STRUC_CM_ECN is a standard SAP Structure so does not store data like a database table does. It can be used to define the fields of other actual tables or to process "Structure for Change Number List" Information within sap ABAP programs. This is done by declaring abap internal tables, work areas or database tables based on this Structure. These can then be used to store and process the required data appropriately. i.e. DATA: wa_STRUC_CM_ECN TYPE STRUC_CM_ECN.
The STRUC_CM_ECN table consists of various fields, each holding specific information or linking keys about Structure for Change Number List data available in SAP. These include SYS_STATUS (Object status), SYS_STATUS_TEXT (Change status text), STATUS (Status of change number), DATE_TYPE (Meaning of the date (see CL_EXPO_VALIDITY_CONTROLLER))... See below for full list along with technical details, documentation, text table, check tables, foreign key relationships, conversion routines, relevant tcodes and example ABAP select code etc. .