ABAP性能优化

1.使用二分法查询，提高查询内表数据速度
不推荐
Read table int_fligh with key airln = ‘LF’.
推荐
Read table int_fligh with key airln = ‘LF’ binary search.

2.两个内表添加使用批量增加代替逐行
不推荐
Loop at int_fligh1.
Append int_fligh1 to int_fligh2.
Endloop.
推荐
Append lines of int_fligh1 to int_fligh2.

3.使用FOR ALL Entries
不推荐
Loop at int_cntry. Select single * from zfligh into int_fligh where cntry = int_cntry-cntry. Append int_fligh. Endloop.
推荐
Select * from zfligh appending table int_fligh
For all entries in int_cntry
Where cntry = int_cntry-cntry.