topic Re: internal table syntax in Application Development and Automation Discussions

internal table syntax

Former Member — Mon, 19 Mar 2007 13:50:59 GMT

data: begin of itab occurs 0

What does 0 signify here ?

Re: internal table syntax

Former Member — Mon, 19 Mar 2007 13:54:21 GMT

Hi,

Occurs 0 ---> By default no memory allocation to the itab. The Allocation will be dynamically done at run time.

Occurs N ---> By default it will be allocated of Size N.

N indicates the approximate no. of rows in the internal table. This is not good Practice in case of performance.

for better performance use occurs 0.

For more information, please check this link.

http://help.sap.com/saphelp_47x200/helpdata/en/fc/eb3646358411d1829f0000e829fbfe/content.htm

Regards,

Ferry Lianto

Re: internal table syntax

Former Member — Mon, 19 Mar 2007 13:54:41 GMT

When appending or inserting a new record into the internal table, an extra space of So many records is allocated in the memory.

In this case the memory is allocated as and when the new record is allocated.

its is occurs 4, then for every 4th record, an extra space that is sufficient for holding 4 new records is allocated.

Regards,

Ravi

Re: internal table syntax

Former Member — Mon, 19 Mar 2007 13:56:30 GMT

Hi,

Internal tables are run time tables;

Memory allocation will be done automatically depending up on the data coming to internal tables:

when you declare 0 it starts from taking a lower memory and starts by taking extra memory of 8 MB like that as per the requirement.

you can give occurs 1000 also, if you feel that huge data will be populated in your internal table.

So instead of fixing/asking /allocating the fixed memory to the internal table initilaly, if we declare as occurs 0 it will take the memory reasonably and utilise correctly.

reward if useful

regards,

Anji

Re: internal table syntax

Laxmana_Appana_ — Mon, 19 Mar 2007 13:56:52 GMT

Hi,

Check this link:

http://help.sap.com/saphelp_nw04/helpdata/en/fc/eb3646358411d1829f0000e829fbfe/content.htm

Regards

L Appana

Re: internal table syntax

Former Member — Mon, 19 Mar 2007 13:57:42 GMT

occurs 0 -

> Initially memory allocated for Zero records , later on depending on the no of records memory will be increased

occurs 100 -

> Initially memory allocated for 100 records , later on depending on the no of records memory will be increased