I just started reading the pg_migrator source code, and I notice that
we still didn't get AlterTableCreateToastTable's API right for
pg_migrator's usage. It needs to be exposing an option to force
a particular OID for the toast table. The way pg_migrator is handling
that now is both ugly and unsafe, and it's really pretty silly when the
underlying create_toast_table() function is perfectly capable of being
told what we want it to do.
There's still time to fix this before RC1. I propose adding
"Oid toastOid" to AlterTableCreateToastTable's arguments, with
the semantics that if it's not InvalidOid then we attempt to create
the toast table with that OID.
regards, tom lane