PRSS_ROWCAT 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 "Row catalog" 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_PRSS_ROWCAT TYPE PRSS_ROWCAT.
The PRSS_ROWCAT table consists of various fields, each holding specific information or linking keys about Row catalog data available in SAP. These include NAME (30 Characters), COLPOS (Natural Number), EDITABLE (General Flag), VISIBLE (General Flag)... 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. .