sqd opened a new pull request, #10771:
URL: https://github.com/apache/arrow-rs/pull/10771
An Avro record with no fields is legal, and encodes to zero bytes. The
reader accepts such a schema and decodes its (empty) bytes fine, but fails at
flush:
Invalid argument error: use StructArray::try_new_with_length or
StructArray::new_empty_fields to create a struct array with no
fields so that the length can be set correctly
`Decoder::Record` flushes through `StructArray::try_new`, which infers its
length from the first child array, but a zero-field record has no child array.
`RecordDecoder::flush` (the top level) already handles this: it passes its
own `row_count` through `RecordBatchOptions::with_row_count`. This change gives
the nested case the same treatment. `Decoder::Record` now carries a row count,
incremented wherever a row is appended and reset at `flush`.
# Which issue does this PR close?
- Closes #10770.
# Are these changes tested?
See included tests.
# Are there any user-facing changes?
No
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