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Question about BITSTREAM()

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ernest-ter.kuile

Posted: Thu Jun 27, 2002 2:59 am Post subject: Question about BITSTREAM()

Apprentice

Joined: 13 May 2002
Posts: 49
Location: KLM Holland

I have an MRM which is basicaly in the form of
InputRoot.MRM.HEADER
InputRoot.MRM.PAYLOAD

I want to save the PAYLOAD without the header, but when I try

BITSTREAM(InputRoot.MRM.PAYLOAD);

I get a BLOB containing the whole MRM as if I did a
BITSTREAM(InputRoot.MRM);

Does anybody know a way around this ?

Coz

Posted: Thu Jun 27, 2002 3:58 am Post subject:

Apprentice

Joined: 20 Feb 2002
Posts: 44
Location: Basel CH

This is the correct functionality of BITSTREAM as it only goes as far as the InputRoot.MRM.

You could try:

DECLARE headerLen Integer;
SET headerLen=LENGTH(InputRoot.MRM.HEADER);
SET OutputRoot."BLOB"."BLOB" = SUBSTRING(BITSTREAM(InputRoot.MRM) from headerLen);

ernest-ter.kuile

Posted: Thu Jun 27, 2002 4:04 am Post subject:

Apprentice

Joined: 13 May 2002
Posts: 49
Location: KLM Holland

ah, simple.

I didn't know that SUBSTRING worked on BLOBs as wel.

Up to a sec ago, I was working on a more complex form which involved a lot of typecasting.

Thanks.

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