Target query to a subset of slices.
将查询定向给片的子集。
When you've looked at the access path selected by DB2 for your target query, ask yourself this question: Should DB2 have selected a different access path for the query?
在查看 DB2 为目标查询选择的访问路径时,问自己一个问题:DB2 应该为这个查询选择不同的访问路径吗?
To get the source nodes similar to the target query node, firstly the paths whose lengths were within an interval were extracted from the data source, then a similarity join process between them and.
为返回数据源中与查询目标节点相似的节点,首先提取出数据源中长度在固定范围内的所有路径,然后利用关系数据库系统将其与查询路径进行相似性连接,并按相似度从大到小返回所有结果。
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