FREE MEMORY ID id.
This statement has the same effect as the statement
Outside of classes, you can omit the addition ID. Then, all
data clusters are deleted from the ABAP Memory.
You should refrain from using FREE MEMORY without the
addition ID. While the statement
EXPORT without addition ID involves only one
data cluster, in this case all clusters are involved. We recommend to use the statement
DELETE FROM, because here the addition ID is mandatory.