xudong963 commented on a change in pull request #1135:
URL: https://github.com/apache/arrow-datafusion/pull/1135#discussion_r744109782
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File path: datafusion/src/physical_plan/hash_join.rs
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@@ -120,6 +120,8 @@ pub struct HashJoinExec {
metrics: ExecutionPlanMetricsSet,
/// Information of index and left / right placement of columns
column_indices: Vec<ColumnIndex>,
+ /// If null_equal_null is true, null == null else null != null
Review comment:
I agree, we should keep preciseness! 👍🏻
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