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Expert PL/SQL Practices for Oracle Developers and DBAs by Riyaj Shamsudeen, Robyn Sands, Michael Rosenblum, Stephan Petit, Arup Nanda, Connor McDonald, Torben Holm, Sue Harper, Dominic Delmolino, Lewis Cunningham, Ron Crisco, Melanie Caffrey, Martin Büchi, Adrian Billington, John Beresniewicz

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C H A P T E R  3

PL/SQL and Parallel Processing

by Dominic Delmolino

Imagine if you went to the grocery store and only one person was allowed in at a time. Everyone else had to wait outside in a long line until each individual completed their trip before entering the store. Even worse, image if you were only allowed to buy one item while inside the store. If you needed multiple items, you were required to get back in line outside of the store for each one.

This example of one-at-a-time activity is called serial processing, and while it's possible to speed this activity up, perhaps by giving each shopper roller skates so they move through the store faster, or by allowing them to take a cart inside and pick out multiple items, it's still constrained ...

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