jamescorbett opened a new issue #1390:
URL: https://github.com/apache/arrow-rs/issues/1390
**Describe the bug**
try_from_sparse_iter expects at least one item to have Some to determine the
size. This is a bad assumption as it may recieve all Nones.
InvalidArgumentError("column types must match schema types, expected
FixedSizeBinary(32) but found FixedSizeBinary(0) at column index 0"
**To Reproduce**
`
let none_option: Option<[u8; 32]> = None;
let item = arrow::array::FixedSizeBinaryArray::try_from_sparse_iter(
vec![none_option, none_option, none_option].into_iter(),
)
.unwrap();
let rb = arrow::record_batch::RecordBatch::try_new(
arrow_schema.clone(),
vec![std::sync::Arc::new(item)],
)
.unwrap();
`
**Expected behavior**
A record batch with a colum of all nulls.
**Additional context**
I would suggest fixing it by changing the behaviour of defaulting in
**array_binary.rs**
`
let size = size.unwrap_or(0);
`
or changing the schema validation to handle a 0 size if the array is empty.
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