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https://issues.apache.org/jira/browse/SPARK-31468?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Wenchen Fan resolved SPARK-31468.
---------------------------------
Fix Version/s: 3.0.0
Resolution: Fixed
Issue resolved by pull request 28241
[https://github.com/apache/spark/pull/28241]
> Null types should be implicitly casted to Decimal types
> -------------------------------------------------------
>
> Key: SPARK-31468
> URL: https://issues.apache.org/jira/browse/SPARK-31468
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.0.0
> Reporter: Takeshi Yamamuro
> Assignee: Takeshi Yamamuro
> Priority: Major
> Fix For: 3.0.0
>
>
> A query below fails in master/branch-3.0 and passed in v2.4.5;
> {code}
> scala> Seq(BigDecimal(10)).toDF("v1").selectExpr("v1 = NULL").explain(true)
> org.apache.spark.sql.AnalysisException: cannot resolve '(`v1` = NULL)' due to
> data type mismatch: differing types in '(`v1` = NULL)' (decimal(38,18) and
> null).; line 1 pos 0;
> 'Project [(v1#5 = null) AS (v1 = NULL)#7]
> +- Project [value#2 AS v1#5]
> +- LocalRelation [value#2]
> ...
> {code}
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