拥有某种能够自检的查询语言和索引结构将是非常理想的。
It would be nice to have a query language that could introspect and indexing structures.
清单4中的查询规定了您希望拥有的几个关系。
The query in Listing 4 states several relations you'd want to hold.
主程序拥有返回匹配所需的查询、排序和显示逻辑。
The main program holds the query, sorting, and display logic for returning the matches.
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