Replaced set |= operator with update() to avoid temporary set.

2 files changed, 2 insertions, 2 deletions

diff --git a/django/db/models/base.py b/django/db/models/base.py
index 3c1cb9a119..28c2699043 100644
--- a/django/db/models/base.py
+++ b/django/db/models/base.py
@@ -204,7 +204,7 @@ class ModelBase(type):
             if base not in parents or not hasattr(base, '_meta'):
                 # Things without _meta aren't functional models, so they're
                 # uninteresting parents.
-                inherited_attributes |= set(base.__dict__.keys())
+                inherited_attributes.update(base.__dict__)
                 continue
 
             parent_fields = base._meta.local_fields + base._meta.local_many_to_many
diff --git a/django/db/models/sql/query.py b/django/db/models/sql/query.py
index 5c3eca0032..a1c1c4be38 100644
--- a/django/db/models/sql/query.py
+++ b/django/db/models/sql/query.py
@@ -1017,7 +1017,7 @@ class Query:
                     )
                     # The used_joins for a tuple of expressions is the union of
                     # the used_joins for the individual expressions.
-                    used_joins |= set(k for k, v in self.alias_refcount.items() if v > pre_joins.get(k, 0))
+                    used_joins.update(k for k, v in self.alias_refcount.items() if v > pre_joins.get(k, 0))
         # For Oracle '' is equivalent to null. The check needs to be done
         # at this stage because join promotion can't be done at compiler
         # stage. Using DEFAULT_DB_ALIAS isn't nice, but it is the best we