Question

我在我的CI应用程序中使用Mysql和Oracle。我试图连接它，但我发现我无法查询Oracle数据库。它总是给出表不存在的错误。

我已经将database.php设置为类似这样的

＆＃13;

$active_group = 'oracle';
$active_record = true;

$db['oracle']['hostname'] = '10.10.10.1:1521/ocidb';
$db['oracle']['username'] = 'ociuser';
$db['oracle']['password'] = 'ocipass';
$db['oracle']['database'] = 'ocidb';
$db['oracle']['dbdriver'] = 'oci8';
$db['oracle']['dbprefix'] = '';
$db['oracle']['pconnect'] = TRUE;
$db['oracle']['db_debug'] = FALSE;
$db['oracle']['cache_on'] = FALSE;
$db['oracle']['cachedir'] = '';
$db['oracle']['char_set'] = 'utf8';
$db['oracle']['dbcollat'] = 'utf8_general_ci';
$db['oracle']['swap_pre'] = '';
$db['oracle']['autoinit'] = TRUE;
$db['oracle']['stricton'] = FALSE;

$active_group = 'default';
$active_record = TRUE;

$db['default']['hostname'] = 'localhost';
$db['default']['username'] = 'root';
$db['default']['password'] = '';
$db['default']['database'] = 'mysqldb';
$db['default']['dbdriver'] = 'mysql';
$db['default']['dbprefix'] = '';
$db['default']['pconnect'] = TRUE;
$db['default']['db_debug'] = TRUE;
$db['default']['cache_on'] = FALSE;
$db['default']['cachedir'] = '';
$db['default']['char_set'] = 'utf8';
$db['default']['dbcollat'] = 'utf8_general_ci';
$db['default']['swap_pre'] = '';
$db['default']['autoinit'] = TRUE;
$db['default']['stricton'] = FALSE;

＆＃13;

在控制器中，我想查询oracle中的表，所以我将其加载到那里。

＆＃13;

function citizen(){
  $this->load->database('oracle',true);

  $data['someone'] = $this->people_model->getPeople();
  
  $this->load->view('myview',$data);
}

＆＃13;

这是people_model

＆＃13;

function getPeople(){
  return $this->db->get('people')->result();
}

＆＃13;

当我运行它时，它会出错

＆＃13;

Error Number: 1146

Table 'mysqldb.people' doesn't exist

SELECT * FROM (`people`) WHERE `id` = '21111'

＆＃13;

似乎它仍然使查询进入mysql，而表人们在oracle中。我也尝试在模型中而不是在控制器中加载oracle数据库，但结果相同。

在这种情况下，如何查询oracle。任何答案将不胜感激。感谢。

Answer 1

我使用Codeigniter与oracle和mysql合作。

您使用$this->load->database('oracle',true);这应该分配给变量，因为您使用了第二个参数true。像这样

$oracle_db=$this->load->database('oracle',true);//connected with oracle
$mysql_db=$this->load->database('default',true);//connected with mysql

现在你可以将这两个变量用于你的查询。喜欢

$oracle_db->get('people')->result();

或

$mysql_db->get('people')->result();

所以最后你的模型应该是这样的（不要在你的控制器上加载数据库）

function __construct()//model construct function
{
    parent::__construct();
    $this->oracle_db=$this->load->database('oracle',true);
    $this->mysql_db=$this->load->database('default',true);
}
function getPeople(){
   return $this->oracle_db->get('people')->result();
}

希望你能理解。确保它与您的oracle db连接。

我的oracle数据库.php是这样的

$tns = "
(DESCRIPTION =
    (ADDRESS_LIST =
      (ADDRESS = (PROTOCOL = TCP)(HOST = YOUR_IP)(PORT = 1521))
    )
    (CONNECT_DATA =
      (SID = YOUR_SID)
    )
  )
       ";
$db['oracle']['hostname'] = $tns;

Answer 2

您必须加载数据库并且必须使用该对象从数据库进行查询

$oracle =  $this->load->database('oracle',true);
$query = $oracle->query("SELECT * FROM people");

并将pconnect标志更改为false，因为CI在维护与多个数据库的持久连接方面存在问题。

Answer 3

尝试这样对我有用

$active_group = 'oracle';
$query_builder = TRUE;

$db['oracle'] = array(
    'dsn'   => '',
    'hostname' => '192.168.0.246:1521/orcl',
    //'hostname' => 'localhost',
    'username' => 's_dev0101', 
    'password' => 's_dev0101',
    'database' => 'testdb',
    'dbdriver' => 'oci8',
    'dbprefix' => '',
    'pconnect' => FALSE,
    'db_debug' => (ENVIRONMENT !== 'production'),
    'cache_on' => FALSE,
    'cachedir' => '',
    'char_set' => 'utf8',
    'dbcollat' => 'utf8_general_ci',
    'swap_pre' => '',
    'encrypt' => FALSE,
    'compress' => FALSE,
    'stricton' => FALSE,
    'failover' => array(),
    'save_queries' => TRUE,
    'save_queries' => TRUE,
);


$active_group = 'default';
$query_builder = TRUE;

$db['default'] = array(
    'dsn'   => '',
    'hostname' => '192.168.0.106', //192.168.0.106
    //'hostname' => 'localhost',
    'username' => 'aaa',
    'password' => 'aaa',
    'database' => 'ttttt',
    'dbdriver' => 'mysqli',
    'dbprefix' => '',
    'pconnect' => FALSE,
    'db_debug' => (ENVIRONMENT !== 'production'),
    'cache_on' => FALSE,
    'cachedir' => '',
    'char_set' => 'utf8',
    'dbcollat' => 'utf8_general_ci',
    'swap_pre' => '',
    'encrypt' => FALSE,
    'compress' => FALSE,
    'stricton' => FALSE,
    'failover' => array(),
    'save_queries' => TRUE
);

在模型中：

public $db;

    function __construct()
    {
        parent::__construct();

        $this->db = $this->load->database('default',true);//connected with mysql
        $oracle_db = $this->load->database('oracle',true);//connected with oracle
        var_dump($oracle_db);
    }

在同一个应用程序中将codeigniter连接到mysql和oracle

3 个答案: