internal table

[Former Member]

hi all,

An internal table that is nested within another internal table should not contain a header line.

is it true or false?pls explain.

thank u

sunny.

[Former Member]

false... u can have both as with header line...

[Former Member]

u mean nested means looping or reading a internal table with in a loop of an internal table?

[Former Member]

yes

[Former Member]

yes chandrika..

[Former Member]

u can use header line then.

for ex: loop at itab1 into wa_itab1.

read table itab2 into wa_itab2 where condition.

Reward if helpful.

[matt]

If you have an internal table which has a component which is itself an internal table - a nested table - it is not possible to for the inner table to have a header-line. The syntax of defining tables does n't allow for it

...EDIT... It never used to be possible!

TYPES: BEGIN OF line_ty,
         field1 TYPE field1,
         field2 TYPE field2,
         nested_table TYPE STANDARD TABLE OF sometype WITH NON-UNIQUE KEY TABLE_LINE,
       END OF line_ty.

DATA: my_itab TYPE line_ty OCCURS 0.

...EDIT... the below is still true, however.

( It is not, in any case, advisable to use tables with header lines, as then you have ambiguity between whether my_itab refers to the table or the header line - and in programming, ambiguity is BAD ).

matt

Edited by: Matthew Billingham on May 27, 2008 1:58 PM

Got bits wrong!

[Former Member]

Hi,

Check this example..

DATA: BEGIN OF WA,

WERKS TYPE WERKS_D,

END OF WA.

DATA: BEGIN OF ITAB1 OCCURS 0,

MATNR TYPE MATNR,

ITAB_NESTED LIKE WA OCCURS 0,

END OF ITAB1.

DATA: ITAB2 LIKE WA OCCURS 0 WITH HEADER LINE.

ITAB1-MATNR = 'TEST'.

ITAB2-WERKS = 'ASDF'.APPEND ITAB2.

ITAB2-WERKS = 'ADDD'.APPEND ITAB2.

ITAB1-ITAB_NESTED] = ITAB2[.

APPEND ITAB1.

LOOP AT ITAB1.

LOOP AT ITAB1-ITAB_NESTED INTO WA.

WRITE: / WA-WERKS.

ENDLOOP.

ENDLOOP.

Reward points if useful

[Former Member]

Hi,

It should have headerline or work area, otherwise you cannot use where condition in the inner loop.

Thanks,

Sriram Ponna,.

[Former Member]

Hi Sunny!!

No doubt u can use internal tables wid header line even widin a loop..bt its obsolete n performance wise nt better to use header line.

Instead use TYPES,thn declare data and work area and thn use ur inter table wid header line.

for ex:

loop at itab into wa_itab.

write wa_itab

endloop.

reward if useful.

[Former Member]

u can have headerline declared for the inner internal table