Github user anabranch commented on the issue:
https://github.com/apache/spark/pull/16138
@cloud-fan - Reynold referred me to your for this test failure.
My two tests are failing because Hive tests *allegedly* cover something
like this.
```
SELECT to_date('2001-10-30 10:30:00', '')
```
However, Hive doesn't support passing in multiple parameters to `to_date`
as specified in the [language
manual](https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF#LanguageManualUDF-DateFunctions).
The only instance I see for `to_date` with multiple parameters is [when it
talks to ORACLE DB as the
metastore](https://github.com/apache/hive/blob/2d813f4d4a0bb42345d153c362f7416f05ab2749/metastore/src/java/org/apache/hadoop/hive/metastore/MetaStoreDirectSql.java#L1122)
although I don't know the code base (I grepped for `to_date` and tried to find
instances of this occurring).
It seems like this test case should not be running in the first place. Can
you advise on any suggestions you might have?
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