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https://issues.apache.org/jira/browse/SPARK-38341?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17773146#comment-17773146
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Wenchen Fan commented on SPARK-38341:
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It seems like a common behavior to preserve the end-of-month information, see
also https://issues.apache.org/jira/browse/SPARK-38341
[~maxgekk] can you take a look? This is probably caused by the switch to java 8
time API.
> Spark sql: 3.2.1 - Function of add_ Months returns an incorrect date
> --------------------------------------------------------------------
>
> Key: SPARK-38341
> URL: https://issues.apache.org/jira/browse/SPARK-38341
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.2.1
> Reporter: davon.cao
> Priority: Major
>
> Step to reproduce:
> Version of spark sql: 3.2.1(latest version in maven repository)
> Run sql:
> spark.sql("""SELECT ADD_MONTHS(last_day('2020-06-30'), -1)""").toPandas()
> expect: 2020-05-31
> actual: 2020-05-30 (x)
>
> Version of spark sql: 2.4.3
> spark.sql("""SELECT ADD_MONTHS(last_day('2020-06-30'), -1)""").toPandas()
> expect: 2020-05-31
> actual: 2020-05-31 (/)
>
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