...
Now start coding! As you are writing your patch, please keep the following things in mind:
First, please follow the C++ Impala style guide. We are sticklers for adherence to the guide (with a couple of exceptions), and we won’t accept any patch that needs work in this regard. For Java and Python we do not have formal guides yet (writing one would be an excellent contribution!); please try to follow the standards set by existing code. We will help you with this when your patch is reviewed.
...