This warning indicates that the given column is only mapped to logical table sources that are disabled. The warning brings this issue to the repository developer's attention in case the default behavior is not desired.

Modeling Time Series Function in OBIEE
Modeling Time Series Data
Time series functions provide the ability to compare business performance with previous time periods, allowing you to analyze data that spans multiple time periods. For example, time series functions enable comparisons between current sales and sales a year ago, a month ago, and so on.
Because SQL does not provide a direct way to make time comparisons, you must model time series data in the Oracle BI repository. First, set up time dimensions based on the period table in your data warehouse. Then, you can define measures that take advantage of this time dimension to use the AGO, TODATE, and PERIODROLLING functions.

Enterprise Install: This installation type assumes some familiarity with Oracle Business Intelligence. All software components are downloaded onto one computer. You can accept the default configuration settings or use your own. You use this installation type when you have an established Oracle WebLogic domain, and you want to extend it to the Oracle Business Intelligence application. This install option is typically used for more advanced deployments with multiple users, such as to scale out a deployment on additional computers.

CurrentDay and CurrentMonth can be calculated by a sql statement.
Note:
REPOSITORY VARIABLE(DYNAMIC)
Initialized when BI server is started
Assigned value dynamically based on the result of a query
Value is dependent of the sql provided in Initialization Block
Create a dynamic variable and provide a Name and Default Initializer.Create a new initialization block by clicking on the New button in the above screen.

Provide Intialization Block variable Name

You have three sort of fragmentation:
Fact-based / Dimension-based fragmentation
Content-based / Value-based fragmentation
Level-based fragmentation / aggregate navigation
You can combine the techniques above to construct powerful design that are known as Complex partitioning / fragmentation. When you fragment a dimension, you are automatically in a complex fragmentation.