alamb commented on code in PR #8154:
URL: https://github.com/apache/arrow-datafusion/pull/8154#discussion_r1391743332


##########
datafusion/physical-plan/src/joins/hash_join_utils.rs:
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@@ -61,44 +61,45 @@ use hashbrown::HashSet;
 ///
 /// ``` text
 /// See the example below:
-/// Insert (1,1)
+///
+/// Insert (10,1)            <-- insert hash value 10 with row index 1

Review Comment:
   I found the overloaded use of `1` as both a hash value and an index VERY 
confusing. Therefore I propose to use different values for the hash value and 
the index values



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