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Asked: 2026-05-18T12:37:35+00:00

That’s my first post here. Thanks in advance everyone that collaborates with me. I’m

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That’s my first post here. Thanks in advance everyone that collaborates with me.

I’m working on a new MER, this is a piece of the it: https://i.stack.imgur.com/jt5Mz.png.

alt text

In the linked MER, i’m using Table per Hierarchy on entities: Person, Company and Individual. Driver entity is on based on Table per Type.

My big problem is that a Driver can be Individual or Company.

Both Individual or Company inherites from Person that holds common fields from both entities.

There is a way to make the Driver entity flexible to be an Individual or a Company, using the Table per Type on Driver entity?

Thanks you all!!!

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1 Answer

  1. Editorial Team

    Why not change the design to say that a ‘Driver’ is ‘associated’ (0..1) rather than inherited from a Person. Basically making ‘driver’ an optional entity of person then both individual or company will inherit this.

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