'Algebraic laws' diaporamas de présentation

An Algebra for Program Designs

1.04k views • 93 slides

CS322

Week 15 - Wednesday. CS322. Last time. What did we talk about last time? Review first third of course. Questions?. Logical warmup. Consider the following shape to the right: Now, consider the next shape, made up of pieces of exactly the same size: We have created space out of nowhere!

588 views • 44 slides

Laws of Pattern Composition

Laws of Pattern Composition. Hong Zhu and Ian Bayley Department of Computing and Electronics Oxford Brookes University Oxford OX33 1HX, Uk Email: hzhu@brookes.ac.uk. Introduction. Software Design Patterns (DP) codified reusable solutions to recurring design problems,

456 views • 35 slides

Lecture 25: Query Optimization

Lecture 25: Query Optimization. Wednesday, November 22, 2000. Outline. Finish index-based algorithms From SQL to logical plans (7.3) Algebraic laws (7.2). Index Based Selection. Selection on equality: s a=v (R) Clustered index on a: cost B(R)/V(R,a)

377 views • 24 slides

Lecture 26: Query Optimization

Lecture 26: Query Optimization. Wednesday, December 1st, 2004. Outline. Query optimization: algebraic laws 16.2. The three components of an optimizer. We need three things in an optimizer: Algebraic laws (today) An optimization algorithm (Friday) A cost estimator (Monday++).

259 views • 16 slides