The order of the source data does not need to be maintained (BDD splits it into roughly equal buffers).
我们不需要维护源数据的顺序(BDD会把它们切分为大致相等的缓存)。
If possible, operations are pushed down to execute remotely at the data source in order to take advantage of optimizations that may exist there (such as indexes).
如果可能的话,一些操作会被下推到数据源远程地执行,以利用那里的一些优化功能(例如索引)。
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