AgentM wrote:
> Couldn't the session be explicitly transferred into a special
> analysis mode? Explain analyze could run on every query implicitly
> and point out time and row count discrepancies as HINTs. Multi-column
> joins, for example, could be pointed out and display whether or not
> there are related indexes.

Meet EXPLAIN ANALYZE.

-- 
Peter Eisentraut
http://developer.postgresql.org/~petere/

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TIP 6: explain analyze is your friend

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