Question

我真的非常绝望地在这个问题上，我找不到任何有用的参考通过谷歌，虽然这是容易解决。至少我是这么想的。

出于性能原因，我替换了一个函数来使用Postgres的递归WITH查询。我的问题： pg_fetch_object只返回一行，但pg_num_rows返回正确的行数（104）。查询本身没问题，我用其他查询工具得到了干净的结果。

我希望有人可以帮助我，我需要使用pg_fetch_object来收集查询结果的所有行，而不仅仅是第一行。我不知道我做错了什么。这是代码：

public function getSelfAndAncestorsRecursive($id) {
    $animal = array();
    if ($id != "") {

//Here comes the query string
$query = "WITH RECURSIVE Ancestors AS
(SELECT 
animals.id, animals.name, animals.\"animalID\",
animals.sex, animals.\"birthDate\", animals.alive, animals.deleted, cages.\"cageName\",
animals.dummy_strain_info AS strain, animals.dummy_line_info AS line, animals.dummy_gen_info AS gene,
animals.generation, animals.dummy_backcross_info,
animals.\"parentMale\" AS sire, animals.\"parentFemale\" AS dam
FROM animals
LEFT OUTER JOIN cages ON \"homeCage\" = cages.id
WHERE animals.id = ".$id
."UNION ALL
SELECT a.id, a.name, a.\"animalID\", 
a.sex, a.\"birthDate\", a.alive, a.deleted, c.\"cageName\", 
a.dummy_strain_info AS Astrain, a.dummy_line_info AS Aline, a.dummy_gen_info AS Agene,
a.generation, a.dummy_backcross_info,
a.\"parentMale\" AS Asire, a.\"parentFemale\" AS Adam
FROM animals a
LEFT OUTER JOIN cages c ON a.\"homeCage\" = c.id
INNER JOIN Ancestors n ON a.id = n.sire::int8 OR a.id = n.dam::int8
)
SELECT DISTINCT * FROM Ancestors
ORDER BY id DESC;";


//Parse Query and fetch result
  $res = pg_query($query);
  while ($row = pg_fetch_object($res) {

      //Set array values
      $animal["id"] = $row->id;
      $animal["name"] = $row->name;
      $animal["animal_id"] = $row->animalID;
      $animal["birth_date"] = $row->birthDate;
      $animal["sex"] = $row->sex;
      $animal["alive"] = $row->alive;
      $animal["deleted"] = $row->deleted;
      $animal["cage"] = $row->cageName;
          $animal["strain"] = $row->strain;
          $animal["line"] = $row->line;
          $animal["gene"] = $row->gene;
          $animal["generation"] = $row->generation;
          $animal["backcross"] = $row->dummy_backcross_info;
          $animal["sire"] = $row->sire;
          $animal["dam"] = $row->dam;      
    }

    }
    return $animal;
  }

Answer 1

是的，谢天谢地，但实际上并不是我需要知道的。当使用pg_fetch_all时，我得到一个我无法使用的基于多维索引的数组。

说实话，我很难调换数组（[0] =＆gt;数组（[id] =＆gt; 12345 ... 至数组（[id] =＆gt; 380619 ......

但我会继续尝试自己

PG_Fetch_Objects仅返回递归查询中的一行

1 个答案: