Fokko commented on issue #35748:
URL: https://github.com/apache/arrow/issues/35748#issuecomment-1577578808
@jorisvandenbossche Sorry for not being clear. It is not about the concat
operation but about the merge operation. Both of the input arrays are already
unique and sorted. The input arrays can overlap, but the arrays themselves
don't.
The expected output would be:
```
>>> merged_chunked = pa.chunked_array([chunk for arr in [a1, a2] for chunk
in arr.chunks])
>>> merged_chunked.unique()
<pyarrow.lib.Int64Array object at 0x7fe2e692f880>
[
1,
2,
3,
4, <-- 4 comes after 3 and before 6
6,
7, <-- 7 is present in both arrays, but we are interested in the value
just once.
8
]
```
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