sqlalchemy cursor error during yield_per

Question

I am getting the following error:

Traceback (most recent call last):
    main()
    for item in session.query(Item).yield_per(10):
    fetch = cursor.fetchma         


        

Answer 1

Another option would be to use the cursor option "WITH HOLD", when it gets into an sqlalchemy release: https://bitbucket.org/zzzeek/sqlalchemy/issues/3667/support-postgresqls-with-hold-cursor

Note the caveat Scott mentions about Postgres materializing cursors on first commit.