Thursday, July 31, 2008

Difference in dimensional expressions between RS8.2 and 8.3 - part two

I found another one

code in 8.2

set( emptySet([My Dimension].[My Hierarchy]) )

code in 8.3

set( item(emptySet([My Dimension].[My Hierarchy]),0) )

without the use of item() you get an error
Invalid coercion from 'memberSet' to 'member, measure'
even though the expression validates.

This is important when you want to create prompts that return MUNs but are optional.
As a recap from my older posts optional for a prompt means that it has a default value. The default is ... no members selected
...in other words: empty set
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5 comments:

  1. AlexAugust 13, 2008 at 8:13 PM

    Interesting post. Did you experience any performance differences in 8.3 versus 8.2 with MDX ?

    ReplyDelete
  2. Tamas Simon (Sic)September 19, 2008 at 12:39 PM

    We didn't really get to the point with 8.3 where I could compare performance.

    ReplyDelete
  3. UnknownFebruary 5, 2010 at 9:16 PM

    Hi there,

    Would the syntax for 8.3 also work for 8.4? I am getting the same "Invalid coercion from 'memberSet' to 'member, measure'" error. I am trying to make a multi-select tree prompt optional. Any ideas?

    Thanks

    ReplyDelete
  4. AnonymousFebruary 8, 2010 at 8:46 AM

    looks like your expression is returning a memberSet
    and Cognos expect a single member.
    if you use something like the code snippets above then yes, they do return a memberSet...
    so I would look at why Cognos is expecting a single member instead

    ReplyDelete
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