List:General Discussion« Previous MessageNext Message »
From:Jigal van Hemert Date:April 26 2005 1:20pm
Subject:Re: why NOT NULL in PRIMARY key??
View as plain text  
From: "Jay Blanchard"

> Since NULL is the absence of a value and PRIMARY keys must have a value
> a NULL column cannot be included as a portion of a PRIMARY key. AFAIK
> this is the case with every RDBMS out there. Asking the development team
> might get you a more informative response.
> 
> There is a vast difference between a zero value, blank value and NULL
> (absence of value).

The situation is pretty challenging:
- because of high concurrency and huge tables I need to use InnoDB
- InnoDB really needs a PRIMARY key for fast results
- a PRIMARY key does not allow NULL values as part of the key

Anyhow, we something to think about...

Regards, Jigal.
Thread
why NOT NULL in PRIMARY key??Jigal van Hemert26 Apr
  • Re: why NOT NULL in PRIMARY key??Martijn Tonies26 Apr
  • Re: why NOT NULL in PRIMARY key??Jochem van Dieten26 Apr
  • Re: why NOT NULL in PRIMARY key??Jigal van Hemert26 Apr
  • Re: why NOT NULL in PRIMARY key??Harald Fuchs26 Apr
  • Re: why NOT NULL in PRIMARY key??Jigal van Hemert26 Apr
    • Re: why NOT NULL in PRIMARY key??SGreen26 Apr
      • Att. Shawn GreenJigal van Hemert2 May
  • Re: why NOT NULL in PRIMARY key??Dawid Kuroczko26 Apr
  • Re: why NOT NULL in PRIMARY key??Jigal van Hemert26 Apr
    • Re: why NOT NULL in PRIMARY key??Jochem van Dieten26 Apr
  • Re: why NOT NULL in PRIMARY key??Jigal van Hemert26 Apr
    • Re: why NOT NULL in PRIMARY key??Paul DuBois26 Apr
  • Re: why NOT NULL in PRIMARY key??Martijn Tonies26 Apr
  • Re: why NOT NULL in PRIMARY key??Mikhail Entaltsev26 Apr
  • Re: why NOT NULL in PRIMARY key??Jigal van Hemert26 Apr
  • Re: why NOT NULL in PRIMARY key??Harald Fuchs26 Apr
  • Re: why NOT NULL in PRIMARY key??Martijn Tonies26 Apr
  • Re: why NOT NULL in PRIMARY key??Jigal van Hemert27 Apr
    • Re: why NOT NULL in PRIMARY key??Peter Brawley27 Apr
  • Re: why NOT NULL in PRIMARY key??Jigal van Hemert27 Apr
    • Re: why NOT NULL in PRIMARY key??Frank Bax27 Apr
    • Re: why NOT NULL in PRIMARY key??Peter Brawley27 Apr
    • Re: why NOT NULL in PRIMARY key??Joerg Bruehe27 Apr
  • Re: why NOT NULL in PRIMARY key??Jigal van Hemert28 Apr
RE: why NOT NULL in PRIMARY key??Jay Blanchard26 Apr
  • Re: why NOT NULL in PRIMARY key??Jigal van Hemert26 Apr
    • Re: why NOT NULL in PRIMARY key??Paul DuBois26 Apr
  • RE: why NOT NULL in PRIMARY key??Frank Bax26 Apr
  • Re: why NOT NULL in PRIMARY key??Jigal van Hemert26 Apr
    • Re: why NOT NULL in PRIMARY key??Paul DuBois26 Apr
  • Re: why NOT NULL in PRIMARY key??Martijn Tonies26 Apr
  • Re: why NOT NULL in PRIMARY key??Jigal van Hemert26 Apr
    • Re: why NOT NULL in PRIMARY key??Paul DuBois26 Apr
    • Re: why NOT NULL in PRIMARY key??Peter Brawley26 Apr
RE: why NOT NULL in PRIMARY key??emierzwa26 Apr
  • RE: why NOT NULL in PRIMARY key??SGreen26 Apr
  • Re: why NOT NULL in PRIMARY key??Martijn Tonies26 Apr
RE: why NOT NULL in PRIMARY key??Jay Blanchard26 Apr
  • Re: why NOT NULL in PRIMARY key??Dawid Kuroczko27 Apr
  • Re: why NOT NULL in PRIMARY key??Martijn Tonies27 Apr
RE: why NOT NULL in PRIMARY key??emierzwa26 Apr
Re: why NOT NULL in PRIMARY key??beacker30 Apr
  • Re: why NOT NULL in PRIMARY key??Jigal van Hemert1 May
  • Re: why NOT NULL in PRIMARY key??Martijn Tonies1 May