rather than an integer, and fix the associated fallout. From Alvaro
Herrera.

EXPLAIN ANALYZE instrumentation.  Magnus Hagander

to write out data that we are about to tell the filesystem to drop.
smgr_internal_unlink already had a DropRelFileNodeBuffers call to
get rid of dead buffers without a write after it's no longer possible
to roll back the deleting transaction.  Adding a similar call in
smgrtruncate simplifies callers and makes the overall division of
labor clearer.  This patch removes the former behavior that VACUUM
would write all dirty buffers of a relation unconditionally.

snprintf is called before the memory system is started.  We have to just
malloc/free.  There are no elogs in the code so we should be fine.

the server-side port library.  Somehow I missed that change when I added
memory allocation to snprintf.c.

> * -Allow the size of the buffer cache used by temporary objects to be

of the local buffer arena for temporary table access.

find already-allocated local buffers.  This is the last obstacle
in the way of setting NLocBuffer to something reasonably large.

it's supposed to when --file option is used.

before we attempt any file deletions in ShutdownPostgres.  Per Tatsuo.

Added patch by Christof Petig <christof@petig-baender.de> to work around gcc bug on powerpc and amd64.

a pin on the victim buffer.

backend exit.  Per report from Bruce.

is still alive.  This improves our odds of not getting fooled by an
unrelated process when checking a stale lock file.  Other checks already
in place, plus one newly added in checkDataDir(), ensure that we cannot
attempt to usurp the place of a postmaster belonging to a different userid,
so there is no need to error out.  Add comments indicating the importance
of these other checks.

grouping_planner() to preprocess_targetlist(), according to a comment
in grouping_planner(). I think the refactoring makes sense, and moves
some extraneous details out of grouping_planner().

Robert Treat

Tino Wildenhain

<   SQL-spec compliant, so allow such handling to be disabled.
>   SQL-spec compliant, so allow such handling to be disabled.  However,
>   disabling backslashes could break many third-party applications and tools.

the locale docs. Patch from Chris KL, editorialization by Neil Conway.

and rules alphabetically in the output.  This makes it the same as
for indexes and stops the irritating random or reverse ordering it
currently has.

Chris KL

of tuples when passing data up through multiple plan nodes.  A slot can now
hold either a normal "physical" HeapTuple, or a "virtual" tuple consisting
of Datum/isnull arrays.  Upper plan levels can usually just copy the Datum
arrays, avoiding heap_formtuple() and possible subsequent nocachegetattr()
calls to extract the data again.  This work extends Atsushi Ogawa's earlier
patch, which provided the key idea of adding Datum arrays to TupleTableSlots.
(I believe however that something like this was foreseen way back in Berkeley
days --- see the old comment on ExecProject.)  A test case involving many
levels of join of fairly wide tables (about 80 columns altogether) showed
about 3x overall speedup, though simple queries will probably not be
helped very much.

I have also duplicated some code in heaptuple.c in order to provide versions
of heap_formtuple and friends that use "bool" arrays to indicate null
attributes, instead of the old convention of "char" arrays containing either
'n' or ' '.  This provides a better match to the convention used by
ExecEvalExpr.  While I have not made a concerted effort to get rid of uses
of the old routines, I think they should be deprecated and eventually removed.

Add support for snprintf '+', 'h', and %* length settings.

Andrew Dunstan

arguments.

Nicolai Tufar

Per Neil.

locale is C.

Backpatch to 8.0.X because some operating systems were throwing errors
for such operations, rather than ignoring the locale when it was C.

should hopefully unbreak the Win32 build. Apologies for breaking it in
the first place.

> * Allow sequential scans to take advantage of other concurrent
>   sequentiqal scans, also called "Synchronised Scanning"