r-priyam commented on issue #37625:
URL: https://github.com/apache/arrow/issues/37625#issuecomment-1711557347
Hi @js8544, Thank you for getting back.
>I don't see any dictionary in your example though. Am I missing something?
The array you provided is of type list<item: struct<key: int64>>
Apologies, you're right, my bad.
When I do -
```py
>>> arr = pa.array([[{'key': 1}], None, None])
>>> pa.compute.coalesce(arr, pa.scalar([None],
type=pa.list_(pa.struct([('key', pa.int64())])))).flatten()
<pyarrow.lib.StructArray object at 0x12f4a4b20>
-- is_valid:
[
true,
false,
false
]
-- child 0 type: int64
[
1,
null,
null
]
```
It gives me exactly what I want. But then when I do -
```py
>>> arr = pa.compute.coalesce(pa.array([[{'key': 1}], None, None]),
pa.scalar([None], type=pa.list_(pa.struct([('key', pa.int64())])))).flatten()
>>> arr_two = pa.array([None, 2, None])
>>> arr_three = pa.array([None, None, 3])
>>> pa.compute.coalesce(arr, arr_two, arr_three)
# It throws
File "pyarrow/_compute.pyx", line 367, in pyarrow._compute.Function.call
File "pyarrow/error.pxi", line 144, in
pyarrow.lib.pyarrow_internal_check_status
File "pyarrow/error.pxi", line 121, in pyarrow.lib.check_status
pyarrow.lib.ArrowNotImplementedError: Function 'coalesce' has no kernel
matching input types (struct<key: int64>, int64, int64)
```
In last my aim is to get output in a list `[1, 2, 3]`. Any suggestions on
this please?
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