Re: Parallel Aggregate

Yes the query is producing more groups according to the selectivity. 
For example - scan selectivity - 400000, the number of groups - 400 

Following is the query: 

SELECT tenpoCord, 
SUM(yokinZandaka) AS yokinZandakaxGOUKEI, 
SUM(kashikoshiZandaka) AS kashikoshiZandakaxGOUKEI, 
SUM(kouzasuu) AS kouzasuuxGOUKEI, 
SUM(sougouKouzasuu) AS sougouKouzasuuxGOUKEI 
FROM public.test01 
WHERE tenpoCord <= '001' AND 
kamokuCord = '01' AND 
kouzaKatujyoutaiCord = '0' 
GROUP BY kinkoCord,tenpoCord;