== Wöchentlicher PostgreSQL Newsletter - 03. April 2011 ==

Der Originalartikel befindet sich unter:

http://www.postgresql.org/community/weeklynews/pwn20110403



== Wöchentlicher PostgreSQL Newsletter - 03. April 2011 ==

PostgreSQL 9.1alpha5 erschienen, mit einer Menge Verbesserungen!
Dies ist die letzte geplante Alpha für 9.1. Du kannst sie
hier bekommen:
http://www.postgresql.org/developer/alpha

Die Türkische PostgreSQL User Group organisiert eine eintägige
Veranstaltung am 30. April 2011. Folge @PgDayTR für Details,
auf Türkisch.

== PostgreSQL Produkt Neuigkeiten ==

DBD::Pg 2.18.0, ein Perl Treiber für
PostgreSQL, ist erschienen.
http://search.cpan.org/dist/DBD-Pg/

== PostgreSQL Lokal ==

Es wird eine umfangreiche PostgreSQL Präsenz auf der MySQL Konferenz
und Expo am am 11-14. April 2011 in Santa Clara, Kalifornien, geben.
http://en.oreilly.com/mysql2011/public/schedule/tag/postgres ql

Das Open Database Camp findet vom 7. bis 9. Mai 2011 in Sardinien,
Italien statt.
http://datacharmer.blogspot.com/2011/01/announcing-open-data base-camp-sardi=
nia.html

PGCon findet am 19. und 20. Mai 2011 an der Universität
von Ottawa statt, vorher gibt es am 17. und 18. Mai
zwei Tage mit Trainings.
http://www.pgcon.org/2011/

Das Open Database Camp findet vom 7. bis 9. Mai 2011 in Sardinien,
Italien statt.
http://www.postgresql-sessions.org/en/2/

pgbr findet in Sao Paulo, Brazilien, am 3. und 4. November 2011 statt.
http://pgbr.postgresql.org.br/

== PostgreSQL in den News ==

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

Dieser wöchentliche PostgreSQL Newsletter wurde erstellt von David Fet=
ter.

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, spanische an pwn@arpug.com.ar.

== Reviews ==

== Angewandte Patches ==

Tom Lane pushed:

- Get rid of links that don't work when building HISTORY.
=20
http://git.postgresql.org/pg/commitdiff/a720c28f0af3185f7d40 788a78867a36bff=
36bc7

- Prevent a rowtype from being included in itself. Eventually we
might be able to allow that, but it's not clear how many places need
to be fixed to prevent infinite recursion when there's a direct or
indirect inclusion of a rowtype in itself. One such place is
CheckAttributeType(), which will recurse to stack overflow in cases
such as those exhibited in bug #5950 from Alex Perepelica. If we
were sure it was the only such place, we could easily modify the
code added by this patch to stop the recursion without a complaint
... but it probably isn't the only such place. Hence, throw error
until such time as someone is excited enough about this type of
usage to put work into making it safe. Back-patch as far as 8.3.
8.2 doesn't have the recursive call in CheckAttributeType in the
first place, so I see no need to add code there in the absence of
clear evidence of a problem elsewhere.
=20
http://git.postgresql.org/pg/commitdiff/eb51af71f241e8cb1997 90dee9ad246bb36=
b3287

- Fix typo in PQconnectStartParams(). This would lead to leaking the
PGconn structure after an error detected by conninfo_array_parse(),
as well as failing to return a useful error message in such cases.
Backpatch to 9.0 where the error was introduced. Joseph Adams
=20
http://git.postgresql.org/pg/commitdiff/d518d6a168797c2e3b9c f03a3b5cfa335be=
735bb

Alvaro Herrera pushed:

- Add missing #include
=20
http://git.postgresql.org/pg/commitdiff/e5948e3504c72fb2b8b3 2af26bfbb016e7c=
71bf6

Robert Haas pushed:

- Mark up release notes using . Unlike , this actually
works.
=20
http://git.postgresql.org/pg/commitdiff/7c7fd882a5275bf40cd5 ac72c6118916f78=
02aa4

- Fix compiler warning.
=20
http://git.postgresql.org/pg/commitdiff/7fcc75dd26ff0fee0b02 f1b8b4215c298ca=
974ca

- Support comments on FOREIGN DATA WRAPPER and SERVER objects. This
mostly involves making it work with the objectaddress.c framework,
which does most of the heavy lifting. In that vein, change
GetForeignDataWrapperOidByName to get_foreign_data_wrapper_oid and
GetForeignServerOidByName to get_foreign_server_oid, to match the
pattern we use for other object types. Robert Haas and Shigeru
Hanada
=20
http://git.postgresql.org/pg/commitdiff/50533a6dc515cc3182f5 2838275c9d2a1f5=
87604

- pg_dump support for comments on FOREIGN DATA WRAPPER and SERVER
objects. Shigeru Hanada, with some corrections.
=20
http://git.postgresql.org/pg/commitdiff/dd095b623ec4b41e8c57 28f9c5763759855=
54fd3

- Tab completion for COMMENT ON FOREIGN DATA WRAPPER / SERVER.
=20
http://git.postgresql.org/pg/commitdiff/e49ad77ff958b380ea6f a08c72e2dce97ac=
56c6b

- Avoid possible hang during smart shutdown. If a smart shutdown
occurs just as a child is starting up, and the child subsequently
becomes a walsender, there is a race condition: the postmaster might
count the exstant backends, determine that there is one normal
backend, and wait for it to die off. Had the walsender transition
already occurred before the postmaster counted, it would have
proceeded with the shutdown. To fix this, have each child that
transforms into a walsender kick the postmaster just after doing so,
so that the state machine is certain to advance. Fujii Masao
=20
http://git.postgresql.org/pg/commitdiff/38b27792eae99f5b4db2 411f5c57ef70f85=
0df5f

- Remove mention of using "man" from the tutorial. This isn't
applicable on Windows, and the internal link to the psql
documentation should be more than sufficient. Susanne Ebrecht
=20
http://git.postgresql.org/pg/commitdiff/1981fb73136433579cae 9a34fb3a12f1fcc=
519fc

- Improve documentation on the range of the numeric data type. Gianni
Ciolli, reviewed by Noah Misch.
=20
http://git.postgresql.org/pg/commitdiff/cabf5d84b6d1a92ab974 92d7e3d650548a9=
992cd

- Rearrange "add column" logic to merge columns at exec time. The
previous coding set attinhcount too high in some cases, resulting in
an undumpable, undroppable column. Per bug #5856, reported by Naoya
Anzai. See also commit 31b6fc06d83c6de3644c8f2921eb7de0eb92fac3,
which fixes a similar bug in ALTER TABLE .. ADD CONSTRAINT. Patch
by Noah Misch.
=20
http://git.postgresql.org/pg/commitdiff/6c5723998594dffa5d47 c3cf8c96ccf89c0=
33aae

Bruce Momjian pushed:

- Add 9.1 release note link for synchronous replication. We already
had links to the GUC variables that control it.
=20
http://git.postgresql.org/pg/commitdiff/5c22c0eda14594b5962a ed7165a012067b3=
3ab7d

- In pg_upgrade, add C comment about how autovacuum is disabled.
=20
http://git.postgresql.org/pg/commitdiff/d67b0bf471ba4e88aa3e d50871924efc91d=
7a27e

- Expand comment on how pg_upgrade is turning off autovacuum.
=20
http://git.postgresql.org/pg/commitdiff/d609b08ead450d78d4a5 67c48111aca6857=
ec59c

- Mention pg_upgrade sets autovacuum_freeze_max_age to maximum.
=20
http://git.postgresql.org/pg/commitdiff/da3418cea9bd10e9ea34 89b42f627877294=
2e745

Peter Eisentraut pushed:

- Add maintainer-check target. This can do various source code checks
that are not appropriate for either the build or the regression
tests. Currently: duplicate_oids, SGML syntax and tabs check, NLS
syntax check.
=20
http://git.postgresql.org/pg/commitdiff/6c0dfc035670240cddf0 092a4aa22e5815b=
6583d

- Make duplicate_oids return nonzero exit status if duplicates were
found. Automatic detection of errors is easier that way.
=20
http://git.postgresql.org/pg/commitdiff/aa6fdd186cf2c29e04d3 cc8ca19783fb904=
a5a33

- Update SQL features list. Feature F692 "Extended collation support"
is now also supported. This refers to allowing the COLLATE clause
anywhere in a column or domain definition instead of just directly
after the type. Also correct the name of the feature in accordance
with the latest SQL standard.
=20
http://git.postgresql.org/pg/commitdiff/f564e65cda32fd14f6f7 cdd85d116c421af=
731f2

Heikki Linnakangas pushed:

- Adjust error message, now that we expect other message types than
connection close at this point. Fix PQsetnonblocking() comment.
Fujii Masao
=20
http://git.postgresql.org/pg/commitdiff/bc03c5937d103952ef4f 40a3fa4514c1545=
38d25

- Automatically terminate replication connections that are idle for
more than replication_timeout (a new GUC) milliseconds. The TCP
timeout is often too long, you want the master to notice a dead
connection much sooner. People complained about that in 9.0 too,
but with synchronous replication it's even more important to notice
dead connections promptly. Fujii Masao and Heikki Linnakangas
=20
http://git.postgresql.org/pg/commitdiff/754baa21f723255272c2 4dc5f9ab456858e=
361e3

- Check that we've reached end-of-backup also when we're not
performing archive recovery. It's possible to restore an online
backup without recovery.conf, by simply copying all the necessary
WAL files to pg_xlog. "pg_basebackup -x" does that too. That's the
use case where this cross-check is useful. Backpatch to 9.0. We
used to do this in earlier versins, but in 9.0 the code was
inadvertently changed so that the check is only performed after
archive recovery. Fujii Masao.
=20
http://git.postgresql.org/pg/commitdiff/acf47401321ce55f0602 6a2f5d5512b404d=
a3e55

- Improve error message when WAL ends before reaching end of online
backup.
=20
http://git.postgresql.org/pg/commitdiff/1f0bab8494f7734e26b7 6fe34599c7763c8=
753a1

- Reword the phrase on zero replication_timeout in the docs.
=20
http://git.postgresql.org/pg/commitdiff/647f8b3dbaa68662f54a a762e9467874282=
c563d

- Don't leak the temporary PLyProcedure struct we create for inline
plpython blocks. Investigation by Jan Urbański, though I did=
n't use
his patch.
=20
http://git.postgresql.org/pg/commitdiff/ec7626504f0fc8cca46d 0f2a460e4b76177=
f79b3

- Increase SHMEM_INDEX_SIZE from 32 to 64. We're currently at 40
entries in ShmemIndex, so 64 leaves some headroom. Kevin Grittner
=20
http://git.postgresql.org/pg/commitdiff/c8ae318cbeceadac172a a6b9cfa43734b08=
36e5e

- Fix a tiny race condition in predicate locking. Need to hold the
lock while examining the head of predicate locks list. Also, fix
the comment of RemoveTargetIfNoLongerUsed, it was neglected when we
changed the way update chains are handled. Kevin Grittner.
=20
http://git.postgresql.org/pg/commitdiff/60b142b9a6f413a92665 766a1f265b361f6=
8c20b

- Fix two missing spaces in error messages. Josh Kupershmidt.
=20
http://git.postgresql.org/pg/commitdiff/9d56886112d8307dcd28 ce49048a770c5d2=
6acf9

- Escape greater than and less than characters in docs. Susanne
Ebrecht and me.
=20
http://git.postgresql.org/pg/commitdiff/d420ba2a2d4ea4831f89 a3fd7ce86b05eff=
932ff

Andrew Dunstan pushed:

- Attempt to unbreak windows builds broken by commit 754baa2.
=20
http://git.postgresql.org/pg/commitdiff/382fb6a08f524327b5e3 084b3652fba2e12=
f1ba2

Magnus Hagander pushed:

- Avoid palloc before CurrentMemoryContext is set up on win32.
Instead, write the unconverted output - it will be in the wrong
encoding, but at least we don't crash. Rushabh Lathia
=20
http://git.postgresql.org/pg/commitdiff/5735efee15540765315a a8c1a230575e756=
037f7

== Abgelehnte Patches (bis jetzt) ==

No one was disappointed this week :-)

== Eingesandte Patches ==

Heikki Linnakangas sent in a variant patch to prevent memory leaks in
DO blocks.

Heikki Linnakangas sent in another revision of the patch to add a
replication server timeout.

Bernd Helmle sent in another revision of the patch to use a more
reasonable size for \dt in psql.

Simon Riggs sent in a patch which adds 5 more levels of durability to
sync rep.

Joseph Adams sent in five more revisions of the patch to add JSON as
a data type.

Kevin Grittner sent in a patch to prevent large tables from breaking
SSI by overflowing predicate lock hash buckets.

Peter Eisentraut sent in a patch to fix complaints from gcc 4.6.

Peter Eisentraut sent in a patch to fix a case where typed tables
broke pg_upgrade.

Robert Haas and Shigeru HANADA traded patches to allow commenting on
SQL/MED objects.

Peter Eisentraut sent in a patch to fix how exit_nicely() works.

Radoslaw Smogura sent in another revision of the patch to add a second
level buffer cache.

Jan Wieck sent in a patch to fix an issue with autovacuum performance.

Merlin Moncure sent in a patch to fix an issue with the hint bit
cache.

Alexey Klyukin sent in a patch to help build the infrastructure for a
validator for configuration files.

Bruce Momjian sent in a patch to adjust a comment in autovacuum.c.

Joseph Adams sent in a patch to allow casting int2, int4 and int8 to
money.

Shigeru HANADA sent in two revisions of a patch to fix the foreign
table docs.

Brendan Jurd sent in a patch to rationalize parsing of pg_hba.conf.

Rushabh Lathia sent in a patch to fix a crash on Windows.

Dan Ports sent in a patch to display the pid of the holding
transaction in SSI.

Dan Ports sent in a patch to fix an issue in SSI where a lock could be
taken but never cleared.

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




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