Re: [GENERAL] delete is getting hung when there is a huge data in table

2015-05-03 Thread Uwe Schroeder
This delete runs in a single transaction. That means the entire transaction has to complete before you will see anything deleted. Interrupting the transaction simply rolls it back, so nothing is deleted. Tom already pointed out the potential foreign key slowdown, another slowdown may simply be

Re: [GENERAL] earthdistance

2013-08-09 Thread Uwe Schroeder
How accurate do you need it? My website has a lot of local listing stuff based on a distance from the viewer and I use the earthdistance module in contrib to do it. Given, it's not accurate enough to calculate a surgical missile strike, but for within 20 miles type of things it's good enough

Re: [GENERAL] Views versus user-defined functions: formatting, comments, performance, etc.

2012-08-17 Thread Uwe Schroeder
Hi: I notice when I save a view, I lose all the formatting and comments. As I was writing a complicated view, wanting to retain the format and comments, I thought I could just save it as a function that returns a table value. A function would evaluate to the same value as a view, but

Re: [GENERAL] Hint for a query

2011-11-04 Thread Uwe Schroeder
I have this tables Table: Contact IdContact First Name Second Name … other columns Table: Employee IdEmployee IdContact, related to Contact table … other columns Table: Salesman IdSaleman IdEmployee, if salesman is employee, related to Employee table IdContact, if salesman

Re: [GENERAL] Searching for bare letters

2011-10-02 Thread Uwe Schroeder
Hi, everyone. Uwe wrote: What kind of client are the users using? I assume you will have some kind of user interface. For me this is a typical job for a user interface. The number of letters with equivalents in different languages are extremely limited, so a simple matching routine in

Re: [GENERAL] Searching for bare letters

2011-10-01 Thread Uwe Schroeder
Hi, everyone. I'm working on a project on PostgreSQL 9.0 (soon to be upgraded to 9.1, given that we haven't yet launched). The project will involve numerous text fields containing English, Spanish, and Portuguese. Some of those text fields will be searchable by the user. That's easy

Re: [GENERAL] (another ;-)) PostgreSQL-derived project ...

2011-09-25 Thread Uwe Schroeder
... you're looking for a non-sql compliant SQL database where a lot of the data integrity is actually coded in the application :-) ~ First past of your statement I acknowledged, but how is it exactly that lot of the data integrity is actually coded in the application ~ Take dates for

Re: [GENERAL] (another ;-)) PostgreSQL-derived project ...

2011-09-25 Thread Uwe Schroeder
First, I wonder what kind of technical person would say there are de-facto truth(s). I thought only politicians would talk like that. Well, politicians and Microsoft, Oracle etc. :-) Now, in a sense you are right, I am talking from the background of my own experiences (and so are you).

Re: [GENERAL] (another ;-)) PostgreSQL-derived project ...

2011-09-24 Thread Uwe Schroeder
~ I have been searching for a PostgreSQL-derived project with a less-is-best Philosophy. Even though I have read about quite a bit of PG forks out there, what I have in mind is more like a baseline than a fork. ~ My intention is not wrapping the same thing in a different package or

Re: [GENERAL] Oracle / PostgreSQL comparison...

2011-06-23 Thread Uwe Schroeder
http://cglendenningoracle.blogspot.com/2011/06/oracle-vs-postgres-postgre sql.html Any comments? Amusing. What kind of support is available if we have a problem? What is their patching schedule to address exploits and known security defects? If there is a bug, how responsive

Re: [GENERAL] Oracle / PostgreSQL comparison...

2011-06-23 Thread Uwe Schroeder
On 06/24/2011 09:14 AM, Rodrigo E. De León Plicet wrote: I'm quite surprised the article didn't mention the importance of having somebody to sue if it goes wrong, which is a comment I often see made re Oracle. It's lucky they didn't try to stress that point, because evidence of succesful

[GENERAL] Why is 8.4 and 9.0 so much slower on some queries?

2011-04-11 Thread Uwe Schroeder
Hello everyone, this is very odd, particularly because there's obviously nobody having these issues when I google for it. I have a 8.3 database and decided for various reasons to upgrade to 8.4. I also tried 9.0 - same results. On the exactly same hardware with the exactly same

Re: [GENERAL] Why is 8.4 and 9.0 so much slower on some queries?

2011-04-11 Thread Uwe Schroeder
Uwe Schroeder u...@oss4u.com writes: I have a 8.3 database and decided for various reasons to upgrade to 8.4. I also tried 9.0 - same results. On the exactly same hardware with the exactly same configuration, some queries perform a factor of 10 slower on 8.4 and 9.0 than on 8.3

Re: [GENERAL] Web Hosting

2011-03-05 Thread Uwe Schroeder
Godaddy virtual hosting does in fact support postgresql. You have a root account on the virtual server and you can install whatever you want. I run several servers with them and all have postgresql, some virtual, some dedicated servers. Haven't tried their shared servers though, so I can't say

[GENERAL] PG9.0 planner difference to 8.3 - majorly bad performance

2011-01-29 Thread Uwe Schroeder
Maybe someone here can make sense of this. I'm trying to upgrade a 8.3 system to a 9.0 system. Usual procedure dump, restore, vac full, reindex. Both - old and new - run on the same hardware and the postgresql.conf settings are identical. You'll probably ask for the table definitions, which

Re: [GENERAL] PG9.0 planner difference to 8.3 - majorly bad performance

2011-01-29 Thread Uwe Schroeder
On 29 January 2011 09:11, Uwe Schroeder u...@oss4u.com wrote: Maybe someone here can make sense of this. I'm trying to upgrade a 8.3 system to a 9.0 system. Usual procedure dump, restore, vac full, reindex. Both - old and new - run on the same hardware and the postgresql.conf

Re: [GENERAL] PG9.0 planner difference to 8.3 - majorly bad performance

2011-01-29 Thread Uwe Schroeder
* Uwe Schroeder (u...@oss4u.com) wrote: Now I turn off the 8.3 instance and start the 9.0 instance. Remember, everything is identical. Here the same query again: Everything isn't identical if you just started PG 9.0 though- presumably the 8.3 instance had everything cache'd already. What

Re: [GENERAL] PG9.0 planner difference to 8.3 - majorly bad performance

2011-01-29 Thread Uwe Schroeder
del The duration suddenly goes from 270 milliseconds to 173 seconds! The index scan on bprofile_comments_status_idx suddenly shows 15288 loops, where it should be 1 loop just like before. So shomehow the 9.0 planner gets it all wrong. I also noticed that normally I get an iowait with a

Re: [GENERAL] Subselect AS and Where clause

2011-01-26 Thread Uwe Schroeder
Uwe Schroeder, 26.01.2011 08:34: I have a query like this: SELECT a,b,c, (select problem from other_table where id=a) as problem FROM mytable WHERE a=1 So far so good. Actually problem always resolves to one record, so it's not the multiple records returned problem. What I

[GENERAL] Subselect AS and Where clause

2011-01-25 Thread Uwe Schroeder
Google being useless tonight - now that's new :-) What I'm trying to do is the following and I'm certain there is a simple solution which eludes me: I have a query like this: SELECT a,b,c, (select problem from other_table where id=a) as problem FROM mytable WHERE a=1 So far so good.

Re: [GENERAL] Moving from SQL Anywhere to PostGres - First Time

2011-01-21 Thread Uwe Schroeder
Hi, Price and features. There are some changes in V12 which is causing us to do some steps with our support and resellers. We've always wanted to move away from Sybase so we can make more of a profit off our software and lower costs for us and our clients. Sybase is a wonderful

Re: [GENERAL] What is better method to backup postgresql DB.

2010-10-27 Thread Uwe Schroeder
In response to Steeles stee...@gmail.com: new to postgresql. need to backup postgresql DB, which way is better to backup DB. from training, I learned that we can backup the whole PGdata and other directories to achieve backup goal, originally I was planned to schedule jobs to use

Re: [GENERAL] Trade Study on Oracle vs. PostgreSQL

2010-09-24 Thread Uwe Schroeder
On 25/09/2010 4:55 AM, Leif Biberg Kristensen wrote: On Friday 24. September 2010 20.04.26 Lincoln Yeoh wrote: Then again, does Tom ever sleep? Maybe he sleeps in the afternoon? Or is that when he does intensive coding? Once there was a suggestion on this list to give Tom every other

Re: [GENERAL] Transposing rows and columns

2010-09-16 Thread Uwe Schroeder
I'm working with some people who live and breath Excel. I need to be able to move data back and forth between formats which make sense for Excel and for PostgreSQL. In some cases, this is just to accommodate what people are used to. In other cases, like statistical clustering, it's

Re: [GENERAL] calculating distance between longitude and latitude

2010-06-09 Thread Uwe Schroeder
Does postgresql have functions to calculate the distance between two sets of longitude and latitude. You're looking for the earthdistance contrib module. With most Linux distros it's installed under /usr/share/postgresql/8.xx/contrib You may have to install a postgresql-contrib package

Re: [GENERAL] virtualidx exclusive lock

2009-11-09 Thread Uwe Schroeder
On Sunday 08 November 2009 11:38:28 pm Uwe Schroeder wrote: I've googled, but there's 0 hits. I have an issue with a ton of idle in transaction backends. What I noticed is when I look at pg_locks, pretty much all of the processes being idle in transaction have an exclusive lock of locktype

Re: [GENERAL] Backups

2009-11-08 Thread Uwe Schroeder
Personally I prefer multiple stages of backups off-site. So for my production webserver database, I have slony replicating the database to a different location. In addition I run full dumps every 12 hours which in turn I replicate using rdist to a remote system. That way, whatever happens, the

[GENERAL] virtualidx exclusive lock

2009-11-08 Thread Uwe Schroeder
I've googled, but there's 0 hits. I have an issue with a ton of idle in transaction backends. What I noticed is when I look at pg_locks, pretty much all of the processes being idle in transaction have an exclusive lock of locktype virtualidx. Well, that doesn't make sense to me, but maybe