Re: [bug] Table not have typarray when created by single user mode

I think a safer fix is to replace the IsUnderPostmaster check in
heap_create_with_catalog with !IsBootstrapProcessingMode() or the
like.  That would have the result that we'd create array types for
the information_schema views, as well as the system views made in
system_views.sql, which is slightly annoying but probably no real
harm in the big scheme of things.  (I wonder if we ought to reverse
the sense of the adjacent relkind check, turning it into a blacklist,
while at it.)

I remain however of the opinion that doing this sort of thing in
single-user mode, or really much of anything beyond emergency
vacuuming, is unwise.