Hi Mark,
> On 06. Oct, 2020, at 10:23, Mark <jxustnc@gmail.com> wrote:
>
> Actually, a single quotation will work.
> \ir 'C:\\Program Files\\PostgreSQL\\12\\demo-big-en-20170815.sql'
> But I don't know why a single quotation will work.
> It would be very helpful if you guys can explain to me.
because Microsoft had the glorious idea of putting a blank character into "Program Files". Quoting this will make the
wholeC:\...sql line one single word which is then passed to \i.
Cheers,
Paul