Re: Accessing a database via AJAX scripts

Hi Tom,

On 08/09/2010 03:33 AM, Tom Lane wrote:

> Your note is awfully short of concrete details, but I'm guessing the
> basic reason why this wasn't working for you was you were doing all the
> operations as a single transaction. The results of that transaction
> wouldn't be visible to another one until it commits; so in particular
> whatever changes it made in the status table wouldn't be visible.
> You'd need to break the processing into something like
> begin;
> insert into status values ('working');
> commit;
> begin;
> ... do the useful stuff here ...
> commit;
> begin;
> insert into status values ('done');
> commit;

Yes, it was a bit vague but I didn't want to go into too much detail as
I am still not sure I am even dealing with a postgresql issue.

Unfortunately your comments don't shed any light on the error I am getting;
"could not receive data from server: Bad file descriptor".

This suggests to me that I might have lost the connection in my forked
perl process to the back-end. Can you confirm or deny ? This might
give me some idea of where to keep looking.

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