BAPI_0038_FIELDS 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 "Single fields parameters for funded 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_BAPI_0038_FIELDS TYPE BAPI_0038_FIELDS.
The BAPI_0038_FIELDS table consists of various fields, each holding specific information or linking keys about Single fields parameters for funded program data available in SAP. These include GET_TEXT (Flag determining whether texts are read from database), MAXROWS (Maximum number of lines of hits)... 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. .