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# Release Notes for Superset 1.5 | ||
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Superset 1.5 focuses on polishing the dashboard native filters experience, while | ||
improving performance and stability. Superset 1.5 is likely the last minor release of | ||
version 1 of Superset, and will be succeeded by Superset 2.0. The 1.5 branch | ||
introduces the notion of a Long Term Support (LTS) version of Superset, and will | ||
receive security and other critical fixes even after Superset 2.x is released. | ||
Therefore, users will have the choice of staying on the 1.5 branch or upgrading to 2.x | ||
when available. | ||
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||
- [**User Experience**](#user-facing-features) | ||
- [**Feature flags**](#feature-flags) | ||
- [**Database Experience**](#database-experience) | ||
- [**Breaking Changes and Full Changelog**](#breaking-changes-and-full-changelog) | ||
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## User Facing Features | ||
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- Complex dashboards with lots of native filters and charts will render considerably | ||
faster. See the videos that shows the rendering time of a complex dashboard go from | ||
11 to 3 seconds: [#19064](https://github.com/apache/superset/pull/19064). In | ||
addition, applying filters and switching tabs is also much smoother. | ||
- The Native Filter Bar has been redesigned, along with moving the "Apply" and | ||
"Clear all" buttons to the bottom: | ||
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![Filter bar](media/filter_bar.png) | ||
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- Native filters can now be made dependent on multiple filters. This makes it possible | ||
to restrict the available values in a filter based on the selection of other filters. | ||
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![Dependent filters](media/dependent_filters.png) | ||
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- In addition to being able to write Custom SQL for adhoc metrics and filters, the | ||
column control now also features a Custom SQL tab. This makes it possible to write | ||
custom expressions directly in charts without adding them to the dataset as saved | ||
expressions. | ||
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![Adhoc columns](media/adhoc_columns.png) | ||
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- A new `SupersetMetastoreCache` has been added which makes it possible to cache data | ||
in the Superset Metastore without the need for running a dedicated cache like Redis | ||
or Memcached. The new cache will be used by default for required caches, but can also | ||
be used for caching chart or other data. See the | ||
[documentation](https://superset.apache.org/docs/installation/cache#caching) for | ||
details on using the new cache. | ||
- Previously it was possible for Dashboards with lots of filters to cause an error. | ||
A similar issue existed on Explore. Now Superset stores Dashboard and Explore state | ||
in the cache (as opposed to the URL), eliminating the infamous | ||
[Long URL Problem](https://github.com/apache/superset/issues/17086). | ||
- Previously permanent links to Dashboard and Explore pages were in fact shortened URLS | ||
that relied on state being stored in the URL (see Long URL Problem above). In | ||
addition, the links used numerical ids and didn't check user permissions making it | ||
easy to iterate through links that were stored in the metastore. Now permanent links | ||
state is stored as JSON objects in the metastore, making it possible to store | ||
arbitrarily large Dashboard and Explore state in permalinks. In addition, the ids | ||
are encoded using [`hashids`](https://hashids.org/) and check permissions, making | ||
permalink state more secure. | ||
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![Dashboard permalink](media/permalink.png) | ||
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## Feature flags | ||
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- A new feature flag `GENERIC_CHART_AXES` has been added that makes it possible to | ||
use a non-temporal x-axis on the ECharts Timeseries chart | ||
([#17917](https://github.com/apache/superset/pull/17917)). When enabled, a new | ||
control "X Axis" is added to the control panel of ECharts line, area, bar, step and | ||
scatter charts, which makes it possible to use categorical or numerical x-axes on | ||
those charts. | ||
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![Categorical line chart](media/categorical_line.png) | ||
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## Database Experience | ||
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- DuckDB: Add support for database: | ||
[#19317](https://github.com/apache/superset/pull/19317) | ||
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- Kusto: Add support for Azure Data Explorer (Kusto): | ||
[#17898](https://github.com/apache/superset/pull/17898) | ||
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- Trino: Add server cert support and new auth methods: | ||
[#17593](https://github.com/apache/superset/pull/17593) and | ||
[#16346](https://github.com/apache/superset/pull/16346) | ||
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- Microsoft SQL Server (MSSQL): support using CTEs in virtual tables: | ||
[#18567](https://github.com/apache/superset/pull/18567) | ||
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- Teradata and MSSQL: add support for TOP limit syntax: | ||
[#18746](https://github.com/apache/superset/pull/18746) and | ||
[#18240](https://github.com/apache/superset/pull/18240) | ||
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- Apache Drill: User impersonation using `drill+sadrill`: | ||
[#19252](https://github.com/apache/superset/pull/19252) | ||
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## Developer Experience | ||
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- `superset-ui` has now been integrated into the Superset codebase as per | ||
[SIP-58](https://github.com/apache/superset/issues/13013) dubbed "Monorepo". This | ||
makes development of plugins that ship with Superset considerably simpler. In | ||
addition, it makes it possible to align `superset-ui` releases with official Superset | ||
releases. | ||
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## Breaking Changes and Full Changelog | ||
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**Breaking Changes** | ||
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- Bump `mysqlclient` from v1 to v2: | ||
[#17556](https://github.com/apache/superset/pull/17556) | ||
- Single and double quotes will no longer be removed from filter values: | ||
[#17881](https://github.com/apache/superset/pull/17881) | ||
- Previously `QUERY_COST_FORMATTERS_BY_ENGINE`, `SQL_VALIDATORS_BY_ENGINE` and | ||
`SCHEDULED_QUERIES` were expected to be defined in the feature flag dictionary in | ||
the `config.py` file. These should now be defined as a top-level config, with the | ||
feature flag dictionary being reserved for boolean only values: | ||
[#15254](https://github.com/apache/superset/pull/15254) | ||
- All Superset CLI commands (init, load_examples and etc) require setting the | ||
`FLASK_APP` environment variable (which is set by default when `.flaskenv` is loaded): | ||
[#17539](https://github.com/apache/superset/pull/17539) | ||
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**Changelog** | ||
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||
To see the complete changelog in this release, head to | ||
[CHANGELOG.MD](https://github.com/apache/superset/blob/1.5/CHANGELOG.md). | ||
As mentioned earlier, this release has a MASSIVE amount of bug fixes. The full | ||
changelog lists all of them! |
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