Accelerating Queries with Group-By and Join by Groupjoin
نویسندگان
چکیده
Most aggregation queries contain both group-by and join operators, and spend a significant amount of time evaluating these two expensive operators. Merging them into one operator (the groupjoin) significantly speeds up query execution. We introduce two main equivalences to allow for the merging and prove their correctness. Furthermore, we show experimentally that these equivalences can significantly speed up TPC-H.
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ورودعنوان ژورنال:
- PVLDB
دوره 4 شماره
صفحات -
تاریخ انتشار 2011