On Aug 8, 2008, at 3:23 PM, Tom Lane wrote:
* has no set operations (UNION etc), grouping, set-returning functions in the SELECT list, LIMIT, or a few other funny cases
Couldn't union/union all be treated as EXISTS(a) OR EXISTS(b) ... Or am I missing some detail with NULLS?Personally, I'd rather write it as separate EXISTS clauses rather than using UNION, but perhaps others have a different preference...
-- Decibel!, aka Jim C. Nasby, Database Architect [EMAIL PROTECTED] Give your computer some brain candy! www.distributed.net Team #1828
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