Oracle.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\db\builder;
use think\db\Builder;
use think\db\Query;
/**
* Oracle数据库驱动
*/
class Oracle extends Builder
{
protected $selectSql = 'SELECT * FROM (SELECT thinkphp.*, rownum AS numrow FROM (SELECT %DISTINCT% %FIELD% FROM %TABLE%%JOIN%%WHERE%%GROUP%%HAVING%%ORDER%) thinkphp ) %LIMIT%%COMMENT%';
/**
* limit分析
* @access protected
* @param Query $query 查询对象
* @param mixed $limit
* @return string
*/
protected function parseLimit(Query $query, $limit)
{
$limitStr = '';
if (!empty($limit)) {
$limit = explode(',', $limit);
if (count($limit) > 1) {
$limitStr = "(numrow>" . $limit[0] . ") AND (numrow<=" . ($limit[0] + $limit[1]) . ")";
} else {
$limitStr = "(numrow>0 AND numrow<=" . $limit[0] . ")";
}
}
return $limitStr ? ' WHERE ' . $limitStr : '';
}
/**
* 设置锁机制
* @access protected
* @param Query $query 查询对象
* @param bool|false $lock
* @return string
*/
protected function parseLock(Query $query, $lock = false)
{
if (!$lock) {
return '';
}
return ' FOR UPDATE NOWAIT ';
}
/**
* 字段和表名处理
* @access public
* @param Query $query 查询对象
* @param mixed $key 字段名
* @param bool $strict 严格检测
* @return string
*/
public function parseKey(Query $query, $key, $strict = false)
{
if (is_numeric($key)) {
return $key;
} elseif ($key instanceof Expression) {
return $key->getValue();
}
$key = trim($key);
if (strpos($key, '->') && false === strpos($key, '(')) {
// JSON字段支持
list($field, $name) = explode($key, '->');
$key = $field . '."' . $name . '"';
}
return $key;
}
/**
* 随机排序
* @access protected
* @param Query $query 查询对象
* @return string
*/
protected function parseRand(Query $query)
{
return 'DBMS_RANDOM.value';
}
}