calling recv() and send(). This makes the calls go through the socket
emulation code on Win32, making them for example properly interruptible.

and its maximum value from 1000 to 10000.  ALTER TABLE SET STATISTICS
similarly now allows a value up to 10000.  Per discussion.

in 8.3, too, but I'm not back-patching this change since it would break any
extension modules that might be calling that function.

when they are invoked by the parser.  We had been setting up a snapshot at
plan time but really it needs to be done earlier, before parse analysis.
Per report from Dmitry Koterov.

Also fix two related problems discovered while poking at this one:
exec_bind_message called datatype input functions without establishing a
snapshot, and SET CONSTRAINTS IMMEDIATE could call trigger functions without
establishing a snapshot.

Backpatch to 8.2.  The underlying problem goes much further back, but it is
masked in 8.1 and before because we didn't attempt to invoke domain check
constraints within datatype input.  It would only be exposed if a C-language
datatype input function used the snapshot; which evidently none do, or we'd
have heard complaints sooner.  Since this code has changed a lot over time,
a back-patch is hardly risk-free, and so I'm disinclined to patch further
than absolutely necessary.

vacuuming (it's not), say "database-wide VACUUM" instead of "full-database
VACUUM" in the relevant hint messages.  Also, document the permissions needed
to do this.  Per today's discussion.

platform-specific spellings of /dev/null.  But one should be enough, so
settle on DEVNULL.

header file.  SunOS 4 is probably broken anyway, but this item stuck out as
completely weird.

to the gettext domain name, to simplify parallel installations.

Also, rename set_text_domain() to pg_bindtextdomain(), because that is what
it does.

right child if it doesn't need to.  This saves some miniscule number
of cycles, but the ulterior motive is to avoid an optimization bug
known to exist in SCO's C compiler (and perhaps others?)

composite column.  Might help cut down on future questions...

replication patch needs a signal, but we've already used SIGUSR1 and
SIGUSR2 in normal backends. This patch allows reusing SIGUSR1 for that,
and for other purposes too if the need arises.

of autovacuum_max_workers parameter is.

Per discussion with Alvaro.

where no function stats entries exist.  Partial response to Pavel's
observation that small VACUUM operations are noticeably slower in CVS HEAD
than 8.3.

with warning against setting it too high.

form a join and that case doesn't have anything to join to.  (We could
probably make it work if we didn't pull up the subquery, but it seems to
me that the case isn't worth extra code.)  Per report from Greg Stark.

SGML-escaping.

Plus some makefile cleanup.

part of a patch from Richard Evans

Robert Haas

SizeOfPageHeaderData, like PageGetContents does. Per report by Pavan
Deolasee.

appendix on key words.  catdesc was originally intended as computer-readable,
but since we ended up adding catcode, we can have more elaborate descriptions.

Pavel Stehule, with some tweaks by Peter Eisentraut

non-writable large objects need to have their snapshots registered on the
transaction resowner, not the current portal's, because it must persist until
the large object is closed (which the portal does not).  Also, ensure that the
serializable snapshot is recorded by the transaction resource owner too, even
when a subtransaction has changed the current resource owner before
serializable is taken.

Per bug reports from Pavan Deolasee.

make the code do what the comment says...

the visibility map patch that because autovacuum always sets
VacuumStmt->freeze_min_age, visibility map was never used for autovacuum,
only for manually launched vacuums. This patch introduces a new scan_all
field to VacuumStmt, indicating explicitly whether the visibility map
should be used, or the whole relation should be scanned, to advance
relfrozenxid. Anti-wraparound vacuums still need to scan all pages.

coverage output.

Kris Jurka

it's connection. This is required for applications that unload
the libpq library (such as PHP) in which case we'd otherwise
have pointers to these functions when they no longer exist.

This needs a bit more testing before we can consider a backpatch,
so not doing that yet.

In passing, remove unused functions in backend/libpq.

Bruce Momjian and Magnus Hagander, per report and analysis
by Russell Smith.

heap page, where a set bit indicates that all tuples on the page are
visible to all transactions, and the page therefore doesn't need
vacuuming. It is stored in a new relation fork.

Lazy vacuum uses the visibility map to skip pages that don't need
vacuuming. Vacuum is also responsible for setting the bits in the map.
In the future, this can hopefully be used to implement index-only-scans,
but we can't currently guarantee that the visibility map is always 100%
up-to-date.

In addition to the visibility map, there's a new PD_ALL_VISIBLE flag on
each heap page, also indicating that all tuples on the page are visible to
all transactions. It's important that this flag is kept up-to-date. It
is also used to skip visibility tests in sequential scans, which gives a
small performance gain on seqscans.

wait for the previous instead of the new file to be archived.

Based on patch by Simon Riggs.

gin_cmp_tslexeme and gin_cmp_prefix functions. Should shave off a few
cycles from GIN operations.