On Thu, Sep 07, 2006 at 12:58:17PM +0200, Stefan Schwarzer wrote: > Unfortunately the mapserver can't deal with NULL values. So, I can't > build a class saying > if values = NULL do something > but instead it only works with "fake" NULL values as -9999 > if values = -9999 do something
That's because nothing is equal to NULL. You say "values IS NULL". And COALESCE(a,b) is pretty mutch: IF a IS NULL THEN b ELSE A Have a nice day, -- Martijn van Oosterhout <kleptog@svana.org> http://svana.org/kleptog/ > From each according to his ability. To each according to his ability to > litigate.
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