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Archive for March 9, 2008
ABAP tips: binary search
March 9, 2008 by 宝妈.
在read table的时候，为了提高查找内表的效率，通常使用二分法查找，即binary search。但是使用这个关键字有一个小tip：
查找对象和被查找对象的关键字或关键字组合必须是相同的，且排列顺序也要相同。
Eg：
loop it_A.
read table it_B with key date = lt_A-date2
matnr = lt_A-matnr2
BINARY SEARCH.
endloop.
在此之前，必须 sort it_A by date matnr. 和Sort it_B by date2 matnr2. 两个关键字都要sort，且不能一个升序，一个降序。
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