[jira] [Created] (ARROW-1276) Cannot serializer empty DataFrame to parquet

["Marco Neumann (JIRA)" <ji...@apache.org>]

Marco Neumann created ARROW-1276:
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             Summary: Cannot serializer empty DataFrame to parquet
                 Key: ARROW-1276
                 URL: https://issues.apache.org/jira/browse/ARROW-1276
             Project: Apache Arrow
          Issue Type: Bug
          Components: Python
    Affects Versions: 0.5.0
            Reporter: Marco Neumann
            Priority: Minor


The following code fails with {{pyarrow.lib.ArrowInvalid: Invalid: chunk size per row_group must be greater than 0}} but should not:

{noformat}
import pandas as pd
import pyarrow as pa
import pyarrow.parquet as pq

df = pd.DataFrame({'x': pd.Series([], dtype=int)})
table = pa.Table.from_pandas(df)
buf = pa.InMemoryOutputStream()
pq.write_table(table, buf)
{noformat}

I have a test and a fix prepared and will upstream both in the upcoming days.



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