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83 lines
2.2 KiB
83 lines
2.2 KiB
4 years ago
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<?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) 2006~2018 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\Builder;
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/**
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* Sqlite数据库驱动
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*/
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class Sqlite extends Builder
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{
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/**
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* limit
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* @access public
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* @param string $limit
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* @return string
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*/
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public function parseLimit($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 .= ' LIMIT ' . $limit[1] . ' OFFSET ' . $limit[0] . ' ';
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} else {
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$limitStr .= ' LIMIT ' . $limit[0] . ' ';
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}
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}
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return $limitStr;
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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 'RANDOM()';
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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 mixed $key
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* @param array $options
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* @return string
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*/
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protected function parseKey($key, $options = [], $strict = false)
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{
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if (is_numeric($key)) {
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return $key;
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} elseif ($key instanceof Expression) {
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return $key->getValue();
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}
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$key = trim($key);
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if (strpos($key, '.')) {
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list($table, $key) = explode('.', $key, 2);
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if ('__TABLE__' == $table) {
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$table = $this->query->getTable();
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}
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if (isset($options['alias'][$table])) {
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$table = $options['alias'][$table];
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}
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}
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if (isset($table)) {
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$key = $table . '.' . $key;
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}
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return $key;
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}
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}
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