> The point is the query plan will most probably look totally different. Different to what? > PostgreSQL choose a complete different joining strategy. This c

> The point is the query plan will most probably look totally different. Different to what? > PostgreSQL choose a complete different joining strategy. This can also happen when combining such a condition with another btree index lookup. It doesn‘t have to be a fault of PostgreSQL Yes agree with all that is possible. EXPLAIN will tell us!