COMP_DEST 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 "Assign logical component to RFC destination" 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_COMP_DEST TYPE COMP_DEST.
The COMP_DEST table consists of various fields, each holding specific information or linking keys about Assign logical component to RFC destination data available in SAP. These include RFCDEST (Logical Destination (Specified in Function Call)), LOGSYS (Logical system), SYSYSID (Name of SAP System), SYMANDT (Client ID)... 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. .