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ensure overflow batches have the same schema as written tables #20

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ensure overflow batches have the same schema as written tables #20

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8 changes: 7 additions & 1 deletion quadfeather/tiler.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1528,8 +1528,14 @@ def insert_table(self, table: pa.Table):
else:
for sidecar, tb in self.keyed_batches(table).items():
for tb in rebatch(tb.to_batches(), 50e6):
writer_schema = self.overflow_buffers[sidecar].schema
for batch in tb.to_batches():
self.overflow_buffers[sidecar].write_batch(batch)
# ensure the new batch has the exact schema instance from the writer
aligned_batch = pa.RecordBatch.from_arrays(
[batch[field.name] for field in writer_schema],
schema=writer_schema
)
self.overflow_buffers[sidecar].write_batch(aligned_batch)

def keyed_batches(self, table: pa.Table):
"""
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