- Use new master / rc release release strategy (#440)
- Migrate Circle CI 2.0 (#488, #502, #923)

In the long run we'll be able to install additional dependencies by
having an own Dockerfile to build images based on the Redash image
but that installs additional Python dependencies. But until we have
a fork with lots of changes ourselves we need to do it this way.

Redash-stmo contains the ability to hook up our own Dockerflow
library.

Refs #13
Refs #37

Refs #537, #553.

Co-authored-by: Marina Samuel <[email protected]>
Co-authored-by: Allen Short <[email protected]>

…fixes #774)

* Process extra column metadata for a few sql-based data sources.

* Add Table and Column metadata tables.

* Periodically update table and column schema tables in a celery task.

* Fetching schema returns data from table and column metadata tables.

* Add tests for backend changes.

* Front-end shows extra table metadata and uses new schema response.

* Delete datasource schema data when deleting a data source.

* Process and store data source schema when a data source is first created or after a migration.

* Tables should have a unique name per datasource.

* Addressing review comments.

* Update migration file for mixins.

* Appease PEP8

* Upgrade migration file for rebase.

* Cascade delete.

* Adding org_id

* Remove redundant column and table prefixes.

* Non-existing tables and columns should be filtered out on the server side not client side.

* Fetching table samples should be optional and should happen in a separate task per table.

* Allow users to force a schema refresh.

* Use updated_at to help prune old schema metadata periodically.

* Using settings.SCHEMAS_REFRESH_QUEUE

* fix for getredash#2426 test

* more stable test_interactive_new

* Closes #927, #928: Schema refresh improvements.

* Closes #934, #935: Remove type from schema browser and don't show empty example column in schema drawer (#936)

* Speed up schema fetch requests with fewer postgres queries.

* Add column metadata to Athena glue processing.

* Fix bug assuming 'metadata' exists for every table.

* Closes #939: Persisted, existing table metadata should be updated.

* Sample processing should be rate-limited.

* Add cli command for refreshing data samples.

* Schema refreshes should not overwrite column 'example' field.

* refresh_samples() should filter tables_to_sample on the datasource's id being sampled

* Correctly wrap long text in schema drawer.

Co-authored-by: Alison <[email protected]>

This was broken by upstream changes.