CMP_ITEM_DATA_ALV_FC 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 "Field Catalog for Complaints Processing ALV Display" 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_CMP_ITEM_DATA_ALV_FC TYPE CMP_ITEM_DATA_ALV_FC.
The CMP_ITEM_DATA_ALV_FC table consists of various fields, each holding specific information or linking keys about Field Catalog for Complaints Processing ALV Display data available in SAP. These include MATNR (Material Number), ARKTX (Short text for sales order item), AUART (Sales Document Type), FKART (Billing Type)... 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. .