 94 | 4.5.2 |
> > | 96 | 4.5.3 |
> > | 97 | 4.5.4 |
> > | 98 | 4.5.6 |
> > | 99 | 4.5.9 |
> > | 82 | 4.2.6.1 | << ?
> > | 76 | 4.2.2 |
> > | 75 | 4.2.4 |
> > | 72 | 4.2.1 |
> > | 73 | 4.2.3 |
> > | 67 | 4.2.6.0 | << ?
> >
> >
> > I'm pretty sure this is going to involve some sort of
> splitting the version
> > from the release codeword via some string functions, and
> then operating on that part.
> What about ORDER BY REPLACE(Name, '.', '') + 0 DESC?
Thanks for the tip Jay, but nope. It's all out of whack then.
mysql> SELECT ReleaseID, Name FROM releases ORDER BY REPLACE(Name, '.', '')
+ 0 DESC;
+-----------+---------------------+
| ReleaseID | Name |
+-----------+---------------------+
| 100 | 4.5.10 |
| 95 | 4.2.7.4 |
| 92 | 4.2.7.3 |
| 90 | 4.2.7.2 |
| 87 | 4.2.7.1 |
| 88 | 4.2.7.0 |
| 86 | 4.2.6.3 |
| 83 | 4.2.6.2 |
| 82 | 4.2.6.1 |
| 67 | 4.2.6.0 |
| 85 | 4.2.5.4 |
| 84 | 4.2.5.3 |
| 80 | 4.2.5.2 |
| 79 | 4.2.5.1 |
| 54 | 4.6.0 (Folsom) |
| 99 | 4.5.9 |
| 98 | 4.5.6 |
| 93 | 4.5.5 (Purdy) |
| 97 | 4.5.4 |
| 96 | 4.5.3 |
| 94 | 4.5.2 |
| 91 | 4.5.1 Deferred |
| 78 | 4.5.1 (Leavenworth) |
