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https://issues.apache.org/jira/browse/SPARK-44512?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yiu-Chung Lee updated SPARK-44512:
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Summary: dataset.sort.select.write.partitionBy does not return a sorted
output (was: dataset.sort.select.write.partitionBy does not return a sorted
output if AQE is enabled)
> dataset.sort.select.write.partitionBy does not return a sorted output
> ---------------------------------------------------------------------
>
> Key: SPARK-44512
> URL: https://issues.apache.org/jira/browse/SPARK-44512
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 3.4.1
> Reporter: Yiu-Chung Lee
> Priority: Major
> Labels: correctness
>
> (In this example the dataset is of type Tuple3, and the columns are named _1,
> _2 and _3)
>
> I found then when AQE is enabled, the following code does not produce sorted
> output (.drop() also have the same problem)
> {{dataset.sort("_1")}}
> {{.select("_2", "_3")}}
> {{.write()}}
> {{.partitionBy("_2")}}
> {{.text("output");}}
>
> However, if I insert an identity mapper between select and write, the output
> would be sorted as expected.
> {{dataset = dataset.sort("_1")}}
> {{.select("_2", "_3");}}
> {{dataset.map((MapFunction<Row, Row>) row -> row, dataset.encoder())}}
> {{.write()}}
> {{{}.{}}}{{{}partitionBy("_2"){}}}
> {{.text("output")}}
> Below is the complete code that reproduces the problem.
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