Tom,

> Mainly that "expressional" is a made-up word.

So?   We're in the tech biz, Tom.   New-coined words are expected.  And that 
way nobody will expect it to mean something else, since we made it up. 
-- H. Dumpty, Q.E.D.

> I have been considering using "calculated index" or "computed index"
> but dunno if that really conveys anything.

Well, "Expression Indexes" is the most accurate.  Or "Expression-Based 
Indexes."

-- 
-Josh Berkus
 Aglio Database Solutions
 San Francisco


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