Open Exchange
Global Masters
InterSystems IRIS Data Platform 2019.4 / Analytics / InterSystems MDX Reference / Expression Types / Hierarchy Expressions
Previous section   Next section

Hierarchy Expressions

This section describes how to create and use hierarchy expressions in InterSystems MDX.


In InterSystems MDX, a hierarchy expression has one of the following forms:
  • A hierarchy literal, which is a direct reference to the hierarchy as follows:
    For example:
  • A reference to a dimension:
    For example:
    The system interprets this as a reference to the first visible hierarchy of that dimension.
  • An expression that uses an InterSystems MDX extension to refer to a hierarchy in another cube, via the following syntax:
    Where relationship_name is the name of a relationship in the cube used by the query and hierarchy_expression refers to a hierarchy contained in that relationship.


A bare hierarchy expression returns all records; this expression is equivalent to an All member. (Note that you can use a bare hierarchy expression even if the dimension does not formally define an All level.) For example:
SELECT MEASURES.[%count] ON 0, colord.h1 ON 1 FROM patients
                             Patient Count
Also, you can use a hierarchy expression as an argument to any of the following functions:
Previous section   Next section