* Use PyArrow Table for query result serialization
* Cleanup dev comments
* Additional cleanup
* WIP: tests
* Remove explicit dtype logic from db_engine_specs
* Remove obsolete column property
* SupersetTable column types
* Port SupersetDataFrame methods to SupersetTable
* Add test for nullable boolean columns
* Support datetime values with timezone offsets
* Black formatting
* Pylint
* More linting/formatting
* Resolve issue with timezones not appearing in results
* Types
* Enable running of tests in tests/db_engine_specs
* Resolve application context errors
* Refactor and add tests for pyodbc.Row conversion
* Appease isort, regardless of isort:skip
* Re-enable RESULTS_BACKEND_USE_MSGPACK default based on benchmarks
* Dataframe typing and nits
* Renames to reduce ambiguity
* [fix] csv upload when table metadata present
* Remove table from hive spec
* Move upload before table metadata creation
* Refine upload logic, dd unit tests and fix translations
* Use ALLOWED_EXTENSIONS from config
* Address review comments
* Fix error message grammar
* Add return type to hive csv upload and replace first with one_or_none
* Typo fix in CONTRIBUTING.md
* Alter references to config.get('FOO') to use preferred config['FOO']
* Set missing configuration constants in superset/config.py
* Misc. CI fixes
* Add type annotation for FEATURE_FLATGS
* Enable lint checking for files in db_engine_spec that have few to no
lint issues
* Enable lint and fix issue in db_engine_spec/mysql.py
* Enable pylint and fix lint for db_engine_spec/pinot.py
* Enable lint and fix issues for db_engine_specs/hive.py
* Enable lint and fix for db_engine_spec/presto.py
* Re-enable lint on base.py, fix/disable specific failures, including one
bad method signature
* Make flake8 happy after a number of pylint fixes
* Update db_engine_spec_test test cases related to Presto to support
different method naming
* automated reformatting
* One more pylint disable for druid.py
* Find the magic invocation that makes all the lint tools happy
* Handle int64 columns with missing data in SQL Lab
* Fix docstring
* Add unit test
* Small fix
* Small fixes
* Fix cursor description update
* Better fix
* Fix unit test, black
* Fix nan comparison in unit test
* Fix regression in time grain addons
* Revert privatization of time_grain_functions
* Fix test
* Rename variable
* Fix test
* Fix typing error
* Refactor and add tests
* Add TODO
* Add typing to db_engine_specs
* Add more type annotations and docstrings
* Add docstrings and typing to sql_parse and db_engine_specs
* Refine select_star
* Fix execute and add more docstrings
* Revert kwargs change from execute
* Remove redundant or
* Align view and table getter schema types
* Fix return type of latest_partition
* Remove some typing from presto
* Improve docstring for __extract_from_token
* Create query_obj for every filter
* Deprecate is_prequery and prequeries from query_obj
* Fix tests
* Fix typos and remove redundant ; from sql
* Add typing to namedtuples and move all query str logic to one place
* Fix unit test
* Add extra_require for bigquery to setup.py
* Refactor df_to_db and add df upload capability for BigQuery
* Fix unit tests and clarify kwarg logic
* Fix flake8 errors
* Add minimum versions for bigquery dependencies
* wrap to_gbq in try-catch block and raise error if pandas-gbq is missing
* Fix linting error and make error more generic
