yanlin-Lynn commented on a change in pull request #2013:
URL: https://github.com/apache/calcite/pull/2013#discussion_r446513643



##########
File path: core/src/main/java/org/apache/calcite/plan/SubstitutionVisitor.java
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@@ -2011,6 +2006,38 @@ public static boolean equalType(String desc0, MutableRel 
rel0, String desc1,
     return RelOptUtil.equal(desc0, rel0.rowType, desc1, rel1.rowType, litmus);
   }
 
+  /**
+   * Check filter bottom join can be pull-up,
+   * when meeting JoinOnCalc of query unify to Join of target.
+   * Such as {@link JoinOnLeftCalcToJoinUnifyRule} <br/>
+   * {@link JoinOnRightCalcToJoinUnifyRule} <br/>
+   * {@link JoinOnCalcsToJoinUnifyRule} <br/>
+   */
+  private static boolean canPullUpFilterBottomJoin(JoinRelType joinType,
+                                                   RexNode leftFilterRexNode,
+                                                   RexNode rightFilterRexNode) 
{

Review comment:
       we do not format like this




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