利用下推连接技术的星型连接计划使得散列连接更加有效的主要原因是，在初期减少了事实表(探测表)的行数。
A star join plan utilizing push-down hash join technology makes hash joins more effective primarily due to reduction of fact table (probe table) rows early on.
星型连接计划利用下推散列连接技术。
您必须自己编写解析器的可能性，因为您可能需要多种不同数据结构(例如，布尔型、标量、数组和散列)。
The probability that you may have to write your own parser, because you are likely to need a variety of different data structures (booleans, scalars, arrays, and hashes, for example).
编写自己的解析器，因为您需要不同的数据结构(布尔型、标量、数组)和散列：AppConfig处理所有这些数据结构，但它这样做时不用嵌套。
Writing your own parser because you need different data structures (booleans, scalars, arrays) and hashes: AppConfig handles all these data structures, but it does so without nesting.
编写自己的解析器，因为您需要不同的数据结构(布尔型、标量、数组)和散列：AppConfig处理所有这些数据结构，但它这样做时不用嵌套。
Writing your own parser because you need different data structures (booleans, scalars, arrays) and hashes: AppConfig handles all these data structures, but it does so without nesting.
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