DataStrategistTeam opened a new issue, #36808:
URL: https://github.com/apache/superset/issues/36808
### Bug description
**Superset version:** (fill in, e.g. 6.0.0)
**Database:** DuckDB
**Deployment:** ( k8s)
**OS:** (Linux)
---
### Description
When using **DuckDB** as a database in Superset, **SQL Lab queries work**,
but **creating charts in Explore always fails** with:
```
DB engine Error
Authentication required.
Issue 1011 - Superset encountered an unexpected error.
```
This error is misleading: DuckDB does **not support authentication**, and
the connection itself is valid.
---
### Steps to reproduce
1. Add a DuckDB database in Superset
Example SQLAlchemy URI:
```
duckdb:///:memory:
```
2. Go to **SQL Lab** and run:
```sql
SELECT
i AS content_id,
(i * 37) % 500 + 50 AS view_count
FROM range(1, 11) AS r(i);
```
✅ Query runs successfully
3. Click **Explore → Save as Dataset** (Virtual Dataset)
✅ Dataset is created successfully
4. Click **Create Chart** from the dataset
❌ Error occurs:
```
Authentication required (Issue 1011)
```
---
### Expected behavior
* Superset should allow creating charts from DuckDB datasets (physical or
virtual), **or**
* Superset should fail gracefully with a **clear error message** indicating
that DuckDB Explore/metadata reflection is unsupported.
---
### Actual behavior
* SQL Lab works
* Dataset creation works
* Chart creation fails
* Superset throws a **misleading “Authentication required” error**
---
### Additional notes / diagnosis
* This happens with:
* File-backed DuckDB (not `:memory:`)
* Tables, views, and virtual datasets
* Permissions and file access are correct
* The failure appears during **Explore / metadata inspection / reflection**
* The error message is incorrect and makes debugging difficult
---
### Screenshots/recordings
_No response_
### Superset version
master / latest-dev
### Python version
3.9
### Node version
16
### Browser
Chrome
### Additional context
_No response_
### Checklist
- [x] I have searched Superset docs and Slack and didn't find a solution to
my problem.
- [x] I have searched the GitHub issue tracker and didn't find a similar bug
report.
- [x] I have checked Superset's logs for errors and if I found a relevant
Python stacktrace, I included it here as text in the "additional context"
section.
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