rich7420 commented on code in PR #6498:
URL: https://github.com/apache/datafusion-comet/pull/6498#discussion_r4162280677
##########
native/spark-expr/src/array_funcs/list_extract.rs:
##########
@@ -359,6 +360,113 @@ fn list_extract<O: OffsetSizeTrait>(
)))
}
+// Inspect owned output capacity directly: nested builders can propagate a
reservation
+// into deeper children even when the immediate child count was estimated
correctly.
+// Keep ordinary growth headroom and small aligned buffers to avoid
unnecessary copies.
+fn has_excess_nested_capacity(array: &dyn Array) -> bool {
Review Comment:
ok , thanks
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