Github user jinxing64 commented on the issue:
https://github.com/apache/spark/pull/19602
@cloud-fan
I removed some cases in `ExtractAttribute`. But to make it clear, do you
mean that in below scenario, we don't prune partitions?
```
create table test(id int, string) partitioned by (dt string)
select count(1) from test where dt=20180101 -- HiveShim will get
EqualTo(Cast(dt as int), 20180101) and Cast.mayTruncate will return true for
this.
```
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