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https://issues.apache.org/jira/browse/SPARK-22894?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16302562#comment-16302562
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Apache Spark commented on SPARK-22894:
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User 'wangyum' has created a pull request for this issue:
https://github.com/apache/spark/pull/20067
> DateTimeOperations should accept SQL like string type
> -----------------------------------------------------
>
> Key: SPARK-22894
> URL: https://issues.apache.org/jira/browse/SPARK-22894
> Project: Spark
> Issue Type: Improvement
> Components: SQL
> Affects Versions: 2.3.0
> Reporter: Yuming Wang
>
> {noformat}
> spark-sql> SELECT '2017-12-24' + interval 2 months 2 seconds;
> Error in query: cannot resolve '(CAST('2017-12-24' AS DOUBLE) + interval 2
> months 2 seconds)' due to data type mismatch: differing types in
> '(CAST('2017-12-24' AS DOUBLE) + interval 2 months 2 seconds)' (double and
> calendarinterval).; line 1 pos 7;
> 'Project [unresolvedalias((cast(2017-12-24 as double) + interval 2 months 2
> seconds), None)]
> +- OneRowRelation
> spark-sql>
> {noformat}
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