You should try disassembling with disassembler tool of your choice. At the end of the day, executables compiled with PRO C/C++ preprocessor are just plain C/C++ executables.
If what you're looking for is SQL sentences within your code, you might want to take a look at:
$ strings your_executable_file
It will give you a list of all constants strings present in your executable, and chances are that you are going to get SQL sentences with that.
Good luck.
