logo       

Re: ecpg: arrays and nulls: msg#00038

Subject: Re: ecpg: arrays and nulls
On Tue, Aug 02, 2005 at 10:40:23AM +0200, Kuba Ouhrabka wrote:
> I'd like to ask how to handle null values when fetching arrays into 
> ecpg. Always I get this error:
> 
> Data read from backend is not an array in line ...

Found it. The check for array data was doen too early. Of course a
NULL does not look like an array, so the message was issued before the
data was tested on NULL values. I changed the order and it appears to be
fine now. Expect a commit as soon as I am online again.

> Can null values in columns of array type be handled in more convenient 
> way than using coalesce/nullif and special reserved value?

Not sure what you mean with this? Do you want an integer array like
this {1,2,3,NULL,4,5}? I don't see how this could be possible as the
array itself is the value of the column. You can of course use a
relation instead of an array. In first normalform this should be easy to
do.

Michael
-- 
Michael Meskes
Email: Michael at Fam-Meskes dot De, Michael at Meskes dot (De|Com|Net|Org)
ICQ: 179140304, AIM/Yahoo: michaelmeskes, Jabber: meskes@xxxxxxxxxx
Go SF 49ers! Go Rhein Fire! Use Debian GNU/Linux! Use PostgreSQL!

---------------------------(end of broadcast)---------------------------
TIP 9: In versions below 8.0, the planner will ignore your desire to
       choose an index scan if your joining column's datatypes do not
       match



<Prev in Thread] Current Thread [Next in Thread>
Google Custom Search

Recently Viewed:
audio.irate.dev...    yellowdog.gener...    ietf.ips/2002-0...    xfree86.fonts/2...    busybox/2003-07...    emacs.jdee/2004...    linux.mandrake....    hardware.microc...    user-groups.lin...    science.analysi...    version-control...    db.filemaker.de...    cluster.openmos...    mail.eyebrowse....    text.xml.xerces...    kde.devel.kwrit...    finance.moneyda...    gcc.regression/...    network.routing...    os.freebsd.deve...    recreation.radi...    qnx.openqnx.dev...    python.xml/2002...   
Home | blog view | USPTO Patent Archive | advertise | OSDir is an inevitable website. super tiny logo

Free Magazines

Cisco News
Receive a free quarterly e-newsletter with exclusive articles on how Cisco IT uses its own products and solutions to enable the business.
subscribe

Systems Management News, the newspaper for IT systems administration and data center managers! Each issue of Systems Management News is chock-full of news and analysis to help you understand what's happening in your field.
subscribe

The Enterprise Newsweekly eWeek is the essential technology information source for builders of e-business.
subscribe

Oracle Magazine Oracle Magazine contains technology strategy articles, sample code, tips, Oracle and partner news, how to articles for developers and DBAs, and more. Oracle (NASDAQ: ORCL) is the world's largest enterprise software company.
subscribe

Total Telecom Total Telecom is "The Economist of the communications industry".
subscribe