CMDC0_4_ALV 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 "Structure for SD_CMDC0" 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_CMDC0_4_ALV TYPE CMDC0_4_ALV.
The CMDC0_4_ALV table consists of various fields, each holding specific information or linking keys about Structure for SD_CMDC0 data available in SAP. These include KSCHL (Condition Type), VAKEY (Variable key 100 bytes), DKNUMA (Agreement (subsequent settlement)), REMARK (Error message text - long text of the error)... 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. .