as either HEAP_XMAX_COMMITTED or HEAP_XMAX_INVALID once the updating
transaction is gone.  Otherwise some other transaction may come along
and try to test the commit status of t_xmax later --- which could be
after VACUUM has recycled the CLOG status for that xact.  Bug introduced
in post-beta4 bug fix.

FrozenTransactionId, not the XID of the creating transaction.  Without
this it's possible for a reference to a long-gone CLOG record to occur,
per Christian Meunier's bug report of 10-Jan-02.  Worse, the sequence
tuple would become invisible to SELECTs after 2 billion transactions.

Since the fix is applied during sequence creation it does not help
existing databases, unless you drop and recreate every sequence.
However, we intend to force initdb for 7.2RC1 anyway, to fix a pg_proc
error, so I see no need to do more for this problem.

improvments.

anymore.

footnote count.

setting.

pgsql-hackers discussion of this date.

the difference between a run-time type cast and casting a literal string
to a specific type.  Minor editorial work in same area.

Oliver Elphick.  A few other minor cleanups while at it.

And listing QNX 6 as both supported and unsupported is probably not helpful.