GRFN_S_PROGRAM 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 "Query List for Program" 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_GRFN_S_PROGRAM TYPE GRFN_S_PROGRAM.
The GRFN_S_PROGRAM table consists of various fields, each holding specific information or linking keys about Query List for Program data available in SAP. These include BR_CATEGORY (Business rule category), BR_ANYSTYPE (Analysis type for business rule), BR_FDANYSTYPE (Business Rule Field Analysis Type), FILTER_TYPE (Type of a table or structure)... 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. .