CKML2 is a standard SAP Table which is used to store Material Ledger Header Record (Release 3.xx) data in SAP systems, such as SAP R/3, S/4HANA, depending on the version and release level.
The CKML2 table consists of various fields, each holding specific information or linking keys about Material Ledger Header Record (Release 3.xx) data available in SAP. These include KALNR (Cost Estimate Number for Cost Est. w/o Qty Structure), MATLED (Material ledger type), BWKEY (Valuation Area), BWTAR (Valuation Type)... 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. .