QUERY PLAN
GroupAggregate (cost=1037.94..1038.80 rows=38 width=44)
Group Key: c.project_id
-> Sort (cost=1037.94..1038.03 rows=39 width=20)
Sort Key: c.project_id
-> Hash Right Join (cost=858.13..1036.90 rows=39 width=20)
Hash Cond: (tbl_implement_records.case_id = c.id)
-> HashAggregate (cost=394.56..491.62 rows=6471 width=20)
Group Key: tbl_implement_records.case_id
-> Seq Scan on tbl_implement_records (cost=0.00..326.79 rows=6777 width=24)
Filter: (NOT is_draft)
-> Hash (cost=463.08..463.08 rows=39 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..463.08 rows=39 width=8)
Filter: ((case_type = 2) AND (project_id = ANY ('{4048,3927,3949,3899,3890,3886,3872,3857,3855,3816,3786,3767,3764,3760,3752,3744,3723,3644}'::integer[])))