1. For the sake of clarity we do not show here how time granularity is handled in the translation; usually, this will depend on the underlying DBMS.

  2. Notation: The dimensions' sub-indices represent their position in the fact table to which they are bound. In the implementation, constructions of the form x 4 Y:x, are replaced by x[t] -+ Y:x, in order to simplify parsing.

  3. In an actual implementation, Now can be replaced by Sysdate() or any function returning the current time.

  4. Actually, the parenthesis is not required.

Multidimensional Databases(c) Problems and Solutions
Multidimensional Databases: Problems and Solutions
ISBN: 1591400538
EAN: 2147483647
Year: 2003
Pages: 150

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