Question

我只是在PHP中为临时表尝试此查询，但在PHP中不起作用。

IF OBJECT_ID('tempdb..##t1') IS NOT NULL
    DROP TABLE ##t1
select 'rec1' as col1 into ##t1;
select * from ##t1

PHP代码：

$database = new SQL_DB;
$database->query(
  "
  IF OBJECT_ID('tempdb..##t1') IS NOT NULL
    DROP TABLE ##t1

  SELECT 'rec1' as col1 into ##t1;
  SELECT * FROM ##t1;
  "
);
$rows = $database->resultset();

SQL_DB类（简化）：

public function __construct(){
    //Set DSN
    $dsn = 'sqlsrv:Server=' . $this->host . ';Database=' . $this->dbname;
    //Set options
    /*$options = array(
        PDO::ATTR_EMULATE_PREPARES => true,
        PDO::SQLSRV_ATTR_ENCODING => PDO::SQLSRV_ENCODING_UTF8
    );*/
    $options = array(
      PDO::SQLSRV_ATTR_QUERY_TIMEOUT => $this->TIMEOUT,
      PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION,
      PDO::ATTR_EMULATE_PREPARES => false
    );
    //Create a new PDO instance
    try {
        $this->dbh = new PDO($dsn, $this->user, $this->pass, $options);
        // $this->dbh->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION );
    } catch (PDOException $e) {
        $this->error = $e->getMessage();
    }
}

//Prepare statement
public function query($query) {
    $this->stmt = $this->dbh->prepare($query);
}

//Return result Set
public function resultset($in = "") {
  try{
    if ($in == ""){
      $this->stmt->execute();
    }
    else{
      $this->stmt->execute($in);
    }
    return $this->stmt->fetchAll(PDO::FETCH_ASSOC);
  }
  catch (PDOException $e) {
      $this->error = $e->getMessage();
  }
}

它在Microsost SQL Server Management Studio中可以正常工作，而我在PHP中使用过的所有其他查询也可以正常工作，因此它不是任何连接问题。
它肯定与临时表和“＃”有关。

我想念什么？

更新：

如果我将查询分为两部分，它就可以正常工作：

$database = new SQL_DB;
$database->query(
  "
  IF OBJECT_ID('tempdb..##t1') IS NOT NULL
      DROP TABLE ##t1
  SELECT 'rec1' as col1 into ##t1;
"
);
$database->resultset();
$database->query(
  "
  SELECT * from ##t1;
"
);
$rows = $database->resultset();

Answer 1

原来问题不是临时表，而是PDO对于多个结果集的工作方式。
解决方法只是更改获取结果的方式（在本例中为获取最后一个结果集）：

public function lastresultset($in = "") {
  try{
    if ($in == ""){
      $this->stmt->execute();
    }
    else{
      $this->stmt->execute($in);
    }
    $result = $this->stmt->fetchAll(PDO::FETCH_ASSOC);
    while($this->stmt->nextRowset()){
      $result = $this->stmt->fetchAll(PDO::FETCH_ASSOC);
    };
    return $result;
  }
  catch (PDOException $e) {
      $this->error = $e->getMessage();
  }
}

如何使用临时表获取查询以在PHP中工作？

1 个答案: