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ENH: Improve the error message in to_gbq when schema does not match #11359 #11401

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Oct 21, 2015
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ENH: Improve the error message in to_gbq when schema does not match #11359 #11401

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1 change: 1 addition & 0 deletions doc/source/whatsnew/v0.17.1.txt
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Expand Up @@ -30,6 +30,7 @@ Other Enhancements

- ``pd.read_*`` functions can now also accept :class:`python:pathlib.Path`, or :class:`py:py._path.local.LocalPath`
objects for the ``filepath_or_buffer`` argument. (:issue:`11033`)
- Improve the error message displayed in :func:`pandas.io.gbq.to_gbq` when the DataFrame does not match the schema of the destination table (:issue:`11359`)

.. _whatsnew_0171.api:

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3 changes: 2 additions & 1 deletion pandas/io/gbq.py
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Expand Up @@ -511,7 +511,8 @@ def to_gbq(dataframe, destination_table, project_id, chunksize=10000,
connector.delete_and_recreate_table(dataset_id, table_id, table_schema, verbose)
elif if_exists == 'append':
if not connector.verify_schema(dataset_id, table_id, table_schema):
raise InvalidSchema("The schema of the destination table does not match")
raise InvalidSchema("Please verify that the column order, structure and data types in the DataFrame "
"match the schema of the destination table.")
else:
table.create(table_id, table_schema)

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