Rational Developer for System z
COBOL for Windows, Version 7.5, Programming Guide


Handling tables efficiently

You can use several techniques to improve the efficiency of table-handling operations, and to influence the optimizer. The return for your efforts can be significant, particularly when table-handling operations are a major part of an application.

The following two guidelines affect your choice of how to refer to table elements:

Whether you use indexes or subscripts, the following coding guidelines can help you get better performance:

You can also improve the efficiency of tables by using these guidelines:

related concepts
Optimization of table references

related tasks
Referring to an item in a table
Choosing efficient data types

related references
SSRANGE


Terms of use | Feedback

Copyright IBM Corporation 1996, 2008.
This information center is powered by Eclipse technology. (http://www.eclipse.org)