-none- 2007-10-12 - By Adam Randall
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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.
>
>
>
> --
> MySQL General Mailing List
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> To unsubscribe: http://lists.mysql.com/mysql?unsub=randalla@(protected)
>
--
Adam Randall
randalla@(protected)
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