Re: Counting number of rows, sequences with no sequences

From: Jan Pruner <JPruner_at_email.cz>
Date: Wed, 18 Feb 2004 00:07:26 +0100
Message-ID: <40329EAE.102@email.cz>

Wrong.
1. RTFM - Function cannot write to the database, if the function is being called from a SELECT statement.

2. your script is good for single user environment, but in multiuser environment (like Oracle) will produce a BIG problem!!!

Juan Cachito Reyes Pacheco wrote:

> What you can do is to create a one record table, the if the transaction
> rollbacks it will rollback
>
> create table sequence( value number);
>
> function getnewsequence
> select value+1 into variable from sequence;
> update table sequence value=variable ;
> return variable ;
> end;
>
> ----- Original Message -----
> From: "Mladen Gogala" <mladen_at_wangtrading.com>
> To: <oracle-l_at_freelists.org>
> Sent: Tuesday, February 17, 2004 6:13 PM
> Subject: Re: Counting number of rows, sequences
>
>
> What happens if the transaction is rolled back?
>
> On 02/17/2004 05:03:14 PM, Juan Cachito Reyes Pacheco wrote:
>

>>The other choice if you have to frecuently do counts to that table is
>>a
>>sequence
>>
>>You create an addiatoinal field with a sequence
>>
>>CREATE SEQUENCE, etc.
>>
>>row  sequence
>>
>>1       1
>>2        2
>>....
>>1234  1234
>>
>>Then you select from the sequence the currval, and this is immediate.
>>

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Received on Tue Feb 17 2004 - 17:07:26 CST