在PHP PDO如何讓「迴歸」的PostgreSQL子句值UPSERT查詢

Question

我已經寫在PostgreSQL這個UPSERT查詢

$statement = 'INSERT INTO "CharactersUnlockToBuyLevels" 
       ("CharacterId", "LevelId", "AmountToBuy", "EagleStatueId", "Location", 
       "MapCoordinateTop", "MapCoordinateLeft") 
       VALUES 
       (:CharacterId, :LevelId, :AmountToBuy, :EagleStatueId, :Location, 
       :MapCoordinateTop, :MapCoordinateLeft) 
       ON CONFLICT 
       ("CharacterId") 
       DO UPDATE 
       SET 
        "LevelId" = EXCLUDED."LevelId", 
        "AmountToBuy" = EXCLUDED."AmountToBuy", 
        "EagleStatueId" = EXCLUDED."EagleStatueId", 
        "Location" = EXCLUDED."Location", 
        "MapCoordinateTop" = EXCLUDED."MapCoordinateTop", 
        "MapCoordinateLeft" = EXCLUDED."MapCoordinateLeft"        
       RETURNING "CharacterUnlockToBuyLevelId" 
      '; 

查詢工作正常，如果我在pgAdmin的運行它，我得到了「 CharacterUnlockToBuyLevelId「回到預期狀態。但是，如果我準備並使用PHP的PDO執行它，那麼我似乎無法獲得RETURNING值。

$stmt = $this->db->prepare($statement); 
$returnedId = $stmt->execute(array(
    'CharacterId' => $characterId, 
    'LevelId' => $unlockMethod['LevelId'], 
    'AmountToBuy' => $unlockMethod['AmountToBuy'], 
    'EagleStatueId' => $unlockMethod['EagleStatueId'], 
    'Location' => $unlockMethod['Location'], 
    'MapCoordinateTop' => $unlockMethod['MapCoordinateTop'], 
    'MapCoordinateLeft' => $unlockMethod['MapCoordinateLeft'], 
)); 

這只是返回true，所以$returnedId不會實際持有的ID，但只值true。如何使用PDO準備好的語句從upsert查詢中獲取RETURNING值？

Answer 1

從http://php.net/manual/en/pdostatement.execute.php：

公共BOOL PDOStatement對象::執行（[數組$ input_parameters]）

得到返回VAL，嘗試fetchAll

$stmt = $this->db->prepare($statement); 
$returnedId = $stmt->execute(array(
    'CharacterId' => $characterId, 
    'LevelId' => $unlockMethod['LevelId'], 
    'AmountToBuy' => $unlockMethod['AmountToBuy'], 
    'EagleStatueId' => $unlockMethod['EagleStatueId'], 
    'Location' => $unlockMethod['Location'], 
    'MapCoordinateTop' => $unlockMethod['MapCoordinateTop'], 
    'MapCoordinateLeft' => $unlockMethod['MapCoordinateLeft'], 
)); 
$yourVal=$stmt->fetchAll();