== WöchentlicherPostgreSQL Newsletter - 02.August 2009

Der Originalartikel befindet sich unter:
http://www.postgresql.org/community/weeklynews/pwn20090802


== Wöchentlicher PostgreSQL Newsletter - 02. August 2009 ==

FOSDEM 2010 wird am 6./7. Februar 2010 in Brüssel stattfinden.
http://www.fosdem.org/

Das erste Meeting der Silicon Valley PUG war letzte Woche. Trete ihrem
Meetup bei, um über zukünftige Meetings informiert zu werden.
http://www.meetup.com/svpgsql/

OpenSQL Camp in Portland sucht Sponsoren. Bereite deine Reisepläne
jetzt vor! :)
http://www.chesnok.com/daily/2009/07/29/opensql-camp-comes-t o-portland-nove=
mber-14-15-2009/

Christophe Pettus hat das Video veröffentlicht, welches er auf dem
PGDay San Jose aufgenommen hat.
http://media.postgresql.org/pgday-sjc-09/

== PostgreSQL Produkt Neuigkeiten ==

DBD::Pg 2.14.1, ein Perl Konnector für PostgreSQL, ist erschienen.
http://search.cpan.org/dist/DBD-Pg/

PostgreSQL + Replication 8.3-1.8, vorher bekannt als Mammoth
Replicator, ist erschienen.
https://projects.commandprompt.com/public/replicator/wiki/ge tting_replicator

== PostgreSQL Jobs im August ==

http://archives.postgresql.org/pgsql-jobs/2009-08/threads.ph p

== PostgreSQL Lokal ==

Das OpenSQL Camp findet am 22. und 23. August in St. Augustin,
Deutschland, in der Nähe von Bonn und Köln, statt. Einsendeschlu=
ß für
den CfP ist der 19. Juli 2009. Vorträge einreichen!
http://opensqlcamp.org/Events/2009/Call_for_Participation

Die Deutsche PostgreSQL Usergruppe wird einen Dev-Room auf der
FrOSCon am Sonntag, dem 23. August 2009 haben. Der Call for Papers
ist eröffnet:
http://andreas.scherbaum.la/blog/archives/573-Call-for-Paper s-fuer-den-Post=
greSQL-Devroom-auf-der-FrOSCon-2009.html

The CfP for PyCon Argentina is open until June 29th, 2009 23:59 ART.
The conference itself will be in Beunos Aires on September 4-5 2009.
http://ar.pycon.org/2009/rfp/

Andreas (ads) Scherbaum wird einen Kurs "PostgreSQL im
Unternehmenseinsatz" an der Volkshochschule Magdeburg, Deutschland,
vom 7. bis zum 11. Septemper 2009 geben. Details unter:
http://andreas.scherbaum.la/blog/archives/574-PostgreSQL-als -Bildungsurlaub=
..html

Es findet eine Konferenz in Athens, Georgia, USA am 19. September
2009 statt. Der CfP ist eröffnet.
http://www.postgresqlconference.org/2009/pgday/athens

Es findet eine Konferenz in Seattle, Washington, USA am 16.-18.
Oktober 2009 statt. Der CfP ist eröffnet.
http://www.postgresqlconference.org/2009/west

PGCon Brasilien wird am 23.-24. Oktober 2009 auf dem Unicamp in
Campinas, Sao Paulo, stattfinden. Der CfP ist eröffnet!
http://pgcon.postgresql.org.br/2009/chamadas.en.php

PGDay.EU 2009 wird an der Telecom ParisTech Universität in Paris,
Frankreich, am 6. und 7. Nivember 2009 stattfinden. Der CfP ist
eröffnet. Vorträge einreichen!
http://www.pgday.eu/

Die 10. jährliche JPUG Konferenz hat den Aufruf für Vorträge=
gestartet.
Die Konferenz findet am 20-21. November 2009 in Tokio, Japan, statt.
http://archives.postgresql.org/pgsql-announce/2009-05/msg000 18.php

== PostgreSQL in den News ==

Planet PostgreSQL: http://planet.postgresql.org/

Dieser wöchentliche PostgreSQL Newsletter wurde erstellt von David
Fetter und Josh Berkus.

Sende Neuigkeiten und Ankündigungen bis Sonntag, 15 Uhr Pazifischer
Zeit. Bitte sende englische Beiträge an david@fetter.org, deutsche an
pwn@pgug.de, italienische an pwn@itpug.org.

== Angewandte Patches ==

Magnus Hagander committed:

- In pgsql/src/tools/msvc/Project.pm, enable the use of multiple
CPUs/cores when building on MSVC. This only affects the C compiler
step - we still only build one target at a time.

- In pgsql/src/port/exec.c, fix minor memory leak in Win32 SID
handling functions. Not a big issue since it's only called during
process startup, thus no backpatch. Found by TAKATSUKA Haruka,
patch by Magnus Hagander and Andrew Chernow.

- In pgsql/contrib/pgbench/pgbench.c, make sure FD_SETSIZE is set
before we include any Windows header files. Josh Williams.

Tom Lane committed:

- Add system catalog columns pg_constraint.conindid and
pg_trigger.tgconstrindid. conindid is the index supporting a
constraint. We can use this not only for unique/primary-key
constraints, but also foreign-key constraints, which depend on the
unique index that constrains the referenced columns. tgconstrindid
is just copied from the constraint's conindid field, or is zero for
triggers not associated with constraints. This is mainly intended
as infrastructure for upcoming patches, but it has some virtue in
itself, since it exposes a relationship that you formerly had to
grovel in pg_depend to determine. I simplified one
information_schema view accordingly. (There is a pg_dump query that
could also use conindid, but I left it alone because it wasn't clear
it'd get any faster.)

- In pgsql/src/backend/storage/ipc/procarray.c, fix a thinko
introduced into CountActiveBackends by a recent patch: we should
ignore NULL array entries, not non-NULL ones. This had the effect
of disabling commit_delay, and could have caused a crash in the rare
race condition the patch was intended to fix. Bug report and
diagnosis by Jeff Janes, in bug #4952.

- Support deferrable uniqueness constraints. The current
implementation fires an AFTER ROW trigger for each tuple that looks
like it might be non-unique according to the index contents at the
time of insertion. This works well as long as there aren't many
conflicts, but won't scale to massive unique-key reassignments.
Improving that case is a TODO item. Dean Rasheed.

- In pgsql/src/backend/utils/adt/date.c, fix time_part and timetz_part
(ie, EXTRACT() for those datatypes) to include a fractional part in
the output for MILLISECOND and SECOND cases, rather than truncating
the source value. This is what the float-timestamp code has always
done, and it was clearly the code author's intent to do the same for
integer timestamps, but he forgot about integer division in C. The
other datatypes supported by EXTRACT() already do this correctly.
Backpatch to 8.4, so that the default (integer) behavior of that
branch will match the default (float) behavior of older branches.
Arguably we should patch further back, but it's possible that
applications are expecting the broken behavior in older branches.
8.4 is new enough that expectations shouldn't be too settled. Per
report from Greg Stark.

- Merge the Constraint and FkConstraint node types into a single type.
This was foreseen to be a good idea long ago, but nobody had got
round to doing it. The recent patch for deferred unique constraints
made transformConstraintAttrs() ugly enough that I decided it was
time. This change will also greatly simplify parsing of deferred
CHECK constraints, if anyone ever gets around to implementing that.
While at it, add a location field to Constraint, and use that to
provide an error cursor for some of the constraint-related error
messages.

- Create a multiplexing structure for signals to Postgres child
processes. This patch gets us out from under the Unix limitation of
two user-defined signal types. We already had done something
similar for signals directed to the postmaster process; this adds
multiplexing for signals directed to backends and auxiliary
processes (so long as they're connected to shared memory). As proof
of concept, replace the former usage of SIGUSR1 and SIGUSR2 for
backends with use of the multiplexing mechanism. There are still
some hard-wired definitions of SIGUSR1 and SIGUSR2 for other process
types, but getting rid of those doesn't seem interesting at the
moment. Fujii Masao.

- Improve unique-constraint-violation error messages to include the
exact values being complained of. In passing, also remove the
arbitrary length limitation in the similar error detail message for
foreign key violations. Itagaki Takahiro.

- Department of second thoughts: let's show the exact key during
unique index build failures, too. Refactor a bit more since that
error message isn't spelled the same.

- Add ALTER TABLE ... ALTER COLUMN ... SET STATISTICS DISTINCT.
Robert Haas

Teodor Sigaev committed:

- In pgsql/src/backend/utils/adt/tsquery_rewrite.c, fix incorrect
cleanup of tsquery in ts_rewrite(). Per bug #4933 by Aaron
Marcuse-Kubitza.

- Correct calculations of overlap and contains operations over
polygons.

== Abgelehnte Patches (bis jetzt) ==

Fernando Ike de Oliveira's patch to list languages. Not updated in
time, returned with feedback.

Tsutomu Yamada's patch to support 64-bit platforms more portably.
Incomplete, returned with feedback.

Dickson S. Guedes's patch to display client and server versions in
psql prompt. Not updated in time, returned with feedback.

== Eingesandte Patches ==

Teodor Sigaev sent in two patches to split up Oleg Bartunov's patch
for filtering dictionaries and unaccent in textsearch.

Josh Williams sent in a fix to the multi-threaded pgbench patch.

Sergey V. Karpov submitted two versions and Robert Haas and Tom Lane
reworked another revision of the patch to improve dict_xsyn.

Robert Haas sent in another revision of his machine-readable explain
output patch.

Steve Prentice sent in two revisions of a patch to make PL/pgsql's
input parameters writeable.

Zoltan Boszormenyi sent in a patch adding a lock_timeout GUC which
sets how long SELECT ... FOR UPDATE will wait. This defaults to 0,
meaning "wait forever if needed."

Bernd Helmle sent in a revised patch for mixed named notation in
PL/pgsql.

Tom Lane sent in an improvement to Kevin Grittner's patch to
revise parallel pg_restore's scheduling heuristic by getting rid of
the find_ready_items() scans, thus avoiding O(n^2) behavior.

Dimitri Fontaine sent in an updated version of the ALTER TABLE...ALTER
COLUMN...SET DISTINCT patch.

Marko (johto) Tiikkaja sent in another WIP patch to allow write
operations inside CTEs.

Mark Kirkwood sent in an updated patch to show lock wait statistics.

Joe Conway sent in an updated version of Abhijit Menon-Sen's patch to
implement has_sequence_privilege().

Jeff Davis sent in a rework of Oleg Bartunov's patch to support prefix
in synonym dictionaries.

--=20
Andreas 'ads' Scherbaum
Deutsche PostgreSQL User Group: http://www.pgug.de
DPWN: http://andreas.scherbaum.la/blog/categories/18-PWN

--=20
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