One common problem that usually results in generating an extremely long
explain plan where the plan should not be that long is to end the SQL with a
semicolon and then follow the SQL statement with a "/". Basically you
double execute the explain and then attempt to query the result via a
connect by which can result in the ORA-01436 "CONNECT BY loop in user data"
error.

Since I upgraded to version 9.2 I have also been receiving ORA-00942 errors
whenever I explain an SQL statement that references a SYS owned base table.
A direct grant by sys eliminates this error.

HTH -- Mark D Powell --

-----Original Message-----
From: oracle-l-bounce@(protected)
[mailto:oracle-l-bounce@(protected)
Sent: Thursday, December 09, 2004 5:16 PM
To: SauerBL@(protected)
Subject: RE: Weird Behavior


Overquoted before. What I said was:
First:
=20
OS? OS version? Database version?
Always, always, always! ;-)

Second:

Define "fail", as used below. =20
Does it crash? If so, with what error?
Does it hang? If so, what's V$SESSION_WAIT
have to say about the session trying to do
the explain plan?


Hope that helps,

-Mark
> > I have two tables with basic views on top of them. And I=20
> > need to run some
> > basic
> > sql against the database.  The stuff you see in the body of=20
> > the explain plan.
> > Neither table is that big. About 2000 records in each of=20
> > them. The weird
> > part
> > is that even trying to run an explain plan locks up whatever=20
> > I'm running it
> > from. =20
> > =20
> > Does anybody have any idea what would make an explain plan=20
> > request fail and
> > what to do about it? =20
> > =20
> > Thanks, Ben
> > =20
> > This is what crashes. (With or without the first line) =20
> > [SMSYSPLAN is my
> > plan_table]
> > =20
> > explain plan set statement_id =3D 'cr_weird' into SMSYSPLAN for
> > SELECT
> >   Clients."Title", Clients."InActive:", Clients."Client=20
> Full Name",
> > Clients."Classification", Clients."Home Country Name",
> >   Incident."InActive:", Incident."Visit Date", Incident."GA=20
> > Host Text"
> > FROM
> >   "_SMDBA_"."Clients" Clients,
> >   "_SMDBA_"."Incident" Incident
> > WHERE
> >   Clients."Sequence" =3D Incident."Seq.Client" (+)
> > AND
> >   Incident."Visit Date" >=3D TO_DATE('2004-12-01 00:00:00',=20
> > 'YYYY-MM-DD
> > HH:MI:SS') AND
> >   Incident."Visit Date" < TO_DATE('2004-12-10 00:00:00',=20
> 'YYYY-MM-DD
> > HH:MI:SS') AND
> >   Clients."InActive:" =3D 0=20
> > AND
> >   Incident."InActive:" =3D 0
> > ORDER BY
> >   Clients."Classification" ASC
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