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Diffstat (limited to 'django/db/models/sql/query.py')
| -rw-r--r-- | django/db/models/sql/query.py | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/django/db/models/sql/query.py b/django/db/models/sql/query.py index a79d66eb21..ce4fafb1e2 100644 --- a/django/db/models/sql/query.py +++ b/django/db/models/sql/query.py @@ -972,6 +972,8 @@ class Query(BaseExpression): relabelling any references to them in select columns and the where clause. """ + if not change_map: + return self # If keys and values of change_map were to intersect, an alias might be # updated twice (e.g. T4 -> T5, T5 -> T6, so also T4 -> T6) depending # on their order in change_map. |