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fix(dbapi): avoid running % format with no query parameters #348

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merged 4 commits into from Oct 29, 2020
Merged

fix(dbapi): avoid running % format with no query parameters #348

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9b493db
fix: aviod running %format when no query params
HemangChothani Oct 28, 2020
b881e6c
fix: nit
HemangChothani Oct 28, 2020
86b311e
Merge branch 'master' of https://github.com/googleapis/python-bigquer…
HemangChothani Oct 29, 2020
2a336d6
fix: change in unit test
HemangChothani Oct 29, 2020
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2 changes: 1 addition & 1 deletion google/cloud/bigquery/dbapi/cursor.py
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Expand Up @@ -441,7 +441,7 @@ def _format_operation(operation, parameters=None):
if a parameter used in the operation is not found in the
``parameters`` argument.
"""
if parameters is None:
if parameters is None or len(parameters) == 0:
return operation

if isinstance(parameters, collections_abc.Mapping):
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6 changes: 6 additions & 0 deletions tests/unit/test_dbapi_cursor.py
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Expand Up @@ -601,3 +601,9 @@ def test__format_operation_w_too_short_sequence(self):
"SELECT %s, %s;",
("hello",),
)

def test__format_operation_w_empty_dict(self):
from google.cloud.bigquery.dbapi import cursor

formatted_operation = cursor._format_operation("SELECT 1", {})
self.assertEqual(formatted_operation, "SELECT 1")
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Actually, let's put a % sign in this string to catch the reported error

Suggested change
self.assertEqual(formatted_operation, "SELECT 1")
self.assertEqual(formatted_operation, "SELECT '%f'")