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docs: Update UPDATING.md regarding potential breaking change to `ab_user.email` column (#25115) 

Co-authored-by: Michael S. Molina <70410625+michael-s-molina@users.noreply.github.com>
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John Bodley 2023-08-30 04:42:23 -07:00 committed by GitHub
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UPDATING.md
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@ -24,6 +24,7 @@ assists people when migrating to a new version.
## Next
- [25053](https://github.com/apache/superset/pull/25053): Extends the `ab_user.email` column from 64 to 320 characters which has an associated unique key constraint. This will problematic for MySQL metadata databases which use the InnoDB storage engine with the `innodb_large_prefix` parameter disabled as the key prefix limit is 767 bytes. Enabling said parameter and ensuring that the table uses either the use the `DYNAMIC` or `COMPRESSED` row format should remedy the problem. See [here](https://dev.mysql.com/doc/refman/5.7/en/innodb-limits.html) for more details.
- [24939](https://github.com/apache/superset/pull/24939): Augments the foreign key constraints for the `embedded_dashboards` table to include an explicit CASCADE ON DELETE to ensure the relevant records are deleted when a dashboard is deleted. Scheduled downtime may be advised.
- [24938](https://github.com/apache/superset/pull/24938): Augments the foreign key constraints for the `dashboard_slices` table to include an explicit CASCADE ON DELETE to ensure the relevant records are deleted when a dashboard or slice is deleted. Scheduled downtime may be advised.
- [24911](https://github.com/apache/superset/pull/24911): Changes the column type from `TEXT` to `MediumText` in table `logs`, potentially requiring a table lock on MySQL dbs or taking some time to complete on large deployments.

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docs/docs/installation/configuring-superset.mdx
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@ -106,7 +106,7 @@ Superset supports the following database engines/versions:
| Database Engine | Supported Versions |
| --------------------------------------------------------- | ---------------------------------- |
| [PostgreSQL](https://www.postgresql.org/) | 10.X, 11.X, 12.X, 13.X, 14.X, 15.X |
| [MySQL](https://www.mysql.com/) | 5.X |
| [MySQL](https://www.mysql.com/) | 5.7, 8.X |
Use the following database drivers and connection strings: