[GRASS-dev] bugs in r.shaded.relief and r.fillnulls
Glynn Clements
glynn at gclements.plus.com
Thu Jul 26 17:34:36 EDT 2007
Brad Douglas wrote:
> > Also I noticed that r.fillnulls doesn't allow input/output filenames
> > to have "-" or "."
>
> This is because there is an intermediate vector step. We don't allow
> "-" or "." in vector file names because it breaks SQL compatibility ("-"
> could be allowed, though. I don't know what the reasoning behind that
> one is).
The "-" character isn't valid in SQL table/column names. Trying to use
a column named "foo-bar" would be interpreted as the result of
subtracting column "bar" from column "foo".
The only characters allowed in table/column names are letters, digits,
and underscore.
--
Glynn Clements <glynn at gclements.plus.com>
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