| 摘要 |
According to some embodiments is disclosed a method for controlling and scheduling operation of at least one SQL operator on data chunk. The method comprising the step of: receiving SQL query, accessing data chunk blocks, receive meta data statistics and SQL query, analyzing the query selectivity, result size and Frequency moments calculation during the query execution run-time and choosing the right device to execute the each operator of the query according to analysis and predict results size. |
