我有这样的数据的数据帧:关于计算与数据的总金额时的精度损失帧
unit,sensitivity currency,trading desk ,portfolio ,issuer ,bucket ,underlying ,delta ,converted sensitivity
ES ,USD ,EQ DERIVATIVES,ESEQRED_LH_MIDX ,5GOY ,5 ,repo ,0.00002 ,0.00002
ES ,USD ,EQ DERIVATIVES,IND_GLOBAL1 ,no_localizado ,8 ,repo ,-0.16962 ,-0.15198
ES ,EUR ,EQ DERIVATIVES,ESEQ_UKFLOWN ,IGN2 ,8 ,repo ,-0.00253 ,-0.00253
ES ,USD ,EQ DERIVATIVES,BASKETS1 ,9YFV ,5 ,spot ,-1003.64501 ,-899.24586
,我有过这样的数据做一个聚合操作,做这样的事情:
val filteredDF = myDF.filter("unit = 'ES' AND `trading desk` = 'EQ DERIVATIVES' AND issuer = '5GOY' AND bucket = 5 AND underlying = 'repo' AND portfolio ='ESEQRED_LH_MIDX'")
.groupBy("unit","trading desk","portfolio","issuer","bucket","underlying")
.agg(sum("converted_sensitivity"))
但我看到,我所聚集的总和失去精度,所以我怎么能知道这一点的“converted_sensitivity”每个值做的和操作之前被转换为BigDecimal(25,5)在新的聚合列上?
非常感谢。
您可以执行映射操作来首先计算列的BigDecimal版本,然后在下一个操作中添加它们。我想这将介于.groupBy和.agg – Paul