postgresql的帮助与PHP循环

我不断收到一个“通知：未定义的索引：做”这个查询错误，我不明白为什么...我更习惯于mysql，所以，也许语法是错误？postgresql的帮助与PHP循环

这是PHP的查询代码：

function get_demos() { 
     global $session; 
     $demo = array(); 
     $result = pg_query("SELECT DISTINCT(did,vid,iid,value) FROM dv"); 
     if(pg_num_rows($result) > 0) { 
      while($r = pg_fetch_array($result)) { 
       switch($r['did']) { 
        case 1: 
         $demo['a'][$r['vid']] = $r['value']; 
         break; 
        case 2: 
         $demo['b'][$r['vid']] = $r['value']; 
         break; 
        case 3: 
         $demo['c'][$r['vid']] = $r['value']; 
         break; 
       } 
      } 
     } else { 
      $session->session_setMessage(2); 
     } 

     return $demo; 
    }

当我运行该查询在PG提示，我得到的结果：

"(1,1,1,"A")" 
"(1,2,2,"B")" 
"(1,3,3,"C")" 
"(1,4,4,"D")" 
"(1,5,5,"E")" 
"(1,6,6,"F")" 
"(1,7,7,"G")" 
"(1,8,8,"H")" 
"(1,9,9,"I")" 
"(1,10,A,"J")" 
"(1,11,B,"K")" 
"(1,12,C,"L")" 
"(1,13,D,"M")" 
"(2,14,1,"A")" 
"(2,15,2,"B")" 
"(2,16,0,"C")" 
"(3,17,1,"A")" 
"(3,18,2,"B")" 
"(3,19,3,"C")" 
"(3,20,4,"D")" 
"(3,21,5,"E")" 
"(3,22,6,"F")" 
"(3,23,7,"G")"

来源

2010-03-14 TwixxyKit

在你的while循环中尝试'var_dump（$ r）' – 2010-03-14 16:12:46

实际上，我们发现DISTINCT是它不喜欢的东西...... – TwixxyKit 2010-03-14 16:26:55

然后请给你自己的问题写一个答案并接受它（在48 ？hours） – VolkerK 2010-03-14 17:59:11

，如果你想获得联想必须使用pg_fetch_assoc()功能数组$ r。

来源

2010-03-14 17:33:57

pg \ _fetch \ _array（）默认返回数字_and_关联索引，请参阅http://docs.php.net/pg_fetch_array – VolkerK 2010-03-14 17:56:59

postgresql的帮助与PHP循环

回答

相关问题