Oracle-L: Re: Clob indexes

From: Jonathan Lewis <jonathan_at_jlcomp.demon.co.uk>
Date: Tue, 23 Apr 2002 23:38:24 -0800
Message-ID: <F001.0044D561.20020423233824@fatcity.com>

It would make sense,

I would expect Oracle to take a shortcut with LOB Indexes, simply hard-coding the fact that access to the LOB should always be via the LOB index. Consequently there would be no point in thinking about them

You could run SQL_TRACE prior to the
dbms_stats call, and see if there is a
'bitand(flag,NNNN)' line in the query that identifies indexes that excludes LOB indexes.

Jonathan Lewis
http://www.jlcomp.demon.co.uk

Author of:
Practical Oracle 8i: Building Efficient Databases

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http://www.jlcomp.demon.co.uk/seminar.html

Host to The Co-Operative Oracle Users' FAQ http://www.jlcomp.demon.co.uk/faq/ind_faq.html

-----Original Message-----
To: Multiple recipients of list ORACLE-L <ORACLE-L_at_fatcity.com> Date: 23 April 2002 22:52

I've hit bug 1499329

As a workaround, I'm analysing the tables in the staging environment then I'm doing an exchange partition.

I can analyse the tables/indexes without problem in the staging environment.
My question is when creating a clob, Oracle creates a sys_...$$ indexes. When analysing the schema, those sys_...$$ indexes do not have any statistics. Is that normal ?

TIA
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Author: Jonathan Lewis
INET: jonathan_at_jlcomp.demon.co.uk

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