COMT_HIERARCHY_UPDATE 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 "Update Information Hierarchies" 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_COMT_HIERARCHY_UPDATE TYPE COMT_HIERARCHY_UPDATE.
The COMT_HIERARCHY_UPDATE table consists of various fields, each holding specific information or linking keys about Update Information Hierarchies data available in SAP. These include UPDATE_TYPE (Type of Change)... 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. .