May 2008
Intermediate to advanced
100 pages
55m
English
book
The Force.com Multitenant Architecture: Understanding the Design of Salesforce.com’s Internet Application Development Platform
by Salesforce.com
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The UniqueFields Pivot Table
Force.com lets an organization indicate when a field in an object must contain unique values (case-sensitive or case-insensitive). Considering the arrangement of the Data table and shared usage of the Value columns for custom field data, it is not practical to create unique database indexes for the table (similar to the problem discussed in the previous section for non-unique indexes).
To support uniqueness for custom fields, Force.com uses the pivot table called UniqueFields; this table is very similar to the Indexes pivot table except that the UniqueFields table’s underlying database indexes enforce uniqueness. When an application attempts to insert a duplicate value into a field that requires uniqueness, or an ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.