BUF_MCHPV 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 "Batch Record: Buffer Table for Versions" 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_BUF_MCHPV TYPE BUF_MCHPV.
The BUF_MCHPV table consists of various fields, each holding specific information or linking keys about Batch Record: Buffer Table for Versions data available in SAP. These include MATNR (Material Number), EBRID (Batch record number), VERSION (Version of a Batch Record), WERKS (Plant)... 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. .