No function matches the given name and argument types. You might need to add explicit type casts postgrepsql數據庫

今天在寫項目的時候，遇到了一個比價頭疼的問題：

ifnull.............

No function matches the given name and argument types. You might need to add explicit type casts

 

現在公司用的是postgrepsql數據庫，自己用navicat連接的，屁顛屁顛的還當是mysql的函數語法來用的，扣了半天，原來才發現，pg數據庫中根本就沒有ifnull這個函數，

可以使用COALESCE函數代替。

這是改正確之后的sql語句：

SELECT tt.NAME, tt.sex, tt.idcardtype, tt.idcard, tt.mobile
    , tt.birthday, tt.ID, tt.vipid, tt.cardno, tt.cardtypename
    , tt.cardtypecode, tt.gradetypename, tt.status, tt.TYPE, tt.changecardno
    , tt.changecardnoflag, tt.PASSWORD, tt.accountmoneytype, tt.networktype, tt.usertype
    , tt.money, tt.points, tt.couponcnt, tt.relatedcnt,
    COALESCE ( tt.comname, tt.unitname ) as unitname,
    tt.refereecode,
      tt.insuretype, tt.starteffectdate, tt.endeffectdate, tt.uniagentcode, tt.unisaleschannel
    , tt.unisalesbusitype
FROM (
    SELECT vip.NAME, vip.sex, vip.idcardtype, vip.idcard, vip.mobile
        , vip.birthday, acc.ID, acc.vipid
        , CASE 
            WHEN acc.cardno IS NULL THEN acc.changecardno
            ELSE acc.cardno
        END AS cardno, acc.cardtypename, acc.cardtypecode, acc.gradetypename, acc.status
        , acc.TYPE, acc.changecardno, acc.changecardnoflag, acc.PASSWORD, acc.accountmoneytype
        , acc.networktype, acc.usertype, mon.money, mon.points
        , CASE 
            WHEN cp.couponcnt IS NULL THEN 0
            ELSE cp.couponcnt
        END AS couponcnt
        , (
            SELECT COUNT(0)
            FROM vip_accountrelated T
            WHERE T.vipid = vip.ID
                AND T.accountid = acc.ID
                AND T.dr = 0
        ) AS relatedcnt
        , (
            SELECT t1.unit_name::VARCHAR
            FROM up_org_unit t1, up_org_unit_ext t2
            WHERE t1.unit_id = t2.unit_id
                AND t2.unit_uncode = vip.unitid
        ) AS unitname
        , (
            SELECT t1.unit_name::VARCHAR
            FROM up_org_unit t1, up_org_unit_ext t2
            WHERE t1.unit_id = t2.unit_id
                AND t2.unit_uncode = acc.sendunitid
        ) AS comname, acc.refereecode, vip.insuretype, acc.starteffectdate, acc.endeffectdate
        , acc.uniagentcode, acc.unisaleschannel, acc.unisalesbusitype
    FROM VIP_ACCOUNT acc, VIP_INFO vip, VIP_ACCOUNTMONEY mon, (
            SELECT ac.accountid, COUNT(0) AS couponcnt
            FROM VIP_ACCOUNTCOUPON ac, VIP_COUPON cou
            WHERE ac.couponcode = cou.code
                AND cou.status = 1
                AND ac.dr = 0
                AND cou.dr = 0
            GROUP BY ac.accountid
        ) cp
    WHERE acc.vipid = vip.ID
        AND acc.ID = mon.ID
        AND acc.ID = cp.accountid
        AND acc.dr = 0
        AND vip.dr = 0
        AND mon.dr = 0
) tt
ORDER BY tt.usertype OFFSET ( ?- 1 ) * ? 
    LIMIT ?

推薦一個網址：產看pgsql常用的函數：

https://www.cnblogs.com/personblog/p/11042105.html