Details
-
Bug
-
Status: Closed
-
Major
-
Resolution: Information Provided
-
None
-
None
-
None
Description
Attempting to write/read dictionaries nested in a list to an IPC stream results in an error:
fn send_receive() -> std::result::Result<(), Box<dyn std::error::Error>> {
let fields_vec = vec!["fields1", "fields2"];
let fields_list = {
let mut b = ListBuilder::with_capacity(StringDictionaryBuilder::new(PrimitiveBuilder::<Int32Type>::new(2), StringBuilder::new(2)), 1);
for f in &fields_vec {
b.values().append(f).unwrap();
}
b.append(true)?;
b.finish()
};
let schema = Arc::new(Schema::new(vec![Field::new("fields", fields_list.data_type().clone(), false)]));
let batch = RecordBatch::try_new(schema.clone(),vec![Arc::new(fields_list)])?;
let buf = Vec::with_capacity(1024 * 32);
let mut writer = arrow::ipc::writer::StreamWriter::try_new(buf, &schema)?;
writer.write(&batch)?;
writer.finish()?; let reader = &writer.into_inner()?[..];
let mut reader = arrow::ipc::reader::StreamReader::try_new(reader)?;
while let Some(n) = reader.next() {
let b = n?;
println!("Parsed batch: {:?}", b);
}
Ok(())
}
fn main() {
println!("Sending DictionaryArray in a list");
match send_receive() {
Ok(_) => println!("Encoded and decoded successfully"),
Err(e) => panic!("{:?}", e)
}
}
The error:
Sending DictionaryArray in a list thread 'main' panicked at 'index out of bounds: the len is 1 but the index is 1', .cargo/registry/src/github.com-1ecc6299db9ec823/arrow-6.2.0/src/ipc/reader.rs:176:31 stack backtrace: 0: rust_begin_unwind 1: core::panicking::panic_fmt 2: core::panicking::panic_bounds_check 3: arrow::ipc::reader::create_array at .cargo/registry/src/github.com-1ecc6299db9ec823/arrow-6.2.0/src/ipc/reader.rs:176:31 4: arrow::ipc::reader::create_array at .cargo/registry/src/github.com-1ecc6299db9ec823/arrow-6.2.0/src/ipc/reader.rs:100:26 5: arrow::ipc::reader::read_record_batch at .cargo/registry/src/github.com-1ecc6299db9ec823/arrow-6.2.0/src/ipc/reader.rs:432:22 6: arrow::ipc::reader::StreamReader<R>::maybe_next at .cargo/registry/src/github.com-1ecc6299db9ec823/arrow-6.2.0/src/ipc/reader.rs:875:17 7: <arrow::ipc::reader::StreamReader<R> as core::iter::traits::iterator::Iterator>::next at .cargo/registry/src/github.com-1ecc6299db9ec823/arrow-6.2.0/src/ipc/reader.rs:908:9 8: rust_arrow::send_receive at ./src/main.rs:58:25 9: rust_arrow::main at ./src/main.rs:81:11