Sorted dynamic partition optimization doesn't work if plan require implicit cast

drop table if exists t1_staging;
create table t1_staging(
                           a string,
                           b int,
                           c int,
                           d string)
    partitioned by (e  decimal(18,0))
    clustered by(a)
        into 256 buckets STORED AS TEXTFILE;
load data local inpath '../../data/files/sortdp/000000_0' overwrite into table t1_staging partition (e=100);

drop table t1_n147;
create table t1_n147(
                        a string,
                        b decimal(6,0),
                        c int,
                        d string)
    partitioned by (e decimal(3,0))
    clustered by(a,b)
        into 10 buckets STORED AS ORC TBLPROPERTIES ('transactional'='true');

set hive.stats.autogather=false;
set hive.optimize.bucketingsorting = true;
explain insert overwrite table t1_n147 partition(e) select a,b,c,d,e  from t1_staging;