And what's saying the optimizer? EXPLAIN PLAN... pls.
Where are your indexes?
oli.=20
On Tue, 17 Oct 2000, Blum, Marc wrote:
> Dear all,
>=20
> we have a rather complex View containing several UNIONs and 5-7 tables pe=
r
> FROM-clause. Now if I query
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> SELECT ...
> FROM my_view
> WHERE attribute =3D 'abc'
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> the parsing may need 1s. Execution about 0.5s. If I query=20
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> SELECT ...
> FROM my_view
> WHERE other_attribute =3D 'xyz' =20
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> the parsing needs 30-45s. Execution about 0.5s. Now I don't want anybody =
to
> understand our data model or that view. But does anyone has any hints, wh=
ere
> to start searching? Any experience with such exorbitant parsing?
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> Thanx in advance
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>=20
> Mit freundlichen Gr=FC=DFen
>=20
> i.A. Marc Blum
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> SOPTIM GmbH
> Gr=FCner Weg 22-24
> D-52070 Aachen
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> Telefon:=09+49 241 / 9 18 79-33
> Fax:=09+49 241 / 15 40 38
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> mailto:marc.blum_at_soptim.de
> http://www.soptim.de
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>=20
> --
> Please see the official ORACLE-L FAQ: http://www.orafaq.com
> --
> Author: Blum, Marc
> INET: blum_at_soptim.de
>=20
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Received on Tue Oct 17 2000 - 11:42:29 CDT
