FILTR 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 "Filter Criteria for Project Reporting" 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_FILTR TYPE FILTR.
The FILTR table consists of various fields, each holding specific information or linking keys about Filter Criteria for Project Reporting data available in SAP. These include ECKENR (Basic finish date (relative to today's date)), PROGSTR (Forecast start date (relative to today's date)), PROGENR (Forecast finish date (relative to today's date)), TESTFRR (Earliest scheduled start (Basic; relative to today's date))... 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. .