Star join plan utilizes push-down hash join technology.
星型连接计划利用下推散列连接技术。
Step 2.4: Look for other push-down opportunities.
步骤2.4:寻找其他下推机会。
Understanding the capabilities of the data source enables the federation server to push down more functionality to that data source, which generally improves performance.
理解数据源的能力之后,联邦服务器就可以将更多的功能下推到那个数据源,这通常可以提高性能。
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