raulcd opened a new issue, #44651:
URL: https://github.com/apache/arrow/issues/44651
### Describe the usage question you have. Please include as many useful
details as possible.
I am trying to create a pyarrow string view array using from_buffers but it
does not seem to be correctly supported, or I might not know how to use it:
I tried this basic snippet:
```
>>> import pyarrow as pa
>>> array = pa.array(['String longer than 12 characters', 'Short', None],
type=pa.string_view())
>>> pa.StringViewArray.from_buffers(pa.string_view(), len(array1),
array1.buffers())
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "pyarrow/array.pxi", line 1178, in pyarrow.lib.Array.from_buffers
ValueError: Type's expected number of buffers (2) did not match the passed
number (3).
```
If I try removing the null bitmap buffers to only pass the views buffer +
the data buffer it complains on the buffer size:
```
>>> pa.StringViewArray.from_buffers(pa.string_view(), len(array1),
[array1.buffers()[1], array.buffers()[2]])
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
File "pyarrow/array.pxi", line 1193, in pyarrow.lib.Array.from_buffers
File "pyarrow/array.pxi", line 1686, in pyarrow.lib.Array.validate
File "pyarrow/error.pxi", line 92, in pyarrow.lib.check_status
pyarrow.lib.ArrowInvalid: Buffer #1 too small in array of type string_view
and length 3: expected at least 48 byte(s), got 32
```
If the buffer is wrong (just change the order to avoid the complaints about
size) I get a segmentation fault:
```
>>> pa.StringViewArray.from_buffers(pa.string_view(), len(array1),
[array1.buffers()[2], array.buffers()[3]])
Traceback (most recent call last):
File "<stdin>", line 1, in <module>
IndexError: list index out of range
>>> pa.StringViewArray.from_buffers(pa.string_view(), len(array1),
[array1.buffers()[2], array.buffers()[1]])
Segmentation fault (core dumped)
```
I am unsure if this is just me not knowing how to use `from_buffers` or if
there is an issue with string view.
### Component(s)
Python
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