What is meant by parallel cursor

Question

hi
what is meant by parallel cursor

Answer 1

Hi,
  Parallel cursor is the technique to increase the perforamance of the program. For example if we use nested select in our program instead of For all entries addition, then definetly performance going down. In the same way the if we use nested loops in the program it will also leads to down the performance.
  I will give you one example like take billing document header details in one table and item details in other table let say the header table have 1000 records and the item table have 1 lakh records. If you want to make an output then you need to put nested loops first loop at header table then next loop at item table. For each entry of header record the item table loops 1 lakh times. calculate the total. so instead of we develop parallel cursor technique,, see the belwo code..
Loop at header.
read table item with key number = header-number.
if sy-subrc = 0.
loop at item from sy-tabix.
if item-number <> header-number.
exit.
else.
do some process here.
endif.
endloop.
endif.
endloop.
First the item table is read using the read table statement for getting the exact index number where the document number reside. if found then loop through the item table from that index upto item- number <> header-number.
Rgds,
Bujji
Edited by: Bujji on Jun 26, 2008 12:48 PM