use test; drop table if exists table_6; create table table_6( a int not null, b int not null, c int, primary key(a, b) ); -- This test data specifically designed to be ambiguous unless the -- ascending-index WHERE clause is carefully wrapped in parens. If the archiver -- goes to 2 rows and doesn't wrap right, it will archive the 3rd row which it -- should not because it archives c=1. insert into table_6(a, b, c) values(1, 1, 1), (1, 2, 1), (1, 3, 0);