How can i override create_export_query function on the Calls module

I like to add columns accounts.name and assigned_username to the开发者_StackOverflow社区 exporting CSV on the Calls module. I can do that by editing the function create_export_query on the modules/Calls/Call.php

But I want this to be done on upgrade safe manner. I am using SugarCRM Pro 6.2 version

Thanks in advance

To my knowledge, it is currently not possible to "override"/extend any sugarBean classes. Currently SugarCRM only facilitates upgrade-safe customizing to vardefs, languages, shortcuts, layouts, web services, and controllers+controller methods.

• Metadata customizing: documentation
• Web Services: documentation
• Controller customizing: documentation

I'd properly make a custom module, which mimicks or extends the call module's export function in order to make it upgrade safe. (documentation)