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Aggregation and function support

The following pages highlight the functions and aggregations natively supported by different virtualized data sources, and those that our virtualization layer needs to emulate. If a function or aggregation has native support, we can include it in a virtualized query for execution by the virtualized source. If it is unsupported, our virtualization server will emulate it. This usually requires pulling more data from the server than when a function is implemented natively, potentially leading to slower query times.