Add supports for Hive's SELECT ... GROUP BY .. GROUPING SETS syntax
#1653
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This PR supports
SELECT ... GROUP BY .. GROUPING SETSsyntax for hive dialect. For more information, please refer to:https://cwiki.apache.org/confluence/display/Hive/Enhanced+Aggregation%2C+Cube%2C+Grouping+and+Rollup#EnhancedAggregation,Cube,GroupingandRollup-GROUPINGSETSclause
Also support hive
with rollup/cubeclause.This resolves issue #1644