calling PQsetdb ...

postmaster will release whatever it did get before dying.

(--with-maxbackends).  Add a postmaster switch (-N backends) that allows
the limit to be reduced at postmaster start time.  (You can't increase it,
sorry to say, because there are still some fixed-size arrays.)
Grab the number of semaphores indicated by min(MAXBACKENDS, -N) at
postmaster startup, so that this particular form of bogus configuration
is exposed immediately rather than under heavy load.

client connection.

symmetry with regprocout.

what is_opclause will accept.

A test case is:
create table linetab (x line);
select * from linetab where ?| x;
which coredumps in 6.4.2 and current sources.

 decade, century, or millenium.

Fix problem with date_part() for timespan (had an offset of one)
 when given decade, century, and millenium as arguments.
 Reported by Ricardo J.C.Coelho.

Change #if FALSE to #if NOT_USED to avoid port problems.
Fix up pg_indent weirdness with function argument declarations.

Fix output type for int8out, but I don't think it matters.

 modules. Used to be in dt.c I think.

 Master's Thesis.

Should merge with or complement Stefan's Master's Thesis intro to SQL.

Include specific information on the supported time zones.
 It's a really big table, so maybe it should go into an appendix instead.