polygon operators (<<, &<, >>, &>).  Per ideas originally put forward
by andrew@supernews and later rediscovered by moi.  This patch just
fixes the existing opclasses, and does not add any new behavior as I
proposed earlier; that can be sorted out later.  In principle this
could be back-patched, since it changes only search behavior and not
system catalog entries nor rtree index contents.  I'm not currently
planning to do that, though, since I think it could use more testing.

< * Allow administrators to safely terminate individual sessions
<
<   Right now, SIGTERM will terminate a session, but it is treated as
<   though the postmaster has paniced and shared memory might not be
<   cleaned up properly.  A new signal is needed for safe termination
<   because backends must first do a query cancel, then exit once they
<   have run the query cancel cleanup routine.
<
> * Allow administrators to safely terminate individual sessions either
>   via an SQL function or SIGTERM

logical place for it since it is of no use to users.  Per recent
discussions on cleaning up contrib.

a physically separate type.  Defining 'lo' as a domain over OID works
just fine and is more efficient.  Improve documentation and fix up the
test script.  (Would like to turn test script into a proper regression
test, but right now its output is not constant because of numeric OIDs;
plus it makes Unix-specific assumptions about files it can import.)

(There are more that will be removed once they've been copied to
pgfoundry.org.)

in the database.  The old behavior (reindex system catalogs only) is now
available as REINDEX SYSTEM.  I did not add the complementary REINDEX USER
case since there did not seem to be consensus for this, but it would be
trivial to add later.  Per recent discussions.

of columns of a query result so that it can "see through" cursors and
prepared statements.  Per gripe a couple months back from John DeSoi.

argument list contains parameter symbols ($n) declared as type VOID,
discard these arguments.  This allows the driver to avoid renumbering
mixed IN and OUT argument placeholders (the JDBC syntax involves writing
? for both IN and OUT parameters, but on the server side we don't think
that OUT parameters are arguments).  This doesn't break any currently-
useful cases since VOID is not used as an input argument type.

we need to be careful to reset rc to PLPGSQL_RC_OK, depending on how
the loop's logic is structured. If we continue a loop but it then
exits without executing the loop's body again, we want to return
PLPGSQL_RC_OK to our caller.  Enhance the regression tests to catch
this problem. Per report from Michael Fuhr.

(1) The code doesn't initialize `sum', so the initial "does the checksum
    match?" test is wrong.

(2) The loop that is intended to check for a "null block" just checks
    the first byte of the tar block 512 times, rather than each of the
    512 bytes one time (!), which I'm guessing was the intent.

It was only through sheer luck that this worked in the first place.

Per Coverity static analysis performed by EnterpriseDB.

is redundant after a check has already been made for "num < 0". The "set"
variable can also be removed, as it is now no longer used. Per checking
with Karel, this is the right fix.

Per Coverity static analysis performed by EnterpriseDB.

next iteration of a loop. Update documentation and add regression tests.
Patch from Pavel Stehule, reviewed by Neil Conway.

using the recently added lo_create() function.  The restore logic in
pg_restore is greatly simplified as well, since there's no need anymore
to try to adjust database references to match a new set of blob OIDs.

Dave Page.  Also, cause it to emit rather than ignore any ACL and
datconfig options that may be set for these two databases.

unlike template0 and template1 does not have any special status in
terms of backend functionality.  However, all external utilities such
as createuser and createdb now connect to "postgres" instead of
template1, and the documentation is changed to encourage people to use
"postgres" instead of template1 as a play area.  This should fix some
longstanding gotchas involving unexpected propagation of database
objects by createdb (when you used template1 without understanding
the implications), as well as ameliorating the problem that CREATE
DATABASE is unhappy if anyone else is connected to template1.
Patch by Dave Page, minor editing by Tom Lane.  All per recent
pghackers discussions.

malformed ident map file.  This was introduced by the linked list
rewrite in 8.0 -- mea maxima culpa.

Per Coverity static analysis performed by EnterpriseDB.

only used in one branch of an if statement, so we can move its
declaration to that block. This also avoids an unnecessary syscache
lookup.

Per Coverity static analysis performed by EnterpriseDB.

NULL (e.g. due to the preceding strlen()). Therefore we needn't recheck
this before initializing 'e_text'.

Per Coverity static analysis performed by EnterpriseDB.

(due to the preceding strlen(), for example), so we needn't recheck this
before invoking pg_mbcliplen().

Per Coverity static analysis performed by EnterpriseDB.

It never leaked memory before PG 8.0, so none of the callers are
expecting this.  Cleanest fix seems to be to make it allocate the needed
memory in estate->eval_econtext, where it will be cleaned up by
the next exec_eval_cleanup.  Per report from Bill Rugolsky.

*fail*, to test that plpython didn't allow untrusted operations.
When we changed plpython to plpythonu because python didn't actually have
a secure sandbox mode, someone (probably me :-() misinterpreted the tests
as checking whether Python's file I/O works.  Which is a stupid thing for
us to be testing.  Remove it so we don't clutter the filesystem with
random temporary files.

copying/converting the new value, which meant that it failed badly on
"var := var" if var is of pass-by-reference type.  Fix this and a similar
hazard in exec_move_row(); not sure that the latter can manifest before
8.0, but patch it all the way back anyway.  Per report from Dave Chapeskie.

(a/k/a SELECT INTO).  Instead, flush and fsync the whole relation before
committing.  We do still need the WAL log when PITR is active, however.
Simon Riggs and Tom Lane.

2. improve vacuum for gist
   - use FSM
   - full vacuum:
      - reforms parent tuple if it's needed
        ( tuples was deleted on child page or parent tuple remains invalid
          after crash recovery )
      - truncate index file if possible
3. fixes bugs and mistakes

'register' qualifier, make some function declarations more consistent,
and so on.

buildfarm machines.

investigate buildfarm failures.

scankeys arrays that it needs can never have more than INDEX_MAX_KEYS
entries, so it's reasonable to just allocate them as fixed-size local
arrays, and save the cost of palloc/pfree.  Not a huge savings, but
a cycle saved is a cycle earned ...

includes error checking and an appropriate ereport(ERROR) message.
This gets rid of rather tedious and error-prone manipulation of errno,
as well as a Windows-specific bug workaround, at more than a dozen
call sites.  After an idea in a recent patch by Heikki Linnakangas.

given reasonably short lifespans for prepared transactions, this should
mean that only a small minority of state files ever need to be fsynced
at all.  Per discussion with Heikki Linnakangas.