Tag: waiting

Waiting for 9.2 – filtered info in explain analyze

On 22nd of September, Tom Lane committed patch:

Make EXPLAIN ANALYZE report the numbers of rows rejected by filter steps.
 
This provides information about the numbers of tuples that were visited
but not returned by table scans, as well as the numbers of join tuples
that were considered and discarded within a join plan node.
 
There is still some discussion going on about the best way to report counts
for outer-join situations, but I think most of what's in the patch would
not change if we revise that, so I'm going to go ahead and commit it as-is.
 
Documentation changes to follow (they weren't in the submitted patch
either).
 
Marko Tiikkaja, reviewed by Marc Cousin, somewhat revised by Tom

Continue reading Waiting for 9.2 – filtered info in explain analyze

Waiting for 9.2 – cascading streaming replication

On 19th of July, Simon Riggs committed patch:

Cascading replication feature for streaming log-based replication.
Standby servers can now have WALSender processes, which can work with
either WALReceiver or archive_commands to pass data. Fully updated
docs, including new conceptual terms of sending server, upstream and
downstream servers. WALSenders terminated when promote to master.
 
Fujii Masao, review, rework and doc rewrite by Simon Riggs

Continue reading Waiting for 9.2 – cascading streaming replication

Waiting for 9.2 – Stacked Diagnostics in PL/pgSQL

On 18th of July, Tom Lane committed patch:

Add GET STACKED DIAGNOSTICS plpgsql command to retrieve exception info.
 
This is more SQL-spec-compliant, more easily extensible, and better
performing than the old method of inventing special variables.
 
Pavel Stehule, reviewed by Shigeru Hanada and David Wheeler

Continue reading Waiting for 9.2 – Stacked Diagnostics in PL/pgSQL

Waiting for 9.2 – Avoiding reindexing on alter type of indexed column

On 18th of July, Robert Haas committed patch:

Avoid index rebuild for no-rewrite ALTER TABLE .. ALTER TYPE.
 
Noah Misch.  Review and minor cosmetic changes by me.

Continue reading Waiting for 9.2 – Avoiding reindexing on alter type of indexed column

Waiting for 9.2 – relative paths in psql

On 6th of July, Robert Haas committed patch:

Add \ir command to psql.
 
\ir is short for "include relative"; when used from a script, the
supplied pathname will be interpreted relative to the input file,
rather than to the current working directory.
 
Gurjeet Singh, reviewed by Josh Kupershmidt, with substantial further
cleanup by me.

Continue reading Waiting for 9.2 – relative paths in psql

Waiting for 9.2 – NOT VALID CHECKS

On 30th of June, Alvaro Herrera committed patch:

Enable CHECK constraints to be declared NOT VALID
 
This means that they can initially be added to a large existing table
without checking its initial contents, but new tuples must comply to
them; a separate pass invoked by ALTER TABLE / VALIDATE can verify
existing data and ensure it complies with the constraint, at which point
it is marked validated and becomes a normal part of the table ecosystem.
 
An non-validated CHECK constraint is ignored in the planner for
constraint_exclusion purposes; when validated, cached plans are
recomputed so that partitioning starts working right away.
 
This patch also enables domains to have unvalidated CHECK constraints
attached to them as well by way of ALTER DOMAIN / ADD CONSTRAINT / NOT
VALID, which can later be validated with ALTER DOMAIN / VALIDATE
CONSTRAINT.
 
Thanks to Thom Brown, Dean Rasheed and Jaime Casanova for the various
reviews, and Robert Hass for documentation wording improvement
suggestions.
 
This patch was sponsored by Enova Financial.

Continue reading Waiting for 9.2 – NOT VALID CHECKS

Waiting for 9.1 – final post

And so, it happened. After todays refresh of my Pg, I got:

$ select version();
                                                        version                                                         
------------------------------------------------------------------------------------------------------------------------
 PostgreSQL 9.2devel on x86_64-unknown-linux-gnu, compiled by gcc-4.5.real (Ubuntu/Linaro 4.5.2-8ubuntu4) 4.5.2, 64-bit
(1 row)

Yes. We're in 9.2 development now. Looks like we got another really cool release coming soon.

Thanks a lot to all developers.

Waiting for 9.1 – Synchronous replication

On 6th of March, Simon Riggs committed patch:

Efficient transaction-controlled synchronous replication.
If a standby is broadcasting reply messages and we have named
one or more standbys in synchronous_standby_names then allow
users who set synchronous_replication to wait for commit, which
then provides strict data integrity guarantees. Design avoids
sending and receiving transaction state information so minimises
bookkeeping overheads. We synchronize with the highest priority
standby that is connected and ready to synchronize. Other standbys
can be defined to takeover in case of standby failure.
 
This version has very strict behaviour; more relaxed options
may be added at a later date.
 
Simon Riggs and Fujii Masao, with reviews by Yeb Havinga, Jaime
Casanova, Heikki Linnakangas and Robert Haas, plus the assistance
of many other design reviewers.

Continue reading Waiting for 9.1 – Synchronous replication

Waiting for 9.1 – Writable CTE

On 25th of February, Tom Lane committed patch:

Support data-modifying commands (INSERT/UPDATE/DELETE) in WITH.   
 
This patch implements data-modifying WITH queries according to the           
semantics that the updates all happen with the same command counter value,
and in an unspecified order.  Therefore one WITH clause can't see the 
effects of another, nor can the outer query see the effects other than
through the RETURNING values.  And attempts to do conflicting updates will
have unpredictable results.  We'll need to document all that.           
 
This commit just fixes the code; documentation updates are waiting on
author.                                                                 
 
Marko Tiikkaja and Hitoshi Harada

Continue reading Waiting for 9.1 – Writable CTE