a59debbb - Drill-1091: Make filter propagate best rel's collation trait. Fix StreamingAggPrule and HashAggPrule's pattern matching to look for child RelNodes.
Drill-1091: Make filter propagate best rel's collation trait. Fix StreamingAggPrule and HashAggPrule's pattern matching to look for child RelNodes.
Added variation of TPCH 19 and enabled the modified version in test suite.
