Re: Why is AccessShareLock held until end of transaction?

On 11 March 2014 03:41, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Joe Conway <mail@joeconway.com> writes:
>> I am probably missing something obvious, but why does the
>> AccessShareLock remain held on a table after a SELECT statement is
>> complete when in a transaction block?
>
> *Any* lock acquired by user command is held till end of transaction;
> AccessShareLock isn't special.
>
> In general, releasing early would increase the risk of undesirable
> behaviors such as tables changing definition mid-transaction.

I thought "good question" at first, but the workaround is simple...
just don't use multi-step transactions, submit each request as a
separate transaction.

-- Simon Riggs                   http://www.2ndQuadrant.com/PostgreSQL Development, 24x7 Support, Training & Services