UPC_NODES is a standard SAP Table which is used to store Hierarchy Node data in SAP systems, such as SAP R/3, S/4HANA, depending on the version and release level.
The UPC_NODES table consists of various fields, each holding specific information or linking keys about Hierarchy Node data available in SAP. These include GUID (UUID in compressed form (22 character UUENCODEd)), FIELDNAME (Field Name), HIENM (Hierarchy), HIEVER (Hierarchy Version)... 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. .