We briefly touched upon the topic of validation of mappings in the last chapter when we were working on our SALES cube mapping and talked about the error we would get if we tried to map a date attribute to a number attribute. Error checking is what validation is for. The process of validation is all about making sure the objects and mappings we've defined in the Warehouse Builder have no obvious errors in design.
Let's recap how we go about performing a validation on an object we've created in the Warehouse Builder. There are a number of places we can perform a validation. One of them is the main Design Center.
There is a context menu associated with everything we create. You can access it on any object in the Design Center by right-clicking on the object of your choice. Let's take a look at this by launching our Design Center, connecting as our ACMEOWB user, and then expanding our ACME_DW_PROJECT. Let's find our staging table, POS_TRANS_STAGE, and...