array functions don't work with FixedSizeList

[universalmind303]

Describe the bug

none of the scalar array_ functions work on FixedSizeList dtype.

To Reproduce

given a table of

+-----------------+--------+
| fixed_size_list | list   |
+-----------------+--------+
| [0, 1]          | [0, 1] |
| [0, 2]          | [0, 2] |
+-----------------+--------+

I should be able to use array_* functions on both list and fixed_size_list fields

SELECT array_length(list) FROM my_table

+-----------------------------+
| array_length(my_table.list) |
+-----------------------------+
| 2                           |
| 2                           |
+-----------------------------+

Full reproducible example here: https://gist.github.com/universalmind303/e2e59cd6d84656f5f20e78bd6e9c6c74

Expected behavior

SELECT array_length(fixed_size_list) FROM my_table

+----------------------------------------+
| array_length(my_table.fixed_size_list) |
+----------------------------------------+
| 2                                      |
| 2                                      |
+----------------------------------------+

Additional context

I don't think all of them should work. Such as ones that mutate the array (repeat, remove, ...). But I'd expect many of the immutable functions to work such as has, length, element, and so on.

[alamb]

The same thing probably goes for LargeList as well (it isn't supported)

[Weijun-H]

The same thing probably goes for LargeList as well (it isn't supported)

Yes, I believe the array function now only accepts List. I am happy to take this ticket.

[alamb]

Yes, I believe the array function now only accepts List. I am happy to take this ticket.

Thanks @Weijun-H

In order to make this project tractable, I suggest picking one array function (ideally a simple one) and figuring out a good pattern for:

1. Testing
2. Implementing

In particular, I think this may require writing some generic code (over OffsetSize) trait

[jayzhan211]

For LargeList, you can take #7897 for reference