ENH: Improve the error message in to_gbq when the DataFrame schema do…

…es not match pandas-dev#11359
parthea · Oct 21, 2015 · 21494bb · 21494bb
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diff --git a/doc/source/whatsnew/v0.17.1.txt b/doc/source/whatsnew/v0.17.1.txt
@@ -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:
 

diff --git a/pandas/io/gbq.py b/pandas/io/gbq.py
@@ -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)