On Tue, Nov 1, 2011 at 1:52 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Simon Riggs <simon@2ndQuadrant.com> writes:
>> Why not leave it exactly as it is, and add a previous_query column?
>
>> That gives you exactly what you need without breaking anything.
>
> That would cost twice as much shared memory for query strings, and twice
> as much time to update the strings, for what seems pretty marginal
> value. I'm for just redefining the query field as "current or last
> query". I could go either way on whether to rename it.
That's a good reason.
> If anyone's really hot about backward compatibility, it would not be
> very hard to create a view that replicates the old behavior working
> from a "state" column and a current-or-last-query column.
I'm in favour of change, when that has a purpose, just like you.
--
Simon Riggs http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services
