Here's my full test solution:
use test;
drop table if exists releases;
create temporary table releases
(
releaseid int(10) unsigned not null auto_increment primary key,
name varchar(255)
)engine=myisam;
insert into releases ( name ) values
( 'Unspecified' ),
( 'Next Patch' ),
( 'LOCset' ),
( 'Abashiri' ),
( '4.6.0 (Folsom)' ),
( '4.5.9' ),
( '4.5.6' ),
( '4.5.5 (Purdy)' ),
( '4.5.5' ),
( '4.5.4' ),
( '4.5.3' ),
( '4.5.2' ),
( '4.5.10' ),
( '4.5.1 Deferred' ),
( '4.5.1 (Leavenworth)' ),
( '4.2.7.4' ),
( '4.2.7.3' ),
( '4.2.7.2' ),
( '4.2.7.1' ),
( '4.2.7.0' );
select
releaseid,
name
from
releases
order by
case name
when 'Unspecified' then 0
when 'Next Patch' then 1
when 'LOCset' then 2
else 10
end,
if(
locate( ' ', name ) > 0 and locate( '.', name ) > 0,
inet_aton( substr( name, 1, locate( ' ', name ) - 1 ) ),
if(
locate( '.', name ) > 0,
inet_aton( name ),
4294967295 ) ) desc,
if(
locate( ' ', name ) > 0 and locate( '.', name ) > 0,
replace( replace( substr( name, locate( ' ', name ) + 1 ), '(',
'' ), ')', '' ),
if(
locate( '.', name ) = 0,
name,
null ) );
This is the end result after talking to Daevid and finding out what
the ultimate goal was. I think it's kind of clever myself :)
Yes, there's no possibility of indexing here, but it gets the job done.
Adam.
On Oct 12, 2007, at 12:39 PM, 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.
D.Vin
http://daevid.com
---
eval() is my favorite templating engine.
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Adam Randall
[EMAIL PROTECTED]
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