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From Mark Fraser <m...@mark100.net>
Subject Expression help
Date Thu, 07 Jan 2010 00:32:38 GMT
Suppose I have an Artists table and a Paintings table with the usual setup
of the Artist class having a PAINTINGS_ARRAY property.  Suppose further that
the painting has a "color" property that can be a string or null.

How would I build an Expression such that I get back the Artists that have
either no paintings or only paintings with a specific color value (or a null
color value)?

I am using Cayenne 2.0.4 in case that matters.

TIA

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