The access plan obtained with bind variables is a
guess plan because the optimiser lacks information.
The plan obtained with real data is a definitive plan
because the optimiser knows everything he needs in
order to make a decision.
It's nice to used bind variables to save on parsing
but real values give the optimiser more clues to
build the access plan .
HTH
--- Gene Gurevich <[EMAIL PROTECTED]> a
�crit�: > Hi,
>
> I'm trying to tune a query which has several input
> parameters. I used the bind variables in their place
> to create an explain plan. Then I put some real
> data in their place and created another explain
> plan.
> The two plans were different. Which plan should I
> be using in my tuning? The one with the bind vars or
> the one with the real data?
>
> TIA
>
> Gene
>
> =====
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DBA Oracle, consultant entrep�t de donn�es
Oracle DBA, datawarehouse consultant
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