fix: handle Avro reader schema with no fields#9611
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mzabaluev wants to merge 3 commits intoapache:mainfrom
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fix: handle Avro reader schema with no fields#9611mzabaluev wants to merge 3 commits intoapache:mainfrom
mzabaluev wants to merge 3 commits intoapache:mainfrom
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In the degenerate case when the Avro reader schema has no fields, the RecordDecoder should be able to produce empty record batches with the number of rows counted from the data.
In arrow-avro. Since the async reader only reads OCF files and uses decode_block to decode, use flush_block for consistency and to avoid unnecessary checks.
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Which issue does this PR close?
Rationale for this change
In the degenerate case when the Avro reader schema has no fields, the
RecordDecodershould be able to produce empty record batches with the number of rows counted from the data. As an optimization for OCF, the reader could skip decoding altogether, relying on record counts provided by data blocks.What changes are included in this PR?
A row counter is run in the
RecordDecoderstate.Are these changes tested?
Added tests to verify decoder behavior given an empty reader schema for the data files in the test suite.
Are there any user-facing changes?
No.