On 6 September 2013 01:00, Janek Sendrowski jane...@web.de wrote:
Hi,
I'm searching for an optimized Levenshtein Distance like Postgresql's. My
problem is that I want to compare strings with a length over 255 characters.
Does anyone know a solution?
Janek Sendrowski
Hi,
I'm not sure
Szymon Guz mabew...@gmail.com writes:
On 6 September 2013 01:00, Janek Sendrowski jane...@web.de wrote:
I'm searching for an optimized Levenshtein Distance like Postgresql's. My
problem is that I want to compare strings with a length over 255 characters.
Does anyone know a solution?
I'm not
ascot.m...@gmail.com wrote:
I am planing to backup archived WAL files from master to another machine, is
there a way to check and
make sure the backup archive file are all good and no any file missing or
corrupted?
The only 100% safe way would be to restore them, e.g. with
a standby
On 6 September 2013 08:47, Tom Lane t...@sss.pgh.pa.us wrote:
Szymon Guz mabew...@gmail.com writes:
On 6 September 2013 01:00, Janek Sendrowski jane...@web.de wrote:
I'm searching for an optimized Levenshtein Distance like Postgresql's.
My
problem is that I want to compare strings with a
2013-09-06 02:57 keltezéssel, Wang, Jing írta:
Hi,
ECPG don't support the following scenario:
char cur_name = cur1;
EXEC SQL DECLARE :cur_name CURSOR FOR ...
EXEC SQL OPEN :cur_name;
EXEC SQL FETCH cur1 INTO...
...
EXEC SQL CLOSE :cur_name;
An compile error will occur for above codes
Hi,
why isn't 'aa' always treated as string?
While testing function for levenshtein distance I've noticed that:
with x as (
select
'1' a,
'2' b
)
SELECT levenshtein(a, b), length(a)
FROM x;
ERROR: failed to find conversion function from unknown to text
with x as (
select
'1'::TEXT
On 06/09/13 09:13, Szymon Guz wrote:
Hi,
why isn't 'aa' always treated as string?
with x as (
select
'1' a,
'2' b
)
SELECT levenshtein(a, b), length(a)
FROM x;
ERROR: failed to find conversion function from unknown to text
Why should I cast '1' to '1'::TEXT to satisfy a function
On 6 September 2013 10:33, Richard Huxton d...@archonet.com wrote:
On 06/09/13 09:13, Szymon Guz wrote:
Hi,
why isn't 'aa' always treated as string?
with x as (
select
'1' a,
'2' b
)
SELECT levenshtein(a, b), length(a)
FROM x;
ERROR: failed to find conversion function
Hello:
Sorry for disturbing again.
Some of my friends told me about cgroups, So I tried it first.
I found that cgroups can work for task such as wget.
But it can't work for my postgres process.
[root@cent6 Desktop]# cat /etc/cgconfig.conf
#
# Copyright IBM Corporation. 2007
#
# Authors:
I want to backup a database but exclude certain schemas with a patter.
I have 100 schemas with the pattern: 'sch_000', 'sch_001', and so on.
Will this work?
$pg_dump other_options --exclude-schema='sch_*'
this does not seem to exclude all schemas with this pattern ( 'sch_*' ),
anything wrong
Hi all,
I have a fairly simple query, running on a particularly large table. For
illustration:
echo select * from really_big_table; | psql my_database /dev/null
When I monitor the memory usage of the psql session, it continually grows.
In fact, for this particularly large table it grows to
Tim Kane wrote:
I have a fairly simple query, running on a particularly large table. For
illustration:
echo select * from really_big_table; | psql my_database /dev/null
See psql's FETCH_COUNT. From the manpage:
FETCH_COUNT
If this variable is set to an
On Thu, Sep 5, 2013 at 6:05 PM, Tomas Vondra t...@fuzzy.cz wrote:
On 5 Září 2013, 8:52, Arun P.L wrote:
Actual intention of the migration of old records was to
speed up the original_data_table which is used frequently by users. How
can I get this problem get this fixed? What are the steps to
(13/09/06 21:06), Tim Kane wrote:
Hi all,
I have a fairly simple query, running on a particularly large table. For
illustration:
echo select * from really_big_table; | psql my_database /dev/null
When I monitor the memory usage of the psql session, it continually grows.
In fact, for this
On Fri, Sep 6, 2013 at 4:04 PM, Albe Laurenz laurenz.a...@wien.gv.at wrote:
ascot.m...@gmail.com wrote:
I am planing to backup archived WAL files from master to another machine, is
there a way to check and
make sure the backup archive file are all good and no any file missing or
corrupted?
Ahh. All these years (albeit sporadic), I never knew about FETCH_COUNT.
That makes sense. Thanks muchly.
On 06/09/2013 14:11, Suzuki Hironobu hiron...@interdb.jp wrote:
(13/09/06 21:06), Tim Kane wrote:
Hi all,
I have a fairly simple query, running on a particularly large table.
For
Hi everyone:
I want to know if exists a postgres function or some easy way to know if a
PK in a table is already referenced in another table/tables.
e.g.
I want to delete a row but first I've got to change or delete in the
table/tables where is referenced, and I have many table where could be
Hi Augustin,
PostgreSQL has a couple of possibilities in this regard.
For example,
http://stackoverflow.com/questions/1152260/postgres-sql-to-list-table-foreign-keyshas
a couple of very clear queries.
Additionally, it would be very useful if you could further clarify the
problem you are trying
On Fri, Sep 6, 2013 at 10:26 PM, Agustin Larreinegabe
alarre...@gmail.com wrote:
I want to know if exists a postgres function or some easy way to know if a
PK in a table is already referenced in another table/tables.
psql has all you want for that. For example in this case:
=# create table aa (a
On Fri, Sep 6, 2013 at 8:19 AM, Tim Kane tim.k...@gmail.com wrote:
Ahh. All these years (albeit sporadic), I never knew about FETCH_COUNT.
That makes sense. Thanks muchly.
Not your fault: FETCH_COUNT is a hack IMO. The real issue was that
libpq (until recently) forced the entire result into
Thanks a lot
On Fri, Sep 6, 2013 at 9:51 AM, Michael Paquier
michael.paqu...@gmail.comwrote:
On Fri, Sep 6, 2013 at 10:26 PM, Agustin Larreinegabe
alarre...@gmail.com wrote:
I want to know if exists a postgres function or some easy way to know if
a
PK in a table is already referenced in
Bobby Dewitt wrote
I come from an Oracle background and I am fairly new to Postgres.
Oracle's command line utility (SQL*Plus) uses an environment variable
called SQLPATH to search the given directories for SQL scripts that the
user calls to execute using a method similar to the \i
We use logshipping replication, and have recently noticed a nasty bug
where, in certain very rare cases, the primary archive_command program
will fail to send the WAL file to the standby but report good return code 0 to
postgresql.
In such cases, if the standby then triggers its termination
Do you know the destination. I cant find it.
Where can I change levensthein_max_length?
Janek Sendrowski
Von: Szymon Guz mabew...@gmail.com
An: Tom Lane t...@sss.pgh.pa.us
Betreff: Re: [GENERAL] Levenshtein Distance with more than 255 characters
On 6 September 2013 08:47, Tom Lane t...@sss.pgh.pa.us wrote:
Szymon Guz mabew...@gmail.com
On 9/6/2013 2:00 PM, jane...@web.de wrote:
Where can I change levensthein_max_length?
as the message you quoted said, its
#define MAX_LEVENSHTEIN_STRLEN
I'd expect this (without bothering to look) to be in a .h file in the
fuzzystrmatch contributed module directory.
--
john r
In my opinion, the use of such a feature is to make simple, commonly
used scripts available from wherever you start up psql and no matter
what database you are connecting to. On Oracle/SQL*Plus I have used
this feature to create simple scripts that replicate informational
backslash commands in
On Fri, Sep 06, 2013 at 10:45:26AM -0700, David Johnston wrote:
- lup wrote
-
-
- I wonder if this would at least get the full path on-screen for a c/p
- \! for d in $SQLPATH; do find $d -name
- script-filename
- ; done
-
- That said, I would down-vote this suggestion. I tend to
Hi all,
I'm curious about some of the query estimates that I'm seeing with queries
that use DISTINCT.
I am using postgres 8.4.13
I did a couple of quick tests, and found that PostgreSQL seems to do some
expensive work to
return DISTINCT rows. This is contrary to what I was expecting because I
lup wrote
I wonder if this would at least get the full path on-screen for a c/p
\! for d in $SQLPATH; do find $d -name
script-filename
; done
That said, I would down-vote this suggestion. I tend to put sql files
in amongst my various project dirs and maintaining the envvar isn't
On 09/06/2013 11:05 AM, miles wrote:
Bobby Dewitt wrote
I come from an Oracle background and I am fairly new to Postgres.
Oracle's command line utility (SQL*Plus) uses an environment variable
called SQLPATH to search the given directories for SQL scripts that the
user calls to execute using a
Peter Geoghegan wrote:
On Thu, Sep 5, 2013 at 8:22 AM, Merlin Moncure mmonc...@gmail.com wrote:
I'm still partial to this guy:
http://www.commandprompt.com/images/mammoth_versus_dolphin_500.jpg
I dislike that image, and always have. ...
I agree with Mr. Geoghegan.
That image should be
pg noob pgn...@gmail.com wrote:
The GROUP BY performs much better than DISTINCT even though both
these two queries return the exact same count result.
No, GROUP BY performs much better than count(DISTINCT colname).
To confirm that this isn't something that has changed in the four
years since
On Thu, Sep 5, 2013 at 8:22 AM, Merlin Moncure mmonc...@gmail.com wrote:
I'm still partial to this guy:
http://www.commandprompt.com/images/mammoth_versus_dolphin_500.jpg
I dislike that image, and always have. Apart from risking alienating
people, I think it sends the wrong message - that we
On Friday, September 6, 2013, pg noob wrote:
Hi all,
I'm curious about some of the query estimates that I'm seeing with queries
that use DISTINCT.
I am using postgres 8.4.13
I did a couple of quick tests, and found that PostgreSQL seems to do some
expensive work to
return DISTINCT rows.
If I have a partitioned table that has some range constraints that look kinda
like they're intended for constraint exclusion, but aren't quite
non-overlapping, will that break anything?
e.g.
create table jan ( …, check(created = '2013-01-01' and created
'2013-02-01'), check(id =0 and id
Le 2013-09-07 à 00:29, Steve Atkins a écrit :
If I have a partitioned table that has some range constraints that look kinda
like they're intended for constraint exclusion, but aren't quite
non-overlapping, will that break anything?
e.g.
create table jan ( …, check(created =
On Sep 6, 2013, at 9:37 PM, François Beausoleil franc...@teksol.info wrote:
Le 2013-09-07 à 00:29, Steve Atkins a écrit :
If I have a partitioned table that has some range constraints that look
kinda like they're intended for constraint exclusion, but aren't quite
non-overlapping, will
38 matches
Mail list logo
