internal table declarations

[Former Member]

hi,

please see these declarations, also in debugging screen, I see differentely

data: it_mara like mara,

it1_mara like standard table of mara,

it2_mara like standard table of mara with header line,

it3_mara like mara occurs 0 with header line.

is there any difference in it2_mara and it3_mara, which is the right way to declare in modern ABAP.

Also, I have noted that technically we should say internal table only when it is having a header line, Is this right ??

As I see table ICON in debugging only ITAB with header line only, some times it just say 'Table [initial]' and some time is show values.

how is the difference, please let me know.

thank you

regards

madhu

[Former Member]

Correct form should be this one...

DATA: it1_mara type standard table of mara.

<i>with header line</i> and <i>occurs 0</i> are forbidden on OO ABAP...Internal tables shouldn't have header lines...

When <i>Initial</i> it's because there's no record inside the table...Also, it have been created but nothing attached to it -:)

Greetings,

Blag.

[Former Member]

madhu,

OCCURS 0 specifies that it is an internal table which as 0 lines allocated to memory, and the HEADER LINE, means that there is an implicit header line or work area, so you do not need to create a separate explicit workarea in which to read the data into.

in simple words.....

occurs provide initial memory... if u want to give more memory then occurs 1 or 2 or 3 also u can give..

with header line.. with it provides a work area which u dont need to create again.