Re: [SQL] Inserting into table only if the row does not already

2004-10-16 Thread Steven Klassen
* C. Bensend <[EMAIL PROTECTED]> [2004-10-15 08:14:51 -0500]:

> Concurrency shouldn't be an issue - this is a perl script running
> from cron. The only concurrency that will ever happen is if I'm a
> bonehead and I run the script manually right as cron kicks off
> another copy.

Even cron'd scripts can run amok. Lock files are great as a CYA
measure even if you're relatively certain there will be no opportunity
for one copy to step on the next.

I once had a cron'd script mail upper management every hour I was on
vacation. You can imagine how long it was until I got another vacation
request approved. ;)

-- 
Steven Klassen - Lead Programmer
Command Prompt, Inc. - http://www.commandprompt.com/
PostgreSQL Replication & Support Services, (503) 667-4564

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TIP 9: the planner will ignore your desire to choose an index scan if your
  joining column's datatypes do not match


Re: [SQL] Database backup

2004-10-16 Thread Steven Klassen
* sreejith s <[EMAIL PROTECTED]> [2004-10-17 08:49:44 +0530]:

> How to take Database backup from an application developed in Visual
> Basic thats running at Windows Client and Database resting at Linux
> Server. THanx

pg_dump -U your_username your_database > your_database.sql

-- 
Steven Klassen - Lead Programmer
Command Prompt, Inc. - http://www.commandprompt.com/
PostgreSQL Replication & Support Services, (503) 667-4564

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TIP 7: don't forget to increase your free space map settings


Re: [SQL] Hi

2004-11-08 Thread Steven Klassen
* vasundhar <[EMAIL PROTECTED]> [2004-11-06 22:45:36 -0800]:

> Hi I am using REL on which only 7.3.2 PG only available and I want
> to upgrade it to the latest and also integrate it with Perl but my
> system is also not supporting the DBI any suggestions please

My suggestion would be to determine why your system won't support DBI
and fix it.

-- 
Steven Klassen - Lead Programmer
Command Prompt, Inc. - http://www.commandprompt.com/
PostgreSQL Replication & Support Services, (503) 667-4564

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TIP 5: Have you checked our extensive FAQ?

   http://www.postgresql.org/docs/faqs/FAQ.html