tables

[Former Member]

Hi,

What are the performance difference between the internal table declared with and without header line?

Why should internal tables be declared without header line?

[Former Member]

Hi,

Main difference is the usuage of the memory allocated for internal table.

Internal table with headerline will allocates the memory as 8k,16k,32k,64k,128k,256k,512k,1024k,2048k.....etc.

Suppose one internal table has the data of capacity 1026k then system allocates 2048k memory to internal table. Half the amount of memory is not useful.

Internal table without headerline memory consumption is less compare to internal table with header line.

In ABAP WAS 6.20 after onwards internal table without headerline is obsolete.

Internal table without headerline requires an explicit workarea

[Former Member]

thx u,