Github user ueshin commented on a diff in the pull request: https://github.com/apache/spark/pull/18787#discussion_r135952996 --- Diff: sql/core/src/test/scala/org/apache/spark/sql/execution/arrow/ArrowConvertersSuite.scala --- @@ -1629,6 +1632,39 @@ class ArrowConvertersSuite extends SharedSQLContext with BeforeAndAfterAll { } } + test("roundtrip payloads") { + val allocator = ArrowUtils.rootAllocator.newChildAllocator("int", 0, Long.MaxValue) + val vector = ArrowUtils.toArrowField("int", IntegerType, nullable = true) + .createVector(allocator).asInstanceOf[NullableIntVector] + vector.allocateNew() + val mutator = vector.getMutator() + + (0 until 10).foreach { i => + mutator.setSafe(i, i) + } + mutator.setNull(10) + mutator.setValueCount(11) + + val schema = StructType(Seq(StructField("int", IntegerType))) + + val batch = new ColumnarBatch(schema, Array[ColumnVector](new ArrowColumnVector(vector)), 11) --- End diff -- Yes, I meant your second comment. We do test the columnar batch with `ArrowColumnVector` in `ColumnarBatchSuite` and also we use it in `ArrowConverters.fromPayloadIterator()`, so I thought we don't need to use it here.
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