Bookshelf Home | Contents | Index | Search | PDF

Configuration Guidelines > Database Extensibility >

Advanced Database Extensibility Guidelines

---

Many of the issues that you may encounter when using advanced database extensibility are specific to a given situation, business need, or architecture. Therefore, it is not possible to offer advice for every possible situations. However, here is a list of some of the known issues that you should consider when planning to use advanced database extensibility:

For stand-alone tables, EIM support is not possible without assistance from Siebel Expert Services.
Because of fundamental changes to the schema, there are extensions that are no longer appropriate. For example, in the past, you could create additional one-to-one extension tables for S_CONTACT. However, this is no longer possible because S_CONTACT is now an extension of S_PARTY and you cannot create extension tables for existing extension tables.
Typically, new tables require new indexes. A database administrator and Siebel Expert Services do index planning. Even when correctly implemented, custom indexes can cause the standard indexes to not be used. This can adversely impact the application's performance.
Avoid using an _XM table as an extension to an existing _XM table, because it will cause issues with EIM because of the design of the EIM processes.
Custom one-to-one extension tables automatically support docking and mobile users. However, you still need to create any EIM mappings.
To specify the appropriate visibility strengths, there are certain assumptions that are made when using the Docking Wizard to create dock objects. If these assumptions are not appropriate for your business needs, contact Siebel Expert Services to modify the Dock Object settings.
Modifying standard base tables and their columns is not supported.
Always use uppercase for any new tables or columns.
You cannot add EIM mappings for foreign key relationships to tables that do not have user key attributes.
You must follow all of the required steps for EIM and Docking to create a supported system.

Bookshelf Home | Contents | Index | Search | PDF