topic Re: occurs in Application Development and Automation Discussions

occurs

Former Member — Mon, 21 Aug 2006 17:03:28 GMT

what is the diff between OCCURS 0 and OCCURS 1 while creating internal tables?

Re: occurs

sridhar_k1 — Mon, 21 Aug 2006 17:05:43 GMT

Occurs 0 does not reserve space for the itab at the time of declaration, and occurs 1 reserves 1 line when the itab is declared.

Regards

Sridhar

Re: occurs

Former Member — Mon, 21 Aug 2006 17:06:07 GMT

Occurs 0 creates an internal table with no rows at the time of creation. OCCURS 1 creates a table with 1 physical row at creation time.

Re: occurs

RichHeilman — Mon, 21 Aug 2006 17:08:18 GMT

OCCURS 1 actually allocates memory space for 1 line of the internal table. OCCURS 0 allocates no memeory space when the internal table is created. The memeory space is allocated when filling the internal table.

Really, you should not be using the OCCURS extension when defining internal tables as it is obselete. You should define a type instead.

Types: begin of ttab,
       fld1 type c,
       end of ttab.

data: itab type table of ttab.
data: wa like line of itab.

REgards,

Rich Heilman

Re: occurs

uwe_schieferstein — Mon, 21 Aug 2006 22:45:34 GMT

Hello Sudharasan

As Rich Heilman already said itab's with header lines are obsolete.

For me, using itab's with header lines is worst ABAP programming possible because these programs are a mess to read and understand. Such programs are highly error-prone when it comes to maintaining.

Regards

Uwe

Re: occurs

abdul_hakim — Mon, 21 Aug 2006 22:51:44 GMT

occurs 0-->No memory allocated at the time of cretion

occurs 1-->Memory alloted to a line at the time of creation.

Note:Interal table with header lines are oldest form of

internal tables.

Cheers,

Abdul Hakim

Re: occurs

Former Member — Tue, 22 Aug 2006 06:14:53 GMT

good

there is besically no difference between the occurs 0 and occurs 1 both of them acquire the same memory.If you know the exact amount of that that you r going to fetch from the database than give the same number with occurs otherwise it doesnot make any difference wheather you give occur 0 or 1, even though you r taking less amount of data it ll use the same memory area.

thanks

mrutyun