[
https://issues.apache.org/jira/browse/SPARK-61285?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
ASF GitHub Bot updated SPARK-61285:
-----------------------------------
Labels: pull-request-available (was: )
> Partition by range in DataFrame::repartition_by_range of the Rust API, as
> PySpark's repartitionByRange does
> -----------------------------------------------------------------------------------------------------------
>
> Key: SPARK-61285
> URL: https://issues.apache.org/jira/browse/SPARK-61285
> Project: Spark
> Issue Type: Bug
> Components: Connect
> Affects Versions: connect-rust-4.3.0
> Reporter: Tim Meehan
> Priority: Major
> Labels: pull-request-available
> Fix For: connect-rust-4.3.0
>
>
> DataFrame::repartition_by_range and repartition_by_range_opt of the Rust API
> send their columns as they are. The server range-partitions only on sort
> orders, so a plain column is hash-partitioned: the request is the one that
> repartition(4, col("id")) sends. PySpark's repartitionByRange wraps each
> column that is not a sort order in an ascending one, and so does the Python
> client of spark-connect-rust.
> {code:rust}
> // spark is a SparkSession of the spark-connect crate.
> let df = spark.range(100)?.repartition_by_range(4,
> vec![col("id").expression().clone()]);
> {code}
> The min, max and count of id per partition, against an OSS Spark 4.3.0
> Connect server on loopback:
> * repartitionByRange(4, "id") of pyspark-client 4.3.0, and of the Python
> client at spark-connect-rust master 8768cc4: (0, 24, 25), (25, 49, 25), (50,
> 74, 25), (75, 99, 25).
> * repartition(4, "id"), the request the Rust API sends: (2, 93, 28), (0, 99,
> 24), (14, 94, 24), (3, 98, 24).
> The rows are the same, but not which rows share a partition, so the files
> that a write produces differ, and a sortWithinPartitions afterwards does not
> sort globally.
> From source, at 8768cc4: LogicalPlan::RepartitionByRange pushes each
> expression unchanged into partition_exprs of RepartitionByExpression
> (crates/spark-connect/src/plan.rs:1612-1628).
--
This message was sent by Atlassian Jira
(v10.3.26#10030026)
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
