viirya commented on code in PR #905:
URL: https://github.com/apache/datafusion-comet/pull/905#discussion_r1746087156
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common/src/main/scala/org/apache/comet/vector/NativeUtil.scala:
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@@ -56,6 +60,35 @@ class NativeUtil {
*/
private val dictionaryProvider: CDataDictionaryProvider = new
CDataDictionaryProvider
+ /**
+ * Allocates Arrow structs for the given number of columns.
+ *
+ * @param numCols
+ * the number of columns
+ * @return
+ * a pair of Arrow arrays and Arrow schemas
+ */
+ def allocateArrowStructs(numCols: Int): (Array[ArrowArray],
Array[ArrowSchema]) = {
+ val arrays = new Array[ArrowArray](numCols)
+ val schemas = new Array[ArrowSchema](numCols)
+
+ (0 until numCols).foreach { index =>
+ val arrowSchema = ArrowSchema.allocateNew(allocator)
+
+ // Manually fill NULL to `release` slot of ArrowSchema because
ArrowSchema doesn't provide
+ // `markReleased`.
+ val buffer =
+ MemoryUtil.directBuffer(arrowSchema.memoryAddress(),
72).order(ByteOrder.nativeOrder)
+ buffer.putLong(56, NULL);
Review Comment:
Added a comment.
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