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