Dandandan commented on code in PR #20142:
URL: https://github.com/apache/datafusion/pull/20142#discussion_r2767493460


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datafusion/core/tests/physical_optimizer/filter_pushdown.rs:
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@@ -1213,7 +1213,7 @@ async fn 
test_hashjoin_dynamic_filter_pushdown_partitioned() {
           -       RepartitionExec: partitioning=Hash([a@0, b@1], 12), 
input_partitions=1
           -         DataSourceExec: file_groups={1 group: [[test.parquet]]}, 
projection=[a, b, c], file_type=test, pushdown_supported=true
           -       RepartitionExec: partitioning=Hash([a@0, b@1], 12), 
input_partitions=1
-          -         DataSourceExec: file_groups={1 group: [[test.parquet]]}, 
projection=[a, b, e], file_type=test, pushdown_supported=true, 
predicate=DynamicFilter [ empty ]
+          -         DataSourceExec: file_groups={1 group: [[test.parquet]]}, 
projection=[a, b, e], file_type=test, pushdown_supported=true, predicate=CASE 
hash_repartition % 12 WHEN 0 THEN DynamicFilter [ empty ] WHEN 1 THEN 
DynamicFilter [ empty ] WHEN 2 THEN DynamicFilter [ empty ] WHEN 3 THEN 
DynamicFilter [ empty ] WHEN 4 THEN DynamicFilter [ empty ] WHEN 5 THEN 
DynamicFilter [ empty ] WHEN 6 THEN DynamicFilter [ empty ] WHEN 7 THEN 
DynamicFilter [ empty ] WHEN 8 THEN DynamicFilter [ empty ] WHEN 9 THEN 
DynamicFilter [ empty ] WHEN 10 THEN DynamicFilter [ empty ] WHEN 11 THEN 
DynamicFilter [ empty ] ELSE false END

Review Comment:
   OTOH I guess this expression can simplify those inner expression itself.



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