July 2011
Intermediate to advanced
516 pages
14h 50m
English
book
Expert PL/SQL Practices for Oracle Developers and DBAs
by John Beresniewicz, Adrian Billington, Martin Büchi, Melanie Caffrey, Ron Crisco, Lewis Cunningham, Dominic Delmolino, Sue Harper, Torben Holm, Connor McDonald, Arup Nanda, Stephan Petit, Michael Rosenblum, Robyn Sands, Riyaj Shamsudeen
Content preview from Expert PL/SQL Practices for Oracle Developers and DBAs
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C H A P T E R 7
Know Your Code
The name of this chapter is “Know Your Code.” You might think that if you wrote a piece of code, you know it well. You probably do. You know it at least as well as anyone else. Even if you've written the code, however, you will still make assumptions based from your memory. These assumptions will likely move further and further from reality as time goes on. You have a best guess—an educated assumption—but that is subjective and dependent on human frailty. And if you didn't write the code, all bets are off.
Why guess when you can know? I first heard that question in a performance context. I think it was Cary Milsap (author and performance guru) who said it (at least the first time I heard ...