QUERY PLAN
GroupAggregate (cost=388.38..431.58 rows=1 width=44)
Group Key: c.project_id
-> Hash Right Join (cost=388.38..431.56 rows=1 width=20)
Hash Cond: (tbl_pre_sales.case_id = c.id)
-> HashAggregate (cost=101.48..124.92 rows=1563 width=20)
Group Key: tbl_pre_sales.case_id
-> Seq Scan on tbl_pre_sales (cost=0.00..85.75 rows=1573 width=24)
Filter: (NOT is_draft)
-> Hash (cost=286.89..286.89 rows=1 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..286.89 rows=1 width=8)
Filter: ((case_type = 1) AND (project_id = 3927))