I am trying to mimic the action that occurs when one changes the Physical Model relationships from Primary Foreign **Key **to a Foreign Key.
Why? My data model will soon have hundreds of tables. I don’t wish to perform this action by hand.
The actions seem to be:
The relationship line between the Entities change (Identifying = Solid line, Non-Identifying = Broken line) NB: Code for this below
the associated Primary Foreign Key attributes within an Entity are ‘changed’ to be Foreign Key within (on, across, over) those attributes.****NB: I don’t know how to do this.
An associated index is created on the Foreign Key. NB: I don’t know how to do this.
I have located code to identify keys object (though I could not find reference to Keys in the [Script Editor | Expert Mode] Reference Guide) However, it appears that the keys only refers to Primary Keys, not Foreign Keys or Primary Foreign **Keys. ** I am aware that in TOAD Data Modeler:
Foreign Keys are shown in Green Font Color
Primary Foreign Keys are identified by Blue Font Color
Primary Keys are shown in Red Font Color
Qu 1: Using code; How does one identify when an Attribute has a setting of Foreign or **Primary Foreign. **
Qu 2. Using code: How to modify an Attribute setting to (Enforce a) Primary Key, Foreign Key or Primary Foreign Key. (obviously a Attribute may only be in one of those states)
Qu 3. Using code: How does one create a new Index, containing not the Primary Key (of that Entity), but the Foreign Key (of that entity). one Attribute, not compounded attributes.
I am aware that there are times when I will want to retain Primary Foreign **Key **over a Foreign Key, but I believe I can program for that component.
//Code to Change Relationship types from Identifying to Non-Identifying
for (e=0; e<Model.Relations.Count; e++)
iterObject = Model.Relations.GetObject(e);
iterObject.Identifying = false; //An associtated index will not be created, but you really should create an index to support this
//Do something here to create an index. I don’t know what as of yet.
//Code to identify if an Entity contains a Primary Key
for (e=0; e<Model.Entities.Count; e++)
Entity = Model.Entities.GetObject(e);
for (k=0; k<Entity.Keys.Count; k++)
Key = Entity.Keys.GetObject(k);
//Key.Name = “PK_”+Entity.Name;
Log.Information("Primary Key : " + Entity.Name );