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Re: Composite Keys

From: RPK <rohitprakash123(at)indiatimes(dot)com>
To: pgsql-general(at)postgresql(dot)org
Subject: Re: Composite Keys
Date: 2007-02-26 18:56:20
Message-ID: 9166441.post@talk.nabble.com (view raw or flat)
Thread:
Lists: pgsql-general
Alvaro,

I am using VB.NET. How to enable locking from within VB.NET for PostgreSQL?
Which command need to be executed?



Alvaro Herrera-7 wrote:
> 
>>Lock the table beforehand.  Only one user can be getting the
>>max(ReceiptNo) that way.
> 
>>Alternatively, you could use userlocks, so that you can lock, generate
>>the number, unlock.  And you can use it to lock that particular BookNo,
>>not the whole table.  (In Postgres 8.2 the facility is called "advisory
>>locks" and comes with the core code; in older releases it's in contrib
>>and it's called "userlock").
> 
> -- 
> Alvaro Herrera                               
> http://www.CommandPrompt.com/
> The PostgreSQL Company - Command Prompt, Inc.
> 
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