[calcite] branch master updated: [CALCITE-4426] Short-circuit evaluating when comparing two "RelTraitSet"s (Jiatao Tao)

[amaliujia]

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The following commit(s) were added to refs/heads/master by this push:
     new d21d540  [CALCITE-4426] Short-circuit evaluating when comparing two 
"RelTraitSet"s (Jiatao Tao)
d21d540 is described below

commit d21d540fafce8225b12b032900a8087f8ac33a91
Author: Jiatao Tao <245915...@qq.com>
AuthorDate: Fri Dec 4 16:32:56 2020 +0800

    [CALCITE-4426] Short-circuit evaluating when comparing two "RelTraitSet"s 
(Jiatao Tao)
---
 core/src/main/java/org/apache/calcite/plan/RelTraitSet.java | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/core/src/main/java/org/apache/calcite/plan/RelTraitSet.java 
b/core/src/main/java/org/apache/calcite/plan/RelTraitSet.java
index e7a65dc..955d0e9 100644
--- a/core/src/main/java/org/apache/calcite/plan/RelTraitSet.java
+++ b/core/src/main/java/org/apache/calcite/plan/RelTraitSet.java
@@ -483,6 +483,9 @@ public final class RelTraitSet extends 
AbstractList<RelTrait> {
    * @see org.apache.calcite.plan.RelTrait#satisfies(RelTrait)
    */
   public boolean satisfies(RelTraitSet that) {
+    if (this == that) {
+      return true;
+    }
     final int n =
         Math.min(
             this.size(),