COMT_PRODUCT_IDMAP 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 "Product: Mapping Between External and Internal ID" 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_COMT_PRODUCT_IDMAP TYPE COMT_PRODUCT_IDMAP.
The COMT_PRODUCT_IDMAP table consists of various fields, each holding specific information or linking keys about Product: Mapping Between External and Internal ID data available in SAP. These include PRODUCT_TYPE (Product Type), LOGSYS (Original System), OBJECT_FAMILY (Object Family), PRODUCT_GUID (Internal Unique ID of Product)... 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. .