New submission from Erlend Egeberg Aasland <erlend.aasl...@innova.no>:
If no rows match an aggregate query, _pysqlite_step_callback() is never called, and _pysqlite_final_callback() is called once. In order to prevent needless context allocation, we should pass 0 as the second argument to sqlite3_aggregate_context(). Quoting from https://sqlite.org/c3ref/aggregate_context.html: Within the xFinal callback, it is customary to set N=0 in calls to sqlite3_aggregate_context(C,N) so that no pointless memory allocations occur. ---------- components: Library (Lib) messages: 387272 nosy: berker.peksag, erlendaasland, serhiy.storchaka priority: normal severity: normal status: open title: Prevent needless allocation of sqlite3 aggregate function context versions: Python 3.10 _______________________________________ Python tracker <rep...@bugs.python.org> <https://bugs.python.org/issue43258> _______________________________________ _______________________________________________ Python-bugs-list mailing list Unsubscribe: https://mail.python.org/mailman/options/python-bugs-list/archive%40mail-archive.com
