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https://issues.apache.org/jira/browse/HIVE-23129?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17073624#comment-17073624
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Renukaprasad C commented on HIVE-23129:
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java.time.LocalDate.parse(CharSequence, DateTimeFormatter)
This Java API is being used to convert the date, this internally add the excess
months (>12) as year and remaing months gets converted (months % 12).
This same applies to date also.
LocalDate.parse("2020-1-36", PARSE_FORMATTER);
Results to - 2020-02-05
If required to handle, date validation should be done from hive side.
> Cast invalid string to date returns incorrect result
> ----------------------------------------------------
>
> Key: HIVE-23129
> URL: https://issues.apache.org/jira/browse/HIVE-23129
> Project: Hive
> Issue Type: Bug
> Affects Versions: 3.1.2
> Reporter: Yuming Wang
> Priority: Major
>
> {noformat}
> hive> select cast('2020-20-20' as date);
> OK
> 2021-08-20
> Time taken: 4.436 seconds, Fetched: 1 row(s)
> {noformat}
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