On 18/08/2018 23:05, Tom Lane wrote:
> Possibly we need to be more careful than we are now about whether
> there's padding at the end of the fixed-size fields ... but just
> ripping out the code that attempts to deal with that is hardly
> an improvement.
I don't think the tuple packing issue has to do with the tuple
descriptor code. The tuple descriptors already use allocations of size
sizeof(FormData_pg_attribute) (CreateTemplateTupleDesc), just the memcpy
and memset calls use (potentially) less. That might have saved a few
bytes for omitting the varlena fields, but I don't think it affects
alignment correctness. If we, say, added a trailing char field now, the
only thing this code
--
Peter Eisentraut http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
