Re: about client-side cursors

On Wed, 3 Feb 2021 at 17:16, Denis Laxalde <denis(dot)laxalde(at)dalibo(dot)com> wrote:

> Why do we need two 'await' (i.e. two IO operations) on conn.execute()
> and cur.fetchall() if 'cur' is a client-side cursor? (Back to my first
> point about where IO happen, this appears to depend on whether the
> connection has 'autocommit' or not...)

Around this point, one arguably not useful `await` is on
`connection.cursor()`. I wanted to put some flesh around server-side
cursors before making my mind around it. Now I have, as I am working
in a server-side cursor branch, and I don't think there are reasonable
cases where `connection.cursor()` might do I/O.

So, in the server-side branch, I've made the function non-async on
AsyncConnection too. This makes also context manager better to use, as
now you can do:

async with aconn.cursor() as cur:
# use it

whereas previously it would have taken an `async with await aconn.cursor()`.

I assume the change is welcome, but please let me know if this is not the case.

Cheers

-- Daniele