如何加快查詢速度？

Question

select 
dt.total_paket,dt.total_paket_selesai,dt.total_pagu,dt.pagu_selesai,dt.penawaran,dt.selisih,dt.selisih_persen, 
thn.tahun as tahun_lelang 
from (select TO_CHAR((current_date - interval '1 year' * a),'YYYY') AS tahun FROM generate_series(0,4,1) AS s(a)) thn 
LEFT JOIN 
(select 
    count(semualelang)      as total_paket, 
    count(selesailelang)      as total_paket_selesai, 
    sum(semualelang.pkt_pagu)     as total_pagu, 
    sum(selesailelang.pagu_selesai)     as pagu_selesai, 
    sum(selesailelang.penawaran)     as penawaran, 
    sum(selesailelang.pagu_selesai) - sum(selesailelang.penawaran) as selisih, 
    round((sum(selesailelang.pagu_selesai) - sum(selesailelang.penawaran))/sum(selesailelang.pagu_selesai) * 100::numeric) AS selisih_persen, 
    date_part('YEAR', semualelang.lls_tgl_setuju)     as tahun_lelang 
from(
select agen.agc_nama,sk.stk_id,sk.stk_nama,ls.lls_id,ls.pkt_id,sd.sbd_id,sd.sbd_ket,a.ang_tahun,p.pkt_nama,p.pkt_pagu,p.pkt_hps,p.kgr_id,ls.mtd_pemilihan,ls.lls_tgl_setuju from lelang_seleksi ls 
     left join paket p on ls.pkt_id=p.pkt_id 
     left join (select pa.pkt_id,pa.ang_id from paket_anggaran pa inner join (select pkt_id,max(auditupdate) as auditupdate from paket_anggaran group by pkt_id) pa1 on pa1.pkt_id=pa.pkt_id and pa1.auditupdate=pa.auditupdate) pa on pa.pkt_id=p.pkt_id 
     left join satuan_kerja sk on p.stk_id=sk.stk_id 
     left join agency agen on agen.agc_id=sk.agc_id 
     left join anggaran a on pa.ang_id=a.ang_id 
     left join sumber_dana sd on a.sbd_id=sd.sbd_id 
     where ls.lls_status=1) semualelang 
              left join (
              select e.lls_id,n.psr_id,pemenang.pagu_selesai,pemenang.nev_harga,min(n.nev_harga) as penawaran,pemenang.eva_jenis from evaluasi e inner join nilai_evaluasi n on e.eva_id=n.eva_id 
               inner join (select n.psr_id,e.eva_id,ls.lls_id, p.pkt_pagu as pagu_selesai, n.nev_harga,e.eva_jenis from lelang_seleksi ls 
                     inner join paket p on ls.pkt_id=p.pkt_id and ls.lls_status=1 
                     inner join (select max(e.eva_versi) as mev, e.lls_id from evaluasi e inner join lelang_seleksi ls on e.lls_id=ls.lls_id where ls.lls_status=1 group by e.lls_id) me on ls.lls_id=me.lls_id 
                     inner join evaluasi e on me.lls_id=e.lls_id AND e.eva_jenis = 4::numeric and e.eva_versi=me.mev 
                     /*inner join workflow w on e.eva_wf_id = w.wf_id AND w.wf_state = 5::numeric */ 
                     inner join nilai_evaluasi n on e.eva_id = n.eva_id AND n.nev_lulus = 1::numeric 
                     left join (select ls.lls_id,  
                CASE 
                 WHEN (select count(*) from jadwal j where now() BETWEEN j.dtj_tglawal and j.dtj_tglakhir and j.lls_id=ls.lls_id) > 0 THEN '0'::numeric 
                 ELSE '1'::numeric 
                END 
                 AS s_selesai 
               from lelang_seleksi ls order by ls.lls_id desc) tahapan on tahapan.lls_id=ls.lls_id 
                     where ls.lls_status=1 and tahapan.s_selesai=1) pemenang on e.lls_id=pemenang.lls_id and n.psr_id=pemenang.psr_id 
              where e.lls_id=pemenang.lls_id and n.psr_id=pemenang.psr_id 
              group by e.lls_id,n.psr_id,pemenang.pagu_selesai,pemenang.nev_harga,pemenang.eva_jenis 
              )selesailelang on semualelang.lls_id=selesailelang.lls_id 
group by date_part('YEAR', semualelang.lls_tgl_setuju)) dt 
on cast(thn.tahun as double precision)=dt.tahun_lelang 
ORDER BY thn.tahun ASC 

Answer 1

可以加快查詢速度像這樣與view，

1. 概括所有的查詢來獲取一些模式
2. 創建數據庫視圖
3. 重新編寫所有的查詢

4. 即 - a）使用此視圖 - >

   SELECT agen.agc_nama，sk.stk_id，sk.stk_nama，ls.lls_id，ls.pkt_ id，sd.sbd_id，sd.sbd_ket，a.ang_tahun，p.pkt_nama，p.pkt_pagu，p.pkt_hps，p.kgr_id，ls.mtd_pemilihan，ls.lls_tgl_setuju FROM lelang_seleksi ls LEFT JOIN paket p ON ls.pkt_id = p.pkt_id LEFT JOIN（SELECT pa.pkt_id，pa.ang_id FROM paket_anggaran pa INNER JOIN（SELECT pkt_id，MAX（auditupdate）AS auditupdate FROM paket_anggaran GROUP BY pkt_id）pa1 ON pa1.pkt_id = pa.pkt_id AND pa1.auditupdate = pa.auditupdate）pa ON pa.pkt_id = p.pkt_id LEFT JOIN satuan_kerja sk ON p.stk_id = sk.stk_id LEFT JOIN agency agen ON agen.agc_id = sk.agc_id LEFT JOIN anggaran a ON pa.ang_id = a .ang_id LEFT JOIN sumber_dana sd ON a.sbd_id = sd.sbd_id WHERE ls.lls_status = 1

b）中然後使用此的視圖 -

SELECT e.lls_id,n.psr_id,pemenang.pagu_selesai,pemenang.nev_harga,MIN(n.nev_harga) AS penawaran,pemenang.eva_jenis FROM evaluasi e INNER JOIN nilai_evaluasi n ON e.eva_id=n.eva_id 
               INNER JOIN (SELECT n.psr_id,e.eva_id,ls.lls_id, p.pkt_pagu AS pagu_selesai, n.nev_harga,e.eva_jenis FROM lelang_seleksi ls 
                     INNER JOIN paket p ON ls.pkt_id=p.pkt_id AND ls.lls_status=1 
                     INNER JOIN (SELECT MAX(e.eva_versi) AS mev, e.lls_id FROM evaluasi e INNER JOIN lelang_seleksi ls ON e.lls_id=ls.lls_id WHERE ls.lls_status=1 GROUP BY e.lls_id) me ON ls.lls_id=me.lls_id 
                     INNER JOIN evaluasi e ON me.lls_id=e.lls_id AND e.eva_jenis = 4::NUMERIC AND e.eva_versi=me.mev 
                     /*inner join workflow w on e.eva_wf_id = w.wf_id AND w.wf_state = 5::numeric */ 
                     INNER JOIN nilai_evaluasi n ON e.eva_id = n.eva_id AND n.nev_lulus = 1::NUMERIC 
                     LEFT JOIN (SELECT ls.lls_id,  
                CASE 
                 WHEN (SELECT COUNT(*) FROM jadwal j WHERE NOW() BETWEEN j.dtj_tglawal AND j.dtj_tglakhir AND j.lls_id=ls.lls_id) > 0 THEN '0'::NUMERIC 
                 ELSE '1'::NUMERIC 
                END 
                 AS s_selesai 
               FROM lelang_seleksi ls ORDER BY ls.lls_id DESC) tahapan ON tahapan.lls_id=ls.lls_id 
                     WHERE ls.lls_status=1 AND tahapan.s_selesai=1) pemenang ON e.lls_id=pemenang.lls_id AND n.psr_id=pemenang.psr_id 
              WHERE e.lls_id=pemenang.lls_id AND n.psr_id=pemenang.psr_id 
              GROUP BY e.lls_id,n.psr_id,pemenang.pagu_selesai,pemenang.nev_harga,pemenang.eva_jenis 

c）中然後使用此的視圖 -

SELECT 
    COUNT(semualelang)      AS total_paket, 
    COUNT(selesailelang)      AS total_paket_selesai, 
    SUM(semualelang.pkt_pagu)     AS total_pagu, 
    SUM(selesailelang.pagu_selesai)     AS pagu_selesai, 
    SUM(selesailelang.penawaran)     AS penawaran, 
    SUM(selesailelang.pagu_selesai) - SUM(selesailelang.penawaran) AS selisih, 
    ROUND((SUM(selesailelang.pagu_selesai) - SUM(selesailelang.penawaran))/SUM(selesailelang.pagu_selesai) * 100::NUMERIC) AS selisih_persen, 
    date_part('YEAR', semualelang.lls_tgl_setuju)     AS tahun_lelang 
FROM() semualelang 
    LEFT JOIN()selesailelang ON semualelang.lls_id=selesailelang.lls_id 
GROUP BY date_part('YEAR', semualelang.lls_tgl_setuju) 

實際上這shouuld看起來像這樣 - >

SELECT 
    COUNT(semualelang)      AS total_paket, 
    COUNT(selesailelang)      AS total_paket_selesai, 
    SUM(semualelang.pkt_pagu)     AS total_pagu, 
    SUM(selesailelang.pagu_selesai)     AS pagu_selesai, 
    SUM(selesailelang.penawaran)     AS penawaran, 
    SUM(selesailelang.pagu_selesai) - SUM(selesailelang.penawaran) AS selisih, 
    ROUND((SUM(selesailelang.pagu_selesai) - SUM(selesailelang.penawaran))/SUM(selesailelang.pagu_selesai) * 100::NUMERIC) AS selisih_persen, 
    date_part('YEAR', semualelang.lls_tgl_setuju)     AS tahun_lelang 
FROM semualelang_view 
    LEFT JOIN selesailelang_view ON semualelang_view.lls_id=selesailelang_view.lls_id 
GROUP BY date_part('YEAR', semualelang_view.lls_tgl_setuju) 

這不是一個正確的代碼 - 你必須找到你自己的方式，這只是PSEDUO流程如何實現你的目標。