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BUG: to_sql convert index name to string (#15404) #15423

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merged 4 commits into from
Feb 17, 2017
Merged

BUG: to_sql convert index name to string (#15404) #15423

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73d20c0
Converted index name to string to fix issue #15404 - BUG: to_sql erro…
redbullpeter Feb 16, 2017
ee53748
Additional int to string conversion added. Associated test cases added.
redbullpeter Feb 16, 2017
2f4fbba
PEP 8 compliance edits
redbullpeter Feb 16, 2017
e9a4f3a
Removed extraneous brackets
redbullpeter Feb 16, 2017
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5 changes: 3 additions & 2 deletions pandas/io/sql.py
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Original file line number Diff line number Diff line change
Expand Up @@ -750,7 +750,8 @@ def _get_column_names_and_types(self, dtype_mapper):
for i, idx_label in enumerate(self.index):
idx_type = dtype_mapper(
self.frame.index.get_level_values(i))
column_names_and_types.append((idx_label, idx_type, True))
column_names_and_types.append((text_type(idx_label),
idx_type, True))

column_names_and_types += [
(text_type(self.frame.columns[i]),
Expand Down Expand Up @@ -1220,7 +1221,7 @@ def _create_sql_schema(self, frame, table_name, keys=None, dtype=None):

def _get_unicode_name(name):
try:
uname = name.encode("utf-8", "strict").decode("utf-8")
uname = text_type(name).encode("utf-8", "strict").decode("utf-8")
except UnicodeError:
raise ValueError("Cannot convert identifier to UTF-8: '%s'" % name)
return uname
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15 changes: 15 additions & 0 deletions pandas/tests/io/test_sql.py
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Original file line number Diff line number Diff line change
Expand Up @@ -709,6 +709,21 @@ def test_to_sql_index_label(self):
self.assertEqual(frame.columns[0], 'other_label',
"Specified index_label not written to database")

# index name is integer
temp_frame.index.name = 0
sql.to_sql(temp_frame, 'test_index_label', self.conn,
if_exists='replace')
frame = sql.read_sql_query('SELECT * FROM test_index_label', self.conn)
self.assertEqual(frame.columns[0], '0',
"Integer index label not written to database")

temp_frame.index.name = None
sql.to_sql(temp_frame, 'test_index_label', self.conn,
if_exists='replace', index_label=0)
frame = sql.read_sql_query('SELECT * FROM test_index_label', self.conn)
self.assertEqual(frame.columns[0], '0',
"Integer index label not written to database")

def test_to_sql_index_label_multiindex(self):
temp_frame = DataFrame({'col1': range(4)},
index=MultiIndex.from_product(
Expand Down