p2 {TYPE itab_type} | {
STRUCTURE struc } [OPTIONAL]
...
What does it do? Defines the table
parameters t1 t2 ... in the function module
interface display in the source text of function modules. Table
parameters are obsolete CHANGING parameters that are typed as
standard tables with a
header line . If an internal table without
a header line or a table body is passed as
an actual parameter to a formal parameter of this type, an empty local
header line is generated in the function module. If an internal table
with a header line is used as an actual parameter, both the table body
and the header line are passed to the function module. Pass by value is
not possible in formal parameters defined using TABLES .
For information on the TYPE , STRUCTURE and OPTIONAL
, see Properties of the Interface
Parameters . The following special rules apply to table parameters:
Only pass by reference is allowed
in TABLES parameters.
After TYPE , only one table type itab_type from ABAP
Dictionary (including type groups) with the table category standard
table with a flat row type can be specified.
A type with TYPE REF TO is not permitted.
In non-Unicode programs , typings
using STRUCTURE do not have to match the line length of the
actual parameter, but do have to be at least the length of the
structure.
When TABLES parameters are accessed that are not bound to any
type-compliant actual parameters, a special
exception situation can
arise.
Latest notes: Formal parameters defined with TABLES can be
replaced by formal parameters defined with CHANGING . A local work
area can be created for the internal table in the function module by
using the addition LIKE LINE OF itab of the DATA
statement.
Exception
Provided that basXML is not set as
the RFC log , using TABLES parameters for
remote-enabled function modules
for RFC can be significantly faster than
passing by means of the CHANGING parameter.
Documentation extract taken from SAP system, � Copyright SAP AG. All rights reserved