viirya commented on code in PR #13469:
URL: https://github.com/apache/datafusion/pull/13469#discussion_r1847130362
##########
datafusion/physical-plan/src/joins/sort_merge_join.rs:
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@@ -68,8 +68,46 @@ use crate::{
RecordBatchStream, SendableRecordBatchStream, Statistics,
};
-/// join execution plan executes partitions in parallel and combines them into
a set of
-/// partitions.
+/// Join execution plan that executes equi-join predicates on multiple
partitions using Sort-Merge
+/// join algorithm and applies an optional filter post join. Can be used to
join arbitrarily large
+/// inputs where one or both of the inputs don't fit in the available memory.
Review Comment:
> where one or both of the inputs don't fit in the available memory.
Hmm, is this true?
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