Description
there is code that like "parallelLevel2 = CostUtil.estimateParallelLevel()" in HashJoinPlan.java, but parallelLevel2 does not use. so we can remove parallelLevel2.
there is code that like "parallelLevel2 = CostUtil.estimateParallelLevel()" in HashJoinPlan.java, but parallelLevel2 does not use. so we can remove parallelLevel2.