GRFN_S_JOIN_CONDITION 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 "Join Condition" 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_JOIN_CONDITION TYPE GRFN_S_JOIN_CONDITION.
The GRFN_S_JOIN_CONDITION table consists of various fields, each holding specific information or linking keys about Join Condition data available in SAP. These include FIELDNAME (Name of the field to be checked), FORTABLE (Table of the foreign key field), FORKEY (Names of Foreign Key Fields)... 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. .
