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Re: Working with BLOBS

From: Daniel Morgan <damorgan_at_x.washington.edu>
Date: Mon, 10 Nov 2003 12:49:18 -0800
Message-ID: <1068497379.332793@yasure>


Daniel Morgan wrote:

> Jeremy wrote:
>
>> Hi - PL/SQL Oracle 8i (8.1.7)
>>
>> We have a document stored in a BLOB. We know this is an RTF (rich
>> text format) and it contains 'placeholders' (e.g. [last_name] which
>> we then wish to substitute with the person's name).
>>
>> So we read the BLOB into a PL/SQL block - what is the most
>> efficient/easiest way of performing our string replacements?
>>
>> If it were in a varchar2, we could simply say
>>
>> l_doc := replace(l_doc,'[last_name]',l_last_name);
>>
>> Is there an equivalent with BLOBS? Or do I need to read it in chunks
>> into a varchar2, process it and then reassemble it as a new BLOB?
>>
>> Thanks for any pointeres here....
>>
>>
>>
> BLOB or CLOB? Because I don't think you'll find doing string
> replacements in BLOBs
> a particularly enjoyable activity.
>
> Either way ... the functionality is contained in the DBMS_LOB built-in
> package.
> Documentation is available at http://tahiti.oracle.com.
>

Didn't notice your refernce to RTF. If RTF then likely it is BLOB and your editing, in the
database, far more problematic. Take a look at the DBMS_LOB package but I can't say
from experience it will solve the problem.

-- 
Daniel Morgan
http://www.outreach.washington.edu/ext/certificates/oad/oad_crs.asp
http://www.outreach.washington.edu/ext/certificates/aoa/aoa_crs.asp
damorgan_at_x.washington.edu
(replace 'x' with a 'u' to reply)
Received on Mon Nov 10 2003 - 14:49:18 CST

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