mySQL語法與OR

Question

我在MySQL查詢語法問題。我使用的地方，我想通過函數

protected function generateAlias($tag = null) 
{ 
    return '___' . $tag . '_' . $this->aliasCounter++; 
}  



public function filterKnownUsers(\Tuxie\Bundle\TuxieBundle\Entity\User $user, $addMyUser = false) 
    { 
     $alias = $this->generateAlias(); 

     $query = "SELECT {$alias}_u2.userId FROM Tuxie\\Bundle\\TuxieBundle\\Entity\\TicketUser {$alias}_u1 
    JOIN Tuxie\\Bundle\\TuxieBundle\\Entity\\TicketUser {$alias}_u2 WITH {$alias}_u1.ticketId = {$alias}_u2.ticketId 
    WHERE {$alias}_u1.userId = :{$alias}_user"; 

     if($addMyUser === true) { 

      $this->where("root.userId IN ($query) OR ({$alias}_u2.userId) "); 
     } 
     else { 

      $this->where("root.userId IN ($query)"); 
     } 

     $this->setParameter("{$alias}_user", $user); 
     return $this; 
    } 

過濾knownusers的Symfony2的所以如果在機能的研究第二個參數是真正的過濾器應使用或聲明，給我唯一的實際用戶。可惜的是我得到語法錯誤

[2/2] QueryException: [Syntax Error] line 0, col 354: Error: Expected =, <, <=, <>, >, >=, !=, got ')'

[1/2] QueryException: SELECT root FROM Tuxie\Bundle\TuxieBundle\Entity\User root WHERE (root.email IS NOT NULL AND (root.userId IN (SELECT ____0_u2.userId FROM Tuxie\Bundle\TuxieBundle\Entity\TicketUser ____0_u1 JOIN Tuxie\Bundle\TuxieBundle\Entity\TicketUser ____0_u2 WITH ____0_u1.ticketId = ____0_u2.ticketId WHERE ____0_u1.userId = :____0_user) OR (____0_u2.userId))) AND root.clientId IS NOT NULL

else { 

     $this->where("root.userId IN ($query)"); 
    } 

工作正常。所以問題已經到位

$this->where("root.userId IN ($query) OR ({$alias}_u2.userId) "); 

關於正確的語法是什麼的任何想法？

Answer 1

({$alias}_u2.userId)對於SQL不是合適的條件。你需要將這個值與某個東西進行比較。

'東西'取決於你的表格定義。一些可能性：

({$alias}_u2.userId != '') -- for varchar 
({$alias}_u2.userId > -1) -- for int 
({$alias}_u2.userId NOT NULL) -- for nullable 

可用表情豐富的文檔：
https://dev.mysql.com/doc/refman/5.5/en/expressions.html