Hi, Martijn, Martijn van Oosterhout wrote: > On Wed, Oct 18, 2006 at 11:36:44AM -0700, Jeff Davis wrote: >>> What's being suggested simply violates common sense. Basically: >>> >>> if (a = b) then (a||c = b||c) >>> >> If a is 'x' and b is 'x' and c is NULL, the above statement doesn't hold >> in PostgreSQL. > > Heh, well, c is supposed to be not NULL. Missed that. I was using the > equals to include (NULL = NULL) but in SQL it's not like that.
Maybe you should replace "=" with "IS NOT DISTINCT FROM" :-) HTH, Markus -- Markus Schaber | Logical Tracking&Tracing International AG Dipl. Inf. | Software Development GIS Fight against software patents in Europe! www.ffii.org www.nosoftwarepatents.org
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