Re: the use of $$string$$

On mån, 2011-11-07 at 08:44 +0000, Richard Huxton wrote:
> > myvarString = "long string that contains single quotes"
> > cusor.execute("insert into table (pkid, myfield) values (%s, $$%s
> $$)",(123,
> > myvarString))
> >
> > When I execute the above I'm seeing:
> > E'long string that contains single quotes' in the field. When I do
> a "select
> > * from table" I get E'long string that contains single quotes'.
>
> OK, so it seems psycopg is quoting your strings for you (as you'd
> expect). It's presumably turning your query into:
> ... values (E'123', $$E'<long string>'$$)
> So - the $$ quoting is unnecessary here - just use the % placeholders.
>
> Incidentally, should it be %s for the numeric argument?

Yes.