RE: strange behaviour of sequence

From: Stephane Faroult <sfaroult_at_oriolecorp.com>
Date: Wed, 29 Jan 2003 03:33:47 -0800
Message-ID: <F001.0053D081.20030129033347@fatcity.com>

('binary' encoding is not supported, stored as-is)
>Guys,
>
>one of my developers is using sequence to
>auto-increment the value
>of a column while inserting.
>
>he has created a sequence like this.
>
>SQL > create sequence testseq start with 1;
>
>and then uses a INSERT statement as below in a JSP.
>
>
>insert into testtab values
>('BREAD'||testseq.nextval);
>
>after some inserts .....when he does SELECT from
>TESTTAB...he
>finds
>the values as :
>
>BREAD1
>BREAD2
>BREAD3
>BREAD4
>BREAD21
>BREAD22
>
>it should increment by 1.but it is not so ?
>
>any hint/clue ????
>
>Regards,
>Jp.
>

A gap lower than 20 points to unused cached values (default cache = 20). Can be a database rebounce, or (possibly, I have not checked) some ALTER SYSTEM FLUSH SHARED_POOL. Of course, rollbacks also introduce gaps, whatever the number of cached values.

Regards,

Stephane Faroult
Oriole

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Author: Stephane Faroul
  INET: sfaroult_at_oriolecorp.com

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Received on Wed Jan 29 2003 - 05:33:47 CST