rickysaltzer opened a new pull request, #21139:
URL: https://github.com/apache/superset/pull/21139
### SUMMARY
- Previously, when users execute an ad-hoc query through the SQL lab
interface,
their username was not provided, and the `current_user` global was not
available.
This resulted in the error described in #20455
- This patch provides the `DB_CONNECTION_MUTATOR` override the user
executing the
ad-hoc query so that their credentials can be properly looked up.
### TESTING INSTRUCTIONS
Implement `DB_CONNECTION_MUTATOR` method to enable user impersonation when
executing ad-hoc queries. Then, issue a query from the SQL-Lab page.
### ADDITIONAL INFORMATION
<!--- Check any relevant boxes with "x" -->
<!--- HINT: Include "Fixes #nnn" if you are fixing an existing issue -->
- [x] Has associated issue:
- [ ] Required feature flags:
- [ ] Changes UI
- [ ] Includes DB Migration (follow approval process in
[SIP-59](https://github.com/apache/superset/issues/13351))
- [ ] Migration is atomic, supports rollback & is backwards-compatible
- [ ] Confirm DB migration upgrade and downgrade tested
- [ ] Runtime estimates and downtime expectations provided
- [ ] Introduces new feature or API
- [ ] Removes existing feature or API
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