Re: Mnogosearch (Was: Re: website doc search is ... )
От | Mark Kirkwood |
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Тема | Re: Mnogosearch (Was: Re: website doc search is ... ) |
Дата | |
Msg-id | 3FF3D4B1.2010607@paradise.net.nz обсуждение исходный текст |
Ответ на | Re: Mnogosearch (Was: Re: website doc search is ... ) ("Marc G. Fournier" <scrappy@postgresql.org>) |
Ответы |
Re: Mnogosearch (Was: Re: website doc search is ... )
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Список | pgsql-general |
Might be worth trying a larger statistics target (say 100), in the hope that the planner then has better information to work with. best wishes Mark Marc G. Fournier wrote: > >he problem is that right now, we look at the LIKE first, giving us ~300k >rows, and then search through those for those who have the word matching >... is there some way of reducing the priority of the LIKE part of the >query, as far as the planner is concerned, so that it will "resolve" the = >first, and then work the LIKE on the resultant set, instead of the other >way around? So that the query is only checking 15k records for the 13k >that match, instead of searching through 300k? > >I'm guessing that the reason that the LIKE is taking precidence(sp?) is >because the URL table has less rows in it then ndict8? > > > >
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