The CHANGE PARTITION command modifies a partition by performing a change in place. CDO changes the values you specify, and other values remain the same. Because a partition is a nonversioned element, CDO does not accept a branch designation or a version number in the partition name. The LOOKASIDE_PARTITION clause modifies the list of partitions whose contents are visible through the partition you are modifying. The PARENT_PARTITION clause modifies the partition hierarchy by naming an owner for an existing parent (owner) partition. This clause can be specified only once during the lifetime of the partition, in either the DEFINE PARTITION or CHANGE PARTITION command. The AUTOPURGE and NOAUTOPURGE keywords redefine the autopurge property for the partition. The value of this property indicates whether or not CDO automatically purges intermediate versions of elements in the partition when you promote the latest version.