viirya commented on code in PR #1120:
URL: https://github.com/apache/datafusion-comet/pull/1120#discussion_r1857303548
##########
spark/src/main/scala/org/apache/comet/CometSparkSessionExtensions.scala:
##########
@@ -1029,12 +1029,20 @@ class CometSparkSessionExtensions
var firstNativeOp = true
newPlan.transformDown {
case op: CometNativeExec =>
- if (firstNativeOp) {
+ val newPlan = if (firstNativeOp) {
firstNativeOp = false
op.convertBlock()
} else {
op
}
+
+ // If reaching leaf node, reset `firstNativeOp` to true
+ // because it will start a new block in next iteration.
+ if (op.children.isEmpty) {
+ firstNativeOp = true
+ }
+
+ newPlan
Review Comment:
Here this is the main diff that we don't have in `main` branch. Because
native scan now is a real "native" operator, once we encounter it when
transforming down, we need to reset `firstNativeOp` flag.
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