dongjoon-hyun opened a new pull request, #560:
URL: https://github.com/apache/spark-connect-swift/pull/560
### What changes were proposed in this pull request?
This PR aims to support top-level `Decimal` decoding in
`DataFrame.collect(as:)`.
### Why are the changes needed?
Foundation's `Decimal.init(from:)` requests a keyed container of its
internal fields. So, the following throws `ArrowError.invalid("Column for key
\"exponent\" not found")`, while Scala `as[BigDecimal]` returns `1.50`.
```swift
try await spark.sql("SELECT CAST(1.5 AS DECIMAL(10,2)) AS v").collect(as:
Decimal.self)
```
### Does this PR introduce _any_ user-facing change?
Yes. `collect(as: Decimal.self)` and `collect(as: Decimal?.self)` now return
values instead of throwing errors.
### How was this patch tested?
Pass the CIs with the updated `CreateDataFrameTests.collectAsDecimal`.
### Was this patch authored or co-authored using generative AI tooling?
Generated-by: Claude Opus 5
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