爲什麼這個存儲一點兒也不返回結果

Question

我創建了這個存儲功能，建設先進的搜索過程，但我注意到，雖然我嘗試代碼不正確使用存儲在任何它返回結果

我認爲它不會返回任何結果參數有問題SearchWord

DELIMITER // 
CREATE PROCEDURE AdvancedSearch(IN SearchWord VARCHAR(255)) 
    BEGIN 
    SELECT * FROM (

        SELECT CustomerId AS id,CustomerCompany AS name ,null AS descrip,null AS FileName 
        FROM tbcustomers 
         LEFT JOIN tbfiles ON tbcustomers.CustomerId = tbfiles.CatId AND tbfiles.ModuleName = "customers" 
        WHERE tbcustomers.CustomerCompany LIKE CONCAT('%', @SearchWord , '%') 

        UNION 
        SELECT DeviceId AS id,DeviceName AS name,DeviceDesc AS descrip,FileName 
        FROM tbdevices 
         LEFT JOIN tbfiles ON tbdevices.DeviceId = tbfiles.CatId AND tbfiles.ModuleName = "devices" 
        WHERE tbdevices.DeviceName LIKE CONCAT('%', @SearchWord , '%') 
          OR tbdevices.DeviceDesc LIKE CONCAT('%', @SearchWord , '%') 
          OR tbdevices.DeviceProperties LIKE CONCAT('%', @SearchWord , '%') 

        UNION 
        SELECT HostingId AS id,HostingName AS name,HostingType AS descrip,FileName 
        FROM tbhosting 
         LEFT JOIN tbfiles ON tbhosting.HostingId = tbfiles.CatId AND tbfiles.ModuleName = "hosting" 
        WHERE tbhosting.HostingName LIKE CONCAT('%', @SearchWord , '%') 
          OR tbhosting.HostingType LIKE CONCAT('%', @SearchWord , '%') 
          OR tbhosting.HostingSpace LIKE CONCAT('%', @SearchWord , '%') 
          OR tbhosting.HostingRam LIKE CONCAT('%', @SearchWord , '%') 
          OR tbhosting.HostingUsage LIKE CONCAT('%', @SearchWord , '%') 
          OR tbhosting.HostingUsagebases LIKE CONCAT('%', @SearchWord , '%') 

        UNION 
        SELECT PageId AS id,PageTitle AS name,PageDesc AS descrip,FileName 
        FROM tbpages 
         LEFT JOIN tbfiles ON tbpages.PageId = tbfiles.CatId AND tbfiles.ModuleName = "pages" 
        WHERE tbpages.PageTitle LIKE CONCAT('%', @SearchWord , '%') 
          OR tbpages.PageDesc LIKE CONCAT('%', @SearchWord , '%') 
          OR tbpages.PageSubject LIKE CONCAT('%', @SearchWord , '%') 


        UNION 
        SELECT ProductId AS id,ProductName AS name,ProductDesc AS descrip,FileName 
        FROM tbproducts 
         LEFT JOIN tbfiles ON tbproducts.ProductId = tbfiles.CatId AND tbfiles.ModuleName = "products" 
        WHERE tbproducts.ProductName LIKE CONCAT('%', @SearchWord , '%') 
          OR tbproducts.ProductTitle LIKE CONCAT('%', @SearchWord , '%') 
          OR tbproducts.ProductDesc LIKE CONCAT('%', @SearchWord , '%') 
          OR tbproducts.ProductProperties LIKE CONCAT('%', @SearchWord , '%') 
          OR tbproducts.ProductPrice LIKE CONCAT('%', @SearchWord , '%') 
          OR tbproducts.ProductNumVersion LIKE CONCAT('%', @SearchWord , '%') 

        UNION 
        SELECT ProjectId AS id,ProjectName AS name,ProjectDesc AS descrip,FileName 
        FROM tbprojects 
         LEFT JOIN tbfiles ON tbprojects.ProjectId = tbfiles.CatId AND tbfiles.ModuleName = "projects" 
        WHERE tbprojects.ProjectName LIKE CONCAT('%', @SearchWord , '%') 
          OR tbprojects.ProjectDesc LIKE CONCAT('%', @SearchWord , '%') 
       ) AS v 
    WHERE v.name != '' 
    GROUP BY v.id; 
    END // 
DELIMITER ; 

Answer 1

參數名稱是SearchWord但是您在過程的主體中使用它作爲@SearchWord。刪除@symbol，它會起作用