On Wed, 2005-11-30 at 07:18 +0100, Martijn van Oosterhout wrote:
And finally, why can't:
Select * From Sales where month IN (
select month from time_dimension where FinYear = 2005 and Quarter = 3)
Be written as:
Select sales.* From Sales, time_dimension
where month =
On Wed, 2005-11-30 at 02:10 -0500, Tom Lane wrote:
Simon Riggs [EMAIL PROTECTED] writes:
[...context omitted...]
We would need to flush all the blocks in the table out of cache at
commit time, for that table only.
This seems striking close to the Old Concept of temp tables, which
we got
On Fri, Dec 02, 2005 at 08:18:44AM +, Simon Riggs wrote:
It can, of course, but there must be value in that optimization.
If you consider how IN () would be transformed into
=ANY(ARRAY(subselect)) you'll see that the subselect values would be
treated as constants that could result in a
On Thu, 2005-12-01 at 22:01, Tom Lane wrote:
Greg Stark [EMAIL PROTECTED] writes:
On the other hand the type I would prefer to see are hints that feed
directly
into filling in information the planner lacks. This only requires that the
user understand his own data and still lets the
On Wed, 30 Nov 2005 13:53:13 -0500, Tom Lane [EMAIL PROTECTED]
wrote:
The way the attached patch attacks this is for the shared-lock access
case to simply set the page's LRU counter to zero, without bumping up
the LRU counters of the other pages as the normal adjustment would do.
If you still
On Fri, Dec 02, 2005 at 11:07:06AM +0100, Csaba Nagy wrote:
So for me the hint mechanism is good for telling the server that I'm
not interested at all in the BEST plan but which risks getting very bad
on occasions, but in a good enough plan which is safe.
I'm wondering if long term another
Hi
We are trying to implement a progress estiamator for long queries. We
are trying to make the display graphical using GTK but we get an error
saying
Xlib : Connection to :0.0 refused by server
xlib : no protocol specified
GTK-warning ** : Cannot open display
Can someone suggest a method to
On Fri, Dec 02, 2005 at 04:15:55PM +0530, Anuj Tripathi wrote:
Hi
We are trying to implement a progress estiamator for long queries. We
are trying to make the display graphical using GTK but we get an error
saying
Xlib : Connection to :0.0 refused by server
xlib : no protocol specified
Anuj Tripathi wrote:
Hi
We are trying to implement a progress estiamator for long queries. We
are trying to make the display graphical using GTK but we get an error
saying
Xlib : Connection to :0.0 refused by server
xlib : no protocol specified
GTK-warning ** : Cannot open display
Can
Michael Glaesemann said:
Out of curiosity, what is this beast?
http://pgbuildfarm.org/cgi-bin/show_log.pl?nm=beardt=2005-11-13%
2012:01:08
pilot error. I'll clean it up.
cheers
andrew
---(end of broadcast)---
TIP 5: don't forget to
On Dec 2, 2005, at 20:54 , Andrew Dunstan wrote:
Michael Glaesemann said:
Out of curiosity, what is this beast?
http://pgbuildfarm.org/cgi-bin/show_log.pl?nm=beardt=2005-11-13%
2012:01:08
pilot error. I'll clean it up.
Shucks. I was hoping it was a secret new port that reduced count(*)
Greg Stark [EMAIL PROTECTED] writes:
You more or less missed my entire point.
Only because I am still getting used to how powerful and flexible
Postgres is; but I am working on expanding my horizons.
In the extreme, no amount of added intelligence in the optimizer is
going
to
help it come up
Manfred Koizar [EMAIL PROTECTED] writes:
On Wed, 30 Nov 2005 13:53:13 -0500, Tom Lane [EMAIL PROTECTED]
wrote:
The way the attached patch attacks this is for the shared-lock access
case to simply set the page's LRU counter to zero, without bumping up
the LRU counters of the other pages as the
On Fri, 2005-12-02 at 02:14 -0500, Tom Lane wrote:
Greg Stark [EMAIL PROTECTED] writes:
It was a *major* new feature that many people were waiting for when Oracle
finally implemented live CREATE INDEX and REINDEX. The ability to run create
an index without blocking any operations on a
The optimizer seems to want to use sequential scans on inherited tables
when crossed with another table, as the following seems to demonstrate:
Create Table base(f1 bigserial);
create table inh1(f2 bigint) inherits (base);
create table inh2(f2 bigint) inherits (base);
create table inh3(f2
What are you doing? Trying to run the GTK application in the same server as
the database?
Or are you trying to do a graphical interface in a server without an X
server?. I guess there is something very bad with your approach, I guess
your graphical interface should be running in the client side
In the extreme, no amount of added intelligence in the optimizer is going to
help it come up with any sane selectivity estimate for something like
WHERE radius_authenticate(user) = 'OK'
Why not?
The missing capability in this case is to be able to provide or generate
(self learning?)
On 12/2/05, Anuj Tripathi [EMAIL PROTECTED] wrote:
Hi
We are trying to implement a progress estiamator for long queries. We
are trying to make the display graphical using GTK but we get an error
saying
Xlib : Connection to :0.0 refused by server
xlib : no protocol specified
GTK-warning **
Philip Warner [EMAIL PROTECTED] writes:
The optimizer seems to want to use sequential scans on inherited tables
when crossed with another table, as the following seems to demonstrate:
Is it intentional that your test case omits an analyze on t2? Coz when
I add that, I get the same plan you
Good Morning,
I'm an italian student and I'm working on a project involving postgres. I'm
sorry for my very bad english. I've some questions:
1)Does postgres upport semi-joins?
2)What about projections or selections in query tree writing? Does Postgres
support algebraic space (in other word
Good Morning,
I'm an italian student and I'm working on a project involving postgres. I'm
sorry for my very bad english. I've some questions:
1)Does postgres upport semi-joins?
2)What about projections or selections in query tree writing? Does Postgres
support algebraic space (in other word
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Hash: SHA1
Is there something weird going on with the lists?
I ask because lately there has been spam showing up rather frequently,
I'm not seeing this here. Can you point to a specific message on hackers?
The only list I see that has spam is pg-press.
Greg Sabino Mullane wrote:
-BEGIN PGP SIGNED MESSAGE-
Hash: SHA1
Is there something weird going on with the lists?
I ask because lately there has been spam showing up rather frequently,
I'm not seeing this here. Can you point to a specific message on hackers?
The only
Simon Riggs [EMAIL PROTECTED] writes:
On Fri, 2005-12-02 at 02:14 -0500, Tom Lane wrote:
Greg Stark [EMAIL PROTECTED] writes:
It was a *major* new feature that many people were waiting for when Oracle
finally implemented live CREATE INDEX and REINDEX. The ability to run
create
an
Rod Taylor [EMAIL PROTECTED] writes:
In the extreme, no amount of added intelligence in the optimizer is going to
help it come up with any sane selectivity estimate for something like
WHERE radius_authenticate(user) = 'OK'
Why not?
The missing capability in this case is to be
On 02 Dec 2005 15:25:58 -0500, Greg Stark [EMAIL PROTECTED] wrote:
I suspect this comes out of a very different storage model from Postgres's.
Postgres would have no trouble building an index of the existing data using
only shared locks. The problem is that any newly inserted (or updated)
On 02 Dec 2005 15:49:02 -0500, Greg Stark [EMAIL PROTECTED] wrote:
Rod Taylor [EMAIL PROTECTED] writes:
The missing capability in this case is to be able to provide or generate
(self learning?) statistics for a function that describe a typical result
and the cost of getting that result.
Gregory Maxwell wrote:
On 02 Dec 2005 15:25:58 -0500, Greg Stark [EMAIL PROTECTED] wrote:
I suspect this comes out of a very different storage model from Postgres's.
Postgres would have no trouble building an index of the existing data using
only shared locks. The problem is that any
On Fri, 2005-12-02 at 19:04 -0300, Alvaro Herrera wrote:
Gregory Maxwell wrote:
On 02 Dec 2005 15:25:58 -0500, Greg Stark [EMAIL PROTECTED] wrote:
I suspect this comes out of a very different storage model from
Postgres's.
Postgres would have no trouble building an index of the
On 12/2/05, Alvaro Herrera wrote:
Gregory Maxwell wrote:
After you're mostly caught up, change locking behavior to block
further updates while the final catchup happens. This could be driven
by a hurestic that says make up to N attempts to catch up without
blocking, after that just take a
Simon Riggs [EMAIL PROTECTED] writes:
CREATE INDEX uses SnapshotAny, so the scan that feeds the build could
easily include rows added after the CREATE INDEX started. When the scan
was exhausted we could mark that last TID and return to it after the
sort/build.
And do what? This has nothing
I never saw a followup to this. Is someone working on a ping protocol
extension, or should we revert pg_ctl to using template1 on the ground
that it does a poor man's ping anyway?
cheers
andrew
Andrew Dunstan wrote:
Tom Lane wrote:
Andrew Dunstan [EMAIL PROTECTED] writes:
I now
It appears that a bunch of spammers have invaded -hackers, claiming they
can avoid the heat death of the universe in exchange for 2 bytes.
Or something like that. :-)
Even my Krull-powered Spam filters can't cope.
Best Regards, Simon Riggs
---(end of
On Fri, 2005-12-02 at 11:53 +0100, Martijn van Oosterhout wrote:
On Fri, Dec 02, 2005 at 11:07:06AM +0100, Csaba Nagy wrote:
So for me the hint mechanism is good for telling the server that I'm
not interested at all in the BEST plan but which risks getting very bad
on occasions, but in a
Is it possible to submit a hand written or arbitrary execution plan to the
retrieval engine? (That is, can one bypass the SQL parser and planner or
optimizer and just provide instructions to nested loop join table a to table
b ...)
---(end of
I haven't received any yet, that I can tell ... sure its coming through
the lists, and not around them?
On Fri, 2 Dec 2005, Simon Riggs wrote:
It appears that a bunch of spammers have invaded -hackers, claiming they
can avoid the heat death of the universe in exchange for 2 bytes.
Or
Jochem van Dieten [EMAIL PROTECTED] writes:
How about the following sceanrio for building a new index:
- create an empty index
- flag it as incomplete
- commit it so it becomes visible to new transactions
- new transactions will update the index when inserting / updating
- the planner will
We have very strange behavior from an internal production database.
There are multiple symptoms, all pointing to a problem with clusterwide
tables. For example:
[EMAIL PROTECTED]:~ psql -U postgres -p 5433 cyspec
Welcome to psql 7.4.8, the PostgreSQL interactive terminal.
Type: \copyright
Marc G. Fournier [EMAIL PROTECTED] writes:
On Fri, 2 Dec 2005, Simon Riggs wrote:
Even my Krull-powered Spam filters can't cope.
I haven't received any yet, that I can tell ... sure its coming through
the lists, and not around them?
I think Simon is complaining about the length of the
Joe Conway [EMAIL PROTECTED] writes:
We have very strange behavior from an internal production database.
There are multiple symptoms, all pointing to a problem with clusterwide
tables. For example:
psql -l really should produce the same results as doing \l in the
template1 database. Does it?
On 12/2/2005 6:19 PM, Marc G. Fournier wrote:
I haven't received any yet, that I can tell ... sure its coming through
the lists, and not around them?
Some Tom Lane guy and a bunch of other well known addresses sent it.
Could be forged From fields though ;-)
Jan
On Fri, 2 Dec 2005,
*roll eyes* Its not even April Fools yet ...
On Fri, 2 Dec 2005, Jan Wieck wrote:
On 12/2/2005 6:19 PM, Marc G. Fournier wrote:
I haven't received any yet, that I can tell ... sure its coming through the
lists, and not around them?
Some Tom Lane guy and a bunch of other well known
Joe Conway [EMAIL PROTECTED] writes:
So they agree in template1 and cyspec databases.
OK, in that case I'd wonder about whether you've suffered XID wraparound
in pg_database and/or pg_shadow. The typical symptom of this is that
entries are valid from the system's point of view but not visible
Tom Lane wrote:
Joe Conway [EMAIL PROTECTED] writes:
So they agree in template1 and cyspec databases.
OK, in that case I'd wonder about whether you've suffered XID wraparound
in pg_database and/or pg_shadow. The typical symptom of this is that
entries are valid from the system's point of
Joe Conway [EMAIL PROTECTED] writes:
Tom Lane wrote:
You could try a VACUUM FREEZE on pg_database though.
Since this is a production machine, putting pg_filedump on it may be
problematic -- if I grovel through the bits by hand, can you give me a
hint about what to look for?
How about you
Is it intentional that your test case omits an analyze on t2?
No; my mistake.
(The larger point that joins of inheritance unions aren't well-planned
is true, but it's always been true...)
It also seems to have a probkem with unions in views.
Is there anything that can be done about this --
Philip Warner [EMAIL PROTECTED] writes:
(The larger point that joins of inheritance unions aren't well-planned
is true, but it's always been true...)
It also seems to have a probkem with unions in views.
Is there anything that can be done about this -- workarounds etc? Any
plans to address
Joe Conway [EMAIL PROTECTED] writes:
Since this database has many large, but static tables (i.e. new data is
loaded each day, but the tables are partitioned into year-month tables),
I'm thinking we can run VACUUM FREEZE on the whole database once, and
then run VACUUM FREEZE periodically on
Tom Lane wrote:
Joe Conway [EMAIL PROTECTED] writes:
Since this database has many large, but static tables (i.e. new data is
loaded each day, but the tables are partitioned into year-month tables),
I'm thinking we can run VACUUM FREEZE on the whole database once, and
then run VACUUM FREEZE
Hi everyone,
I've been able to successfully build server extension using Visual
Studio 2005 for Windows Postgresql 8.1. However, it took a few tweaks
which I thought I should document (maybe these issues could be fixed in
future postgresql versions?):
1. There is no lib file for VC++ to
Joe Conway [EMAIL PROTECTED] writes:
cyspec=# vacuum freeze pg_catalog.pg_class;
ERROR: failed to re-find parent key in pg_class_relname_nsp_index
It seems that we cannot vacuum pg_class, because vacuum itself fails.
Any suggestions on how to bootstrap the fixing of pg_class?
REINDEX?
Tom Lane wrote:
Joe Conway [EMAIL PROTECTED] writes:
cyspec=# vacuum freeze pg_catalog.pg_class;
ERROR: failed to re-find parent key in pg_class_relname_nsp_index
It seems that we cannot vacuum pg_class, because vacuum itself fails.
Any suggestions on how to bootstrap the fixing of
Tom Lane wrote:
It's something that's on the ever-growing TODO list ... I dunno if
anyone has any near-term plans to work on it. It'd definitely be
nice to teach the planner to do joins-over-unions well, and then
make inheritance just invoke that behavior instead of being a crocky
special case.
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