2010/4/26 Bruce Momjian <bruce@xxxxxxxxxx>: > 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 -- Sent via pgsql-general mailing list (pgsql-general@xxxxxxxxxxxxxx) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-general
