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https://issues.apache.org/jira/browse/SPARK-23192?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Xiao Li updated SPARK-23192:
----------------------------
Fix Version/s: (was: 2.3.1)
2.3.0
> Hint is lost after using cached data
> ------------------------------------
>
> Key: SPARK-23192
> URL: https://issues.apache.org/jira/browse/SPARK-23192
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.2.1, 2.3.0
> Reporter: Xiao Li
> Assignee: Xiao Li
> Priority: Critical
> Fix For: 2.3.0
>
>
> The hint of the plan segment is lost, if the plan segment is replaced by the
> cached data.
> {noformat}
> val df1 = spark.createDataFrame(Seq((1, "4"), (2, "2"))).toDF("key",
> "value")
> val df2 = spark.createDataFrame(Seq((1, "1"), (2, "2"))).toDF("key",
> "value")
> df2.cache()
> val df3 = df1.join(broadcast(df2), Seq("key"), "inner")
> {noformat}
> Hint is lost in {{df3}}. The physical join algorithm will not respect the
> hint due to the loss.
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