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Posted to issues@arrow.apache.org by "Sascha Hofmann (JIRA)" <ji...@apache.org> on 2019/07/26 10:47:00 UTC

[jira] [Created] (ARROW-6046) Slice RecordBatch of String array with offset 0

Sascha Hofmann created ARROW-6046:
-------------------------------------

             Summary: Slice RecordBatch of String array with offset 0
                 Key: ARROW-6046
                 URL: https://issues.apache.org/jira/browse/ARROW-6046
             Project: Apache Arrow
          Issue Type: Bug
          Components: C++, Python
    Affects Versions: 0.14.1
            Reporter: Sascha Hofmann


We are seeing a very similar bug as in ARROW-809, just for a RecordBatch of strings. A slice of a RecordBatch with a string column and offset =0 returns the whole batch instead.

 
{code:java}
import pandas as pd
import pyarrow as pa
df = pd.DataFrame({ 'b': ['test' for x in range(1000_000)]})
tbl = pa.Table.from_pandas(df)
batch = tbl.to_batches()[0]

batch.slice(0,2).serialize().size
# 4000232

batch.slice(1,2).serialize().size
# 240
{code}
 



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