Follow up from bug
PDI-10250 but for the Memory group by step:
Make sure the following variables are correctly respected:
For backward compatibility, we introduce two new variables that effect aggregate functions (please see also the linked cases to follow up on other steps):
Description: Set this variable to Y to set the minimum to NULL if NULL is within an aggregate. Otherwise by default NULL is ignored by the MIN aggregate and MIN is set to the minimum value that is not NULL. See also the variable KETTLE_AGGREGATION_ALL_NULLS_ARE_ZERO.
Description: Set this variable to Y to return 0 when all values within an aggregate are NULL. Otherwise by default a NULL is returned when all values are NULL.