[jira] [Commented] (SPARK-24705) Spark.sql.adaptive.enabled=true is enabled and self-join query

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

    [ https://issues.apache.org/jira/browse/SPARK-24705?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16528711#comment-16528711 ] 

cheng commented on SPARK-24705:
-------------------------------

For example, my query:
device_loc table comes from the jdbc data source

select tv_a.imei
 from ( select a.imei,a.speed from device_loc a) tv_a
 inner join ( select a.imei,a.speed from device_loc a ) tv_b on tv_a.imei = tv_b.imei
 group by tv_a.imei

When the cache tabel device_loc is executed before this query is executed, everything is fine,However, if you do not execute cache table, unexpected results will occur, resulting in failure to execute.




> Spark.sql.adaptive.enabled=true is enabled and self-join query
> --------------------------------------------------------------
>
>                 Key: SPARK-24705
>                 URL: https://issues.apache.org/jira/browse/SPARK-24705
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.3.1
>            Reporter: cheng
>            Priority: Minor
>
>   When loading data using jdbc and enabling spark.sql.adaptive.enabled=true , for example loading a tableA table, unexpected results can occur when you use the following query.



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