SAP TABLE EXP LHS documentation, setup help and example usage

table_exp - Writer Positions
Table expressions and their chainings can be specified as writable expressions
in result positions . The result of a table expression in these positions is always a temporary field symbol.

If a single table expression is specified, or a chaining whose last position is a table expression, the entire row that was found is modified in the writer position.

If a chaining is specified whose last position is a structure component after a structure component selector, this component is modified in the writer position.

In the case of writes performed on the temporary field symbol, the same rules apply as to a field symbol assigned a table row using READ TABLE ASSIGNING . More specifically, the read-only character of key fields must be respected.

Note
The constructor operators VALUE and REF used to control the result of the table expression cannot be used in writer positions.

Example
See Table Expressions, Writer Position .