QUERY PLAN
GroupAggregate (cost=929.59..930.71 rows=49 width=44)
Group Key: c.project_id
-> Sort (cost=929.59..929.72 rows=50 width=20)
Sort Key: c.project_id
-> Hash Right Join (cost=754.36..928.18 rows=50 width=20)
Hash Cond: (tbl_implement_records.case_id = c.id)
-> HashAggregate (cost=381.98..476.36 rows=6292 width=20)
Group Key: tbl_implement_records.case_id
-> Seq Scan on tbl_implement_records (cost=0.00..316.00 rows=6598 width=24)
Filter: (NOT is_draft)
-> Hash (cost=371.75..371.75 rows=50 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..371.75 rows=50 width=8)
Filter: ((case_type = 2) AND (project_id = ANY ('{3927,3807,3580,3666,3461,3949,3827,3751,3931,3902}'::integer[])))