加快查詢內循環？

Question

我正在獲取xml提要，解析並存儲到數據庫。

歐洲飼料有時候會有一些球隊，比如哪個國家是歐洲，而不是英格蘭，德國，塞爾維亞等。只是歐洲，所以我創建了包含所有國家隊列的所有國家和地圖表。

所以我要檢查團隊內表地圖，國家= $ countryfromarray，這作品時，我有一個團隊，例如嘗試，但我得到的團隊從飼料，飼料中的約5000支球隊。

if((strtolower($country) == 'southamerica') or (strtolower($country) == 'conmebol')){ 
     $countries = $this->conmebolarray; 
     $isregion = true; 
    } 
    elseif((strtolower($country) == 'europe') or (strtolower($country) == 'uefa')){ 
     $countries = $this->euroarray; 
     $isregion = true; 
    } 
    elseif((strtolower($country) == 'asia') or (strtolower($country) == 'afc')){ 
     $countries = $this->afcarray; 
     $isregion = true; 
    } 
    elseif((strtolower($country) == 'africa') or (strtolower($country) == 'caf')){ 
     $countries = $this->cafarray; 
     $isregion = true; 
    } 
    elseif((strtolower($country) == 'northandcentralamerica') or (strtolower($country) == 'concacaf')){ 
     $countries = $this->conarray; 
     $isregion = true; 
    } 
    else{ 
     $countries = $country; 
     $isregion = false; 
    } 
    //$res = ''; 
    if($isregion){ 
     $query = $PDO->prepare($sql); 
     $newcountry = ''; 
     foreach($countries as $loopcountry){ 
      $query->bindValue(':data', $data); 
      $query->bindValue(':country', $loopcountry); 
      // 
      if($query->execute()) 
      { 
      if($query->rowCount()>0){ 
       $res = $query->fetchColumn(); 
       $newcountry = $loopcountry; 
       break; 
      } 
      $query->closeCursor(); 
      } 
     } 

國家的陣列和：

//"southamerica" & "conmebol" & "CONMEBOL"; 
public $conmebolarray = array('argentina','brazil','chile','colombia','paraguay','uruguay','venezuela','peru','bolivia','ecuador','newzealand'); 

//"europe" & "uefa" & "Europe" & "UEFA"; 
public $euroarray = array('england','france','germany','italy','spain','scotland','albania','andorra','armenia','austria','azerbaijan','belarus','belgium','bosnia','bulgaria','croatia','cyprus','czech','denmark','estonia','faroeislands','georgia','gibraltar','greece','hungary','iceland','israel','kazakhstan','latvia','liechtenstein','luxembourg','malta','moldova','montenegro','netherlands','northernireland','norway','poland','portugal','ireland','romania','russia','sanmarino','serbia','slovakia','slovenia','sweden','switzerland','turkey','ukraine','wales','europe'); 

//"asia" & "afc" & "Asia" & "AFC"; 
public $afcarray = array('australia','japan','korea','singapore','china','qatar','saudiarabia','vietnam','bahrain', 
'bangladesh','bhutan','brunei','cambodia','chinesetaipei','guam','hongkong','india','indonesia','iran','iraq','japan','korea', 
'northkorea','kuwait','kyrgyzstan','laos','lebanon','macau','malaysia','maldives','mongolia','myanmar','nepal', 
'northernmarianaislands','oman','pakistan','palestine','philippines','srilanka','syria','tajikistan','thailand','timorleste','turkmenistan','uae','uzbekistan','yemen','newzealand','asia','afc'); 

//"africa" & "caf" & "Africa" & "CAF"; 
public $cafarray = array('nigeria','southafrica','egypt','tunisia','algeria','morocco','cameroon','drcongo','ivorycoast','ghana','djibouti','eritrea','ethiopia','kenya','rwanda','somalia','southsudan','sudan','tanzania','uganda','zanzibar','angola', 
'botswana','comoros','lesotho','madagascar','malawi','mauritius','mozambique','namibia','seychelles','swaziland','zambia', 
'zimbabwe','reunion','burundi','saotomeandprincipe','gabon','equatorialguinea','congo','chad','centralafricanrepublic','togo', 
'sierraleone','senegal','niger','mauritania','mali','liberia','guineabissau','guinea','gambia','capeverde','burkinafaso', 
'benin','libya','africa','caf'); 

//"northandcentralamerica" & "concacaf" & "CONCACAF"; 
public $conarray = array('usa','mexico','canada','costarica','elsalvador','guatemala','honduras','trinidadandtobago','jamaica', 
'panama','honduras','haiti','cuba','belize','dominicanrepublic','bermuda','aruba','barbados','grenada','surinam', 
'guadeloupe', 'antigua','antiguaandbarbuda','saintvincent','saintvincentandthegrenadines','saintkittsandnevis', 
'saintlucia','nicaragua','curacao','puertorico','guyana','dominica','usvirginislands','montserrat','caymanislands', 
'turksandcaicos','turksandcaicosislands','britishvirginislands','bahamas','anguilla','frenchguiana','martinique', 
'saintmartin','sintmarteen','bonaire','concacaf','northandcentralamerica'); 

而且GetMap操作過程

CREATE PROCEDURE GetMap(p_team VARCHAR(100), p_country VARCHAR(100)) 
BEGIN 
SELECT Base FROM map WHERE 
(map.Base = p_team OR 
Ver1 = p_team OR 
Ver2 = p_team OR 
Ver3 = p_team OR 
Ver4 = p_team OR 
Ver5 = p_team OR 
Ver6 = p_team OR 
Ver7 = p_team OR 
Ver8 = p_team OR 
Ver9 = p_team OR 
Ver10 = p_team OR 
Ver11 = p_team OR 
Ver12 = p_team) AND Country = p_country; 
end // 
DELIMITER ; 

Answer 1

沒有絕對的把握有什麼不對您的查詢。考慮到你有適當的map表索引;你可以修改你的查詢有點像下面。看起來像一個覆蓋索引會加快這個查詢。

SELECT Base 
FROM map 
WHERE 
p_team IN (Ver1, Ver2, Ver3, Ver4, Ver5, Ver6, Ver7, Ver8, Ver9, Ver10, Ver11, Ver12, Base) 
AND Country = p_country;