INDEX ONLY scan with expression index

Hello,

Would anyone be able to shed some light on why expression based indexes
can't be used for an index only scan?

I've found a few comments saying this is the case, and I've proven it is
the case in reality - but I can't seem to find the why.

Cheers,

James Sewell,
Solutions Architect
______________________________________

Level 2, 50 Queen St, Melbourne VIC 3000

*P *(+61) 3 8370 8000 *W* www.lisasoft.com *F *(+61) 3 8370 8099

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