Modify DB in chunk

Question

HI All ,
I have large internal table (like 1000000 records ) and i want to modify DB table from it ,
what i want is to do the modify in chunk i.e. to do commit after 1000 recorded each time .
what is the best way to do that ?
Regards
Chris

Answer 1

Hi
I have some additional questions ,
1. to do the modify in chunk it is good approach ?
MODIFY is INSERT+UPDATE, that means if a record in internal table doesn't exist it'll be inserted: that can be or can't be a risk: I don't know your goal.
I prefer to use UPDATE if I needs to update existing record only, so if perpahs a wrong record is loaded in the internal table it won't be inserted, and so I can avoid to do a select to check if a record exists or doesn't exists.
But if you doesn't need to care about it and so u need to insert and update a record: MODIFY is better.
2. i use modify from table in my program do i need to do read before update and just to modify the changes records
This is the concept below: if you need to change the existing records only, u make sure the record uploaded in the internal tables are in dictionary table too: how to do it depends on your program, i.e. how u've uploaded them, else u should check it before using MODIFY
3. the DO statements is not risky (like go to infinite loop ).
Every time a do cycle is used it needs to use a condition exit: in my sample I've used a counter... else a infinite loop is sure.
Max