Tom,
finally I tried with only this option CC=icc,
as there is an another error (error: Could not open %files file
/home/postdev/BUILD/postgresql-8.1.1/debugfiles.list),
I dont know where this debugfiles.list coming from.
I prefered to stop for now , I'll will try later,
so I have used gcc and
On Jan 26, 2006, at 15:17 , Chris Velevitch wrote:
I'm want to write a query to list definitions of all the fields in my
tables and which table it belongs to. And similarly for views and
tables.
This is so I can check for table and column name consistency, extra
tables and column type consiste
I'm want to write a query to list definitions of all the fields in my
tables and which table it belongs to. And similarly for views and
tables.
This is so I can check for table and column name consistency, extra
tables and column type consistency.
Chris
--
Chris Velevitch
Manager - Sydney Flash
On Wed, Jan 25, 2006 at 02:47:45PM -0800, Patrick Hatcher wrote:
> Would I gain any advantage by changing to it to fire after the insert?
If you're modifying the row then the trigger must fire before the
insert. An after trigger can abort the operation by raising an
error and it can perform actio
That earlier e-mail won't do anyone much good with out the link to the site.
Sorry. That's what happens when I work late in the middle of the week.
Link: http://www.bluwiki.org/go/PostgreSQL_Tips_From_The_Sunburned_Surveyor
Scott Huey
On 1/25/06, Redefined Horizons <[EMAIL PROTECTED]> wrote:
>
I have started a wiki site for the PostgreSQL newbie. I'm actually a
noob myself, but I thought I would take the time to document my
mistakes and also provide some tips that I hope will help others.
I welcome suggestions and correcions from more experience PostgreSQL
and pgAdmin 3 users. I hope th
> > Why is there so much free space with no dead tuples? This table has
> > likely had serveral columns added over time, is that part of the problem?
> > Indexes?
>
> An ordinary vacuum frees space for PostgreSQL's use but it doesn't
> shrink the table's file(s) and return space to the operating
On Wed, Jan 25, 2006 at 03:40:38PM -0800, Michael Crozier wrote:
> Why is there so much free space with no dead tuples? This table has likely
> had serveral columns added over time, is that part of the problem? Indexes?
An ordinary vacuum frees space for PostgreSQL's use but it doesn't
shrink th
Not sure what the correct forum for pgxml/xml2 questions is. I was
wondering what is the definition of "valid" that the xml_valid(text)
function that is part of that module uses? It seems different from the
W3C definition of "valid" XML (is there an implicit DTD?) Maybe it is
more akin to "well-for
I ran across http://www.vldb.org/conf/2004/DEMP14.PDF while googling for
something else; I haven't seen this before so I thought I'd post it.
Anyone dealing with XML data should take a look, though it might have
other uses too.
--
Jim C. Nasby, Sr. Engineering Consultant [EMAIL PROTECTED]
Per
Hi,
I have an aging 7.3 database on Solaris 9/Sparc. We are on the verge of
upgrading Postgresql, but we first need to reclaim some disk space. I was
looking for tables that may have become fragmented when I saw this
pgstattuple output that confused me:
table_len 21773516800
tu
Would I gain any advantage by changing to it to fire after the insert?
thanks again for the help
Patrick Hatcher
Development Manager Analytics/MIO
Macys.com
415-422-1610
Doug McNaught
why not just use setval(), see docs for arguments.
-- Original Message ---
From: Philippe Ferreira <[EMAIL PROTECTED]>
To: pgsql-general@postgresql.org
Sent: Wed, 25 Jan 2006 22:11:11 +0100
Subject: Re: [GENERAL] My very first PL/pgSQL procedure...
> Hi,
>
> The only solution I'
Patrick Hatcher <[EMAIL PROTECTED]> writes:
> Here is the trigger the way it is currently written. I add some additional
> information from another table:
If you're modifying each row before it goes in, it should definitely
be a FOR EACH ROW trigger.
-Doug
---(end of br
Hello Ben,
Unless I am wrong there is a set of RPMs available via the PostgreSQL site for
8.1.1/2 http://www.postgresql.org/ftp/binary/v8.1.2/linux/rpms/
Aly.
Benjamin Smith wrote:
Version: postgresql-8.1.0-4.c4
I'll have to see about getting an update...
Thanks a TON,
-Ben
andrew <[EMAIL PROTECTED]> writes:
> Sorry, I modified the parser code and forgot abt it. Now there is no
> problem in creating the function. But there is another problem. I
> create a function to accept record type parameter. But when I call it
> on a specific composite type, error is reported. Th
Version: postgresql-8.1.0-4.c4
I'll have to see about getting an update...
Thanks a TON,
-Ben
On Wednesday 25 January 2006 13:11, you wrote:
> Benjamin Smith <[EMAIL PROTECTED]> writes:
> > Aha, yep. Sorry:
> > Program received signal SIGSEGV, Segmentation fault.
> > 0x0043c82c in h
Benjamin Smith <[EMAIL PROTECTED]> writes:
> Aha, yep. Sorry:
> Program received signal SIGSEGV, Segmentation fault.
> 0x0043c82c in heap_modifytuple ()
> (gdb) bt
> #0 0x0043c82c in heap_modifytuple ()
> #1 0x0043c8f5 in slot_getattr ()
> #2 0x0047a50a in FormIn
Hi,
The only solution I've found to get the same reliable result, but
without locking, is the dirty way (loops) :
-
CREATE OR REPLACE FUNCTION seq_min(sequence_name varchar, minva
Here is the trigger the way it is currently written. I add some additional
information from another table:
CREATE TRIGGER item_cost_trig
BEFORE INSERT
ON cdm.cdm_ddw_tran_item
FOR EACH ROW
EXECUTE PROCEDURE cdm.insert_cost_to_tranitem_sub();
CREATE OR REPLACE FUNCTION cdm.insert_cost_to_
Tom,
Since we host customer data, I have to get OK from the company attorney before
I can give you a full "howto create". I've been unable to recreate it without
a full database dump. I'm waiting for a call back on that. I also can't
recreate it on IA32.
I tried to replicate the issue on a u
Patrick Hatcher <[EMAIL PROTECTED]> writes:
> Attempting to do my first trigger and I'm confused about which FOR EACH I
> should use: ROW or STATEMENT. I import about 80K rows into an existing
> table each day. If I do a STATEMENT, will the changes only happen on the
> new 80K rows I inserted or
Benjamin Smith <[EMAIL PROTECTED]> writes:
> OK, here's the output:
> (gdb) continue
> Continuing.
> Program received signal SIGSEGV, Segmentation fault.
> 0x0043c82c in heap_modifytuple ()
> (gdb)
> // not very hopeful, I'd think //
You forgot the
Stephen Frost <[EMAIL PROTECTED]> writes:
> * Tom Lane ([EMAIL PROTECTED]) wrote:
>> ps auxww | grep postgres:
>> ... eyeball determination of correct PID ...
> You can also do 'select pg_backend_pid();' from psql... I know that's
> there on 8.1, though I recall this was an 8.0 discussion and I *
OK, here's the output:
(gdb) continue
Continuing.
Program received signal SIGSEGV, Segmentation fault.
0x0043c82c in heap_modifytuple ()
(gdb)
// not very hopeful, I'd think //
Can I get a RHES/CENTOS PG 8.1 RPM with the symbols enabled? Unfortuna
On Wed, Jan 25, 2006 at 10:51:23AM -0800, [EMAIL PROTECTED] wrote:
> I am in version 7.3 and it will not let me cast, I get message "ERROR:
> Cannot cast type boolean to integer". I will save this for when I upgrade.
You can create casts with CREATE CAST.
http://www.postgresql.org/docs/7.3/stati
>Martijn van Oosterhout
wrote on 01/25/2006 10:20:40 AM:
> On Wed, Jan 25, 2006 at 09:55:58AM -0800, [EMAIL PROTECTED]
wrote:
>
> Parhaps something like:
>
> CHECK((CASE WHEN evenid1 IS NOT NULL THEN 1 ELSE 0 END) +
> (CASE WHEN evenid2 IS NOT NULL THEN 1 ELSE 0
END) +
> (CASE WHEN
Attempting to do my first trigger and I'm confused about which FOR EACH I
should use: ROW or STATEMENT. I import about 80K rows into an existing
table each day. If I do a STATEMENT, will the changes only happen on the
new 80K rows I inserted or will it be for all rows in the table - currently
ab
>Michael Fuhr <[EMAIL PROTECTED]> wrote on 01/25/2006
10:25:38 AM:
> In 8.1, and in earlier versions if you create a cast from boolean
> to integer, you could do this:
>
> ALTER TABLE event
> ADD CONSTRAINT two_nulls_1 CHECK (
> (evenid1 IS NOT NULL)::int +
> (evevid1 IS NOT NULL)::int +
> (evrei
you need to use EXECUTE to do the dynamic lock table.
sql = 'LOCK TABLE ' || sequence_name || 'IN ACCESS EXCLUSIVE MODE';
EXECUTE sql;
Thank you for your help ;-)
I've been able to rewrite my procedure as follows :
---
On Wed, Jan 25, 2006 at 09:55:58AM -0800, [EMAIL PROTECTED] wrote:
> You are correct, in each group of three columns, one needs to have an
> integer and the other two need to be NULL. So I need to modify the
> constraint to be
>
> ALTER TABLE event
> ADD CONSTRAINT two_nulls_1 CHECK
> ((eve
On Wed, Jan 25, 2006 at 09:55:58AM -0800, [EMAIL PROTECTED] wrote:
> ALTER TABLE event
> ADD CONSTRAINT two_nulls_1 CHECK
> ((evenid1 IS NULL) AND (evevid1 IS NULL) and (evreid1 IS NOT NULL)) OR
> ((evenid1 IS NULL) AND (evevid1 IS NOT NULL) and (evreid1 IS NULL)) OR
> ((evenid1 IS NOT NULL) AND (
Ok, I decided to upgrade my postgress version to 8.1, I am using a
win32 distribution, where can I find the xml2 extension? I got the
pgxml distribution from http://www.u-moe.org/pgxml/ and I followed all
tips from George
• From: George Weaver
• To: pgsql-novice ( at ) postgresql
you need to use EXECUTE to do the dynamic lock table.
sql = 'LOCK TABLE ' || sequence_name || 'IN ACCESS EXCLUSIVE MODE';
EXECUTE sql;
-- Original Message ---
From: Philippe Ferreira <[EMAIL PROTECTED]>
To: pgsql-general@postgresql.org
Sent: Wed, 25 Jan 2006 18:37:21 +0100
Subje
sorry, mistakenly leave out another try:
backend> select *, complete(CAST (Person AS record)) from Person
QUERY: select *, complete(CAST (Person AS record)) from Person
ERROR: Relation reference "person" cannot be used in an expression
On 1/25/06, andrew <[EMAIL PROTECTED]> wrote:
> Sorry, I mo
I want to use a UDF to filter tuples t that are generated after a join.
More specifially, I have a UDF foo(record), which computes a value for
a given tuple. I can do the filtering before the join. e.g.:
select * from A, B where foo(A)<2 and A.a=B.b;
But I want to apply foo() to the tuples gener
>Michael Fuhr
wrote:
> ALTER TABLE event
> ADD CONSTRAINT two_nulls_1 CHECK (evenid1 IS NULL) AND (evevid1
IS
> NULL)) OR ((evevid1 IS NULL) AND (evreid1 IS NULL))) OR ((evenid1
IS NULL)
> AND (evreid1 IS NULL;
>
>Is there a requirement that exactly one column
be NOT NULL? If so
>then
* Tom Lane ([EMAIL PROTECTED]) wrote:
> Benjamin Smith <[EMAIL PROTECTED]> writes:
> > What's the best way to do this? Take PG down (normally started as a
> > service)
> > and run directly in a single-user mode?
>
> No, just start a psql session in one window, then in another window
> determine
On Wed, Jan 25, 2006 at 11:26:39AM -0500, Tom Lane wrote:
> "Ilja Golshtein" <[EMAIL PROTECTED]> writes:
> > postgres=# create table ddd(f1 int4);
> > CREATE TABLE
> > postgres=# drop table ddd;
> > ERROR: "ddd" is not a table
>
> That's just plain bizarre. Would you try it with \set VERBOSITY v
Sorry, I modified the parser code and forgot abt it. Now there is no
problem in creating the function. But there is another problem. I
create a function to accept record type parameter. But when I call it
on a specific composite type, error is reported. The followings are
what I have done:
backend
Hi,
I've got a problem with my very first PL/pgSQL procedure !
I created the following procedure, that should reconfigure a sequence :
-
CREATE OR REPLACE FUNCTION seq_min(sequenc
On Wed, Jan 25, 2006 at 08:39:00AM -0800, [EMAIL PROTECTED] wrote:
> I have taken your suggestion and changed the values to NULL for the empty
> foreign keys. Thank you for the constraint. I modified it to check for
> NULL and it works great.
>
> ALTER TABLE event
> ADD CONSTRAINT two_nulls_1
andrew <[EMAIL PROTECTED]> writes:
> ERROR: parser: parse error at or near "record" at character 21
> in Warn_restart code
> What is the problem here? Did you test it on 7.3?
Yeah, 7.3.13 to be exact. (There have been a couple of changes in the
parser in the 7.3 branch, according to the CVS log
The following is just copied from the screen.
backend> create function foo(record) returns int4 as '$libdir/bar' language C
QUERY: create function foo(record) returns int4 as '$libdir/bar' language C
ERROR: parser: parse error at or near "record" at character 21
in Warn_restart code
What is the
Robert Korteweg <[EMAIL PROTECTED]> writes:
> I have a problem with a database i'm maintaining. I first noticed the
> problem because i could not make a backup of the database i got the
> following error:
> pg_dump: missing pg_database entry for database "xxx"
> I verified this by selecting the
Richard,
I have taken your suggestion and changed
the values to NULL for the empty foreign keys. Thank you for the constraint.
I modified it to check for NULL and it works great.
ALTER TABLE event
ADD CONSTRAINT two_nulls_1 CHECK
(evenid1 IS NULL) AND (evevid1 IS NULL)) OR ((evevid1 IS NUL
andrew <[EMAIL PROTECTED]> writes:
> I use 7.3 and use RECORD as the input data type of the function by
> "create function foo(record) returns int4 as '$libdir/bar' language
> C". But I got this error msg:" ERROR: parser: parse error at or near
> "record" at character". What is the problem?
Sur
"Ilja Golshtein" <[EMAIL PROTECTED]> writes:
> postgres=# create table ddd(f1 int4);
> CREATE TABLE
> postgres=# drop table ddd;
> ERROR: "ddd" is not a table
That's just plain bizarre. Would you try it with \set VERBOSITY verbose
so we can see exactly where the error is coming from?
Has this i
On Wednesday 25 January 2006 17:01, Martijn van Oosterhout wrote:
>Anyone know any other non-text based clients?
I'm using PHP with plain old HTML forms. That way, I can slap together a
custom interface in no time. And it even works in links2 :)
--
Leif Biberg Kristensen | Registered Linux User
On 1/25/06, Tom Lane <[EMAIL PROTECTED]> wrote:
> Jaime Casanova <[EMAIL PROTECTED]> writes:
> > On 1/25/06, James Croft <[EMAIL PROTECTED]> wrote:
> >> How can I determine if one of the above relations is a temporary
> >> table in the current session (one of them, the first in ns 2200, is a
> >> n
On Tue, 2006-01-24 at 21:34, Tom Lane wrote:
> "[EMAIL PROTECTED]" <[EMAIL PROTECTED]> writes:
> > I’ am looking for pgxml module for postgres 7.2.1, someone can help me
> > to find it?
>
> *Please* tell me you are not still using PG 7.2.1.
>
> There are seven subsequent releases in the 7.2 seri
On Wed, Jan 25, 2006 at 11:42:04AM +0100, H.J. Sanders wrote:
> When I do this I get the message
>
> relation pgstattuple does not exist.
pgstattuple is a function, not a relation, so I suspect the query
isn't referring to it correctly. What's the exact query you ran?
It should look like this:
Jaime Casanova <[EMAIL PROTECTED]> writes:
> On 1/25/06, James Croft <[EMAIL PROTECTED]> wrote:
>> How can I determine if one of the above relations is a temporary
>> table in the current session (one of them, the first in ns 2200, is a
>> normal permanent table)?
> SELECT n.nspname as "Schema", c
On Wed, Jan 25, 2006 at 04:43:18PM +0100, Michelle Konzack wrote:
> Hello,
>
> I am using PostgreSQL since more then 6 years now and for 1 1/2 years
> "rekall". Now there is a problem with the crapy QT and I have no
> Frontend anymore which works WITHOUT (!!!) KDE or GNOME which I hate!
You mean
Michelle Konzack wrote:
> Does anyone know a Frontend for PostgreSQL which I can use to design
> and admin a very huge Database
OpenOffice 2?
--
Peter Eisentraut
http://developer.postgresql.org/~petere/
---(end of broadcast)---
TIP 2: Don't 'kill
Benjamin Smith <[EMAIL PROTECTED]> writes:
> What's the best way to do this? Take PG down (normally started as a service)
> and run directly in a single-user mode?
No, just start a psql session in one window, then in another window
determine the PID of the backend process it's connected to, and
Hello,
I am using PostgreSQL since more then 6 years now and for 1 1/2 years
"rekall". Now there is a problem with the crapy QT and I have no
Frontend anymore which works WITHOUT (!!!) KDE or GNOME which I hate!
Currently I am using "pgAccess" to check my PostgreSQL but it is very
limited.
Does
On 1/25/06, James Croft <[EMAIL PROTECTED]> wrote:
>
> On 25 Jan 2006, at 14:17, Jaime Casanova wrote:
>
> >> How can I determine what temporary tables exist in my session,
> >> bearing in mind that other sessions contain temp tables using the
> >> same names?
> >>
> >
> > just the ones you have cr
Hi,
I have a problem with a database i'm maintaining. I first noticed the
problem because i could not make a backup of the database i got the
following error:
pg_dump: missing pg_database entry for database "xxx"
I verified this by selecting the pg_database. It was indeed gone.
I did some m
Kleynhans, Hendrik wrote:
___
“The information contained in this e-mail is confidential and may contain
proprietary information.
It is meant solely for the intended recipient. Access to this e-mail
On 25 Jan 2006, at 14:17, Jaime Casanova wrote:
How can I determine what temporary tables exist in my session,
bearing in mind that other sessions contain temp tables using the
same names?
just the ones you have created in your session, temporary tables in
other sessions are invisible to you
I use 7.3 and use RECORD as the input data type of the function by
"create function foo(record) returns int4 as '$libdir/bar' language
C". But I got this error msg:" ERROR: parser: parse error at or near
"record" at character". What is the problem? I look up the 7.3
manual. it seems record is a
> How can I determine what temporary tables exist in my session,
> bearing in mind that other sessions contain temp tables using the
> same names?
>
just the ones you have created in your session, temporary tables in
other sessions are invisible to you...
--
regards,
Jaime Casanova
(DBA: DataBase
Hi,
I am going to integrate my dtabase into a system.
That system also has another database and uses postgres.
However they have their own data directory and
start postmaster by specifying that.
I have seen that it is possible to run multiple
postmasters on multiple ports by specifying di
Title: Re: [GENERAL] FATAL: terminating connection due to administrator command
is it also possible
that someone was doing an operation on the database for instance inserting manyr
rows
and suddenly a command to stop the
postmaster arrived?
thanks,
regards
Surabhi
From: Tom Lane
[ma
Hi,
How the tsearch2 work?
I can use it in my project that is language Português (Brasil)?
Thanks.
Marcos.
---(end of broadcast)---
TIP 1: if posting/reading through Usenet, please send an appropriate
subscribe-nomail command to [EMAIL PR
Andrew Maclean napisał(a):
I can't agree more.
-Original Message-
From: Bruce Momjian [mailto:[EMAIL PROTECTED]
Sent: Wednesday, 25 January 2006 15:16
To: Tony Caduto
Cc: Magnus Hagander; Dave Page; pgsql-general@postgresql.org
Subject: Re: Does this look ethical to you?
The people
Hello!
Could you please help me with an issue I have on a PG installation.
The problem is it is impossible to drop any table.
Looks like this.
==
[EMAIL PROTECTED] bin]$ ./psql postgres ilejn
Welcome to psql 8.1.1, the PostgreSQL interactive terminal.
Type: \copyright for distribution terms
I can't agree more.
-Original Message-
From: Bruce Momjian [mailto:[EMAIL PROTECTED]
Sent: Wednesday, 25 January 2006 15:16
To: Tony Caduto
Cc: Magnus Hagander; Dave Page; pgsql-general@postgresql.org
Subject: Re: Does this look ethical to you?
The people who develop, package, and host
Hi all,
I've had a look at through the list archives but haven't found an
answer to this one. Any suggestions appreciated (aside from ones
suggesting that I should not need to do this ;-)...
- A normal table foo is created in a database.
- Clients connect to the database, some create a tem
Andrew - Supernews wrote:
On 2006-01-24, Will Glynn <[EMAIL PROTECTED]> wrote:
You might try:
SELECT some_column
FROM some_table
GROUP BY some_column
HAVING SUM(CASE WHEN sort_order=1 THEN 1 ELSE 0 END) = 0;
SELECT some_column
FROM some_table
GROUP BY some_column
HAVING every(sort_ord
Hi,
On Wed, 2006-01-25 at 12:40 +0300, Sergey Karin wrote:
> We create database cluster (via initdb) on some disk. Then we create
> and use a database that can be very large. In some moment the database
> occupy all disk space allicated to cluster.
> The question is: are there any abilities in Po
On Jan 25, 2006, at 18:43 , Kleynhans, Hendrik wrote:
If I am looking to access large amounts of data, such as in a data
center, would it be better to run a/several database servers and
accessing them across the network?
If you want *access* (i.e., select only, not modifying data), you
migh
Kleynhans, Hendrik wrote:
Hi Richard,
: Are you:
: 1. Looking to spread disk-accesses over several machines, or
: 2. Looking to run multiple PostgreSQL server against the same
: database?
:
: You might be ok with #1, but not #2.
Thanks for the quick response.
I am looking at #2, but I cou
Sergey Karin wrote:
Hi, List!
Lets suppose the next situation...
We create database cluster (via initdb) on some disk. Then we create and use
a database that can be very large. In some moment the database occupy all
disk space allicated to cluster.
The question is: are there any abilities in Po
Hi Richard,
: Are you:
: 1. Looking to spread disk-accesses over several machines, or
: 2. Looking to run multiple PostgreSQL server against the same
: database?
:
: You might be ok with #1, but not #2.
Thanks for the quick response.
I am looking at #2, but I could not find anything from my s
On Wed, Jan 25, 2006 at 12:40:36PM +0300, Sergey Karin wrote:
> Hi, List!
>
> Lets suppose the next situation...
>
> We create database cluster (via initdb) on some disk. Then we create and use
> a database that can be very large. In some moment the database occupy all
> disk space allicated to c
Hi, List!
Lets suppose the next situation...
We create database cluster (via initdb) on some disk. Then we create
and use a database that can be very large. In some moment the database
occupy all disk space allicated to cluster.
The question is: are there any abilities in PostgreSQL to use for
c
George Pavlov wrote:
This is actually turning into a bit of a pgAdmin issue: pgAdmin lets you
export data in a format that seems to be unimportable back into the same
table. If in the "Export data to file" form you check "all columns"
under "Quoting" you will get quotes around your numeric NULLs
Kleynhans, Hendrik wrote:
Hi there,
Does anyone know if it is possible to share a single database across
multiple machines each running a database server using OCFS2?
Are you:
1. Looking to spread disk-accesses over several machines, or
2. Looking to run multiple PostgreSQL server against the
[EMAIL PROTECTED] wrote:
I have a table that I am using to hold keys for M:M relationships. I
have six fields that can hold the keys and I do this because I validate
the key with a foreign key constraint. Fields evevid1, evevid2 hold keys
from the event table, evreid1, evreid2 hold keys from
Hi, Akilesh,
AKHILESH GUPTA wrote:
> i am new to this mailing list. this is my first mail to this group.
> i jussst want to confirm that whether is it possible to update a view or
> not??
> i think you all help me in solving my queries in future...!!
Do you think about issuing UP
AKHILESH GUPTA wrote:
hello everybody
i am new to this mailing list. this is my first mail to this group.
i jussst want to confirm that whether is it possible to update a view or
not??
There is no automatic updating of views at present.
You can write your own RULES though to do updates - see t
Carl Conard wrote:
Connections are through localhost. We've also connected via a client
machine through a router to insure it is not something on the server.
No, I meant what client library: odbc, jdbc .net libpq?
By drop connections, I mean Task Manager is showing additional
postgres.exe
Hi there,
Does anyone know if it is possible to share a single database across
multiple machines each running a database server using OCFS2?
Thanks in advance,
Kind regards,
Henry
___
The informati
Thank you for the answer!
Sure, the possiblity of having a separate column for each flag was
considered, but a common columnn is preferred -- I do not remember
exactly why. (I do not directly make that decision.) I guess the main
reason is that adding new columns to the table complicates the u
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