fc55423032
Support Grouping Sets, Rollup and Cube to extend group by statement support GROUPING SETS syntax ``` SELECT a, b, SUM( c ) FROM tab1 GROUP BY GROUPING SETS ( (a, b), (a), (b), ( ) ); ``` cube or rollup like ``` SELECT a, b,c, SUM( d ) FROM tab1 GROUP BY ROLLUP|CUBE(a,b,c) ``` [ADD] support grouping functions in expr like grouping(a) + grouping(b) (#2039) [FIX] fix analyzer error in window function(#2039)