dongjoon-hyun opened a new pull request, #533:
URL: https://github.com/apache/spark-connect-swift/pull/533
### What changes were proposed in this pull request?
This PR aims to support the `broadcast` function.
```swift
public func broadcast(_ df: DataFrame) async -> DataFrame
```
Unlike most functions in `Functions.swift`, `broadcast` takes a `DataFrame`
and returns a
`DataFrame` marked with a `broadcast` join hint, mirroring PySpark's
`broadcast(df) -> df.hint("broadcast")` and Scala's
`def broadcast[U](df: Dataset[U]): df.type`.
### Why are the changes needed?
For feature parity with Apache Spark. `broadcast` has been available since
Apache Spark 1.6.0
in PySpark and is a commonly used hint for broadcast hash joins.
### Does this PR introduce _any_ user-facing change?
Yes, this PR adds a new public function, `broadcast`.
```swift
let joined = await left.join(broadcast(right), "id")
```
### How was this patch tested?
Pass the CIs with the newly added test cases in `FunctionsTests`.
### Was this patch authored or co-authored using generative AI tooling?
Generated-by: Claude Opus 5
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