CMS_STR_MY_OBJ_PKY 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 "Primary Key for CMS_MY_OBJ" 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_CMS_STR_MY_OBJ_PKY TYPE CMS_STR_MY_OBJ_PKY.
The CMS_STR_MY_OBJ_PKY table consists of various fields, each holding specific information or linking keys about Primary Key for CMS_MY_OBJ data available in SAP. These include MY_OBJ_ID (Unique Identifier for My Objects)... 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. .