While looking at Alexander's GiST fastbuild patch, which adds buffers to
internal nodes to avoid random I/O during index build, it occurred to me
that inserting the tuples to the leaf pages one at a time is quite
inefficient too, even if the leaf pages are in cache. There's still the
overhead
On Sun, Aug 14, 2011 at 12:16:39AM -0400, Robert Haas wrote:
On Fri, Aug 12, 2011 at 7:19 PM, daveg da...@sonic.net wrote:
This seems to be bug month for my client. Now there are seeing periods
where all new connections fail immediately with the error:
FATAL: lock AccessShareLock on
On Tue, Aug 23, 2011 at 6:30 AM, Pavel Stehule pavel.steh...@gmail.com wrote:
Hello
I am returning back to discus two months ago about usage of
plpgsql_lint. I integrated this module to plpgsql's core. This feature
is controlled via plpgsql GUC variable prepare_plans and via plpgsql
option.
Is it possible to raise warnings at function creation time?
when this code will be in core, then it is possible without one
significant exceptions - triggers :( I am not able to specify a target
table - and real type for NEW and OLD records.
Regards
Pavel
merlin
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Sent via
On Mon, Aug 22, 2011 at 7:07 PM, Alvaro Herrera
alvhe...@commandprompt.com wrote:
Excerpts from Simon Riggs's message of dom ago 21 16:23:39 -0300 2011:
In common cases of snapshot use we run GetSnapshotData() into a
statically allocated snapshot, then immediately copy the static struct
into a
Excerpts from Simon Riggs's message of mar ago 23 10:56:17 -0300 2011:
On Mon, Aug 22, 2011 at 7:07 PM, Alvaro Herrera
alvhe...@commandprompt.com wrote:
Excerpts from Simon Riggs's message of dom ago 21 16:23:39 -0300 2011:
In common cases of snapshot use we run GetSnapshotData() into a
Back in 2009, I proposed the idea of Lazy Snapshots.
The idea was to put off generating a snapshot until we need one.
I have further ideas on this now.
In general, this was a bad idea because...
On Tue, 2009-08-18 at 10:18 -0400, Tom Lane wrote:
Simon, this concept is completely broken, as far
On Mon, Aug 22, 2011 at 10:25 PM, Robert Haas robertmh...@gmail.com wrote:
I've been giving this quite a bit more thought, and have decided to
abandon the scheme described above, at least for now.
I liked your goal of O(1) snapshots and think you should go for that.
I didn't realise you were
One of my goals for the extensions feature has been that we should be able
to get rid of the pg_pltemplate system catalog, moving all the information
therein into languages' extension definition files. This would allow
third-party procedural languages to be installed as easily as built-in
ones.
Simon Riggs si...@2ndquadrant.com writes:
Back in 2009, I proposed the idea of Lazy Snapshots.
The idea was to put off generating a snapshot until we need one.
It was a broken idea then, and it has not become less so with the
passage of time.
However, that does not exclude a number of cases
Robert Haas robertmh...@gmail.com writes:
With respect to the first problem, what I'm imagining is that we not
do a complete rewrite of the snapshot in shared memory on every
commit. Instead, when a transaction ends, we'll decide whether to (a)
write a new snapshot or (b) just record the XIDs
On Mon, Aug 22, 2011 at 3:31 AM, daveg da...@sonic.net wrote:
So far I've got:
- affects system tables
- happens very soon after process startup
- in 8.4.7 and 9.0.4
- not likely to be hardware or OS related
- happens in clusters for period of a few second to many minutes
I'll work
On Tue, Aug 23, 2011 at 12:13 PM, Tom Lane t...@sss.pgh.pa.us wrote:
I'm a bit concerned that this approach is trying to optimize the heavy
contention situation at the cost of actually making things worse anytime
that you're not bottlenecked by contention for access to this shared
data
Robert Haas robertmh...@gmail.com writes:
I think the real trick is figuring out a design that can improve
concurrency.
I'm far from familiar with the detailed concepts here, but allow me to
comment. I have two open questions:
- is it possible to use a distributed algorithm to produce XIDs,
Given a document and a query, the goal of headline generation is to
produce text excerpts in which the query appears. Currently the headline
generation in postgres follows the following steps:
1. Tokenize the documents and obtain the lexemes
2. Decide on lexemes that should be the part of the
Recently a bug was reported on the JDBC list regarding table
privileges. It turns out that we have not been parsing the ACL tables
correctly. This is partially due to having to track the catalogs
through each version. So this breaks down into two questions
1) is it possible to get all of the ACL
On Aug 23, 2011, at 8:31 AM, Tom Lane wrote:
One of my goals for the extensions feature has been that we should be able
to get rid of the pg_pltemplate system catalog, moving all the information
therein into languages' extension definition files. This would allow
third-party procedural
Robert Haas robertmh...@gmail.com writes:
That's certainly a fair concern, and it might even be worse than
O(n^2). On the other hand, the current approach involves scanning the
entire ProcArray for every snapshot, even if nothing has changed and
90% of the backends are sitting around playing
Attached is the latest version of the Range Types patch. I will get it
into better shape before the commitfest, but wanted to put up a draft in
case anyone had comments on the TODO items.
Changes:
* Uses BTree opclass rather than compare function.
* Collation specified at type definition
The attached patch adds an option to the COPY command to skip writing
WAL when the following conditions are all met:
1) The table is empty (zero size on disk)
2) The copy command can obtain an access exclusive lock on the table
with out blocking.
3) The WAL isn't needed for replication
For
Heikki Linnakangas heikki.linnakan...@enterprisedb.com wrote:
Committed. I removed the second expected output file, and marked
the prepared-transactions tests in the schedule as ignore
instead. That way if max_prepared_transactions=0, you get a notice
that the test case failed, but
David E. Wheeler da...@kineticode.com writes:
On Aug 23, 2011, at 8:31 AM, Tom Lane wrote:
Having done that, we'd mark all the standard trusted PLs as dba_create,
expand the existing definition scripts for the PL extensions so that they
fully specify the languages and their support functions
On tis, 2011-08-23 at 12:48 -0400, Dave Cramer wrote:
Recently a bug was reported on the JDBC list regarding table
privileges. It turns out that we have not been parsing the ACL tables
correctly. This is partially due to having to track the catalogs
through each version. So this breaks down
Sushant Sinha sushant...@gmail.com writes:
Given a document and a query, the goal of headline generation is to
produce text excerpts in which the query appears.
... right ...
Here is a simple patch that limits the number of words during the
tokenization phase and puts an upper-bound on the
Steve Singer ssin...@ca.afilias.info writes:
The attached patch adds an option to the COPY command to skip writing
WAL when the following conditions are all met:
1) The table is empty (zero size on disk)
2) The copy command can obtain an access exclusive lock on the table
with out
Tom Lane t...@sss.pgh.pa.us writes:
We'll add a new boolean parameter to extension control files, called say
dba_create (ideas for better names welcome). If it's missing or set
to false, there's no change in behavior. When it's true, then
(a) you must be superuser or owner of the current
Excerpts from Tom Lane's message of mar ago 23 15:59:18 -0300 2011:
Sushant Sinha sushant...@gmail.com writes:
Given a document and a query, the goal of headline generation is to
produce text excerpts in which the query appears.
... right ...
Here is a simple patch that limits the
Dimitri Fontaine dimi...@2ndquadrant.fr writes:
Tom Lane t...@sss.pgh.pa.us writes:
We'll add a new boolean parameter to extension control files, called say
dba_create (ideas for better names welcome). If it's missing or set
to false, there's no change in behavior. When it's true, then
On Tue, Aug 23, 2011 at 3:09 PM, Dimitri Fontaine
dimi...@2ndquadrant.fr wrote:
Tom Lane t...@sss.pgh.pa.us writes:
We'll add a new boolean parameter to extension control files, called say
dba_create (ideas for better names welcome). If it's missing or set
to false, there's no change in
Attached is an undocumented patch that allows a user to have pg_dump
exclude data but not DDL for a table. One use case for this is a very
large table that changes infrequently, and for which dumping data
frequently would be wasteful and unnecessary. This is especially useful
in conjunction
On Tue, Aug 23, 2011 at 3:05 PM, Tom Lane t...@sss.pgh.pa.us wrote:
Steve Singer ssin...@ca.afilias.info writes:
The attached patch adds an option to the COPY command to skip writing
WAL when the following conditions are all met:
1) The table is empty (zero size on disk)
2) The copy command
Tom Lane t...@sss.pgh.pa.us writes:
That's called sudo on linux. I propose that we stick to such a name.
I'm not impressed with that name: it will mean nothing to Windows users,
nor for that matter to many non-sysadmin types on Unix.
Fair enough.
Do we want a more general SUDO facility in
Christopher Browne cbbro...@gmail.com writes:
Actually, this is somewhat more like UNIX setuid (2).
When I first started using SECURITY DEFINER functions, I thought of it
as being like sudo. But it's really like setuid.
I see SECURITY DEFINER functions definitely as setuid for PostgreSQL,
Robert Haas robertmh...@gmail.com writes:
What I think would be really interesting is a way to make this work
when the table *isn't* empty. In other words, have a COPY option that
(1) takes an exclusive lock on the table, (2) writes the data being
inserted into new pages beyond the old EOF,
Excerpts from Robert Haas's message of mar ago 23 17:08:50 -0300 2011:
What I think would be really interesting is a way to make this work
when the table *isn't* empty. In other words, have a COPY option that
(1) takes an exclusive lock on the table, (2) writes the data being
inserted into
Attached is an undocumented patch that allows pg_restore to omit
post-data items or omit all but post-data items. This has been discussed
before, and Simon sent in a patch back on 2008, which has bitrotted
some. I'm not sure why it was dropped at the time, but I think it's time
to do this.
On 11-08-23 04:17 PM, Tom Lane wrote:
Robert Haasrobertmh...@gmail.com writes:
What I think would be really interesting is a way to make this work
when the table *isn't* empty. In other words, have a COPY option that
(1) takes an exclusive lock on the table, (2) writes the data being
inserted
On Tue, Aug 23, 2011 at 4:17 PM, Tom Lane t...@sss.pgh.pa.us wrote:
Robert Haas robertmh...@gmail.com writes:
What I think would be really interesting is a way to make this work
when the table *isn't* empty. In other words, have a COPY option that
(1) takes an exclusive lock on the table, (2)
Excerpts from Robert Haas's message of mar ago 23 17:43:13 -0300 2011:
On Tue, Aug 23, 2011 at 4:17 PM, Tom Lane t...@sss.pgh.pa.us wrote:
Robert Haas robertmh...@gmail.com writes:
What I think would be really interesting is a way to make this work
when the table *isn't* empty. In other
In the CREATE DOMAIN reference page of the current HEAD, it says
---
CREATE DOMAIN us_postal_code AS TEXT
CHECK(
VALUE ~ '^\\d{5}$'
OR VALUE ~ '^\\d{5}-\\d{4}$'
);
---
but I believe it should conform the standard string style now that the
default is standard_conforming_strings = on. I didn't
Erik Rijkers e...@xs4all.nl writes:
The below SQL causes:
TRAP: FailedAssertion(!(item_width 0), File: costsize.c, Line: 3274)
Thanks, I've applied a patch for this.
regards, tom lane
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To make
On Tue, 2011-08-23 at 15:05 -0400, Tom Lane wrote:
Steve Singer ssin...@ca.afilias.info writes:
The attached patch adds an option to the COPY command to skip writing
WAL when the following conditions are all met:
1) The table is empty (zero size on disk)
2) The copy command can obtain
Whilst testing the schema-creation-permissions scenario that Kaigai-san
recently pointed out, I happened to do this:
regression=# create schema c;
CREATE SCHEMA
regression=# create extension cube with schema c;
CREATE EXTENSION
regression=# drop schema c;
DROP SCHEMA
... er, what? I was
I got burnt tonight by the fact that the earthdistance contrib module
runs its regression test in database regression, not
contrib_regression as I was expecting and as every other contrib
module does. The reason turns out to be that
earthdistance/Makefile does this:
REGRESS_OPTS =
Here is a simple patch that limits the number of words during the
tokenization phase and puts an upper-bound on the headline generation.
Doesn't this force the headline to be taken from the first N words of
the document, independent of where the match was? That seems rather
unworkable,
Kohei KaiGai kai...@kaigai.gr.jp writes:
The attached patch adds permission check at the scenario that I
explained bellow.
Instead of using this patch, I changed the code to call
CreateSchemaCommand itself. The test that was still missing was the one
to restrict the schema name to not start
Sushant Sinha sushant...@gmail.com writes:
Doesn't this force the headline to be taken from the first N words of
the document, independent of where the match was? That seems rather
unworkable, or at least unhelpful.
In headline generation function, we don't have any index or knowledge of
Actually, this code seems probably flat-out wrong: won't every
successful call of hlCover() on a given document return exactly the same
q value (end position), namely the last token occurrence in the
document? How is that helpful?
regards, tom lane
There is a line
I wrote:
... So I'm thinking this recursive call should
just pass DEPFLAG_NORMAL in all cases:
On further reflection, it seems more in keeping with the coding
elsewhere in this module to treat this as a distinct dependency type,
instead of confusing it with a NORMAL dependency. There's no
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