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https://issues.apache.org/jira/browse/SPARK-31164?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Zhenhua Wang updated SPARK-31164:
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    Description: For a bucketed table, when deciding output partitioning, if 
the output doesn't contain all bucket columns, the result is 
`UnknownPartitioning`. But when generating rdd, current Spark uses 
`createBucketedReadRDD` because it doesn't check if the output contains all 
bucket columns. So the rdd and its output partitioning are inconsistent.  (was: 
For a bucketed table, when deciding output partitioning, if the output doesn't 
contain all bucket columns, the result is `UnknownPartitioning`. But when 
generating rdd, current Spark uses `createBucketedReadRDD` because it doesn't 
check if the output contains all bucket columns. So the rdd and it's output 
partitioning are inconsistent.)

> Inconsistent rdd and output partitioning for bucket table when output doesn't 
> contain all bucket columns
> --------------------------------------------------------------------------------------------------------
>
>                 Key: SPARK-31164
>                 URL: https://issues.apache.org/jira/browse/SPARK-31164
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.4.5, 3.0.0
>            Reporter: Zhenhua Wang
>            Priority: Major
>
> For a bucketed table, when deciding output partitioning, if the output 
> doesn't contain all bucket columns, the result is `UnknownPartitioning`. But 
> when generating rdd, current Spark uses `createBucketedReadRDD` because it 
> doesn't check if the output contains all bucket columns. So the rdd and its 
> output partitioning are inconsistent.



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