EVE_TS_ITERATOR_DB 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 "Iterator: DB Fields" 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_EVE_TS_ITERATOR_DB TYPE EVE_TS_ITERATOR_DB.
The EVE_TS_ITERATOR_DB table consists of various fields, each holding specific information or linking keys about Iterator: DB Fields data available in SAP. These include ROOT_OBJECT_TYPE (Root Object Type for Evaluation Engine)... 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. .