and change auto_explain's custom GUC variables to be named auto_explain.xxx
not just explain.xxx.  Per discussion in connection with the
pg_stat_statements patch, it seems like a good idea to have the convention
that custom variable classes are named the same as their defining module.
Committing separately since this should happen regardless of what happens
with pg_stat_statements itself.

copyright too.

is available during datatype input in Bind message processing.  I put the
PopActiveSnapshot() or equivalent just before PortalDefineQuery, which is
an unsafe spot for it (in 8.3 and later) because we are carrying a plancache
refcount that hasn't yet been assigned to the portal.  Any error thrown there
would result in leaking the refcount.  It's not exactly likely that
PopActiveSnapshot would throw an elog, perhaps, but it could happen.
Reorder the code and add another comment warning not to do that.

frame clause, as appears to be required by the fine print in the SQL spec.
Per discussion with Pavel, not doing so risks user confusion.

report if the command is attempted against an old server.

various display commands, not only for \z.

In passing, fix some infelicities in the newly added \d commands for SQL-MED
catalogs.

Andreas Scherbaum and Tom Lane

so that user-defined window functions are possible.  For the moment you'll
have to write them in C, for lack of any interface to the WindowObject API
in the available PLs, but it's better than no support at all.

There was some debate about the best syntax for this.  I ended up choosing
the "it's an attribute" position --- the other approach will inevitably be
more work, and the likely market for user-defined window functions is
probably too small to justify it.

patch.  This includes the ability to force the frame to cover the whole
partition, and the ability to make the frame end exactly on the current row
rather than its last ORDER BY peer.  Supporting any more of the full SQL
frame-clause syntax will require nontrivial hacking on the window aggregate
code, so it'll have to wait for 8.5 or beyond.

on buildfarm member bear.  Sync the test order in serial_schedule with that
in parallel_schedule.

Simon Riggs.

field needs to be included in equalRuleLocks() comparisons, else updates
will fail to propagate into relcache entries when they have positive
reference count (ie someone is using the relcache entry).
Per report from Alex Hunsaker.

per Hitoshi Harada.

results due to underspecified ordering.  Per report from buildfarm member
pika.

Hitoshi Harada, with some kibitzing from Heikki and Tom.

upcoming window-functions patch.  First, tuplestore_trim is now an
exported function that must be explicitly invoked by callers at
appropriate times, rather than something that tuplestore tries to do
behind the scenes.  Second, a read pointer that is marked as allowing
backward scan no longer prevents truncation.  This means that a read pointer
marked as having BACKWARD but not REWIND capability can only safely read
backwards as far as the oldest other read pointer.  (The expected use pattern
for this involves having another read pointer that serves as the truncation
fencepost.)

dead code since Postgres95.

	TRACE_POSTGRESQL_WAL_BUFFER_WRITE_DIRTY

Robert Lor

Should fix recent buildfarm breakage.

etc.  I think this will fix the current buildfarm issues ...

because transformGenericOptions returns an array, not an Oid. I'm not
sure if this fixes the crashes seen in buildfarm, but it should be fixed
anyway.

useful yet, but I'm tired of re-merging this aspect of the window functions
patch.

This doesn't do any remote or external things yet, but it gives modules
like plproxy and dblink a standardized and future-proof system for
managing their connection information.

Martin Pihlak and Peter Eisentraut

reloptions patch for autovacuum and revised by me.

Note that there doesn't seem to be a way to display an index's reloptions.

explicit cast to show the intended array type, we forgot to teach ruleutils.c
to print out such constructs properly.  Found by noting bogus output from
recent changes in polymorphism regression test.

recent gripe that the info is hard to find.

materialize-mode set results.  Since it now uses the ReturnSetInfo node
to hold internal state, we need to be sure to set up the node even when
the immediately called function doesn't return set (but does have a set-valued
argument).  Per report from Anupama Aherrao.

per recent discussions.  In passing this also fixes a couple of bugs in
the previous variadic-parameters patch.

various facilities.

surprised/confused some users.

fix segfault on non-glibc systems.