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Posted to github@datafusion.apache.org by "timsaucer (via GitHub)" <gi...@apache.org> on 2026/01/23 00:58:03 UTC
[I] Regression: `array_sort` fails on list with inner non-nullable field [datafusion]
timsaucer opened a new issue, #19947:
URL: https://github.com/apache/datafusion/issues/19947
### Describe the bug
When you have a ListArray and the inner field is non-nullable, `array_sort` generates an error in 51.0.0. See below for steps to reproduce.
### To Reproduce
The following generates an error:
```sql
select array_sort(arrow_cast(make_array(1, 3, 5, -5), 'List(non-null Int32)'));
```
> DataFusion error: Internal("Assertion failed: result_data_type == *expected_type: Function 'array_sort' returned value of type 'List(Field { data_type: Int32 })' while the following type was promised at planning time and expected: 'List(Field { data_type: Int32, nullable: true })'")
### Expected behavior
You cannot do the above sql with 50.0.0 but I did test by manually creating and registering a record batch that has a list array with inner non-nullable field. It passes in 50.0.0 and fails in 51.0.0.
### Additional context
I believe this was introduced in https://github.com/apache/datafusion/pull/17657
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Re: [I] Regression: `array_sort` fails on list with inner non-nullable field [datafusion]
Posted by "Jefffrey (via GitHub)" <gi...@apache.org>.
Jefffrey commented on issue #19947:
URL: https://github.com/apache/datafusion/issues/19947#issuecomment-3787936106
Whoops! Thanks for spotting this, should be a quick fix 👍
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Re: [I] Regression: `array_sort` fails on list with inner non-nullable field [datafusion]
Posted by "timsaucer (via GitHub)" <gi...@apache.org>.
timsaucer commented on issue #19947:
URL: https://github.com/apache/datafusion/issues/19947#issuecomment-3787619301
FYI @Jefffrey
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Re: [I] Regression: `array_sort` fails on list with inner non-nullable field [datafusion]
Posted by "alamb (via GitHub)" <gi...@apache.org>.
alamb commented on issue #19947:
URL: https://github.com/apache/datafusion/issues/19947#issuecomment-4034049312
I am scoping out bugs / regressions to backport to `branch-52` if we make another patchset release
Would this be a good candidate?
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Re: [I] Regression: `array_sort` fails on list with inner non-nullable field [datafusion]
Posted by "comphead (via GitHub)" <gi...@apache.org>.
comphead closed issue #19947: Regression: `array_sort` fails on list with inner non-nullable field
URL: https://github.com/apache/datafusion/issues/19947
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