BEGIN; BEGIN EXPLAIN select o_orderpriority, count(*) as order_count from orders where o_orderdate >= date '1993-04-01' and o_orderdate < cast(date '1993-04-01' + interval '3 month' as date) and exists ( select * from lineitem where l_orderkey = o_orderkey and l_commitdate < l_receiptdate ) group by o_orderpriority order by o_orderpriority; QUERY PLAN ------------------------------------------------------------------------------------------------------------------------------- Sort (cost=1481958.22..1481958.23 rows=1 width=16) Sort Key: orders.o_orderpriority -> HashAggregate (cost=1481958.20..1481958.21 rows=1 width=16) Group Key: orders.o_orderpriority -> Nested Loop Semi Join (cost=5935.21..1481182.46 rows=155149 width=16) -> Bitmap Heap Scan on orders (cost=5934.65..268082.97 rows=575088 width=20) Recheck Cond: ((o_orderdate >= '1993-04-01'::date) AND (o_orderdate < '1993-07-01'::date)) -> Bitmap Index Scan on orders_o_orderkey_o_orderdate_brin_idx (cost=0.00..5790.88 rows=575088 width=0) Index Cond: ((o_orderdate >= '1993-04-01'::date) AND (o_orderdate < '1993-07-01'::date)) -> Index Scan using pk_lineitem on lineitem (cost=0.56..7.07 rows=5 width=4) Index Cond: (l_orderkey = orders.o_orderkey) Filter: (l_commitdate < l_receiptdate) Planning time: 1.642 ms (13 rows) COMMIT; COMMIT