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https://issues.apache.org/jira/browse/SPARK-26251?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16708129#comment-16708129
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Hyukjin Kwon commented on SPARK-26251:
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Why does it should pick "po box 7896"?
> isnan function not picking non-numeric values
> ---------------------------------------------
>
> Key: SPARK-26251
> URL: https://issues.apache.org/jira/browse/SPARK-26251
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.4.0
> Reporter: Kunal Rao
> Priority: Minor
>
> import org.apache.spark.sql.functions._
> List("po box 7896", "8907",
> "435435").toDF("rgid").filter(isnan(col("rgid"))).show
>
> should pick "po box 7896"
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