returns if no data is immediately available. Patch by me with numerous
fixes from Fujii Masao and Magnus Hagander.

Reported by James William Pye.

from Erik Rijkers too.

is aborted, if they were created within the failed xact.  This prevents
ExecutorEnd from being run on them, which is a good idea because they may
contain references to tables or other objects that no longer exist.
In particular this is hazardous when auto_explain is active, but it's
really rather surprising that nobody has seen an issue with this before.
I'm back-patching this to 8.4, since that's the first version that contains
auto_explain or an ExecutorEnd hook, but I wonder whether we shouldn't
back-patch further.

a separate archive entry for each BLOB, and use pg_dump's standard methods
for dealing with its ownership, ACL if any, and comment if any.  This means
that switches like --no-owner and --no-privileges do what they're supposed
to.  Preliminary testing says that performance is still reasonable even
with many blobs, though we'll have to see how that shakes out in the field.

KaiGai Kohei, revised by me

Oversight in my changes to cope with possible errors during message
processing; spotted by Joachim Wieland.

Thom Brown

Use a fatal warning check with what looks like a more portable error message. Error noticed by Tom and buildfarm member kite.

(hope I got 'em all).  Per discussion, this release will be 9.0 not 8.5.

Newly supported syntax are:
  - ALTER {TABLE|INDEX|TABLESPACE} {SET|RESET} with options
  - ALTER TABLE ALTER COLUMN {SET|RESET} with options
  - ALTER TABLE ALTER COLUMN SET STORAGE
  - CREATE INDEX CONCURRENTLY
  - CREATE INDEX ON (without name)
  - CREATE INDEX ... USING with pg_am.amname instead of hard-corded names
  - CREATE TRIGGER with events
  - DROP AGGREGATE function with arguments

all the values derived from oldestXid, not just that field.  Brain fade in
one of my patches associated with flat file removal, exposed by a report
from Fujii Masao.

With this change, xidVacLimit should always be valid, so remove a couple of
bits of complexity associated with the previous assumption that sometimes
it wouldn't get set right away.

NAMEDATALEN, so this code doesn't go nuts with smaller than default
BLCKSZ or larger than default NAMEDATALEN.  The standard value is
still exactly 8000.

In addition, add support for a "payload" string to be passed along with
each notify event.

This implementation should be significantly more efficient than the old one,
and is also more compatible with Hot Standby usage.  There is not yet any
facility for HS slaves to receive notifications generated on the master,
although such a thing is possible in future.

Joachim Wieland, reviewed by Jeff Davis; also hacked on by me.

Still to be done: fix docs and fix regression failures under auto_explain.

Prevent use of another buggy version of Safe.pm.
Only register the exit handler if we have  successfully created an interpreter.
Change log level of perl warnings from NOTICE to WARNING.

The infrastructure is there if in future we decide to allow
DBAs to specify extra modules that will be allowed in trusted code.
However, for now the relevant variables are declared as lexicals
rather than as package variables, so that they are not (or should not be)
accessible.

Mostly code from Tim Bunce, reviewed by Alex Hunsaker, with some
tweaks by me.

document the behavior of terse and verbose output options.

honored by YYYY.  Also document Oracle "toggle" FM behavior.

Per report from Guy Rouillier

versions match, per report from Peter.

is invisible in psql, other interfaces, like libpq, make this value
visible.

Boszormenyi Zoltan

existing *.pl conversion script.

Andreas 'ads' Scherbaum

and use this in pq_getbyte_if_available.

It's only a limited implementation which swithes the whole emulation layer
no non-blocking mode, but that's enough as long as non-blocking is only
used during a short period of time, and only one socket is accessed during
this time.

By Zoltán Böszörményi

and move the context information into errcontext instead of errmsg.
This makes them better conform to our guidelines.

Also remove a few errcode declarations that were providing the default
value ERRCODE_INTERNAL_ERROR.

Jan Urbanski

until we can work out portability issues the build farm uncovered.

In passing avoid fsyncing subdirectories twice.

Also adjust documentation of DO.

Patch from David Fetter and subsequent discussion.

Display explain buffers measurements in memory units rather than blocks. Also show "Total Buffer Usage" to hint that these are totals not averages per loop

all the data and using posix_fadvise to nudge the OS into flushing it
earlier. This also hopefully makes CREATE DATABASE avoid spamming the
cache.

Tests show a big speedup on Linux at least on some filesystems.

Idea and patch from Andres Freund.

The purpose of this change is to eliminate the need for every caller
of SearchSysCache, SearchSysCacheCopy, SearchSysCacheExists,
GetSysCacheOid, and SearchSysCacheList to know the maximum number
of allowable keys for a syscache entry (currently 4).  This will
make it far easier to increase the maximum number of keys in a
future release should we choose to do so, and it makes the code
shorter, too.

Design and review by Tom Lane.

directory and not just the individual files.

Back-patch to 8.1 -- before that we just called "cp -r" and never
fsynced anything anyways.