Re: Speeding up Query

>This is pretty horrid: you are generating a cross product of
>events * event_ref * teams * orgs * pers and then selecting rows
>multiple times out of that very large set.  No wonder you lost
>patience even with a small test database.  I think you wanted
>something like
>
>...
>INTERSECT (
>
>select events.id from events where
>(lower(events.head) like '%web%'
>   or lower(events.search) like '%web%'
>   or lower(events.ort) like '%web%'
>   or lower(events.text) like '%web%'
>
>union
>
>select teams.id from teams where
>lower(teams.name) like '%web%'
>
>union
>

Hi Tom,

this thing is a bit more complicated.

event_ref is the table containing the relations events <-> teams (One
event/multiple Teams)
Spoken: Teams or Persons organise Events,
that's what: (events.id = event_ref.event_id and event_ref.ref_id =
teams.id) is for.

Now, this search wants to be able to find all events that are
organised by teams, pers, orgs where teams,p,o name contains
"search_string".

But maybe you already brought the idea to me! Instead of using
pleanty of ORs I should try using plenty UNIONs.

Would it also possible to make multiple INTERSECTS?
How do these operate on each other, do I also use parentheses?

I am bit in a hurry, right in the moment that why I write stenograph! ;-)

Thank you in advance,

Alex









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