[jira] [Updated] (ARROW-5139) [Python/C++] Empty column selection no longer restores index

2023-01-10 Thread Rok Mihevc (Jira) 


 [ 
https://issues.apache.org/jira/browse/ARROW-5139?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Rok Mihevc updated ARROW-5139:
--
External issue URL: https://github.com/apache/arrow/issues/21621

> [Python/C++] Empty column selection no longer restores index
> 
>
> Key: ARROW-5139
> URL: https://issues.apache.org/jira/browse/ARROW-5139
> Project: Apache Arrow
>  Issue Type: Bug
>  Components: C++, Python
>Affects Versions: 0.12.1
>Reporter: Florian Jetter
>Priority: Minor
>  Labels: parquet
>
> The index of a dataframe is no longer reconstructed when using empty column 
> selection. This is a regression to 0.12.1 and probably only happens for 
> pd.RangeIndex
> {code:python}
> import pandas as pd
> import pyarrow as pa
> import pyarrow.parquet as pq
> from kartothek.serialization import ParquetSerializer
> from storefact import get_store_from_url
> print(pa.__version__)
> df = pd.DataFrame(
> {"a": [1, 2]}
> )
> print(df.index)
> table = pa.Table.from_pandas(df)
> buf = pa.BufferOutputStream()
> pq.write_table(table, buf)
> reader = pa.BufferReader(buf.getvalue().to_pybytes())
> table_restored = pq.read_pandas(reader, columns=[])
> df_restored = table_restored.to_pandas()
> print(len(df_restored))
> {code}



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[jira] [Updated] (ARROW-5139) [Python/C++] Empty column selection no longer restores index

2021-06-21 Thread Wes McKinney (Jira) 


 [ 
https://issues.apache.org/jira/browse/ARROW-5139?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Wes McKinney updated ARROW-5139:

Fix Version/s: (was: 5.0.0)

> [Python/C++] Empty column selection no longer restores index
> 
>
> Key: ARROW-5139
> URL: https://issues.apache.org/jira/browse/ARROW-5139
> Project: Apache Arrow
>  Issue Type: Bug
>  Components: C++, Python
>Affects Versions: 0.12.1
>Reporter: Florian Jetter
>Priority: Minor
>  Labels: parquet
>
> The index of a dataframe is no longer reconstructed when using empty column 
> selection. This is a regression to 0.12.1 and probably only happens for 
> pd.RangeIndex
> {code:python}
> import pandas as pd
> import pyarrow as pa
> import pyarrow.parquet as pq
> from kartothek.serialization import ParquetSerializer
> from storefact import get_store_from_url
> print(pa.__version__)
> df = pd.DataFrame(
> {"a": [1, 2]}
> )
> print(df.index)
> table = pa.Table.from_pandas(df)
> buf = pa.BufferOutputStream()
> pq.write_table(table, buf)
> reader = pa.BufferReader(buf.getvalue().to_pybytes())
> table_restored = pq.read_pandas(reader, columns=[])
> df_restored = table_restored.to_pandas()
> print(len(df_restored))
> {code}



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[jira] [Updated] (ARROW-5139) [Python/C++] Empty column selection no longer restores index

2021-04-07 Thread Joris Van den Bossche (Jira) 


 [ 
https://issues.apache.org/jira/browse/ARROW-5139?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Joris Van den Bossche updated ARROW-5139:
-
Fix Version/s: (was: 4.0.0)
   5.0.0

> [Python/C++] Empty column selection no longer restores index
> 
>
> Key: ARROW-5139
> URL: https://issues.apache.org/jira/browse/ARROW-5139
> Project: Apache Arrow
>  Issue Type: Bug
>  Components: C++, Python
>Affects Versions: 0.12.1
>Reporter: Florian Jetter
>Priority: Minor
>  Labels: parquet
> Fix For: 5.0.0
>
>
> The index of a dataframe is no longer reconstructed when using empty column 
> selection. This is a regression to 0.12.1 and probably only happens for 
> pd.RangeIndex
> {code:python}
> import pandas as pd
> import pyarrow as pa
> import pyarrow.parquet as pq
> from kartothek.serialization import ParquetSerializer
> from storefact import get_store_from_url
> print(pa.__version__)
> df = pd.DataFrame(
> {"a": [1, 2]}
> )
> print(df.index)
> table = pa.Table.from_pandas(df)
> buf = pa.BufferOutputStream()
> pq.write_table(table, buf)
> reader = pa.BufferReader(buf.getvalue().to_pybytes())
> table_restored = pq.read_pandas(reader, columns=[])
> df_restored = table_restored.to_pandas()
> print(len(df_restored))
> {code}



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[jira] [Updated] (ARROW-5139) [Python/C++] Empty column selection no longer restores index

2021-02-19 Thread Wes McKinney (Jira) 


 [ 
https://issues.apache.org/jira/browse/ARROW-5139?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Wes McKinney updated ARROW-5139:

Fix Version/s: 4.0.0

> [Python/C++] Empty column selection no longer restores index
> 
>
> Key: ARROW-5139
> URL: https://issues.apache.org/jira/browse/ARROW-5139
> Project: Apache Arrow
>  Issue Type: Bug
>  Components: C++, Python
>Affects Versions: 0.12.1
>Reporter: Florian Jetter
>Priority: Minor
>  Labels: parquet
> Fix For: 4.0.0
>
>
> The index of a dataframe is no longer reconstructed when using empty column 
> selection. This is a regression to 0.12.1 and probably only happens for 
> pd.RangeIndex
> {code:python}
> import pandas as pd
> import pyarrow as pa
> import pyarrow.parquet as pq
> from kartothek.serialization import ParquetSerializer
> from storefact import get_store_from_url
> print(pa.__version__)
> df = pd.DataFrame(
> {"a": [1, 2]}
> )
> print(df.index)
> table = pa.Table.from_pandas(df)
> buf = pa.BufferOutputStream()
> pq.write_table(table, buf)
> reader = pa.BufferReader(buf.getvalue().to_pybytes())
> table_restored = pq.read_pandas(reader, columns=[])
> df_restored = table_restored.to_pandas()
> print(len(df_restored))
> {code}



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[jira] [Updated] (ARROW-5139) [Python/C++] Empty column selection no longer restores index

2020-06-16 Thread Neal Richardson (Jira) 


 [ 
https://issues.apache.org/jira/browse/ARROW-5139?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
 ]

Neal Richardson updated ARROW-5139:
---
Fix Version/s: (was: 1.0.0)

> [Python/C++] Empty column selection no longer restores index
> 
>
> Key: ARROW-5139
> URL: https://issues.apache.org/jira/browse/ARROW-5139
> Project: Apache Arrow
>  Issue Type: Bug
>  Components: C++, Python
>Affects Versions: 0.12.1
>Reporter: Florian Jetter
>Priority: Minor
>  Labels: parquet
>
> The index of a dataframe is no longer reconstructed when using empty column 
> selection. This is a regression to 0.12.1 and probably only happens for 
> pd.RangeIndex
> {code:python}
> import pandas as pd
> import pyarrow as pa
> import pyarrow.parquet as pq
> from kartothek.serialization import ParquetSerializer
> from storefact import get_store_from_url
> print(pa.__version__)
> df = pd.DataFrame(
> {"a": [1, 2]}
> )
> print(df.index)
> table = pa.Table.from_pandas(df)
> buf = pa.BufferOutputStream()
> pq.write_table(table, buf)
> reader = pa.BufferReader(buf.getvalue().to_pybytes())
> table_restored = pq.read_pandas(reader, columns=[])
> df_restored = table_restored.to_pandas()
> print(len(df_restored))
> {code}



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