On Mon, Nov 26, 2018 at 11:20 PM Andrew Gierth <and...@tao11.riddles.org.uk> wrote: > But the combination of inlining and polymorphism, in particular, makes > it impossible for the function author to know this. Take the OP's > example; it is parallel safe if and only if the selected type's equal > function is parallel safe - how is the author supposed to know? What if > the type is one installed later?
I think you have to set it conservatively. It's easy to construct all kinds of cases where a function is sometimes parallel-safe and sometimes not depending on the parameters passed to it, but we don't have any way to indicate that right now -- and I'm not entirely convinced that we need one. -- Robert Haas EnterpriseDB: http://www.enterprisedb.com The Enterprise PostgreSQL Company
