E2SUPER 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 "Class hierarchy" 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_E2SUPER TYPE E2SUPER.
The E2SUPER table consists of various fields, each holding specific information or linking keys about Class hierarchy data available in SAP. These include SUBOBJID (Internal counter for objects in an SCE knowledge base), SUPOBJID (Internal counter for objects in an SCE knowledge base), POSNR (Item number)... 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. .