Mark Johnson <[EMAIL PROTECTED]> writes:
>> I'm really beginning to wonder if we need to write special SQL
>> based on the database we're using in order to tune the performance
>> because of issues like this? Yes, I know that that sort of defeats
>> the purpose of using a library like GDA, but if GDA can't form
>> an optimal query then it might behoove us to do the right thing
>> rather than hope they do.
>>
> I hope not, but we are talking not about minor differences in
> performance, but orders of magnitude. I was absolutely floored at
> MySql's performance with sub-queries. I do have a couple of things to
> try with it, though:
> 1. creation of a secondary index on slots.obj_guid
> 2. There is a section of the MySql manual on optimizing this stuff.
> Maybe it has something helpful.
Exactly. If it were just a minor difference then I just wouldn't
care, but the difference between seconds and minutes is sufficiently
large that we may need to work around the issue ourselves.
-derek
--
Derek Atkins, SB '93 MIT EE, SM '95 MIT Media Laboratory
Member, MIT Student Information Processing Board (SIPB)
URL: http://web.mit.edu/warlord/ PP-ASEL-IA N1NWH
[EMAIL PROTECTED] PGP key available
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