Github user x1- commented on the pull request:
https://github.com/apache/spark/pull/8339#issuecomment-133457237
@sarutak
I tried *casting Timestamp to Long and Long to Timestamp* using Hive below.
```sql
hive> SELECT CAST(CAST(1.2 AS TIMESTAMP) AS DOUBLE);
OK
1.2
Time taken: 3.637 seconds, Fetched: 1 row(s)
hive> SELECT CAST(CAST(1200 AS TIMESTAMP) AS INT);
OK
1
```
This mean that Hive has contradiction in converting Timestamp to Int, and
then Int to Timestamp.
Because of spark has different dialect, it is better way closing this PR, I
think.
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