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BUG: read_parquet doesn't handle index names correctly #6543

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3 tasks done
zmbc opened this issue Sep 8, 2023 · 0 comments · Fixed by #6545
Closed
3 tasks done

BUG: read_parquet doesn't handle index names correctly #6543

zmbc opened this issue Sep 8, 2023 · 0 comments · Fixed by #6545
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bug 🦗 Something isn't working External Pull requests and issues from people who do not regularly contribute to modin P1 Important tasks that we should complete soon pandas concordance 🐼 Functionality that does not match pandas

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@zmbc
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zmbc commented Sep 8, 2023

Modin version checks

  • I have checked that this issue has not already been reported.

  • I have confirmed this bug exists on the latest released version of Modin.

  • I have confirmed this bug exists on the main branch of Modin. (In order to do this you can follow this guide.)

Reproducible Example

import pandas

my_data = pandas.DataFrame({'a': range(10), 'b': range(10, 20)})
my_data.index.name = "foobar"

my_data.to_parquet("index_with_name.parquet")

import modin.pandas

modin.pandas.read_parquet("index_with_name.parquet")

Issue Description

read_parquet errors instead of loading the dataframe.

Note that this was the case before #6442 -- it is not related to filters or to the code change to accommodate them.

Expected Behavior

Pandas behavior:

# Check that the engine doesn't matter
df_pyarrow = pandas.read_parquet("index_with_name.parquet", engine="pyarrow")
df_fastparquet = pandas.read_parquet("index_with_name.parquet", engine="fastparquet")

assert df_pyarrow.equals(df_fastparquet)

print(df_pyarrow)

gives

        a   b
foobar       
0       0  10
1       1  11
2       2  12
3       3  13
4       4  14
5       5  15
6       6  16
7       7  17
8       8  18
9       9  19

Error Logs

Traceback (most recent call last):
  File "~/src/modin/test_index_with_name.py", line 20, in <module>
    modin.pandas.read_parquet("index_with_name.parquet")
  File "~/src/modin/modin/utils.py", line 475, in wrapped
    return func(*params.args, **params.kwargs)
  File "~/src/modin/modin/logging/logger_decorator.py", line 128, in run_and_log
    return obj(*args, **kwargs)
  File "~/src/modin/modin/pandas/io.py", line 297, in read_parquet
    query_compiler=FactoryDispatcher.read_parquet(
  File "~/src/modin/modin/core/execution/dispatching/factories/dispatcher.py", line 195, in read_parquet
    return cls.get_factory()._read_parquet(**kwargs)
  File "~/src/modin/modin/core/execution/dispatching/factories/factories.py", line 213, in _read_parquet
    return cls.io_cls.read_parquet(**kwargs)
  File "~/src/modin/modin/logging/logger_decorator.py", line 128, in run_and_log
    return obj(*args, **kwargs)
  File "~/src/modin/modin/core/io/file_dispatcher.py", line 159, in read
    query_compiler = cls._read(*args, **kwargs)
  File "~/src/modin/modin/logging/logger_decorator.py", line 128, in run_and_log
    return obj(*args, **kwargs)
  File "~/src/modin/modin/core/io/column_stores/parquet_dispatcher.py", line 725, in _read
    return cls.build_query_compiler(
  File "~/src/modin/modin/logging/logger_decorator.py", line 128, in run_and_log
    return obj(*args, **kwargs)
  File "~/src/modin/modin/core/io/column_stores/parquet_dispatcher.py", line 601, in build_query_compiler
    index, sync_index = cls.build_index(
  File "~/src/modin/modin/logging/logger_decorator.py", line 128, in run_and_log
    return obj(*args, **kwargs)
  File "~/src/modin/modin/core/io/column_stores/parquet_dispatcher.py", line 551, in build_index
    complete_index = dataset.to_pandas_dataframe(
  File "~/src/modin/modin/core/io/column_stores/parquet_dispatcher.py", line 236, in to_pandas_dataframe
    return read_table(
  File "~/mambaforge/envs/modin/lib/python3.10/site-packages/pyarrow/parquet/core.py", line 2986, in read_table
    return dataset.read(columns=columns, use_threads=use_threads,
  File "~/mambaforge/envs/modin/lib/python3.10/site-packages/pyarrow/parquet/core.py", line 2614, in read
    table = self._dataset.to_table(
  File "pyarrow/_dataset.pyx", line 537, in pyarrow._dataset.Dataset.to_table
  File "pyarrow/_dataset.pyx", line 383, in pyarrow._dataset.Dataset.scanner
  File "pyarrow/_dataset.pyx", line 3202, in pyarrow._dataset.Scanner.from_dataset
  File "pyarrow/_dataset.pyx", line 3120, in pyarrow._dataset.Scanner._make_scan_options
  File "pyarrow/_dataset.pyx", line 3071, in pyarrow._dataset._populate_builder
  File "pyarrow/error.pxi", line 100, in pyarrow.lib.check_status
pyarrow.lib.ArrowInvalid: No match for FieldRef.Name(foobar) in a: int64
b: int64
__fragment_index: int32
__batch_index: int32
__last_in_fragment: bool
__filename: string

Installed Versions

INSTALLED VERSIONS

commit : ba1cccd19da778f0c3a7d6a885685da16a072870
python : 3.10.12.final.0
python-bits : 64
OS : Linux
OS-release : 5.4.0-135-generic
Version : #152-Ubuntu SMP Wed Nov 23 20:19:22 UTC 2022
machine : x86_64
processor : x86_64
byteorder : little
LC_ALL : None
LANG : en_US.UTF-8
LOCALE : en_US.UTF-8

pandas : 2.1.0
numpy : 1.25.1
pytz : 2023.3
dateutil : 2.8.2
setuptools : 68.0.0
pip : 23.2.1
Cython : None
pytest : 7.4.0
hypothesis : None
sphinx : 7.1.0
blosc : None
feather : 0.4.1
xlsxwriter : None
lxml.etree : 4.9.3
html5lib : None
pymysql : None
psycopg2 : 2.9.6
jinja2 : 3.1.2
IPython : 8.14.0
pandas_datareader : None
bs4 : 4.12.2
bottleneck : None
dataframe-api-compat: None
fastparquet : 2022.12.0
fsspec : 2023.6.0
gcsfs : None
matplotlib : 3.7.2
numba : None
numexpr : 2.8.4
odfpy : None
openpyxl : 3.1.2
pandas_gbq : 0.15.0
pyarrow : 12.0.1
pyreadstat : None
pyxlsb : None
s3fs : 2023.6.0
scipy : 1.11.1
sqlalchemy : 1.4.45
tables : 3.8.0
tabulate : None
xarray : None
xlrd : 2.0.1
zstandard : None
tzdata : 2023.3
qtpy : 2.3.1
pyqt5 : None

@zmbc zmbc added bug 🦗 Something isn't working Triage 🩹 Issues that need triage labels Sep 8, 2023
zmbc added a commit to zmbc/modin that referenced this issue Sep 9, 2023
zmbc added a commit to zmbc/modin that referenced this issue Sep 9, 2023
zmbc added a commit to zmbc/modin that referenced this issue Sep 9, 2023
@vnlitvinov vnlitvinov added pandas concordance 🐼 Functionality that does not match pandas P1 Important tasks that we should complete soon External Pull requests and issues from people who do not regularly contribute to modin and removed Triage 🩹 Issues that need triage labels Sep 11, 2023
vnlitvinov pushed a commit that referenced this issue Sep 12, 2023
…parquet (#6545)

This change also fixes #6543.

Signed-off-by: Zeb Burke-Conte <[email protected]>
zmbc added a commit to zmbc/modin that referenced this issue Sep 19, 2023
…ames in read_parquet (modin-project#6545)

This change also fixes modin-project#6543.

Signed-off-by: Zeb Burke-Conte <[email protected]>
zmbc added a commit to zmbc/modin that referenced this issue Sep 19, 2023
…ames in read_parquet (modin-project#6545)

This change also fixes modin-project#6543.

Signed-off-by: Zeb Burke-Conte <[email protected]>
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