The following code allocates new table partitions for the schema changes loaded from the myschema.df file:

define variable definitions as ISchema   no-undo.
define variable area        as IArea     no-undo.
define variable iterator    as IIterator no-undo.

definitions = service:GetSchemaChanges("myschema.df"). 
definitions:LoadOptions:ForceIndexDeactivation = true.
service:UpdateSchemaChanges(definitions).
iterator = definitions:Partitions:Iterator("ObjectType = 'table'"). 
do while iterator:HasNext():
  cast(iterator:Next(),IPartition):Allocate(). 
end.
  
service:UpdateSchema(definitions).

For more information, see: