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[SPARK-51850] Fix DataFrame.execute to reset previously received Arrow batch data #72

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[SPARK-51850] Fix DataFrame.execute to reset previously received Arrow batch data #72

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3 changes: 3 additions & 0 deletions Sources/SparkConnect/DataFrame.swift
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Original file line number Diff line number Diff line change
Expand Up @@ -151,6 +151,9 @@ public actor DataFrame: Sendable {

/// Execute the plan and try to fill `schema` and `batches`.
private func execute() async throws {
// Clear all existing batches.
self.batches.removeAll()

try await withGRPCClient(
transport: .http2NIOPosix(
target: .dns(host: spark.client.host, port: spark.client.port),
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9 changes: 9 additions & 0 deletions Tests/SparkConnectTests/DataFrameTests.swift
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Expand Up @@ -311,6 +311,15 @@ struct DataFrameTests {
await spark.stop()
}

@Test
func collectMultiple() async throws {
let spark = try await SparkSession.builder.getOrCreate()
let df = try await spark.range(1)
#expect(try await df.collect().count == 1)
#expect(try await df.collect().count == 1)
await spark.stop()
}

@Test
func head() async throws {
let spark = try await SparkSession.builder.getOrCreate()
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