Rational Developer for System z
Enterprise COBOL for z/OS, Version 4.1, 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 references  
SSRANGE


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