Another powerful auditing feature is available within a calculation view to show the origin of a column.
From the Semantics node, you can choose a column and trace its origin with Column Lineage.
The column lineage shows, within the scenario of the opened calculation view, all the nodes where this column exists. At the bottom of the calculation view scenario, you find the origin of the column. Opening the Mapping tab of this node allows you to identify the source column name in the data source.
In a cube with star join calculation view, the Show Lineage feature only works for private columns, not shared columns from dimension calculation views.
Column lineage is very useful when columns are renamed within the calculation scenario, or when you want to see quickly where a calculated or restricted column originates from.
It also helps you to avoid mixing up columns with the same name, but not necessarily the same data that are present in several nodes of a calculation view.
For example, the NODE_KEY column in an SAP ERP system is used in many tables to join the master data-defining attributes.
You might want to make sure that the NODE_KEY column in the output of a dimension calculation view originates from the correct table (for example, the table SNWD_BP containing business partners) and not from another table, also used in the calculation view, in which a NODE_KEY column is present but does not identify business partners (for example, the NODE_KEY in the table SNWD_AD containing Contact addresses).
The Show Lineage feature stays active until you exit the Show Column Lineagemode by choosing Exit.
The Outline View
Watch this video to learn about the Outline View.
Make sure you do not mix up the Outline feature of the calculation view editor with the general Outline view of SAP Business Application Studio, which displays structured code into a hierarchy.