ABAP-二分法搜索(BINARY SEARCH) SORTGL_DATA_SO1[]BYVBELN_SO1 POSNR_SO1. READ TABLEGL_DATA_SO1WITH KEYVBELN_SO1=GN_DATA_SO1-VBELN_SO1 POSNR_SO1=GN_DATA_SO1-POSNR_SO1BINARY SEARCH. 值得注意的是进行二分法搜索之前一定要根据read的搜索键对内表进行排序,否则会导致搜索失败 如果将排序注释...
ABAP READ TABLE使用BINARY SEARCH如题,read table使用binary search,with key有多个字段的时候,寻找数据的内部逻辑是怎样的比如有内表(按A,B已排好序)T_DATAA B C1 1 11 2 22 1 32 2 42 3 53 1 63 2 73 3 8现在用如下语句查找READ TABLE T_DATA INTO W_DATA WITH KEY A='2' B = '3' BINA...
在使用binary search之前必须首先将内表排序,否则有可能找不到记录,因为二分查找反复将查找区间对半划分,如果要查找的值小于查找区间的中间位置的数据项值,则查找区间将缩小到前半个区间,否则查找将局限于后半区间。要了解更多的关于二分查找算法介绍,请点击这里。
read之前一定要排序,按照read的KEY字段进行排序,否则就可能取不到。 READ 不加BINARY SEARCH的取数逻辑, 其实是取第一笔数据
二分法检索（binary search）又称折半检索，其基本思想是设字典中的元素从小到大有序地存放在数组（array）中：首先将给定值key与字典中间位置上元素的关键码(key)比较，如果相等，则检索成功；否则，若key小，则在字典前半部分中继续进行二分法检索;若key大，则在字典后半部分中继续进行二分法检索。这样...
3'的数据，如果有多条满足条件的数据，则返回内表中满足条件的索引最小的一条。在做二分查找之前，需要先对内表以查找的字段顺序进行升序排序，也就是说，在你的例子中用二分查找之前要对内表按A、B的顺序进行排序，即 SORT T_DATA[] BY A B ASCENDING.否则不一定能查找到正确的确结果 ...
SAP Managed Tags: ABAP Testing and Analysis Hi Ram, While using the binary search we should mention the proper kwys else performance will be down. In the first method record can be fetch based on the primary key kunnr. In the second method record can be fetch based on the primary as...
SAP Managed Tags: ABAP Development Hi Balu, If you read entries from standard tables using a key other than the default key, you can use a binary search instead of the normal linear search. To do this, include the addition BINARY SEARCH in the corresponding READ statements. READ TABLE ...
SAP Managed Tags: ABAP Testing and Analysis before using BINARy SEARCH the internal table must be SORTed on the fields which we are using in READ statement. Now binary search looks the middle record in the internal table. if the KEY is less than the middle record then it will take first...
SAP Managed Tags: ABAP Development hi, binary search will always return the first record in the internal table matching the search criteria. you can sort table by char or number or numeric fields and binary search will always return the first record if there are duplicates Reply Former Membe...