Web Reference: On MySQL, QuerySet.update() may execute a SELECT followed by an UPDATE instead of a single UPDATE when filtering on related tables, which can introduce a race condition if concurrent changes occur between the queries. Jun 18, 2013 · As the Django Documentation says, select_for_update returns a Queryset. But get does not. Now I have a query which I am sure is going to return only one tuple. But I also need to acquire locks for ... Nov 19, 2018 · Django’s select_for_update statement is completely ignored by SQLite. In this example I’m using PostgreSQL. Locks in PostgreSQL are granted to a database connection. So in order to test...
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