Re: Pipelining executions to postgresql server

Mikko Tiihonen <Mikko(dot)Tiihonen(at)nitorcreations(dot)com> writes:
> I do not quite grasp why not sending Sync is so important. My proof of concept setup was for queries with autocommit enabled.

The point is that that will be very, very much harder to use than doing
it the other way. It's fairly easy to reason about the results of
single-transaction pipelined queries: they're all or nothing. If you
fire off queries that are going to autocommit independently, then you
have to worry about all combinations of success/failure, and you won't
have the opportunity to adjust on the fly. It'll be very much like
sending a fixed (predetermined) SQL script to the server using a scripting
language that lacks any conditionals. People certainly do use fixed
scripts sometimes, but they usually find out they want them wrapped into
single transactions, because otherwise they're left with a horrible mess
if the script goes off the rails at all.

regards, tom lane