ABAP MODIFY DBTAB Statement syntax, information and example SAP source code

MODIFY dbtab

Short Reference

ABAP Syntax MODIFY target FROM source .

What does it do? The MODIFY statement inserts one or more rows specified in source in the database table specified in target , or overwrites existing rows.

System Fields
The statement MODIFY sets the values of the system fields
sy-subrc and sy-dbcnt .

sy-subrc Meaning
0When a work area was declared in source , the specified row was inserted or modified. When an internal table was specified in
source , all specified lines were inserted, modified, or the internal table is empty.
2When a LOB handle structure was specified with a component for writer streams , the non- LOB handle
components were not yet written to the database, but instead are passed when the stream is clased, at the latest. Whether this situation occurs or not depends on the database. Refer to LOB handle s .
4When a work area was specified in source , no rows were processed, or when an internal table was specified in source , not all specified rows were processed because there is already a row with the same unique secondary index in the database table.

The statement MODIFY sets sy-dbcnt to the number of processed rows. If an overflow occurs because the number or rows is greater than 2,147,483,647, sy-dbcnt is set to -1. If
sy-subrc is 2, sy-dbcnt is also set to the value -1 (for undefined).

Latest notes: The changes are committed to the database by the next database commit . Until that point, they can still be undone using a
database rollback
The statement MODIFY sets a
database lock until the next database commit or rollback. If used incorrectly, this can produce a deadlock
.
The number of rows that can be inserted or modified in the tables of a database within a database LUW is limited, since a database system can only manage a limited amount of locks and data in the rollback area.

Documentation extract taken from SAP system, � Copyright SAP AG. All rights reserved