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Re: Denormalization to allow use UNQIUE index?
Posted by: Victor Porton ()
Date: November 12, 2016 02:14PM

Peter Brawley Wrote:
-------------------------------------------------------
> It's not a denormalisation issue.
>
> You say the relation of post to comment is 1:many.
> Then your comment FK is misformed, referencing the
> comment table instead of the post table.
>
> You need ...
>
>
> CREATE TABLE post ( 
>   id INT UNSIGNED NOT NULL AUTO_INCREMENT, 
>   body TEXT NOT NULL, 
>   issue_id INT UNSIGNED NOT NULL, 
>   PRIMARY KEY (id) 
> ); 
> 
> CREATE TABLE comment ( 
>   id int unsigned NOT NULL AUTO_INCREMENT, 
>   post_id int unsigned NOT NULL, 
>   body text COLLATE utf8_bin NOT NULL, 
>   PRIMARY KEY (id), 
>   FOREIGN KEY (post_id) REFERENCES post(id) 
> );

Certainly it was a typo. My question remains unaswered.

--
http://freesoft.portonvictor.org

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Subject Views Written By Posted
Denormalization to allow use UNQIUE index? 449 Victor Porton 11/11/2016 09:34AM
Re: Denormalization to allow use UNQIUE index? 228 Peter Brawley 11/11/2016 11:49AM
Re: Denormalization to allow use UNQIUE index? 220 Victor Porton 11/11/2016 01:02PM
Re: Denormalization to allow use UNQIUE index? 225 Peter Brawley 11/12/2016 01:25PM
Re: Denormalization to allow use UNQIUE index? 295 Victor Porton 11/12/2016 02:14PM
Re: Denormalization to allow use UNQIUE index? 214 Rick James 11/12/2016 05:38PM
Re: Denormalization to allow use UNQIUE index? 206 Peter Brawley 11/12/2016 06:30PM


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