Re: ecpg: arrays and nulls - Mailing list pgsql-interfaces

From Michael Meskes
Subject Re: ecpg: arrays and nulls
Date
Msg-id 20050823095338.GB8559@1
Whole thread Raw
In response to ecpg: arrays and nulls  (Kuba Ouhrabka <kuba@comgate.cz>)
Responses Re: ecpg: arrays and nulls
List pgsql-interfaces
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@jabber.org
Go SF 49ers! Go Rhein Fire! Use Debian GNU/Linux! Use PostgreSQL!


pgsql-interfaces by date:

Previous
From: Michael Meskes
Date:
Subject: Re: ecpg and VARCHAR
Next
From: Scott Cain
Date:
Subject: DBD::Pg and "invalid frontend message type 10"