|Subject||RE: [firebird-support] FB 2.0 optimizer dogging us|
> At time the PK constraint (and his index) is created there was no datainside the tables.
OK, that makes sense. Too bad the engine can't do this on its own. But
I guess since it has to be done just once, the burden should really be
on the DBA.
[mailto:firstname.lastname@example.org] On Behalf Of Arno Brinkman
Sent: Friday, December 01, 2006 11:34 AM
Subject: Re: [firebird-support] FB 2.0 optimizer dogging us
>I think you solved it, now FB2 is coming up with good plans. Now theBecause you first created all metadata and imported the data after that.
>question is, why do all my primary key indices have no statistics
>computed for them?
I Assume you first created the tables with only the PK's, then filled
with data, then created foreign-keys / indexes.
When an index is created the statistics value is computed, thus when the
foreign-keys/indexes were created there was real data to compute that
At time the PK constraint (and his index) is created there was no data
inside the tables.
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