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https://issues.apache.org/jira/browse/SPARK-27791?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16852870#comment-16852870
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Zhu, Lipeng commented on SPARK-27791:
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[~yumwang]
I think it should be
{code:sql}
select current_date - interval '1-1' year_month
{code}
> Support SQL year-month INTERVAL type
> ------------------------------------
>
> Key: SPARK-27791
> URL: https://issues.apache.org/jira/browse/SPARK-27791
> Project: Spark
> Issue Type: Sub-task
> Components: SQL
> Affects Versions: 2.4.0
> Reporter: Maxim Gekk
> Priority: Major
>
> The INTERVAL type must conform to SQL year-month INTERVAL type, has 2 logical
> types:
> # YEAR - Unconstrained except by the leading field precision
> # MONTH - Months (within years) (0-11)
> And support arithmetic operations involving values of type datetime or
> interval.
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