Re: Recognizing range constraints (was Re: Plan for relatively simple query seems to be very inefficient)
| От | Mischa |
|---|---|
| Тема | Re: Recognizing range constraints (was Re: Plan for relatively simple query seems to be very inefficient) |
| Дата | |
| Msg-id | 1112909198.4255a58eae0d8@webmail.telus.net обсуждение исходный текст |
| Ответ на | Re: Recognizing range constraints (was Re: Plan for relatively simple query seems to be very inefficient) (Tom Lane) |
| Ответы |
Re: Recognizing range constraints (was Re: Plan for relatively simple query seems to be very inefficient)
(Tom Lane)
|
| Список | pgsql-performance |
Дерево обсуждения
Plan for relatively simple query seems to be very inefficient
(Arjen van der Meijden,
)
Re: Plan for relatively simple query seems to be very inefficient (Steve Atkins, )
Re: Plan for relatively simple query seems to be very inefficient (Arjen van der Meijden, )
Re: Plan for relatively simple query seems to be very inefficient (Tom Lane, )
Re: Plan for relatively simple query seems to be very inefficient (Arjen van der Meijden, )
Re: Plan for relatively simple query seems to be very inefficient (Tom Lane, )
Recognizing range constraints (was Re: Plan for relatively simple query seems to be very inefficient) (Tom Lane, )
Re: [HACKERS] Recognizing range constraints (was Re: Plan for relatively simple query seems to be very inefficient) ("Jim C. Nasby", )
Re: [HACKERS] Recognizing range constraints (was Re: Plan for relatively simple query seems to be very inefficient) (Tom Lane, )
Re: [HACKERS] Recognizing range constraints (was Re: Plan (John A Meinel, )
Re: [HACKERS] Recognizing range constraints (was Re: Plan for relatively simple query seems to be very inefficient) (Tom Lane, )
Re: [HACKERS] Recognizing range constraints (was Re: Plan for relatively simple query seems to be very inefficient) ("Jim C. Nasby", )
Re: Recognizing range constraints (was Re: Plan for (Simon Riggs, )
Re: Recognizing range constraints (was Re: Plan for relatively simple query seems to be very inefficient) (Bruno Wolff III, )
Re: Recognizing range constraints (was Re: Plan for relatively simple query seems to be very inefficient) (Tom Lane, )
Re: Recognizing range constraints (was Re: Plan for relatively simple query seems to be very inefficient) (Mischa, )
Re: Recognizing range constraints (was Re: Plan for relatively simple query seems to be very inefficient) (Tom Lane, )
Re: Recognizing range constraints (was Re: Plan for relatively simple query seems to be very inefficient) (, )
Re: Plan for relatively simple query seems to be very inefficient ("Dave Held", )
Re: Plan for relatively simple query seems to be very inefficient (Tom Lane, )
Re: Plan for relatively simple query seems to be very inefficient (Tom Lane, )
Re: Plan for relatively simple query seems to be very inefficient (Mischa, )
Re: Plan for relatively simple query seems to be very inefficient (Steve Atkins, )
Re: Plan for relatively simple query seems to be very inefficient (Arjen van der Meijden, )
Re: Plan for relatively simple query seems to be very inefficient (Tom Lane, )
Re: Plan for relatively simple query seems to be very inefficient (Arjen van der Meijden, )
Re: Plan for relatively simple query seems to be very inefficient (Tom Lane, )
Recognizing range constraints (was Re: Plan for relatively simple query seems to be very inefficient) (Tom Lane, )
Re: [HACKERS] Recognizing range constraints (was Re: Plan for relatively simple query seems to be very inefficient) ("Jim C. Nasby", )
Re: [HACKERS] Recognizing range constraints (was Re: Plan for relatively simple query seems to be very inefficient) (Tom Lane, )
Re: [HACKERS] Recognizing range constraints (was Re: Plan (John A Meinel, )
Re: [HACKERS] Recognizing range constraints (was Re: Plan for relatively simple query seems to be very inefficient) (Tom Lane, )
Re: [HACKERS] Recognizing range constraints (was Re: Plan for relatively simple query seems to be very inefficient) ("Jim C. Nasby", )
Re: Recognizing range constraints (was Re: Plan for (Simon Riggs, )
Re: Recognizing range constraints (was Re: Plan for relatively simple query seems to be very inefficient) (Bruno Wolff III, )
Re: Recognizing range constraints (was Re: Plan for relatively simple query seems to be very inefficient) (Tom Lane, )
Re: Recognizing range constraints (was Re: Plan for relatively simple query seems to be very inefficient) (Mischa, )
Re: Recognizing range constraints (was Re: Plan for relatively simple query seems to be very inefficient) (Tom Lane, )
Re: Recognizing range constraints (was Re: Plan for relatively simple query seems to be very inefficient) (, )
Re: Plan for relatively simple query seems to be very inefficient ("Dave Held", )
Re: Plan for relatively simple query seems to be very inefficient (Tom Lane, )
Re: Plan for relatively simple query seems to be very inefficient (Tom Lane, )
Re: Plan for relatively simple query seems to be very inefficient (Mischa, )
Quoting Tom Lane <>: > Yeah, the whole thing is only a heuristic anyway. I've been coming > around to the view that relation membership shouldn't matter, because > of cases like > > WHERE a.x > b.y AND a.x < 42 > > which surely should be taken as a range constraint. Out of curiosity, will the planner induce "b.y < 42" out of this? -- "Dreams come true, not free."
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