ESH_S_TREX_REQUEST 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 "TREX query for Enterprise Search" 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_ESH_S_TREX_REQUEST TYPE ESH_S_TREX_REQUEST.
The ESH_S_TREX_REQUEST table consists of various fields, each holding specific information or linking keys about TREX query for Enterprise Search data available in SAP. These include REQUEST (Request Type ID), HANDLE_NAME (), INDEX_ID (Index Id), LANGUAGE ()... 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. .