klion26 commented on code in PR #7935:
URL: https://github.com/apache/arrow-rs/pull/7935#discussion_r2218042453
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parquet-variant/src/builder.rs:
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@@ -1000,6 +1048,8 @@ impl<'a> ListBuilder<'a> {
// Get parent's buffer
let parent_buffer = self.parent_state.buffer();
+ // as object builder has been reused the parent buffer,
+ // we need to shift the offset by the starting offset of the parent
object
Review Comment:
Good catch, because if we create a `ListBuilder` inside an `ObjectBuilder`,
then we need do this shift, but after the last change, the comment here need to
be moved to `ParentState::finish()`.
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