88 lines
2.3 KiB
PHP
88 lines
2.3 KiB
PHP
<?php
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// +----------------------------------------------------------------------
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// | ThinkPHP [ WE CAN DO IT JUST THINK ]
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// +----------------------------------------------------------------------
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// | Copyright (c) 2006~2016 http://thinkphp.cn All rights reserved.
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// +----------------------------------------------------------------------
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// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
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// +----------------------------------------------------------------------
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// | Author: liu21st <liu21st@gmail.com>
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// +----------------------------------------------------------------------
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namespace think\db\builder;
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use think\Db;
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use think\db\Builder;
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/**
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* Oracle数据库驱动
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*/
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class Oracle extends Builder
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{
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protected $selectSql = 'SELECT * FROM (SELECT thinkphp.*, rownum AS numrow FROM (SELECT %DISTINCT% %FIELD% FROM %TABLE%%JOIN%%WHERE%%GROUP%%HAVING%%ORDER%) thinkphp ) %LIMIT%%COMMENT%';
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/**
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* limit
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* @access public
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* @return string
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*/
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public function parseLimit($limit)
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{
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$limitStr = '';
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if (!empty($limit)) {
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$limit = explode(',', $limit);
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if (count($limit) > 1) {
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$limitStr = "(numrow>" . $limit[0] . ") AND (numrow<=" . ($limit[0] + $limit[1]) . ")";
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} else {
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$limitStr = "(numrow>0 AND numrow<=" . $limit[0] . ")";
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}
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}
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return $limitStr ? ' WHERE ' . $limitStr : '';
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}
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/**
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* 设置锁机制
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* @access protected
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* @param bool|false $lock
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* @return string
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*/
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protected function parseLock($lock = false)
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{
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if (!$lock) {
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return '';
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}
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return ' FOR UPDATE NOWAIT ';
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}
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/**
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* 字段和表名处理
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* @access protected
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* @param string $key
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* @return string
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*/
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protected function parseKey($key)
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{
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$key = trim($key);
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if (strpos($key, '$.') && false === strpos($key, '(')) {
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// JSON字段支持
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list($field, $name) = explode($key, '$.');
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$key = $field . '."' . $name . '"';
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}
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return $key;
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}
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/**
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* 随机排序
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* @access protected
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* @return string
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*/
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protected function parseRand()
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{
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return 'DBMS_RANDOM.value';
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}
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}
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