Gathering this information entirely at query time can be computationally expensive, so a common way to make it scalable and efficient, is to create a separate entity-centric index as discussed in this thread: Pipelined Histogram Aggregation?
Gathering this information entirely at query time can be computationally expensive, so a common way to make it scalable and efficient, is to create a separate entity-centric index as discussed in this thread: Pipelined Histogram Aggregation?
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