Getting consecutive sequence values

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От nolan@celery.tssi.com
Тема Getting consecutive sequence values
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Msg-id 20030404190005.27813.qmail@celery.tssi.com
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Ответы Re: Getting consecutive sequence values  (Dave Smith <dave.smith@candata.com>)
Re: Getting consecutive sequence values  (Dennis Gearon <gearond@cvc.net>)
Список pgsql-general
(The first copy of this got stalled because of internal addressing issues,
hopefully it will not be duplicated.)

I'm using a sequence to generate unique 8 digit record keys which will be
given out as membership ID's.

Because we want to be able to pre-assign blocks of membership numbers
for use in off-line membership registration situations, I need to be able
to ensure that a block of sequences are in consecutive order even though
they may be requested concurrently with other activity on the sequence.

If I use SQL such as "select nextval('id'),nextval('id'),...,nextval('id')"
to allocate 50 or 100 sequence numbers, will the backend ensure that
those sequence numbers are a consecutive block?
--
Mike Nolan
nolan@tssi.com


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