2520666 - List function returns NULL instead of empty string - SAP IQ 16.1

The LIST function returns the concatenation (with delimiters) of all the non-NULL values of X for each row in the group.

If there does not exist at least one row in the group with a definite X-value, then LIST( X ) returns the empty string. 

On SAP IQ 16.1 SP 02, it returns NULL instead of an emptry string.

SAP IQ 16.1 SP 02

CR# 810242 ; 810242 , KBA , BC-SYB-IQ , Sybase IQ , Bug Filed