Как оптимизировать postgresql, используя функции или процедуры - PullRequest
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Как оптимизировать postgresql, используя функции или процедуры

0 голосов
/ 23 февраля 2020

Как оптимизировать postgreql, когда отчет очень медленный. Я ищу способ уменьшить подзапросы. У меня есть несколько из этих подзапросов, выполняющих одинаковые вычисления, но с разными интервалами параметров. например, интервал «день 271», интервал «день 365». В настоящее время каждый вызов для каждого интервала выполняется в отдельном подзапросе. Я хотел бы реализовать это по-другому и избежать подзапросов, так как я понял, что они делают генерацию отчетов действительно медленной. 

SELECT

    merchandiseCode,
    merchandiseDescription,
    merchandiseCategory_ID,
    merchandiseCategory,
    Case OnHand WHEN 0 THEN 0 ELSE CurrentCost*OnHand END AS CurrentCost, 
    CASE WHEN qty5>0 OR qty4>0 OR qty3>0 OR qty2>0 THEN stock1 ELSE CASE WHEN 
     qty1 >0 THEN qty1 ELSE 0 END END as qty1,
    CASE WHEN qty5>0 OR qty4>0 OR qty3>0 THEN stock2 ELSE CASE WHEN qty2>0 
    THEN qty2 ELSE 0 END END as qty2,
    CASE WHEN qty5>0 OR qty4>0 THEN stock3 ELSE CASE WHEN qty3 >0 THEN qty3 
     ELSE 0 END END AS qty3,  
    CASE WHEN qty5>0 THEN Stock4 ELSE  CASE WHEN qty4> 0 THEN qty4 ELSE 0 END 
    END AS qty4,
    CASE WHEN qty5>0 THEN qty5 ELSE 0 END As qty5,
    stock1,
    stock2,
    stock3,
    stock4,
    OnHand,

    CASE WHEN qty5>0 OR qty4>0 OR qty3>0 OR qty2>0 THEN round(stock1* 
    (cost1),2) ELSE CASE WHEN qty1 >0 THEN round(qty1*(cost1),2) ELSE 0 END 
   END as value1,

    CASE WHEN qty5>0 OR qty4>0 OR qty3>0 THEN round(stock2*(cost2),2) ELSE 
   CASE WHEN qty2>0 THEN round(qty2*(cost2),2) ELSE 0 END END as value2,

    CASE WHEN qty5>0 OR qty4>0 THEN round(Stock3*(Cost3),2) ELSE CASE WHEN 
    qty3 >0 THEN round(qty3*(cost3),2) ELSE 0 END END as value3,

    CASE WHEN qty5>0 THEN round(Stock4*(Cost4),2) ELSE CASE WHEN qty4>0 THEN 
    round(qty4*(Cost4),2) ELSE 0 END END as value4,

    CASE WHEN qty5>0 THEN round(qty5*(cost4),2) ELSE 0 END as value5

    from (
    SELECT 

    prod.value as merchandiseCode,
    prod.description as merchandiseDescription,
    prod.merchandiseCategory_ID as merchandiseCategory_ID,
    prodcat.name AS merchandiseCategory,

    (SELECT COALESCE((cos.NewCostPrice),0) 
    FROM  M_CostM cos  WHERE cos.Created = (SELECT MAX(c.Created)
    FROM M_CostM c 
    LEFT JOIN M_CostElement ce on ce.M_CostElement_UU='bf6ee9b8-4600-480b- 
     b415-f94c698b0648'
    WHERE
    prod.M_Product_ID = c.M_Product_ID AND prod.ProductType !='A'
    AND c.created <= ('2020-02-17'::date)
    AND c.Customer_ID =1000008  AND c.C_AcctSchema_ID = 1000009
    AND c.M_CostElement_ID=ce.M_CostElement_ID
    AND c.rg_ID  = CASE WHEN c.AD_Org_ID =0 Then c.AD_Org_ID ELSE  1000002  
    END 
    )) as CurrentCost,

    (SELECT COALESCE(SUM(t.movementqty),0) FROM M_merchandise t WHERE 
    t.M_Product_ID=1013449 AND t.Customer_ID =1000008 
    AND t.movementdate > (('2020-02-17'::date)-interval 'day 90') 
    AND t.movementdate <('2020-02-17'::date)
    AND t.rg_ID  =1000044
    AND t.movementtype IN('I+','M+','P+','V+','W+')) AS stock1,  ----stock 
    exist from previous brackets

    (SELECT (SELECT SUM(t.movementqty) FROM M_merchandise t WHERE 
    t.M_Product_ID=1013449  
    AND t.Customer_ID =1000008 
    AND t.movementtype IN('I+','M+','P+','V+','W+') 
    AND t.movementdate<('2020-02-17'::date)
    AND t.rg_ID  =1000044 ) + 
    (SELECT SUM(t.movementqty) FROM M_merchandise t WHERE 
    t.M_Product_ID=1013449 
    AND t.Customer_ID =1000008  
    AND t.movementtype IN('I-','C-','M-','P-','V-','W-') 
    AND t.movementdate<('2020-02-17'::date) 
    AND t.rg_ID  = 1000044)) AS qty1,

    (SELECT COALESCE(SUM(t.movementqty),0) FROM M_merchandise t WHERE 
    t.M_Product_ID=1013449 AND t.Customer_ID =1000008 
    AND t.movementdate > (('2020-02-17'::date)-interval 'day 180') 
    AND t.movementdate <=  (('2020-02-17'::date)-interval 'day 91')
    AND t.rg_ID  =1000044
    AND t.movementtype IN('I+','M+','P+','V+','W+')) AS stock2,  ----stock 
    exist from previous brackets

    (SELECT (SELECT SUM(t.movementqty) FROM M_merchandise t WHERE 
    t.M_Product_ID=1013449  
    AND t.Customer_ID =1000008 
    AND t.movementtype IN('I+','M+','P+','V+','W+') 
    AND t.movementdate<(('2020-02-17'::date)- interval 'day 91') 
    AND t.rg_ID  =1000044 ) + 
    (SELECT SUM(t.movementqty) FROM M_merchandise t WHERE 
    t.M_Product_ID=1013449 
    AND t.Customer_ID =1000008  
    AND t.movementtype IN('I-','C-','M-','P-','V-','W-') 
    AND t.movementdate<('2020-02-17'::date) 
    AND t.rg_ID  = 1000044)) AS qty2,

    (SELECT COALESCE(SUM(t.movementqty),0) FROM M_merchandise t WHERE 
    t.M_Product_ID=1013449 AND t.Customer_ID =1000008 
    AND t.movementdate > (('2020-02-17'::date)-interval 'day 181') 
    AND t.movementdate <= (('2020-02-17'::date)-interval 'day 270')
    AND t.rg_ID  =1000002
    AND t.movementtype IN('I+','M+','P+','V+','W+')) AS stock3,  ----stock 
    exist from previous brackets

    (SELECT (SELECT SUM(t.movementqty) FROM M_merchandise t WHERE 
    t.M_Product_ID=1013449  
     AND t.Customer_ID =1000008 
    AND t.movementtype IN('I+','M+','P+','V+','W+') 
    AND t.movementdate<(('2020-02-17'::date)- interval 'day 181') 
    AND t.rg_ID  =1000044) + 
    (SELECT SUM(t.movementqty) FROM M_merchandise t WHERE 
     t.M_Product_ID=1013449 
    AND t.Customer_ID =1000008  
    AND t.movementtype IN('I-','C-','M-','P-','V-','W-') 
    AND t.movementdate<('2020-02-17'::date) 
    AND t.rg_ID  = 1000044)) AS qty3,

    (SELECT COALESCE(SUM(t.movementqty),0) FROM M_merchandise t WHERE 
    t.M_Product_ID=1013449 AND t.Customer_ID =1000008 
    AND t.movementdate > (('2020-02-17'::date)-interval 'day 271') AND 
     t.movementdate > (('2020-02-17'::date)-interval 'day 365')
     AND t.rg_ID  =1000044
    AND t.movementtype IN('I+','M+','P+','V+','W+')) AS stock4, 

    (SELECT (SELECT SUM(t.movementqty) FROM M_merchandise t WHERE 
    t.M_Product_ID=1013449  
    AND t.Customer_ID=1000008 
    AND t.movementtype IN('I+','M+','P+','V+','W+') 
    AND t.movementdate<(('2020-02-17'::date)- interval 'day 271') 
    AND t.rg_ID  =1000044 ) + 
    (SELECT SUM(t.movementqty) FROM M_merchandise t WHERE 
    t.M_Product_ID=1013449 
    AND t.Customer_ID =1000008  
    AND t.movementtype IN('I-','C-','M-','P-','V-','W-') 
    AND t.movementdate<('2020-02-17'::date) 
    AND t.rg_ID  = 1000002)) AS qty4,       -----no previous stock in previous 
    brackets

    (SELECT (SELECT SUM(t.movementqty) FROM M_merchandise t WHERE 
    t.M_Product_ID=1013449  
    AND t.Customer_ID =1000008 
    AND t.movementtype IN('I+','M+','P+','V+','W+') 
    AND t.movementdate<(('2020-02-17'::date)-interval 'day 366') 
    AND t.rg_ID  =1000044 ) + 
    (SELECT SUM(t.movementqty) FROM M_merchandise t WHERE 
    t.M_Product_ID=1013449 
    AND t.Customer_ID =1000008  
    AND t.movementtype IN('I-','C-','M-','P-','V-','W-') 
    AND t.movementdate<('2020-02-17'::date) 
    AND t.rg_ID  = 1000044 ) ) AS qty5,   


    (SELECT COALESCE((cos.NewCostPrice),0) 
    FROM  history cos 
    LEFT JOIN M_CostElement ce on ce.M_CostElement_UU='bf6ee9b8-4600-480b- 
    b415- 
    f94c698b0648'
    LEFT JOIN m_costdetail md ON md.m_costdetail_id=cos.m_costdetail_id
    WHERE prod.M_Product_ID = md.M_Product_ID AND prod.ProductType !='A'
    AND cos.Customer_ID =1000008 AND md.Schema_ID = 1000004 
    AND cos.created >= (('2020-02-17'::date) - interval '3 month' ) 
    AND cos.created < ('2020-02-17'::date)
    AND cos.M_CostElement_ID=ce.M_CostElement_ID
    AND cos.rg_ID  = CASE WHEN cos.rg_ID  =0 Then cos.rg_ID  ELSE  
    1000002  END 
    ORDER BY cos.created DESC limit 1
    )as Cost1,

    (SELECT COALESCE((cos.NewCostPrice),0) 
    FROM  history cos 
    LEFT JOIN M_CostElement ce on ce.M_CostElement_UU='bf6ee9b8-4600-480b- 
   b415- 
    f94c698b0648'
    LEFT JOIN m_costdetail md ON md.m_costdetail_id=cos.m_costdetail_id
    WHERE prod.M_Product_ID = md.M_Product_ID AND prod.ProductType !='A'
    AND cos.Customer_ID =1000008 AND md.Schema_ID= 1000004 
    AND cos.created < (('2020-02-17'::date) - interval '3 month') 
    AND cos.created < (('2020-02-17'::date) - interval '6 month')
    AND cos.M_CostElement_ID=ce.M_CostElement_ID
    AND cos.rg_ID  = CASE WHEN cos.rg_ID  =0 Then cos.rg_ID  ELSE  
    1000002  END 
    ORDER BY cos.created DESC limit 1
    )as Cost2,

    (SELECT COALESCE((cos.NewCostPrice),0) 
    FROM  history cos 
    LEFT JOIN M_CostElement ce on ce.M_CostElement_UU='bf6ee9b8-4600-480b- 
    b415- 
    f94c698b0648'
    LEFT JOIN m_costdetail md ON md.m_costdetail_id=cos.m_costdetail_id
    WHERE prod.M_Product_ID = md.M_Product_ID AND prod.ProductType !='A'
    AND cos.Customer_ID =1000008 AND md.Schema_ID = 1000004 
    AND cos.created >= (('2020-02-17'::date) - interval '12 month' ) 
    AND cos.created < (('2020-02-17'::date) - interval '6 month')
    AND cos.M_CostElement_ID=ce.M_CostElement_ID
    AND cos.rg_ID = CASE WHEN cos.rg_ID =0 Then cos.rg_ID ELSE  
     1000002  END 
    ORDER BY cos.created DESC limit 1
    )as Cost3,

    (SELECT COALESCE((cos.NewCostPrice),0) 
    FROM  history cos 
    LEFT JOIN M_CostElement ce on ce.M_CostElement_UU='bf6ee9b8-4600-480b-b415- 
     f94c698b0648'
    LEFT JOIN m_costdetail md ON md.m_costdetail_id=cos.m_costdetail_id
    WHERE prod.M_Product_ID = md.M_Product_ID AND prod.ProductType !='A'
    AND cos.Customer_ID =1000008 AND md.Schema_ID = 1000004 
    AND cos.created < (('2020-02-17'::date)- interval '12 month')  
    AND cos.M_CostElement_ID=ce.M_CostElement_ID
    AND cos.rg_ID  = CASE WHEN cos.rg_ID  =0 Then cos.rg_ID  ELSE 
    1000002  END 
    ORDER BY cos.created DESC limit 1
     ) as Cost4,

    (SELECT COALESCE (SUM (st.qtyonhand),0)FROM M_Storage st
    WHERE prod.M_Product_ID = st.M_Product_ID 
    AND st.rg_ID  = 1000044  AND prod.ProductType !='A'
    AND  st.DateMaterialPolicy <= ( '2020-02-17'::date) 
    ) as OnHand 

    (SELECT COALESCE((cos.NewCostPrice),0) 
    FROM  m_costhistory cos 
    LEFT JOIN CostElem ce on ce.M_CostElem_UU='bf6ee9b8-4600-480b-b415- 
    f94c698b0648'
    LEFT JOIN costd md ON md.m_costd_id=cos.m_c

1 Ответ

0 голосов
/ 23 февраля 2020

Ваш отрывок не выглядит синтаксически действительным для меня. Пожалуйста, покажите его в более широком контексте.

Как правило, вы можете взять общие условия и поместить их в предложение WHERE самого запроса, а также принять особые условия и поместить их в предложение WHERE фильтра FILTER.

Таким образом, вы можете получить что-то вроде этого: 

select 
  SUM(t.merchandiseqty) FILTER 
    (where t.merchandisetype IN('I+','M+','P+','V+','W+') AND t.merchandisedate<('2020-02-17'::date- interval 'day 271')) as whatever1,
  SUM(t.merchandiseqty) FILTER 
    (where t.merchandisetype IN ('I-','C-','M-','P-','V-','W-') AND t.merchandisedate<('2020-02-17'::date)) as qty1
FROM t WHERE t.M_merchandise_ID=1013449 AND t.customer_ID =1000008

Поскольку ваш пример был неполным, мне пришлось заполнить пробелы интуицией.

Возможно, было бы полезно переместить наименее ограничивающие условия мерчендайзата из ФИЛЬТРА в основной ГДЕ.

...