xndai commented on a change in pull request #1403: [CALCITE-3283] RelSubSet's 
best is not existed in the set
URL: https://github.com/apache/calcite/pull/1403#discussion_r316952608
 
 

 ##########
 File path: 
core/src/main/java/org/apache/calcite/config/CalciteSystemProperty.java
 ##########
 @@ -176,6 +176,14 @@
   public static final CalciteSystemProperty<Boolean> TEST_SLOW =
       booleanProperty("calcite.test.slow", false);
 
+  /**
+   * Whether to do validation within VolcanoPlanner after each rule firing.
+   * Note that doing so would significantly slow down the planning. Should only
+   * enable for unit test.
+   */
+  public static final CalciteSystemProperty<Boolean> 
TEST_VALIDATE_VOLCANO_PLANNER =
+      booleanProperty("calcite.test.validate.volcano.planner", false);
 
 Review comment:
   Do you mean log trace level? I update this because I don't want to tight it 
with log level. I hope in the future we can turn this check on by default in 
unit test. It doesn't necessarily enable tracing at the same time.

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