On 10 May 2012 15:05, Radosław Smogura <rsmogura(at)softperience(dot)eu> wrote:
> May I ask what kind of planning may occur during insert?
Well, for example, if there's a unique constraint on the table then
the database will have to check that the newly inserted values don't
conflict with values that are already in the table. It needs to plan
an efficient strategy for that, which depends on the values being
inserted.
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Cut the trees and you'll see there is no forest.