ABAP透明表里的時(shí)間戳，數(shù)據(jù)類型為dec：

有個(gè)需求：計(jì)算這兩個(gè)時(shí)間戳之間的天數(shù)間隔，丟棄時(shí)間戳年-月-日8位后面的小時(shí)：分鐘：秒。

舉個(gè)例子：如果時(shí)間戳是20180918173132，丟棄173132，只保留20180918, 然后再計(jì)算天數(shù)間隔。

直接用CDS view的字符串操作函數(shù)substring是不行的，因?yàn)闀r(shí)間戳類型dec和substring期待的字符串類型不匹配。

解決方案：

先將時(shí)間戳字段類型從dec強(qiáng)制轉(zhuǎn)換成abap.dats：

@AbapCatalog.sqlViewName: 'zproday'@AbapCatalog.compiler.compareFilter: true@AccessControl.authorizationCheck: #CHECK@EndUserText.label: 'Day between'define view zdate_day_between as select from comm_product {key comm_product.product_id as prod_id,comm_product.product_guid as prod_guid,comm_product.valid_from as valid_from,comm_product.valid_to as valid_to,cast(substring(cast(valid_from as abap.char(32)),1,8) as abap.dats) as from_date,cast(substring(cast(valid_to as abap.char(32)),1,8) as abap.dats) as to_date}

然后再用CDS view標(biāo)準(zhǔn)的時(shí)間處理函數(shù)DATS_DAYS_BETWEEN:

@AbapCatalog.sqlViewName: 'zdbetw'@AbapCatalog.compiler.compareFilter: true@AccessControl.authorizationCheck: #CHECK@EndUserText.label: 'Day between'define view zc_date_day_between as select from zdate_day_between as host{key host.prod_guid,host.prod_id,host.from_date,host.to_date,DATS_DAYS_BETWEEN(host.from_date, host.to_date) as no_of_days}

測(cè)試結(jié)果：

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