[GitHub] [calcite] wojustme commented on a change in pull request #2013: [CALCITE-3935] Enhance Join-Materialization, support to pull-up filters under join of left or right (xurenhe)

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wojustme commented on a change in pull request #2013:
URL: https://github.com/apache/calcite/pull/2013#discussion_r709892309



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File path: core/src/main/java/org/apache/calcite/plan/SubstitutionVisitor.java
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@@ -2083,6 +2075,35 @@ public static boolean equalType(String desc0, MutableRel rel0, String desc1,
     return RelOptUtil.equal(desc0, rel0.rowType, desc1, rel1.rowType, litmus);
   }
 
+  /**
+   * Check if filter under join can be pulled 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 canPullUpFilterUnderJoin(JoinRelType joinType,
+                                                  @Nullable RexNode leftFilterRexNode,
+                                                  @Nullable RexNode rightFilterRexNode) {

Review comment:
       @yanlin-Lynn 
   Thanks for reminding.
   Please review again.




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