xndai opened a new pull request #1910: [CALCITE-3915] Add rule listener to report rule attempts and time at … URL: https://github.com/apache/calcite/pull/1910 …DEBUG log level 1. Fix current VolcanoPlanner's rule listener to use MulticastRelOptListener so multiple listeners can be added at the same time. 2. Create a RuleAttemptsListener that records attempts of each rule and the time of rule firing. The listener is only added when logger is at DEBUG level, or lower. 3. Move some verbose log from debug to trace level.
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