From: | "Jaime Casanova" <systemguards(at)gmail(dot)com> |
---|---|
To: | vincent <vincent(at)iim(dot)nctu(dot)edu(dot)tw> |
Cc: | pgsql-bugs(at)postgresql(dot)org |
Subject: | Re: BUG #2771: NULL values in FOREIGN KEY fields |
Date: | 2006-11-21 02:03:15 |
Message-ID: | c2d9e70e0611201803g7d630698ibf1572ec586aa85@mail.gmail.com |
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Lists: | pgsql-bugs |
On 11/20/06, vincent <vincent(at)iim(dot)nctu(dot)edu(dot)tw> wrote:
> When insert a null value in foreign key fields, an error occurs.
>
> CREATE TABLE TGroup (
> C_Group_ID CHAR(8) NOT NULL,
> C_Group_Name VARCHAR(50),
> C_Group_Parent CHAR(8) NOT NULL,
> CONSTRAINT TGroup_C_Group_Parent_fkey FOREIGN KEY (C_Group_Parent)
That's because your C_Group_Parent column has a Not Null constraint
and you can't insert null values in a Not Null columns
--
regards,
Jaime Casanova
"Programming today is a race between software engineers striving to
build bigger and better idiot-proof programs and the universe trying
to produce bigger and better idiots.
So far, the universe is winning."
Richard Cook
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