Inserting records in the table

Question

Hi All,
I am working on a report where we are inserting huge numbers of records from an internal table to the ztable, I have been advised that rather than inserting all the records at one time we should divide the recods into small blocks may be let's say 100,000 of each block and try inserting the blocks in the ztable. So I was just wondering if anyone of you can help me with this how can I get this?
my internal table is it_data_table and my ztable is z_data_table.
Thanks,
Rajeev

Answer 1

Hi,
Rather than inserting records from the workarea it is better if you use the inetrnal table for insertion. If youu have say 50025 records than it will hit the database that many times which definitely is a performance issue.If you have an internal table say 'it' and another internal table 'it_temp' with a similiar structure, you can try something like as follows
loop at it.
  count = count + 1.
  it_temp = it.
  append it_temp.
  if count = 10000.
    insert ztable from table it_temp accepting duplicate keys.  "to avoid a dump if there are duplicates count = 0.
    refresh it_temp.
  endif.
endloop.
if it_temp is not initial.
  insert ztable from table it_temp accepting duplicate keys.
endif.
In the above code the loop will run the number of record times but, the insert statement will run only 50025/10000 times (i.e, 5 times). After the completion of the loop we need to add the remaining 25 records (because insert will work last inside the loop when 50000 records are reached), for that we will issue the insert statement after completion of the loop, after checking the it_temp table. So the total of 50025 records would be entered in a batch of 6 inserts rather than that many inserts if using just the workarea.
I hope this does help you in your issue.
Thanks and Regards,
Sachin.