On Thu, 29 Jan 2009 13:16:17 +
Gregory Stark wrote:
> So, what do people say? Is Postgres perfect in your world or does it
> do some things which rub you the wrong way?
I see all the major ones have already been mentioned, so here's some
minor ones.
- lack of system-level and DDL triggers
On Sat, Jan 31, 2009 at 3:16 PM, Andreas Wenk
wrote:
> Why does this not work:
>
> postgres=# ALTER TABLE tab1 ALTER COLUMN nr TYPE serial;
> ERROR: type "serial" does not exist
serial is really just "short-hand" for making an integer column use
default incrementing function. The following wil
My two:
* lack of PK/unique indexes on inherited tables (workarounds possible
but annoying)
* lack of auto-tuning or tuning tools (or perhaps my lack of awareness
of them?)
-Reece
--
Reece Hart, http://harts.net/reece/, GPG:0x25EC91A0
On 2009-01-31, Andreas Wenk wrote:
> Hi List,
>
> I have a short question to psql.
>
> Why does this not work:
>
> postgres=# ALTER TABLE tab1 ALTER COLUMN nr TYPE serial;
> ERROR: type "serial" does not exist
>
> but this:
>
> postgres=# ALTER TABLE tab1 DROP COLUMN nr;
> ALTER TABLE
> postgres=
On 2009-01-28, Abdul Rahman wrote:
> --0-2110834523-1233119974=:72728
> Content-Type: text/plain; charset=us-ascii
>
> Dear All,
>
> Yesterday I canceled a running query because it was taking long time
> (more than 12 minutes) to delete lots of records. Today when I
> executed the same query it ha
On 2009-01-27, Alban Hertroys wrote:
> On Jan 25, 2009, at 3:07 AM, Jasen Betts wrote:
>
>>> I want to use this column as a foreign key on a column in another
>>> table
>>> (column 2), but cannot without a full unique index.
>>
>> a full unique index is easy use an expression that's null for -1.
On Sat, Jan 31, 2009 at 1:33 PM, Gregory Stark wrote:
> No index is going to be particularly effective for boolean columns unless
> they're very heavily skewed. You might find it useful to build separate
> partial indexes on other keys for each value though.
Not entirely true. If you've got a ta
Gregory Stark wrote:
Mohamed writes:
I want to match against a boolean field, that is, only true or false is
possible. I am thinking Btree but not sure.. correct?
No index is going to be particularly effective for boolean columns unless
they're very heavily skewed. You might find it
On Sat, 2009-01-31 at 23:36 +, Gregory Stark wrote:
> Octavio Alvarez writes:
>
> > A crosstab is not but a presentational transform of the data set. Any
> > information you would eventually need can be taken from the original
> > data source, one way or another. That's why dynamic-column cro
Octavio Alvarez writes:
> In any case, the results are the same as GROUPing BY from the data
> source.
> +-+-+
> | Assignment | Average |
> +-+-+
> | Assignment1 | 94.67 |
> | Assignment2 | 90.33 |
> | Assignment3 | 86.67 |
> +-+-
Hi List,
I have a short question to psql.
Why does this not work:
postgres=# ALTER TABLE tab1 ALTER COLUMN nr TYPE serial;
ERROR: type "serial" does not exist
but this:
postgres=# ALTER TABLE tab1 DROP COLUMN nr;
ALTER TABLE
postgres=# ALTER TABLE tab1 ADD COLUMN nr serial;
NOTICE: ALTER TA
On Sat, 2009-01-31 at 18:32 +, Greg Stark wrote:
> On Sat, Jan 31, 2009 at 5:34 PM, Octavio Alvarez
> wrote:
> >
> > It doesn't really matter. Since crosstabs are just a presentational
> > variation to a query with aggregate functions and GROUP BY clauses,
>
>
> Why are crosstabs just a pres
Mohamed writes:
> Hi,
> I have several fields that use to match with my queries. I am curious to
> what index types is best for what. Here is some examples that will help you
> understand.
>
> Say I have a 1000 000 rows.
>
> Speed is of the essence here, insertions and updates happens relatively
On Sat, Jan 31, 2009 at 11:10 AM, rhubbell wrote:
> Thanks, using the same apt commands, try to find pg_config.
> (^;
It's easy:
/home/smarlowe$ pg_config
The program 'pg_config' is currently not installed. You can install
it by typing:
sudo apt-get install libpq-dev
bash: pg_config: command no
On 2009-01-30, Steve Crawford wrote:
>
>> You can however pull it from a -Fc backup with pg_restore. Just FYI.
>>
>> Joshua D. Drake
>>
>
> Or strip it from a pg_dump/pg_dumpall with sed. Or write your own
> function-dumper based on ideas gleaned from various notes/comments on
> the web (my a
Hi,
I have several fields that use to match with my queries. I am curious to
what index types is best for what. Here is some examples that will help you
understand.
Say I have a 1000 000 rows.
Speed is of the essence here, insertions and updates happens relatively less
frequent than search.
I wa
On 2009-01-29, Steve Crawford wrote:
>
>>> 3. Date handling
>>> Sometimes I've got data with invalid dates and it would be great if it
>>> could replace all the bad ones with, say "-00-00".
>>>
-00-00 doesn't fit in a date column.
perhaps you could use null?
write a function tha
On 2009-01-29, sanjeev kumar wrote:
> --000e0cd150b60728d804619c963d
> Content-Type: text/plain; charset=ISO-8859-1
> Content-Transfer-Encoding: 7bit
>
> Hi all,
>
> I have written procedure as follows:
> -
> --procedure begin
> Create Proced
On Sat, Jan 31, 2009 at 5:34 PM, Octavio Alvarez
wrote:
>
> It doesn't really matter. Since crosstabs are just a presentational
> variation to a query with aggregate functions and GROUP BY clauses,
Why are crosstabs just a presentation issue any more than GROUP BY or ORDER BY?
--
greg
--
Sen
On Sat, Jan 31, 2009 at 6:10 PM, rhubbell wrote:
> Thanks, using the same apt commands, try to find pg_config
$ apt-file search bin/pg_config
libpq-dev: /usr/bin/pg_config
postgresql-server-dev-8.3: /usr/lib/postgresql/8.3/bin/pg_config
That is confusing actually.
However, the readme for DBD::P
On Sat, Jan 31, 2009 at 10:10:01AM -0800, rhubbell wrote:
> Thanks, using the same apt commands, try to find pg_config.
Well, those commands search package names and metadata (including
descriptions), and pg_config isn't mentioned so you won't find
anything. Given that pg_config matches the versi
Thanks, using the same apt commands, try to find pg_config.
(^;
On Sat, 31 Jan 2009 12:38:18 +
Roger Leigh wrote:
> On Fri, Jan 30, 2009 at 03:44:48PM -0800, rhubbell wrote:
> > On Fri, 30 Jan 2009 20:38:06 +
> > Gregory Stark wrote:
> >
> > >
> > > rhubbell writes:
> > >
> > > >
On Sat, Jan 31, 2009 at 2:13 AM, Erik Jones wrote:
>
> On Jan 30, 2009, at 11:37 AM, durumdara wrote:
>> - I can add/modify a table, or a field to a table without "full lock" on
>> the table (like DBISAM restructure). Like in FireBird, where the "add field"
>> change only the table description.
On Fri, 2009-01-30 at 14:25 +, Gregory Stark wrote:
> "Daniel Verite" writes:
>
> > Gregory Stark wrote:
> >
> >> Is it the hierarchical query ability you're looking for or pivot?
> >> The former we are actually getting in 8.4.
> >>
> >> AFAIK even in systems with pivot you still have to
On Sat, 31 Jan 2009 15:28:31 +0100, Martijn van Oosterhout wrote:
> Nicest would be ofcourse a niceness level, so that VACUUM slows itself
> down according to the amount of queries going on (to a minimum ofcourse).
Linux has IO priority support for this, see ionice. Starting with 2.6.28
the CFQ s
Gregory Stark wrote:
MS-Access SQL has a TRANSFORM clause that allows for crosstab queries without
the need to know in advance the number of columns:
http://msdn.microsoft.com/en-us/library/bb208956.aspx
That's puzzling. I wonder what they do about clients requesting info about the
results. Or
On Fri, Jan 30, 2009 at 02:43:13PM -0800, Ron Mayer wrote:
> I guess I'd still like some more convenient tuning of autovacuum (perhaps
> specifying X mbps disk I/O); but I'd say vacuum fell off my pet-peeve list
> around the 8.1 timeframe.
ah yes, that reminds me. If I know what my disk subsystem
Hello,
is it possible to get the old value of an update, something like this:
INSERT INTO my_table (col) VALUES (2);
UPDATE my_table SET col = 4 RETURNING old.col;
Should give me the 2.
Regards,
Gerhard
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On Fri, Jan 30, 2009 at 03:44:48PM -0800, rhubbell wrote:
> On Fri, 30 Jan 2009 20:38:06 +
> Gregory Stark wrote:
>
> >
> > rhubbell writes:
> >
> > > Nope, had to find it in another package called libpq-dev.
> > > That's on UbuntuHardy. Maybe it's a maintainer problem?
> > >
> > > What lo
On 2009-01-30, Grzegorz Jaśkiewicz wrote:
> Hey folks,
>
> I wonder, how would you guys approach table snapshots.
> So the thing is, I have table X (I have few more tables, but lets
> simplify that). That table is being replicated to X' on other server.
> Now I need an ability to see changes, say
On 2009-01-29, Mike Diehl wrote:
> Hi all.
>
> I've encountered an SQL problem that I think is beyond my skills...
>
> I've got a table full of records relating to events (phone calls, in
> this case) and I need to find the largest number of events (calls)
> occurring at the same time.
one time w
rhubbell writes:
>> Installing a package for DBD::Pg or building it? The former would indeed be a
>> package bug.
>
> When I installed the package I did via CPAN so maybe this was my mistake.
> Not every CPAN package is packaged for debian so I often times don't bother
> checking if a perl module
On Jan 30, 2009, at 11:37 AM, durumdara wrote:
The main viewpoints:
- quick (re)connect - because mod_python basically not store the
database connections persistently
mod_python is not a database adaptor. Put another way, mod_python
does not make database connections. If you're using P
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