Message-ID: <45362CCA.8060000@dunslane.net>
Date: Wed, 18 Oct 2006 09:31:54 -0400
From: Andrew Dunstan <andrew@dunslane.net>
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To: Indira Muthuswamy <indumuthu@gmail.com>
CC: pgsql-hackers@postgresql.org
Subject: Re: Bug?
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Indira Muthuswamy wrote:
> Hai,
>  
>  I have encountered a problem with PostgreSQL.I have created a table 
> 'tab1' with a column 'a' with serial type.I entered 20 records into 
> the  table.So the query
>   select max(a) from tab1;
> returned 20.When I tried the same query after the command
>  truncate table tab1;
> I found that the output of the first query as
>  
>  max
> -----
>
> (1 row)
>
> When I tried to insert a new row into the table tab1 I found that the 
> value at column a incremented to the value 21.
> But I heard from my friends that the value of the serial column gets 
> decremented whenever we issue the 'truncate table' command (in MS SQL 
> SERVER).Is the concept same with PostgreSQL or not?Can anyone clarify 
> me on this?
>  

Sure. You heard wrong about postgres.

Please do not ask questions like this on the -hackers list - this should 
have gone to pgsql-general. The hackers list is for postgresql 
development discussions only.

cheers

andrew