EntityFramework, Oracle, and Guid as PrimaryKey - HOWTO?

Discussion of open issues, suggestions and bugs regarding ADO.NET provider for Oracle
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Joined: Wed 27 May 2009 14:20

EntityFramework, Oracle, and Guid as PrimaryKey - HOWTO?

Post by BadOracle » Wed 27 May 2009 14:31

My company is probably getting a big deal with another company, which requires us to use an oracle-db instead of SQLServer 2008.

I am looking right now for an Entity Framework Provider which fits our needs. Your product looks very promising though.

I am absolutely new to Oracle databases.

How do you create a table with GUID/uniqueidentifier as primary-key?
I read about raw(32), raw(32), varchar(32),varchar(36) etc.
There is a function called SYS_GUID() which seemd to work.

The db i have created worked with generated guids,too.
But when i added them to the Entity Framework i got this problems:

Message 2 The table/view 'Catalog1.WPC.PROJECT' has column 'PROJECT_ID' defined as a primary key, but the column type 'RAW' is not a valid type for a key in EDM. An attempt will be made to define the table/view as a read-only table/view.

So my question would be, how to do it? Is it possible?

Strange new world these oracle databases... The most important thing i noticed is that they really like CAPS_LOCK.....

Thx for your help!

Posts: 29
Joined: Tue 09 Sep 2008 09:46

Post by robymes » Wed 27 May 2009 15:04

Guid in Oracle is RAW(16), if you set a primary key field in this way, when you update from the Entity Framework designer, automatically it recognizes the RAW(16) field type and will map it Guid in you entity class.

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