Limitations of calculations in dimensional reporting

Minimal checking exists for calculations. If your calculation uses an invalid expression, your report results may contain unexpected values.

In addition, you should define member summaries as follows:

 summary_function (currentMeasure within set set_reference)

where set_reference is a level or set inserted from the Source tab .

Unless otherwise required, summary_function should be the aggregate function. If you use an explicit summary function, you may encounter problems with measures (such as profit margin, distinct count, and so on) that have complex rollup values, and/or scenario or account dimension members that do not roll up.

Know your data, and confirm with the owner of the cube where overriding the automatic aggregation is safe.

Because of these limitations, summaries of calculations may not provide reliable values. For convenience, you may have to build reports where row summaries and calculated member columns intersect. In such reports, these intersections may contain unexpected values. In contrast, row calculations intersecting with column aggregates using the aggregate function are safe because the calculation is performed on the reliably summarized values.