'Note 2 intermediate results' presentation slideshows

Estimating the Cost of Operations

Estimating the Cost of Operations. Two candidates for the best logical query plan. Initial logical query plan. From l.q.p. to p.q.p. Having parsed a query and transformed it into a logical query plan, we must turn the logical plan into a physical plan.

332 views • 21 slides

Estimating the Cost of Operations

Estimating the Cost of Operations. Two candidates for the best logical query plan. Which one to choose?. Initial logical query plan. Why estimate the costs?. Estimating Costs. How can we estimate the number of tuples in an intermediate relation ?

216 views • 21 slides

Estimating the Cost of Operations

196 views • 19 slides