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MySQL Stored Procedure Programming
book

MySQL Stored Procedure Programming

by Guy Harrison, Steven Feuerstein
March 2006
Intermediate to advanced content levelIntermediate to advanced
640 pages
17h 8m
English
O'Reilly Media, Inc.
Content preview from MySQL Stored Procedure Programming

Trigger Overhead

It is important to remember that, by necessity, triggers add overhead to the DML statements to which they apply. The actual amount of overhead will depend upon the nature of the trigger, but—as all MySQL triggers execute FOR EACH ROW—the overhead can rapidly accumulate for statements that process large numbers of rows. You should therefore avoid placing any expensive SQL statements or procedural code in triggers.

We will look at an example of trigger overhead in Chapter 22.

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Publisher Resources

ISBN: 0596100892Supplemental ContentErrata Page