izveigor opened a new issue, #7289:
URL: https://github.com/apache/arrow-datafusion/issues/7289
### Is your feature request related to a problem or challenge?
## Summary
| Characteristic | Description
|
| --------------------- |
------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|
| Function name: | `array_distinct`
|
| Aliases: | `list_distinct`
|
| Original function?: | No
|
| Function Description: | <b>DuckDB:</b> Removes all duplicates and NULLs
from a list. Does not preserve the original order. <br/> <b>Azure
DataBricks:</b> Removes duplicate values from array. <br/> <b>SQL Spark:</b>
Return distinct values from the array after removing duplicates.
|
| Sources: |
[Concept](https://github.com/apache/arrow-datafusion/discussions/6855)
[DuckDB](https://duckdb.org/docs/sql/functions/nested)
[Azure](https://learn.microsoft.com/en-us/azure/databricks/sql/language-manual/functions/array_distinct)
[Spark](https://sparkbyexamples.com/spark/spark-sql-array-functions/) |
## Examples:
```
D select array_distinct([1, 3, 2, 3, 1, 2, 4]);
┌──────────────────────────────────────────────────────┐
│ array_distinct(main.list_value(1, 3, 2, 3, 1, 2, 4)) │
│ int32[] │
├──────────────────────────────────────────────────────┤
│ [4, 2, 3, 1] │
└──────────────────────────────────────────────────────┘
```
```
D select array_distinct(['a', 'b', 'c', 'd']);
┌─────────────────────────────────────────────────────┐
│ array_distinct(main.list_value('a', 'b', 'c', 'd')) │
│ varchar[] │
├─────────────────────────────────────────────────────┤
│ [b, d, c, a] │
└─────────────────────────────────────────────────────┘
```
### Describe the solution you'd like
_No response_
### Describe alternatives you've considered
_No response_
### Additional context
_No response_
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