Re: Rebuilding Indexes...

Ohhh, something else I didn't know yet!

Which is why I keep reading this list.

That, and playing referee. ;)

Jared

On Saturday 28 December 2002 17:48, Arup Nanda wrote:
> In 9.2, you can keep the index by using the KEEP INDEX key words.
>
> ALTER TABLE XXX DROP CONSTRAINT PK_XXX KEEP INDEX
>
> This will keep the index but drop the constraint. Talk about having your
> cake and eating it too...;)
>
> HTH
>
> Arup
> ----- Original Message -----
> To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com>
> Sent: Friday, December 27, 2002 4:39 PM
>
> > it'll have to wait until Monday, I'm not at work until then. I'll try
> > it with a non-unique then
> >
> > Hey, if it works, it saves me tons of time, I learn something new and I
> > had fun developing the single SQL statement to rebuild the constraint
> > and index. Win-win
> >
> >
> > Rachel
> >
> > --- Denny Koovakattu <groups_at_koovakattu.com> wrote:
> > > I don't have access to 9.2.0.1 right now. But can you try creating
> > > a non-
> > > unique index instead of the unique index. If you create a unique
> > > index, it gets
> > > dropped. That's the behavior on 8.1.x also. But if it's a non-unique
> > > index, it
> > > shouldn't get dropped.
> > >
> > > Regards,
> > > Denny
> > >
> > > Quoting Rachel Carmichael <wisernet100_at_yahoo.com>:
> > > > 9.2.0.1 Solaris, and yes, it does drop it
> > > >
> > > > I created a unique index in the primary key columns
> > > > I created the primary key constraint without specifying an index
> > > > I checked that the index existed, it did
> > > > I dropped the primary key constraint
> > > > I checked that the index existed, it didn't
> > > >
> > > > try it.... I tried various combinations before posting this note
> > > >
> > > > --- Denny Koovakattu <groups_at_koovakattu.com> wrote:
> > > > > If you build a separate index to enforce the primary key,
> > >
> > > Oracle
> > >
> > > > > shouldn't
> > > > > drop it when you disable or drop the primary key.
> > > > >
> > > > > Regards,
> > > > > Denny
> > > > >
> > > > > Quoting Rachel Carmichael <wisernet100_at_yahoo.com>:
> > > > > > Here's a reason:
> > > > > >
> > > > > > have you ever tried to find the three duplicate rows in a 12
> > > > >
> > > > > million
> > > > >
> > > > > > row table without using the primary key constraint? I've had to
> > > > > > disable
> > > > > > or drop the constraint in order to use the exceptions table.
> > >
> > > Once
> > >
> > > > I
> > > >
> > > > > do
> > > > >
> > > > > > that, even if I've built a separate index that enforces the
> > > >
> > > > primary
> > > >
> > > > > > key
> > > > > > constraint, Oracle drops the index. So I HAVE to rebuild it. If
> > >
> > > I
> > >
> > > > > > allow
> > > > > > the index to be rebuilt when I re-enable the primary key
> > > > >
> > > > > constraint,
> > > > >
> > > > > > it
> > > > > > builds it in the default tablespace of the table owner, not
> > >
> > > where
> > >
> > > > I
> > > >
> > > > > > want it.
> > > > > >
> > > > > > if anyone has a better way to fix this problem, I'm more than
> > > >
> > > > happy
> > > >
> > > > > to
> > > > >
> > > > > > hear it! It's a data warehouse and the third party app has a
> > >
> > > bug
> > >
> > > > we
> > > >
> > > > > > can't find and on occasion sqlloads (via direct path) duplicate
> > > > >
> > > > > rows
> > > > >
> > > > > > Rachel
> > > > > >
> > > > > > --- Jared Still <jkstill_at_cybcon.com> wrote:
> > > > > > > Though I have published a script for determining indexes that
> > > > > > > need to be rebuilt, and then rebuilding them, I have to say
> > > >
> > > > that
> > > >
> > > > > > > this is almost never necessary.
> > > > > > >
> > > > > > > Why are you rebuilding indexes? About the only reason for
> > >
> > > ever
> > >
> > > > > > > doing so is that the BLEVEL >= 5.
> > > > > > >
> > > > > > > goto asktom.oracle.com, and do a search on 'index rebuild'.
> > > > > > >
> > > > > > > Currently, the third article may be of interest.
> > > > > > >
> > > > > > > Jared
> > > > > > >
> > > > > > > On Thursday 26 December 2002 12:24, Richard Huntley wrote:
> > > > > > > > Anyone have any useful scripts for doing this?
> > > > > > > >
> > > > > > > > TIA,
> > > > > > > > Rich
> > > > > > >
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-- 
Please see the official ORACLE-L FAQ: http://www.orafaq.net
-- 
Author: Jared Still
  INET: jkstill_at_cybcon.com

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