FrancescoCastaldi commented on issue #45481:
URL: https://github.com/apache/superset/issues/45481#issuecomment-6524023196
### Root Cause Analysis & Solution
In `superset/db_engine_specs/base.py`, `_default_column_type_mappings` maps
`smallint`, `int`, and `bigint` to `GenericDataType.NUMERIC`, but does not
contain a mapping for `tinyint`.
When filtering against a `tinyint` column on engines like Trino or AWS
Athena (for example `WHERE status >= 2`), Superset falls back to treating the
column as string, quoting the literal: `WHERE status >= '2'`. This triggers a
database query failure:
`TYPE_MISMATCH: Cannot apply operator: tinyint < varchar`.
#### Solution
In `_default_column_type_mappings`, add:
```python
(
re.compile(r"^tinyint", re.IGNORECASE),
types.SmallInteger(),
GenericDataType.NUMERIC,
),
```
prior to `smallint`.
Verified with unit tests in `tests/unit_tests/db_engine_specs/test_base.py`
and committed to branch `fix/community-unanswered-issues` (commit
`f260c55b252`) at
https://github.com/FrancescoCastaldi/superset/tree/fix/community-unanswered-issues.
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