Substring function in ASO Cube

Summary

Use Substring function on a dynamic member in ASO Cube [MDX]

Content

Hello experts,

I have a dynamic scenario, where I am trying to use a SUBSTRING function on an ASO cube, like bellow:

WHEN (ISANCESTOR([TOT_XXXXX],[Entity].CurrentMember) AND  [Account].CurrentMember IS [ACC_XXXX]) THEN ([ACC_YYYY],SUBSTRING([Entity].CurrentMember.[MEMBER_NAME],1,4),[Previous])

 

But i'm getting this error

Syntax error in input MDX query on line 9 at token 'SUBSTRING'.

I saw in the Oracle documentation that the SUBSTRING function is supported in MDX, but in other documentation it appears that it is not.

Could anyone tell me if this function is not actually supported?