Re: Horizontal Inheritance vs Abstract
Re: Horizontal Inheritance vs Abstract
- Subject: Re: Horizontal Inheritance vs Abstract
- From: Ian Joyner <email@hidden>
- Date: Wed, 7 Sep 2005 14:02:32 +1000
Thanks. We are using OpenBase with EO_PK_TABLE so to me it looks
superfluous, but it's always nice to keep things so they work in
different environments.
Ian
On 07/09/2005, at 1:57 PM, Chuck Hill wrote:
Hi Ian,
The answer is... it depends. Grin. For FrontBase, you need to
have the table there as that is what the unique key generator is
associated with. Other databases may need it for similar reasons.
If the database is using the EO_PK_TABLE to generate the keys then
this table really is superfluous.
Chuck
On Sep 6, 2005, at 8:51 PM, Ian Joyner wrote:
Perhaps I am not looking in the right place for the answer to
this. I have entities using horizontal inheritance where the
parent entity is abstract (because all the subclasses get their
own copies of attributes).
Now when I created the parent entity, I also gave it a table name
in EOModeler, which of course generates a table of that name.
However, since the entity is abstract the table is superfluous.
My question is: Is it alright to leave the table name blank so
that the table does not get generated for abstract entities? I
don't seem to be able to find this in the lists or in any books on
EO and horizontal inheritance.
Thanks
Ian Joyner
Sportstec
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