viirya commented on code in PR #6874:
URL: https://github.com/apache/arrow-datafusion/pull/6874#discussion_r1256464610
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datafusion/core/src/physical_plan/sorts/merge.rs:
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@@ -51,7 +54,9 @@ macro_rules! merge_helper {
}};
}
-/// Perform a streaming merge of [`SendableRecordBatchStream`]
+/// Perform a streaming merge of [`SendableRecordBatchStream`] based on
provided sort expressions
+/// while preserving order. This is a convenience wrapper for
[`SortPreservingMergeStream`] and
+/// chooses a right cursor for the expressions and the data type
Review Comment:
Not sure about the cursor. You mean `RowCursorStream`?
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