comphead opened a new issue, #5231:
URL: https://github.com/apache/arrow-datafusion/issues/5231
**Is your feature request related to a problem or challenge? Please describe
what you are trying to do.**
SQLLogic test fails on schema validation when column has mixed null and non
null values.
```
# log scalar function
query CC1 rowsort
select null union all select 1
Error: query failed: DataFusion error: Internal error: Schema mismatch.
Previously had
Schema {
fields: [
Field {
name: "NULL",
data_type: Int64,
nullable: false,
dict_id: 0,
dict_is_ordered: false,
metadata: {},
},
],
metadata: {},
}
Got:
Schema {
fields: [
Field {
name: "NULL",
data_type: Int64,
nullable: true,
dict_id: 0,
dict_is_ordered: false,
metadata: {},
},
],
metadata: {},
}. This was likely caused by a bug in DataFusion's code and we would welcome
that you file an bug report in our issue tracker
```
**Describe the solution you'd like**
I think we can ignore `nullable` attribute from schema
**Describe alternatives you've considered**
Workaround to split queries to avoid mixed nulls and nonnulls
**Additional context**
Add any other context or screenshots about the feature request here.
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