ABAP Keyword Documentation → ABAP Glossary
standard key
Primary table key of an internal table, whose key fields in a structured row type are all table fields with character-like data types and byte-like data types. If the row type contains substructures, these are broken down into elementary components. The standard key for non-structured row types is the entire table row if the row type itself is not a table type. If there are no corresponding table fields, or the row type itself is a table type, the standard key from standard tables is empty or contains no key fields.