Re: Inheritance efficiency

2010/4/26 Bruce Momjian <bruce(at)momjian(dot)us>:
> Vincenzo Romano wrote:
>> Hi all.
>>
>> I'm wondering how efficient the inheritance can be.
>> I'm using the constraint exclusion feature and for each child table
>> (maybe but one) I have a proper CHECK constraint.
>> How efficient can the query planner be in choosing the right child
>> tables in the case of, say, thousands of them?
>> Would the selection process behave linearly, logarithmically or what?
>
> It is fine for dozens of child tables, but not thousands; it does need
> improvement.

This sounds like "linear" algorithms. Doesn't it?

>> And now it comes to my mind the same question for partial indexes.
>> That is, if I had a lot (really a lot) of small partial indexes over a
>> very large table, how efficient can the query planner be
>> in selecting the right indexes?

No info about this point (partial indexes)?
Is also this geared with linear algorithms ?

--
Vincenzo Romano
NotOrAnd Information Technologies
NON QVIETIS MARIBVS NAVTA PERITVS