* Bump pandas 1.4 and pyarrow 6
* Use engine="pyarrow" for pd.read_csv()
* Refactoring
* Refactoring
* Refactoring
* Use bytes in pd.read_json()
* Fix test_contribution
* Fix pandas issue when 'arrays' are empty but 'names' contain values
* fix: ValueError: For argument "ascending" expected type bool, received type NoneType.
* Remove engine="pyarrow" and convert bytes to string
* make copy of selected df to fix regression
* Simplify pd.read_json() and pd.read_csv() for example data
Co-authored-by: Ville Brofeldt <ville.brofeldt@apple.com>
* rebase master and resolve conflicts
* pylint to makefile
* fix crash when pivot operator
* fix comments
* add precision argument
* query test
* wip
* fix ut
* rename
* set time_offsets to cache key
wip
* refactor get_df_payload
wip
* extra query cache
* cache ut
* normalize df
* fix timeoffset
* fix ut
* make cache key logging sense
* resolve conflicts
* backend follow up iteration 1
wip
* rolling window type
* rebase master
* py lint and minor follow ups
* pylintrc