messages to the stats collector.  This avoids the problem that enabling
stats_row_level for autovacuum has a significant overhead for short
read-only transactions, as noted by Arjen van der Meijden.  We can avoid
an extra gettimeofday call by piggybacking on the one done for WAL-logging
xact commit or abort (although that doesn't help read-only transactions,
since they don't WAL-log anything).

In my proposal for this, I noted that we could change the WAL log entries
for commit/abort to record full TimestampTz precision, instead of only
time_t as at present.  That's not done in this patch, but will be committed
separately.

to copy nodes that are known to be Vars during plan reference adjustment.
Saves useless memzero operation as well as the big switch in copyObject.

We can just palloc, instead of using makeNode, when we are going to
overwrite the whole node anyway in the FLATCOPY macro.  Also, use
FLATCOPY instead of copyObject for common node types Var and Const.

look through a freelist for a chunk of adequate size.  For a long time
now, all elements of a given freelist have been exactly the same
allocated size, so we don't need a loop.  Since the loop never iterated
more than once, you'd think this wouldn't matter much, but it makes a
noticeable savings in a simple test --- perhaps because the compiler
isn't optimizing on a mistaken assumption that the loop would repeat.
AllocSetAlloc is called often enough that saving even a couple of
instructions is worthwhile.

< * Make standard_conforming_strings the default in 8.3?
> * Make standard_conforming_strings the default in 8.4?

< 		o Add support for MOVE and SCROLL cursors
<
< 		  PL/pgSQL cursors should support the same syntax as
< 		  backend cursors.
<
> 		o -Add support for MOVE cursors
> 		o Add support for SCROLL cursors

by Pavel Stehule, and reviewed by Neil Conway.

for consistency with the backend's FETCH command. Patch from Pavel
Stehule, reviewed by Neil Conway.

types of unspecified parameters when submitted via extended query protocol.
This worked in 8.2 but I had broken it during plancache changes.  DECLARE
CURSOR is now treated almost exactly like a plain SELECT through parse
analysis, rewrite, and planning; only just before sending to the executor
do we divert it away to ProcessUtility.  This requires a special-case check
in a number of places, but practically all of them were already special-casing
SELECT INTO, so it's not too ugly.  (Maybe it would be a good idea to merge
the two by treating IntoClause as a form of utility statement?  Not going to
worry about that now, though.)  That approach doesn't work for EXPLAIN,
however, so for that I punted and used a klugy solution of running parse
analysis an extra time if under extended query protocol.

now enables row-level stats, the out of the box stats volume is no
longer particularly low.

on directory name. Fixes the generation of .sql files in contrib/spi.

Per complaint from Dave Page.

is in progress on the same hashtable.  This seems the least invasive way to
fix the recently-recognized problem that a split could cause the scan to
visit entries twice or (with much lower probability) miss them entirely.
The only field-reported problem caused by this is the "failed to re-find
shared lock object" PANIC in COMMIT PREPARED reported by Michel Dorochevsky,
which was caused by multiply visited entries.  However, it seems certain
that mdsync() is vulnerable to missing required fsync's due to missed
entries, and I am fearful that RelationCacheInitializePhase2() might be at
risk as well.  Because of that and the generalized hazard presented by this
bug, back-patch all the supported branches.

Along the way, fix pg_prepared_statement() and pg_cursor() to not assume
that the hashtables they are examining will stay static between calls.
This is risky regardless of the newly noted dynahash problem, because
hash_seq_search() has never promised to cope with deletion of table entries
other than the just-returned one.  There may be no bug here because the only
supported way to call these functions is via ExecMakeTableFunctionResult()
which will cycle them to completion before doing anything very interesting,
but it seems best to get rid of the assumption.  This affects 8.2 and HEAD
only, since those functions weren't there earlier.

completing CREATE { TEMP | TEMPORARY } TABLE, we should also suggest
VIEW and SEQUENCE. Per Greg Sabino Mullane.

table entries describing functions with periods.

we can complete "TABLE". The previous coding only looked for "CREATE TEMP".

Note that I didn't add TEMPORARY to the list of suggested completions
after we've seen "CREATE", since TEMP is equivalent and more concise. But
if the user has already manually typed TEMPORARY, we may as well
complete TABLE for them.

RESET SESSION, RESET PLANS, and RESET TEMP are now DISCARD ALL,
DISCARD PLANS, and DISCARD TEMP, respectively. This is to avoid
confusion with the pre-existing RESET variants: the DISCARD
commands are not actually similar to RESET. Patch from Marko
Kreen, with some minor editorialization.

like Slony can figure out which options were enabled in the build.

Dave Page

Dave Page

Jun Kuwamura

   <H3 id="item3.6">3.6) What is the upgrade process for
   PostgreSQL?</H3>

to reference both versioning and specific upgrade instructions.

errorcode 298 when unlocking a semaphore more than once.

Per report from Marcin Waldowski.

Per buildfarm member mastodon.

thanks Marko Kreen

> 	o -Allow commenting of variables in postgresql.conf to restore them

(it's so nice to have a buildfarm member that actively rejects naked
uses of strcasecmp).  This coding is still pretty awful, though, since
it's going to be O(N^2) in the number of guc variables.  May I direct
your attention to bsearch?

are mostly excluded by constraints: do the CE test a bit earlier to save
some adjust_appendrel_attrs() work on excluded children, and arrange to
use array indexing rather than rt_fetch() to fetch RTEs in the main body
of the planner.  The latter is something I'd wanted to do for awhile anyway,
but seeing list_nth_cell() as 35% of the runtime gets one's attention.

Joachim Wieland

are removed from the configuration file.

Joachim Wieland