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The ISSESSION function determines whether the current member of a specified dimension is a temporary member (that is, a member added when a MAINTAIN ADD SESSION statement executes).
YES when the member is a temporary member;
NO when it is not.
Specifies that for a dimension with base dimensions, that Oracle OLAP will test the values of the base dimensions when making its determination.
The name of the dimension whose current member value is to be tested by Oracle OLAP.