topic Nested Loops Question in Application Development and Automation Discussions

Nested Loops Question

Former Member — Thu, 27 Mar 2008 22:48:01 GMT

Hi, I am new to ABAP and would like to know how to loop at two internal tables. The following is my scenario:

ITAB and ITAB_1 are internal tables with same data and the data is sorted on Fiscal Year Period. Now I want to do is as :

loop at ITAB.

loop at ITAB_1.

endloop.

During the first pass through ITAB, I should loop at ITAB_1 zero times. During the second pass through ITAB, I should loop at ITAB_1 1 time and so on. Basically I want to loop through all records in ITAB_1 that are just above my current record in ITAB.

How can I do this? Any ideas.

Thanks and regards.

Re: Nested Loops Question

Former Member — Fri, 28 Mar 2008 17:41:41 GMT

loop at itab1.

setup a field containing the current line index of the * * first table - 1

l-index = sy-tabix - 1.

check sy-tabix > 1.

loop at itab2 from 1 to l_index.

endloop.

Re: Nested Loops Question

rodrigo_paisante3 — Fri, 28 Mar 2008 17:55:40 GMT

Hi,

Searching in the forum for "nested loop" you will find useful tips like these:

/people/rob.burbank/blog/2006/02/07/performance-of-nested-loops

/people/siegfried.boes/blog/2007/09/12/runtimes-of-reads-and-loops-on-internal-tables

https://www.sdn.sap.com/irj/sdn/go/portal/prtroot/docs/library/uuid/40729734-3668-2910-deba-fa0e95e2c541

Hope it helps.