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ABENMESH_MODIFY - MESH MODIFY

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MODIFY mesh_path

MODIFY ${ TABLE mesh_path $[USING KEY keyname$]
                         FROM wa
                         $[TRANSPORTING comp1 comp2 ...$]
                         result $}
     $| ${ mesh_path FROM wa
                   $[TRANSPORTING comp1 comp2 ...$] $}.

Variants:

1. MODIFY TABLE mesh_path FROM wa ...

2. MODIFY mesh_path FROM wa ...

Addition:

... TRANSPORTING comp1 comp2 ...

Effect

Modifies one or more lines in the last path node of a mesh path mesh_path. In the line or lines described by the mesh path, the following columns are assigned the corresponding values from the work area wa:

• If the optional addition TRANSPORTING is not specified, all columns are modified

• that are not in the ON condition of the mesh association used,

• that are no part of the primary key of the last path node, if the table is a sorted table or a hashed table.

• If the optional addition TRANSPORTING is specified, the columns listed after it are modified

wa expects a structure that is compatible with the line type of the last path node. No key fields of primary or secondary table keys in the last path node can be overwritten. The return code sy-subrc is set in the same way as in the corresponding statement MODIFY itab.

Note

It should be noted that the addition TABLE is highly significant for directly specified internal tables, as in MODIFY, and distinguishes different variants of statements from each other.

Variant 1

MODIFY TABLE mesh_path FROM wa ...

Effect

Modifies exactly one line in the follow-on node of an initial mesh association. In this variant, no path extensions can be specified, and the square brackets of the initial mesh association cannot contain any additional conditions. The line to be modified is determined using the table key used:

• If the ON condition of the mesh association used covers all key fields of the table key it uses, the line to be modified is determined using the result of the mesh path. However, only those fields of the ON condition are respected that are also key fields.

• If the ON condition of the mesh association used does not cover the key fields of the table key it uses, the missing key fields are taken from the associated components of the work area wa.

The line is modified in accordance with the rules of MODIFY. If the follow-on node contains multiple lines that match the specified key, the first line found is modified. If the line to be modified is not found, nothing is modified. The key used can be specified using the addition USING KEY, just as in the statement MODIFY with directly specified internal table. result can be used to specify the output behavior.

Note

Columns of the follow-on node that are listed in the ON condition but are not part of the table key used are always ignored in this variant. This means that the line to be modified cannot be determined beyond the bounds of the table key.

Changing Single Lines in Mesh Paths

Variant 2

MODIFY mesh_path FROM wa ...

Effect

Modifies multiple lines in the last path node of a mesh path mesh_path. All lines in the last path node that are described by the result of the mesh path are modified. An additional condition can be specified in the square brackets [ ... ] of each mesh association of the mesh path using the additions USING KEY and WHERE log_exp. In the last mesh association, the addition USING KEY cannot be specified if it is specified after FROM wa.

Changing Multiple Lines in Mesh Paths

Addition

... TRANSPORTING comp1 comp2 ...

Effect

The same applies to the addition TRANSPORTING as to the statement MODIFY with directly specified internal table, with the restriction that no columns can be specified that are part of the primary key of the last path node if the table is a sorted table or hashed table.

Note

The TRANSPORTING addition can also be used to modify columns that are specified in the ON condition of the mesh association used.

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