1. If you were working on PySpark changes, I am terribly sorry that I caused some conflicts. Please take a look for the new styles and get used it.
2. Probably, I rushed a bit. I was scared if it's going to get conflicts again and again but please take a look and see if there's outstanding structural issues. I am willing to fix or revert at worst case.
3. Now, PySpark's SQL test were newly split but other tests will be split too in the same manner.