scott.marlowe wrote:
> On Wed, 18 Feb 2004, Christopher Kings-Lynne wrote:
>
>>>>>1- How can I lock a single record so that other users can only read
>>>>>it. ??
>>>>
>>>>
>>>>You cannot do that in PostgreSQL.
>>>
>>>
>>>How about SELECT ... FOR UPDATE?
>>
>>No, because users cannot read the locked row in that case.
>
> I just tested it (within transactions) and it appeared that I could still
> view the rows selected for update.
Thank you. I was just about to test it myself.
The user's guide, section 9.3.2 states that this is the case: i.e. select
for update will prevent concurrent updating of the row, while allowing
queries utilizing that row to succeed.
--
Bill Moran
Potential Technologies
http://www.potentialtech.com