Connection.php
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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
namespace think\oracle;
use PDO;
use think\db\Connection as BaseConnection;
/**
* Oracle数据库驱动
*/
class Connection extends BaseConnection
{
protected $builder = '\\think\\oracle\\Builder';
/**
* 解析pdo连接的dsn信息
* @access protected
* @param array $config 连接信息
* @return string
*/
protected function parseDsn($config)
{
$dsn = 'oci:dbname=';
if (!empty($config['hostname'])) {
// Oracle Instant Client
$dsn .= '//' . $config['hostname'] . ($config['hostport'] ? ':' . $config['hostport'] : '') . '/';
}
$dsn .= $config['database'];
if (!empty($config['charset'])) {
$dsn .= ';charset=' . $config['charset'];
}
return $dsn;
}
/**
* 取得数据表的字段信息
* @access public
* @param string $tableName
* @return array
*/
public function getFields($tableName)
{
$this->initConnect(true);
list($tableName) = explode(' ', $tableName);
$sql = "select a.column_name,data_type,DECODE (nullable, 'Y', 0, 1) notnull,data_default, DECODE (A .column_name,b.column_name,1,0) pk from all_tab_columns a,(select column_name from all_constraints c, all_cons_columns col where c.constraint_name = col.constraint_name and c.constraint_type = 'P' and c.table_name = '" . strtoupper($tableName) . "' ) b where table_name = '" . strtoupper($tableName) . "' and a.column_name = b.column_name (+)";
$pdo = $this->linkID->query($sql);
$result = $pdo->fetchAll(PDO::FETCH_ASSOC);
$info = [];
if ($result) {
foreach ($result as $key => $val) {
$val = array_change_key_case($val);
$info[$val['column_name']] = [
'name' => $val['column_name'],
'type' => $val['data_type'],
'notnull' => $val['notnull'],
'default' => $val['data_default'],
'primary' => $val['pk'],
'autoinc' => $val['pk'],
];
}
}
return $this->fieldCase($info);
}
/**
* 取得数据库的表信息（暂时实现取得用户表信息）
* @access public
* @param string $dbName
* @return array
*/
public function getTables($dbName = '')
{
$pdo = $this->linkID->query("select table_name from all_tables");
$result = $pdo->fetchAll(PDO::FETCH_ASSOC);
$info = [];
foreach ($result as $key => $val) {
$info[$key] = current($val);
}
return $info;
}
/**
* 获取最近插入的ID
* @access public
* @param string $sequence 自增序列名
* @return string
*/
public function getLastInsID($sequence = null)
{
$pdo = $this->linkID->query("select {$sequence}.currval as id from dual");
$result = $pdo->fetchColumn();
return $result;
}
/**
* SQL性能分析
* @access protected
* @param string $sql
* @return array
*/
protected function getExplain($sql)
{
return [];
}
protected function supportSavepoint()
{
return true;
}
}