1819817 - BI 4 : Using percentile_disc function with group by in SQL generate the following error when being validate 'The database error text is ora-00979: not a group by expression. (wis 10901)'

• Cannot run WebIntelligence report with Percentile_disc and group by.
• Validating SQL from webi report containing Percentile_disc and group by generates the following error :"A database error occurred. The database error text is ora-00979: not a
  group by expression. (wis 10901)”
  
  

• SAP Business Objects BI 4
• Business Objects XI 3.1
• WebIntelligence
• Oracle DB

KBA , BI-RA-WBI , Web Intelligence , Bug Filed