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ABAP Keyword Documentation →  ABAP - Reference →  Processing Internal Data →  Internal Tables →  Processing Statements for Internal Tables →  MODIFY itab 

MODIFY itab - itab_line

Short Reference

Other versions: 7.31 | 7.40 | 7.54


... { table_key  | index } FROM wa 
                          [TRANSPORTING comp1 comp2 ...]


... TRANSPORTING comp1 comp2 ...


In this variant, the statement MODIFY assigns the content of work area wa to a row specified by a table key in table_key or by a row number in index. wa is a general expression position.

Use TRANSPORTING to restrict the components comp to be modified. Use result when changing a single row to set a reference to the changed row in the form of a field symbol or a data reference.

For access using table keys, index access to sorted tables and when the addition TRANSPORTING is used, the wa work area must be compatible with the row type of the primary internal table. Only in the case of insertion using the table index in standard tables without the addition TRANSPORTING can wa be incompatible with the line type of the internal table, and is converted to the row type in accordance with the conversion rules. If an arithmetic expression is specified for wa, the row type of the internal table is respected when determining the calculation type.


  • Outside of classes, an obsolete short form is possible where FROM wa can be omitted if the internal table has a header line itab with the same name. The statement then uses the header line as the work area implicitly.
  • When modifying a row in a table, be mindful of table keys that are read only. While overwriting of protected key fields in the primary table key is not checked until runtime, this always results in a syntax error for the secondary table key. If a row whose secondary table key is read only is changed, FROM wa can therefore only be specified together with TRANSPORTING, and no key fields of the secondary key can be specified after TRANSPORTING.
  • Specifying a calculation expression for wa is usually only a good idea for elementary row types.


... TRANSPORTING comp1 comp2 ...


The addition TRANSPORTING has the effect that only the specified components comp1, comp2, ... of the work area are assigned to the corresponding components of the row(s) to be changed. For sorted tables and hashed tables, no primary table key components may be declared after TRANSPORTING.

The components comp1, comp2, ... are specified in accordance with the rules specified in Specifying Components, with the constraint that, after TRANSPORTING, no attributes of classes can be addressed using the object component selector.


MODIFY itab - table_key

MODIFY itab - index

Internal tables, index assess with key specification - Example