* support datax task by python * add task datax example Co-authored-by: Jiajie Zhong <zhongjiajie955@gmail.com>
We add a new task procedure, and add parent class database for both sql task and procedure task fix: #6929
* Change class Base `to_dict` to `get_define` for more clearer * Remove class TaskParams and sub class make code easy to understand and avoid task implement cycle dependence * Remove class ObjectJsonBase in Task to reduce complexity fix: #7271
* [python] Add task sql * Add java gateway function doc