izveigor opened a new issue, #6981:
URL: https://github.com/apache/arrow-datafusion/issues/6981
### Is your feature request related to a problem or challenge?
## Summary
| Characteristic | Description
|
| --------------------- |
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
|
| Function name: | `array_union`
|
| Aliases: | `list_union`
|
| Original function?: | No
|
| Function Description: | <b>Azure DataBricks:</b> Returns an array of the
elements in the union of array1 and array2 without duplicates. </br> <b>Spark
SQL:</b> Returns an array of elements that are present in both arrays (all
elements from both arrays) with out duplicates. |
| Sources: |
[Concept](https://github.com/apache/arrow-datafusion/discussions/6855)
[Azure](https://learn.microsoft.com/en-us/azure/databricks/sql/language-manual/functions/array_union)
[Spark](https://sparkbyexamples.com/spark/spark-sql-array-functions/) |
## Examples:
```
select array_union([1, 2, 3, 4], [5, 6, 3, 4]);
----
[3, 4]
```
```
select array_union([1, 2, 3, 4], [5, 6, 7, 8]);
----
[]
```
### Describe the solution you'd like
_No response_
### Describe alternatives you've considered
_No response_
### Additional context
_No response_
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