Why DataMapper return language and config and many others data?

[eluser]devbashar[/eluser]
Hello,

i am using DataMapper and i want to save the returns value in external file..

Code:

var_dump(what_datamapper_function_return);

the result will be not only the data!! (language, config, session, .........)

can i do something to return the database data only?

thanks..