Running this sql causing high CPU usage and UI freeze

It is found in 21.1.5, while 21.1.3 is ok.

I run this sql in a mysql server:

select t.id,0 rn,case when t.is_spec=1 then '+' when t.has_child = 1 then '→' else '' end rn2,t.enabled,t.code,t.name,t.spec,pu.barcode,t.model,a.name brand,_1.qty,pun.name unit,_1.amtd/nullif(_1.qty,0) costd,_1.amtd,_1.qty_tui,_1.qty_tui*100/nullif(_1.qty+ifnull(_1.qty_tui,0),0) tr,_1.out_amt/nullif(_1.qty,0) out_cost,_1.out_amt,_1.amtd-ifnull(_1.profit,0)-ifnull(_1.out_amt,0) other_amt,ifnull(_1.profit,0)+ifnull(_1.out_amt,0) yhh_amt,round(100*_1.profit/nullif(_1.amtd,0),2) p_rate,_1.profit,0. `qty%`,0. `amt%`,0. `profit%`,t.comment
from product t force index (product_site_id_IDX,product_un,product_u_code)
left join product_unit pu on pu.product_id=t.id and pu.is_base=1
left join lookup a on a.id=t.brand_id
left join (select sum(t.qty*(case when b.bill_type in ('RUKU2','RUKUG2','CHUKU2','ZENG_SONG') then -1 else 1 end)) qty,sum(t.amount_disc*(case when b.bill_type in ('RUKU2','RUKUG2','CHUKU2','ZENG_SONG') then -1 else 1 end)) amtd,sum(case when b.bill_type='CHUKU2' then t.qty end) qty_tui,sum((if(b.bill_type = 'LEND3' or b.bill_type = 'CHUKU' and b.in_warehouse_id is null and b.out_warehouse_id is null, t.ship_amount, -sh.amount))) out_amt,sum(((case when b.bill_type in ('RUKU2','RUKUG2','CHUKU2','ZENG_SONG') then -1 else 1 end) * (t.amount_disc - ifnull(t.ship_amount, 0) - (ifnull(t.ret_amount, 0))) + ifnull(sh.amount,0) - ((case when b.bill_type in ('RUKU2','RUKUG2','CHUKU2','ZENG_SONG') then -1 else 1 end) * ifnull(if(b.bill_type in ('CHUKU','CHUKU2'),t.change_amt,if(t.main_pb = 1,b.change_amount,0)),0)))) profit,left(p.paths, 4) root
from product_bill t ignore index (product_bill_product_fk)
left join product p on p.id=t.product_id
join bill_index b use index (index_5,bill_index_site_id_idx) on b.id=t.bill_index_id
left join stock_hist sh on sh.product_bill_id=t.id
where b.site_id in (4362) and b.hide_lc = 0 and b.state in (3,4,5) and b.bill_type in ('CHUKU','CHUKU3','CHUKU2','CHUKU_CHG','WEI_TUOJ') and (b.bill_date >= '2021-08-26 00:00:00' and b.bill_date < '2021-08-29 00:00:00')
group by left(p.paths, 4)) _1 on _1.root=t.paths
left join lookup pun on pun.id=pu.unit_id
where _1.qty is not null and t.site_id = 4362 and t.paths like '____' and t.enabled = 1
order by t.id  ASC limit 0,101

[tohghua]

This library attempts to be “universal” by handling every possible SQL syntax structure of several dialects in a cost of performance impact. I’m not trying to say that the latter is expected, of course such things are inappropriate and should be fixed.

Actually, we’ve updated this library to newer version, can you try running your query against the EA version?

https://dbeaver.io/files/ea/

Thank you! EA version is ok now.

[GiannisDimitriou]

To be honest I find it strange that the project relied to a 3rd party library that is not stable. Essentially whoever wants to use DBeaver for anything else than simple ‘select’ queries must stay at a version <=21.1.3