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# Release Notes for Superset 2.0

Superset 2.0 is a big step forward. This release cleans up many legacy code paths and feature flags, and deprecates lots of legacy behaviors in Superset.

- [**Developer Experience**](#developer-experience)
- [**Features**](#features)
- [**Config and Feature flags**](#config-and-feature-flags)
- [**Breaking Changes**](#breaking-changes)

## Developer Experience

- Addition of a statsd gauge metric for Slack and email notifications for increased visibility into errors around alerts / reports ([#20158](https://github.com/apache/superset/pull/20158))

- Helm chart now supports resource limits and requests for each component ([#20052](https://github.com/apache/superset/pull/20052))

- New GitHub workflow to test Storybook Netlify instance nightly ([#19852](https://github.com/apache/superset/pull/19852))

- Minimum requirement for Superset is now Python 3.8 ([#19017](https://github.com/apache/superset/pull/19017))

## Features

**Charting and Dashboard Experience**

Support for horizontal bar chart added ([#19918](https://github.com/apache/superset/pull/19918))

![horizontal](https://user-images.githubusercontent.com/11830681/166248149-4946388a-5051-4d13-a516-50a81e9b5be3.png)

Time Series Charts now support stacking of both negative and positive values ([#20408](https://github.com/apache/superset/pull/20408))

![negative](https://user-images.githubusercontent.com/15073128/174057996-52255bfe-60c3-4727-be99-e328c124e439.png)

- Pie charts now defaults to a row limit of 100 to prevent crashes when a high-cardinality column is chosen as the dimension ([#20392](https://github.com/apache/superset/pull/20392))

- World map chart now supports coloring either by metric or by the country column ([#19881](https://github.com/apache/superset/pull/19881))

- Table visualization now supports drag and drop for columns ([#19381](https://github.com/apache/superset/pull/19381))

- Mixed chart now supports Advanced Analytics ([#19851](https://github.com/apache/superset/pull/19851))

- Add support for generic x-axis (non-time-series) in the Mixed Chart ([#20097](https://github.com/apache/superset/pull/20097))

![Image](https://user-images.githubusercontent.com/33317356/168807749-b021c04c-8902-4b4f-a7a4-f21544fb678e.png)

- Charts can now be created in Edit Dashboard mode ([#20126](https://github.com/apache/superset/pull/20126))

![Image](https://user-images.githubusercontent.com/15073128/169251205-2c0f36bb-17e0-4549-aa84-66a58a377603.png)

- Add aggregate total for Pie charts ([#19622](https://github.com/apache/superset/pull/19622))

- Legend is now enabled by default for relevant charts ([#19927](https://github.com/apache/superset/pull/19927))

**View Results Experience**

- Explore and Dashboard views now support displaying of multiple results ([#20277](https://github.com/apache/superset/pull/20277))

- Results pane in Dashboard view now more closely mirrors rich functionality from Results pane in Explore ([#20144](https://github.com/apache/superset/pull/20144))


**Quality of Life**

- Edit Dataset modal now doesn't close when you click away ([#20278](https://github.com/apache/superset/pull/20278))

- When editing the label in the Metrics popover, pressing Enter now saves what you typed ([#19898](https://github.com/apache/superset/pull/19898))

- When adding new chart from the dashboard view, the dashboard name will now pre-fill ([#20129](https://github.com/apache/superset/pull/20129))

- Annotations now have an improved empty state ([#20160](https://github.com/apache/superset/pull/20160))

- Confirmational modal is now shown if user exits Explore without saving changes ([#19993](https://github.com/apache/superset/pull/19993))

- Explore popovers now close when the Escape key is pressed ([#19902](https://github.com/apache/superset/pull/19902))

- Run and Save buttons are redesigned for improved usability ([#19558](https://github.com/apache/superset/pull/19558))

**Databases**

- Native database driver for Databricks ([#20320](https://github.com/apache/superset/pull/20320))

- Time grains for SQLite are now simplified ([#19745](https://github.com/apache/superset/pull/19745))

- Multiple upgrades to the Trino database engine ([#20152](https://github.com/apache/superset/pull/20152))

- Switch from sqlalchemy-trino to trino-python-client ([#19957](https://github.com/apache/superset/pull/19957))

- Apache Pinot now supports more time grains in Superset ([#19724](https://github.com/apache/superset/pull/19724))

**Jinja**

- New Jinja macro enables querying / referencing both physical and virtual datasets in SQL Lab ([#15241](https://github.com/apache/superset/pull/15241))

- New Jinja macro added to improve experience of including multiple items ([#19574](https://github.com/apache/superset/pull/19574))

**Other**

- Datasets can now be filtered by their certification status ([#20136](https://github.com/apache/superset/pull/20136))


## Config and Feature Flags

- Initial implementation of advanced types ([#18794](https://github.com/apache/superset/pull/18794))
	- Flag: `ENABLE_ADVANCED_DATA_TYPES`

- Caching can now be enabled in database setups when user impersonation is enabled ([#20114](https://github.com/apache/superset/pull/20114))
	- Flag: `CACHE_IMPERSONATION`

- Control behavior for how color palettes are chosen ([#19987](https://github.com/apache/superset/pull/19987))
	- Flag: `USE_ANALAGOUS_COLORS`

- Enabling non-time-series x-axis in some charts ([#20097](https://github.com/apache/superset/pull/20097))
	- Flag: `GENERIC_CHART_AXES`

- As part of the 2.0 cleanup efforts, the following feature flags were removed (which means the behavior is now permanently enabled):
	- `ROW_LEVEL_SECURITY`
	- `ENABLE_REACT_CRUD_VIEWS`
	- `PUBLIC_ROLE_LIKE_GAMMA`

- The following feature flags are now True by default, but can be turned back to False:
	- `ENABLE_EXPLORE_DRAG_AND_DROP`
	- `ENABLE_DND_WITH_CLICK_UX`
	- `DISABLE_LEGACY_DATASOURCE_EDITOR`
	- `SQLLAB_BACKEND_PERSISTENCE`
	- `VERSIONED_EXPORT`

- The following config flags were removed:
	- `APP_ICON_WIDTH`

- A number of legacy interim flags were removed around SIP-15 ([#18936](https://github.com/apache/superset/pull/18936))

- The `ENABLE_JAVASCRIPT_CONTROLS` flag was moved from an app config to a feature flag

## Breaking Changes

To learn more about the breaking changes in 2.0, please read [UPDATING.MD](https://github.com/apache/superset/blob/master/UPDATING.md)