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ABAP Keyword Documentation → ABAP − Reference → Processing External Data → Data Clusters →Syntax
FREE MEMORY ID id.
Effect
This statement has the same effect as the statement
Outside of classes, you can omit the addition ID. In this case, all
data clusters are deleted from the
ABAP Memory.
Note
The use of FREE MEMORY without the addition ID is
obsolete. While the statement EXPORT
without addition ID involves only one data cluster, in this case all clusters
are involved. We recommend using the statement DELETE FROM, because here the addition ID is mandatory.