private Operator getReuseLimitOperator(Operator child) {
            this.reuseLimitOperator =
                reuseLimitOperator == null
                    ? new LimitOperator(operatorContext, node.getPushDownLimit(), child)
                    : new LimitOperator(reuseLimitOperator, child);
            return this.reuseLimitOperator;
          }
This Visitor is responsible for transferring Table PlanNode Tree to Table Operator Tree.
iotdb-core/datanode/src/main/java/org/apache/iotdb/db/queryengine/plan/planner/TableOperatorGenerator.java