The $AGGREGATE_FORCEORDER property specifies the same behavior as that specified by the FORCEORDER keyword in an AGGREGATE command or an AGGREGATE function. By adding an $AGGREGATE_FORCEORDER property to a variable you can ensure this behavior when the variable is aggregated, even when it is aggregated by an AGGREGATE statement does not include the FORCEORDER keyword.
The behavior specified by both the $AGGREGATE_ORDER property and the FORCEORDER keyword is that the calculations must be performed in the order in which the RELATION (for aggregation) statements are listed in the aggmap used for the aggregation. Typically, you want this behavior when some values calculated through aggregation have changed because, otherwise, the optimization methods used by AGGREGATE may cause the modified values to be ignored. (Note, however, that forcing the order of execution can slow performance.)
To add the property, issue the following statement.
To delete the property, issue the following statement.
PROPERTY DELETE '$AGGREGATE_FORCEORDER'