BAPIFRML_INPUT_POSX 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 "Change BAPI Structure Input Item General Data" 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_BAPIFRML_INPUT_POSX TYPE BAPIFRML_INPUT_POSX.
The BAPIFRML_INPUT_POSX table consists of various fields, each holding specific information or linking keys about Change BAPI Structure Input Item General Data data available in SAP. These include PRIMARYKEY (Updated information in related user data field), FLGPRIMKEY (Updated information in related user data field), FOREIGNKEY (Updated information in related user data field), FLGFRGKEY (Updated information in related user data field)... 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. .