[jira] [Assigned] (SPARK-24870) Cache can't work normally if there are case letters in SQL

["Apache Spark (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/SPARK-24870?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Apache Spark reassigned SPARK-24870:
------------------------------------

    Assignee:     (was: Apache Spark)

> Cache can't work normally if there are case letters in SQL
> ----------------------------------------------------------
>
>                 Key: SPARK-24870
>                 URL: https://issues.apache.org/jira/browse/SPARK-24870
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.3.1
>            Reporter: eaton
>            Priority: Major
>
> Cache can't work normally if there are case letters in SQL, 
> for example:
>  sql("CREATE TABLE IF NOT EXISTS src (key INT, value STRING) USING hive")
> sql("select key, sum(case when Key > 0 then 1 else 0 end) as positiveNum " +
>  "from src group by key").cache().createOrReplaceTempView("src_cache")
>  sql(
>  s"""select a.key
>  from
>  (select key from src_cache where positiveNum = 1)a
>  left join
>  (select key from src_cache )b
>  on a.key=b.key
>  """).explain
>  
> The subquery "select key from src_cache where positiveNum = 1" on the left of join can use the cache data, but the subquery "select key from src_cache" on the right of join cannot use the cache data.



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