Michael Chirico created ARROW-7662:
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Summary: Support for auto-inferring list column->array in
write_parquet
Key: ARROW-7662
URL: https://issues.apache.org/jira/browse/ARROW-7662
Project: Apache Arrow
Issue Type: Improvement
Components: R
Reporter: Michael Chirico
{code:r}
DF = data.frame(a = 1:10)
DF$b = as.list(DF$a)
arrow::write_parquet(DF, 'test.parquet')
# Error in Table__from_dots(dots, schema) : cannot infer type from data
{code}
This appears to be supported naturally already in Python:
{code:python}
import pandas as pd
pd.DataFrame({'a': [1, 2, 3], 'b': [[1, 2], [3, 4], [5,
6]]}).to_parquet('test.parquet')
{code}
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