Re: [SQL] Joining bug????
| От | Gene Selkov Jr. |
|---|---|
| Тема | Re: [SQL] Joining bug???? |
| Дата | |
| Msg-id | 199810270417.WAA27985@antares.mcs.anl.gov обсуждение исходный текст |
| Ответ на | Joining bug???? (pierre <pierre@desertmoon.com>) |
| Ответы |
Re: [SQL] Joining bug????
|
| Список | pgsql-sql |
> I've been attempting to get my DB tuned to handle joins as best as > possible. However, no matter which way I try to perform the joins, if I > attempt to join more than two or three tables the joins becomes > unbearably long not matter how many indexes I create in however many ways. Ditto. Never saw a quadruple join succeed, even with relatively small tables. > My only solution was to create a hybrid table that contains the join of > all of the tables I'm searching on with multi-keyed indexes. This is a > VERY kludgy solution that makes changing the keys to my DB hard to change. The solution I use may be the worst imaginable kludge, but it works great: I do the joins (as well as other set operations)on the client side. Perl hashes are very good for that. --Gene
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