Linuxeden开源社区Release 1.4.9 fixes a critical performance issue regarding the traversal of deeply nested SELECT statements. The issue may impact several areas, including the scan which occurs for a Session configured to use “bind per table”, which is the pattern used by Flask-SQLAlchemy.
Thanks to our team and users helping us to get everything done for the 1.4 series.
The complete changelog for 1.4.9 is at Changelog.
SQLAlchemy 1.4.9 is available on the Download Page.
转自 https://www.sqlalchemy.org/blog/