While looking at Fujita Etsuro's patch to allow copy to/from a shell
command, I noticed that the grammar currently allows these:
COPY foo FROM STDOUT
COPY foo TO STDIN
In other words, STDIN and STDOUT can be used completely interchangeably.
However, the ecpg grammar is more strict about that:
ERROR: COPY TO STDIN is not possible
Any particular reason for ecpg to check that, while the backend doesn't
care? I think we should just remove those checks from the ecpg grammar.
- Heikki
