What type of PR is this?

/kind task

What does this PR do / why do we need it:

Improves performance for Aggregation queries

Which issue(s) this PR fixes:

Fixes
#I6OURQ:Performance Analysis for TPCDS queries
#I6RY8H:Memory usage improvement for Aggregations

Special notes for your reviewers:

1T Time(Sec) vs 1.9.0 Base
1.9.0 Base 1061.9 0.00%
PR 1760+1761+1763 909.43 16.77%