Tom Lane wrote:
Joe Conway <[EMAIL PROTECTED]> writes:
My first thought on fixing this issue was to simply replace all
instances of '\r' in pg_proc.prosrc with '\n' prior to sending it to the
R parser. As far as I know, any instances of '\r' embedded in a
syntactically valid R statement must be escaped (i.e. literally the
characters "\" and "r"), so that should not be a problem. But I am
concerned about how this potentially plays against multibyte characters.
Is it safe to do this, or do I need to use a mb-aware replace algorithm?
It's safe, because you'll be dealing with prosrc inside the backend,
therefore using a backend-legal encoding, and those don't have any ASCII
aliasing problems (all bytes of an MB character must have high bit set).
Great -- I wasn't sure about that.
However I dislike doing it exactly that way because line numbers in the
R script will all get doubled. Unless R never reports errors in terms
of line numbers, you'd be better off to either delete the \r characters
or replace them with spaces.
Good point. But I need to be able to deal with Apple EOLs too -- IIRC
those can be *only* '\r'. So I guess I need to do a look-ahead whenever
I run into '\r', see if it is followed by '\n', and then munge the
string accordingly.
Joe
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