Re: Indexing a CLOB

From: z b <>
Date: Thu, 12 Feb 2009 12:43:33 -0500
Message-ID: <>

What exactly is slow?

Context is used to search within lobs - probably not relevant here.

Try caching the lob.

alter table <table> modify lob (lob_name) (cache);

On Thu, Feb 12, 2009 at 11:40 AM, Ben Wittmeier <> wrote:
> We need to increase the size of a data field beyond its varchar2(4000)
> definition because 4000 characters isn't large enough. The field is
> currently not indexed. The developer has done some initial testing with
> CLOB's but found the performance with the CLOB seemed slow so he's
> wondering about an index on the field. Though he also said the slow
> performance may be a result of the way he's doing things with the CLOB
> (as this is new to him). Are there any options available to index the
> CLOB field to improve performance? Oracle mentions using a CONTEXT
> index....
> Does anyone have any thoughts on indexing CLOB fields?
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Received on Thu Feb 12 2009 - 11:43:33 CST

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