CL_CNS_CHANGE_POINTER_MANAGER - Change Pointer for Extraction

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Functionality

This class provides the methods for extraction of change pointers. It supports two ways of reading changepointers. In normal mode, all change pointers that match the selection criteria are read. In suppress mode, only one change pointer is returned for each export object category.

A change pointer manager always supports only the values set on initialization (attributes GROUP_ID, STATUS). There is only one change pointer manager for each combination of export object category and application ID.

The methods always supply the change pointers sorted according to export object key and creation time (CREATED_ON).

In suppress mode, the following restrictions apply:

- The methods supply one change pointer only for each export object key.

- Only the attributes CHGTYPE and EXPORTOBJEKTKEY are entered.

- The priority of the attribute CHGTYPE is: D = high priority, I = medium priority, U = low priority. For example: Three change pointers with the same export object key have the change categories I,U, and D. The change category returned in this case is D.

- After using the method GET_NEXT_PACKAGE or GET_KEY_RANGE, the method SET_STATUS_MULT must be called before the methods GET_NEXT_PACKAGE or GET_KEY_RANGE are selected again.

- The method SET_STATUS_MULT sets the status of a change pointer once only.

Relationships

Example

Notes

Further information

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