What PostgreSQL version are you using? Please try this in two psql
sessions and see if you see the same thing.
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paviles@its.co.cr wrote:
> Hi, I'm encountered a problem with a select for update sentence with
> postgresql.
>
> If I use...:
> begin transaction;
> select * from employees
> where status = 'A'
> limit 1
> for update;
> ...
>
> The problem, in the previous sentence, is block every record on employees,
> although we want one record, we want limit 1. The bug it seems the limit
> 1, because if I dispose the limit 1 line, only the return records are
> blocked.
>
> If I use:
> begin transaction;
> select * from employees
> where (status = 1) and (id_employee = 123)
> order by id_employee
> for update;
> ...
> it block every record on employees, although we want one record, we want
> id_employee = 123. The bug it seems the order by line, because if I
> dispose the order by line, only the return records are blocked.
>
> Do you have an alternative way? Is this a bug? Any suggestion?
>
> I'm using Delphi 6 with dbexpress, and the transaction was make with an
> TSQLClientDataSet component after an TSQLConnection
>
>
> Pablo Avil?s Cisneros
> Technology, ITS
> Software Development Area
> Technology, ITS
> San Jos?, Costa Rica
> email: paviles@its.co.cr
>
>
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