QUERY PLAN
GroupAggregate (cost=720.27..905.95 rows=4 width=44)
Group Key: c.client_id
-> Hash Right Join (cost=720.27..905.87 rows=4 width=20)
Hash Cond: (tbl_implement_records.case_id = c.id)
-> HashAggregate (cost=410.51..511.28 rows=6718 width=20)
Group Key: tbl_implement_records.case_id
-> Seq Scan on tbl_implement_records (cost=0.00..340.28 rows=7023 width=24)
Filter: (NOT is_draft)
-> Hash (cost=309.71..309.71 rows=4 width=8)
-> Seq Scan on tbl_cases c (cost=0.00..309.71 rows=4 width=8)
Filter: ((case_type = 2) AND (client_id = 146))