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OpenEdge Data Management: DataServer for ODBC
Programming Considerations : Database design issues : Processing considerations for 32-bit and 64-bit data types : Determining your application needs
 
Determining your application needs
Determine your application needs and goals before changing INTEGER data types to INT64 data types in applications. Not all INTEGER data types will necessarily require the additional bit size, nor will wholesale changes in data types necessarily work efficiently with other interfaces to ABL. For more information about determining when to use INT64 versus INTEGER, refer to the ABL Data Types Addenda Web paper.