How does Index scan perform a scan for overlapping Index Cond ?
If I get a plan like this, what will actually be performed if EXPLAIN
shows this:
Sort (cost=12.90..12.91 rows=1 width=207)
Sort Key: log_actionseq
- Index Scan using sl_log_1_idx2_hu, sl_log_1_idx2_hu,
sl_log_1_idx2_hu,
Supports any glibc platform and possibly Win32.
Adds:
SELECT ... ORDER BY expr COLLATE 'locale'
CREATE INDEX locale_index ON table(expr COLLATE 'locale')
Index scan used when COLLATE order permits
This is just a proof of concept patch. I didn't send it to -patches
because as Tom pointed
And I think VC++ 6.0 is ok, it is power enough and not so big for
pgsql's
development. And latter versions of VC++ can automatically convert
6.0's
project files. There are also a VC++7 to VC++6 project converter
on
www.codeproject.com.
| You might be surprised to know that this has
Rewriting all my Oracle code function-by-function could be painful
...
I'm still trying to hold on to my fantasy that I can hack Postgres (and
contrib/ora2pg) into submission.
Why don't you just use EnterpriseDB?
I looked at EnterpriseDB a few months ago. The installation errored.
It
Hannu Krosing [EMAIL PROTECTED] writes:
If I get a plan like this, what will actually be performed if EXPLAIN
shows this:
Sort (cost=12.90..12.91 rows=1 width=207)
Sort Key: log_actionseq
- Index Scan using sl_log_1_idx2_hu, sl_log_1_idx2_hu,
sl_log_1_idx2_hu, sl_log_1_idx2_hu on
I think the most popular method to build a project on Win32
is using
MSVC or Intel C. Intel C can be integrated with MSVC's IDE to help
developers increase their productivity. Actually I have
tried to make
the backend of pgsql-8.0.3 build with MSVC 6.0, and it works well.
Should I
On Fri, Sep 02, 2005 at 10:31:45AM -0400, Tom Lane wrote:
Hannu Krosing [EMAIL PROTECTED] writes:
If I get a plan like this, what will actually be performed if EXPLAIN
shows this:
Sort (cost=12.90..12.91 rows=1 width=207)
Sort Key: log_actionseq
- Index Scan using
On Fri, Sep 02, 2005 at 02:34:50PM +, Matt Miller wrote:
Rewriting all my Oracle code function-by-function could be painful
...
I'm still trying to hold on to my fantasy that I can hack Postgres (and
contrib/ora2pg) into submission.
Why don't you just use EnterpriseDB?
I
Martijn van Oosterhout kleptog@svana.org writes:
Supports any glibc platform and possibly Win32.
Adds:
SELECT ... ORDER BY expr COLLATE 'locale'
CREATE INDEX locale_index ON table(expr COLLATE 'locale')
Index scan used when COLLATE order permits
This is just a proof of concept
Alvaro Herrera [EMAIL PROTECTED] writes:
I wonder why we don't support more operators on Xid, so these things are
avoided? Right now we only have =, AFAIR.
I once started to make a btree opclass for XID, and stopped when it
occurred to me that XID comparison doesn't obey the transitive law.
Magnus Hagander [EMAIL PROTECTED] writes:
Building with the VC compiler using GNU makefiles is a whole different
story - if that can be made to work reasonably easily it would be a
worthwhile goal (in my experience, for example, the VSEE compiler
optimises things a whole lot better than gcc on
* Tom Lane ([EMAIL PROTECTED]) wrote:
This is looking a bit messy. Maybe for GRANT/REVOKE, we have to insist
that privileges do not inherit, you have to actually be SET ROLE'd to
whatever role has the authority to do the grant. I haven't figured out
how the SQL spec avoids this problem,
On R, 2005-09-02 at 10:31 -0400, Tom Lane wrote:
Hannu Krosing [EMAIL PROTECTED] writes:
If I get a plan like this, what will actually be performed if EXPLAIN
shows this:
Sort (cost=12.90..12.91 rows=1 width=207)
Sort Key: log_actionseq
- Index Scan using sl_log_1_idx2_hu,
On Fri, Sep 02, 2005 at 11:03:24AM -0400, Tom Lane wrote:
Alvaro Herrera [EMAIL PROTECTED] writes:
I wonder why we don't support more operators on Xid, so these things are
avoided? Right now we only have =, AFAIR.
I once started to make a btree opclass for XID, and stopped when it
Greg Stark [EMAIL PROTECTED] writes:
I still doesn't get where the hostility towards this functionality comes from.
We're not really willing to say here is a piece of syntax REQUIRED
BY THE SQL SPEC which we only support on some platforms. readline,
O_DIRECT, and the like are a completely
I think the main problem with switching to visual studio
project files is maintainabilty. (It's not easy to get all
I think the target should be a way to auto create those files with gmake
(maybe with mingw for configure).
The format of VS6 project and workspace files is pretty simple.
It
Hannu Krosing [EMAIL PROTECTED] writes:
On R, 2005-09-02 at 10:31 -0400, Tom Lane wrote:
Yes. However, I don't understand how you got that result; AFAIK the
planner should have eliminated the duplicate subclauses.
the query was similar to this:
[snip]
Oh, the OR arms are actually *not*
Alvaro Herrera [EMAIL PROTECTED] writes:
On Fri, Sep 02, 2005 at 11:03:24AM -0400, Tom Lane wrote:
I once started to make a btree opclass for XID, and stopped when it
occurred to me that XID comparison doesn't obey the transitive law.
Not having it does affect the planner somehow, right?
On Fri, Sep 02, 2005 at 03:04:20PM +0200, Martijn van Oosterhout wrote:
Supports any glibc platform and possibly Win32.
MacOS X [1] supports this also apparently. And for glibc it appears to
have been accepted as part of the API since 2.3.2 and formally accepted
into LSB3.0. Win32 claims to have
I looked at EnterpriseDB a few months ago. The installation errored.
It left stuff in /var/opt, which I consider non-standard for a Red Hat
machine. The whole product just didn't feel clean to me. I admit
that's a pretty limited and subjective evaluation, especially for a beta
product, but I
Martijn van Oosterhout kleptog@svana.org writes:
[1] http://www.hmug.org/man/3/newlocale.php
Hmm, the more general page seems to be
http://www.hmug.org/man/3/xlocale.php
This seems to be pretty much exactly what we want, at least API-wise.
Now, if we can find an implementation of this with a
Christopher Kings-Lynne [EMAIL PROTECTED] writes:
The EnterpriseDB guys have a final product now, and it's designed to
emulate Oracle as much as possible.
The question at hand is whether as much as possible includes having
reinvented plpgsql's execution engine ... I have not seen their
Hi everyone,
I've starting putting together a kit based on the TPC-App, which is a
business-to-business Web services workload. I'm starting to implement
it as a Java EJB and have the most of the interactions implemented with
a simple single threaded driver.
The code is available here:
On Fri, Sep 02, 2005 at 12:44:00PM -0400, Tom Lane wrote:
Hmm, the more general page seems to be
http://www.hmug.org/man/3/xlocale.php
This seems to be pretty much exactly what we want, at least API-wise.
Now, if we can find an implementation of this with a BSD license ;-) ...
Yes it
The sources can be found here:
http://darwinsource.opendarwin.org/10.4.2/Libc-391/locale/xlocale.c
The Apple License *is* necessarily compatible with the BSD License.
http://www.gnu.org/philosophy/apsl.html
On Sep 2, 2005, at 11:44 AM, Tom Lane wrote:
Martijn van Oosterhout kleptog@svana.org
[skip]
happening in the bgwriter's inner loop. Even more to the point, you
can't do such changes without getting a superexclusive lock on the
page
(not only locked, but no one else has it pinned), which is a real
nonstarter for the bgwriter, both for performance and possible
deadlock
ITAGAKI Takahiro [EMAIL PROTECTED] writes:
Don't you think about PageHeaderData?
I doubt it's really worth taking into account ... we can though.
Also I guess a floor definition is ok
because 'number of tuples' is an integer.
Right, now that I'm more awake I agree with that ;-)
Also, is
On Thu, Sep 01, 2005 at 02:59:37PM -0400, Tom Lane wrote:
Patrick Welche [EMAIL PROTECTED] writes:
I tried the fix mentioned in the earlier message to encourage
validation. Now dumping this fixed database, and loadinging it into the
new database gives:
ALTER FUNCTION
On Wed, Aug 31, 2005 at 05:56:52PM -0400, Tom Lane wrote:
I wrote:
We've had repeated problems with PL languages stemming from the fact
that pg_dump dumps them at a pretty low semantic level. Aside from this
problem with adding a validator, we used to have issues with hardwired
paths to
[EMAIL PROTECTED] (elein) writes:
On Wed, Aug 31, 2005 at 05:56:52PM -0400, Tom Lane wrote:
The basic idea is to create a shared catalog that contains procedural
language templates. This catalog would essentially replace the
knowledge that's now hardwired in the createlang program.
...
It's
elein wrote:
On Wed, Aug 31, 2005 at 05:56:52PM -0400, Tom Lane wrote:
[ interesting scheme for language handlers ]
It's a shame that we didn't think about this before feature freeze,
as the recent changes to create PL support functions in pg_catalog
have made both pg_dump and createlang
Mark,
I'd like to help out, let me know what you need help doing.
Personally, doing this with EJB's is distasteful, but I'll help where
I can.
Dave
On 2-Sep-05, at 12:53 PM, Mark Wong wrote:
Hi everyone,
I've starting putting together a kit based on the TPC-App, which is a
William ZHANG wrote:
- Original Message -
From: Dave Page dpage@vale-housing.co.uk
To: Andrew Dunstan [EMAIL PROTECTED]; William ZHANG [EMAIL
PROTECTED]
Cc: pgsql-hackers@postgresql.org
Sent: Thursday, September 01, 2005 3:21 PM
Subject: RE: [HACKERS] Call for 7.5 feature
Matt,
Seriously, though, I'm willing to devote considerable time to this.
Rewriting all my Oracle code function-by-function could be painful, and
I would end up dragging other people around this company into it. I'm
still trying to hold on to my fantasy that I can hack Postgres (and
Hi,
i'm looking for some item i can do and that have enough consensus to
make it worth the effort... :)
* Have sequence dependency track use of DEFAULT sequences, seqname.nextval?
what this means? i don't understand it...
* %Disallow changing default expression of a SERIAL column?
why? a
Hi Dave,
Oops, EJB's are distasteful? My experience in this area is quite
lacking. Not that I necessarily want to be 100% strict but the spec
says this needs to conform to WS-I BP 1.0 specification, which I
understand is basically using the SOAP transport? I just thought it
would be nice to
Tom Lane wrote:
Of course, it's fair to ask whether such a program would be any faster
than binary-mode COPY by the time you got done ... or enough faster to
justify your effort, anyway.
THe only fundamental disadvantage that COPY labors under is having to
write WAL records. It might be
Tom Lane wrote:
ITAGAKI Takahiro [EMAIL PROTECTED] writes:
I think it would be a waste to retain xmin and cmin for frozen tuples
because their values represent only 'visible for all transactions'.
True, but the hard part is getting rid of the storage for them.
I wrote a makeshift patch
Andrew Dunstan [EMAIL PROTECTED] writes:
I agree with Tom that it should not be done at this stage of beta. But
maybe we should look again at the much lower impact suggestion I made
when we moved the handlers and validators to pg_catalog, which was to
have pg_dump also do that move rather
Bruce Momjian pgman@candle.pha.pa.us writes:
Tom Lane wrote:
THe only fundamental disadvantage that COPY labors under is having to
write WAL records. It might be interesting to do something similar to
the recent hacks for CREATE TABLE AS, so that a COPY into a table just
created in the
Bruce Momjian pgman@candle.pha.pa.us writes:
Considering the cost/benefits, rather than doing some optimization for
long-lived tuples, I would like to see us merge the existing
xmin/xmax/cmin/cmax values back into three storage fields like we had in
7.4 and had to expand to a full four in 8.0
On Fri, Sep 02, 2005 at 04:02:08PM -0400, Tom Lane wrote:
Bruce Momjian pgman@candle.pha.pa.us writes:
Tom Lane wrote:
THe only fundamental disadvantage that COPY labors under is having to
write WAL records. It might be interesting to do something similar to
the recent hacks for CREATE
Tom Lane wrote:
I feel the best idea for a non-initdb-forcing solution is to hardwire
the template knowledge into CREATE LANGUAGE for 8.1 (with of course the
intention of doing my full original proposal for 8.2). With that in
place, the only messiness from loading old dumps is that you
Tom, Alvaro,
It has to be a *new* table, not an *empty* table. If it's already
visible to other xacts then somebody else could insert into it in
parallel with you, because COPY doesn't take an exclusive lock.
There's still major gains to be had, for ETL, in being able to disable
logging
People:
Bruce Momjian pgman@candle.pha.pa.us writes:
Considering the cost/benefits, rather than doing some optimization for
long-lived tuples, I would like to see us merge the existing
xmin/xmax/cmin/cmax values back into three storage fields like we had
in 7.4 and had to expand to a
Alvaro Herrera [EMAIL PROTECTED] writes:
On Fri, Sep 02, 2005 at 04:02:08PM -0400, Tom Lane wrote:
It has to be a *new* table, not an *empty* table. If it's already
visible to other xacts then somebody else could insert into it in
parallel with you, because COPY doesn't take an exclusive
On Fri, Sep 02, 2005 at 04:27:59PM -0400, Tom Lane wrote:
Alvaro Herrera [EMAIL PROTECTED] writes:
Contrariwise, it doesn't really matter (I think) if there are WAL-logged
records already in the table and COPY is adding more that aren't logged.
Only if the page is locked in a fashion
Andrew Dunstan [EMAIL PROTECTED] writes:
Tom Lane wrote:
I feel the best idea for a non-initdb-forcing solution is to hardwire
the template knowledge into CREATE LANGUAGE for 8.1 (with of course the
intention of doing my full original proposal for 8.2). With that in
place, the only messiness
AgentM wrote:
The sources can be found here:
http://darwinsource.opendarwin.org/10.4.2/Libc-391/locale/xlocale.c
The Apple License *is* necessarily compatible with the BSD License.
http://www.gnu.org/philosophy/apsl.html
Does compatibile mean our combined work is still BSD licensed?
On Fri, Sep 02, 2005 at 01:30:58PM -0700, Josh Berkus wrote:
Contrariwise, it doesn't really matter (I think) if there are WAL-logged
records already in the table and COPY is adding more that aren't logged.
(You might have to force COPY to start adding the rows on freshly added
pages ...
On Fri, Sep 02, 2005 at 01:35:42PM -0700, Josh Berkus wrote:
Bruce Momjian pgman@candle.pha.pa.us writes:
Considering the cost/benefits, rather than doing some optimization for
long-lived tuples, I would like to see us merge the existing
xmin/xmax/cmin/cmax values back into three
Jaime Casanova wrote:
Hi,
i'm looking for some item i can do and that have enough consensus to
make it worth the effort... :)
* Have sequence dependency track use of DEFAULT sequences, seqname.nextval?
what this means? i don't understand it...
The idea is to automatically add a
On Fri, 2005-09-02 at 12:29 -0700, Josh Berkus wrote:
still trying to hold on to my fantasy that I can hack Postgres (and
contrib/ora2pg) into submission.
I'm happy to work with you on ora2pg
Cool.
It looks like I should have referred to contrib/oracle, not
contrib/ora2pg, but you got my
Tom Lane wrote:
Alvaro Herrera [EMAIL PROTECTED] writes:
On Fri, Sep 02, 2005 at 04:02:08PM -0400, Tom Lane wrote:
It has to be a *new* table, not an *empty* table. If it's already
visible to other xacts then somebody else could insert into it in
parallel with you, because COPY doesn't
Alvaro Herrera [EMAIL PROTECTED] writes:
On Fri, Sep 02, 2005 at 01:35:42PM -0700, Josh Berkus wrote:
Where I do see value is in enabling index-only access for frozen tables.
That would be a *huge* gain, especially with bitmaps. I think we've
discussed this before, though.
That's a
Bruce Momjian pgman@candle.pha.pa.us writes:
Updated TODO:
o Allow COPY on a newly-created table to skip WAL logging
On crash recovery, the table involved in the COPY would
have its heap and index files truncated. One issue is
that no other backend
Tom Lane wrote:
Bruce Momjian pgman@candle.pha.pa.us writes:
Updated TODO:
o Allow COPY on a newly-created table to skip WAL logging
On crash recovery, the table involved in the COPY would
have its heap and index files truncated. One issue is
On Fri, Sep 02, 2005 at 05:18:09PM -0400, Tom Lane wrote:
Bruce Momjian pgman@candle.pha.pa.us writes:
Updated TODO:
o Allow COPY on a newly-created table to skip WAL logging
On crash recovery, the table involved in the COPY would
have its heap and index
On Fri, Sep 02, 2005 at 04:49:03PM -0400, Bruce Momjian wrote:
AgentM wrote:
The sources can be found here:
http://darwinsource.opendarwin.org/10.4.2/Libc-391/locale/xlocale.c
The Apple License *is* necessarily compatible with the BSD License.
http://www.gnu.org/philosophy/apsl.html
I have applied the following patch to output unnamed for unnamed
prepared statements. As far as your other issues, how would you want
server-side statements to be logged? statement: is a log label for a
statement. What else should we use?
Alvaro Herrera [EMAIL PROTECTED] writes:
I remember somebody mentioned some time ago that if you create a table
and then crash before ending the transaction, the tuple in pg_class is
no longer valid, but the file remains.
Right --- it will be removed on transaction rollback, but not if the
On Fri, 2 Sep 2005 15:51:15 -0400 (EDT), Bruce Momjian
pgman@candle.pha.pa.us wrote:
* Merge xmin/xmax/cmin/cmax back into three header fields
And don't forget xvac, please.
Before subtransactions, there used to be only three fields needed to
store these four
Manfred Koizar wrote:
On Fri, 2 Sep 2005 15:51:15 -0400 (EDT), Bruce Momjian
pgman@candle.pha.pa.us wrote:
* Merge xmin/xmax/cmin/cmax back into three header fields
And don't forget xvac, please.
Before subtransactions, there used to be only three fields needed to
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