该语句返回与指定路径结构匹配的所有节点。
This statement returns all nodes that match the specified path structure.
sql语句本身也会影响访问路径选择。
The SQL statement itself also impacts the access path selection.
回答这些问题就会确定查询的访问路径；调优的目标是找到更好的路径，减少语句的执行时间。
Answering these questions generates the query's access path; your tuning aim is to get a better path that will reduce statement execution time.
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