Re: [SQL] NULL - Mailing list pgsql-sql

From Bruce Momjian
Subject Re: [SQL] NULL
Date
Msg-id 199911151924.OAA21880@candle.pha.pa.us
Whole thread Raw
In response to NULL  (Goran Thyni <goran@kirra.net>)
Responses Re: [SQL] NULL  (wieck@debis.com (Jan Wieck))
List pgsql-sql
[Charset iso-8859-1 unsupported, filtering to ASCII...]
> 
> How about this according to SQL standard:
> 
> CREATE TABLE x { y integer NULL };
> 
> It suppose to mean that NULLs are explicitly allowed in 
> this field.
> Is this required by SQL-92?

If I remember correctly, only NOT NULL is supported by SQL-92.  Thomas
talked about adding support for it in some limited cases for 7.0.  There
are shift/reduce cases if it were allowed everywhere.


--  Bruce Momjian                        |  http://www.op.net/~candle maillist@candle.pha.pa.us            |  (610)
853-3000+  If your life is a hard drive,     |  830 Blythe Avenue +  Christ can be your backup.        |  Drexel Hill,
Pennsylvania19026
 


pgsql-sql by date:

Previous
From: Goran Thyni
Date:
Subject: NULL
Next
From: Bruce Stephens
Date:
Subject: Re: [SQL] NULL