Re: [HACKERS] psql \copy warning

Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> writes:
> The attached patch fixes the warning you received by adding E'' strings
> to the \copy arguments, and adds it for the other backslash commands
> like \d.

Further comment on this: I don't think we want all these places
individually making this sort of decision. What they should all be
doing is using appendStringLiteralConn to generate the properly-quoted
literal. (I fixed this already in describe.c, but not in those other
places.)

Once we've got that done, we could argue about whether appendStringLiteral
ought to prepend an E to silence escape_string_warning. I'd still vote
no, but at least it would be a single place to change and not N of 'em.
What's more, each place that is generating a variable literal without
using appendStringLiteral or PQescapeString is at least potentially
vulnerable to encoding issues, and so we should probably convert them
anyway.

regards, tom lane