Empty FROM Clause

OLE DB Programmer's Reference

Some providers derive the cube implicitly from the specified axis and slicer dimensions. For such providers, there is no need to specify a cube name in the FROM clause. Support for implicitly deriving a cube name from the rest of MDX is an optional feature: It is not required for compliance with OLE DB for OLAP.

To determine whether or not a data source object supports this feature, consumers can check to see if the MDPROPVAL_MJC_IMPLICITCUBE bit is set in the data source property MDPROP_MDX_JOINCUBES.

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