UPP_YS_CODE 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 "Planning Processor: Structure of Table for Generated Code" 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_UPP_YS_CODE TYPE UPP_YS_CODE.
The UPP_YS_CODE table consists of various fields, each holding specific information or linking keys about Planning Processor: Structure of Table for Generated Code data available in SAP. These include LINE (Line in generated coding -> see long text)... 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. .