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115 rindas
3.1 KiB
115 rindas
3.1 KiB
<?php
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// +----------------------------------------------------------------------
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// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
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// +----------------------------------------------------------------------
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// | Copyright (c) 2006-2014 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\Driver;
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use Think\Db\Driver;
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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 Driver
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{
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/**
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* 解析pdo连接的dsn信息
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* @access public
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* @param array $config 连接信息
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* @return string
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*/
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protected function parseDsn($config)
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{
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$dsn = 'sqlite:' . $config['database'];
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return $dsn;
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}
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/**
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* 取得数据表的字段信息
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* @access public
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* @return array
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*/
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public function getFields($tableName)
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{
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list($tableName) = explode(' ', $tableName);
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$result = $this->query('PRAGMA table_info( ' . $tableName . ' )');
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$info = array();
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if ($result) {
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foreach ($result as $key => $val) {
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$info[$val['name']] = array(
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'name' => $val['name'],
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'type' => $val['type'],
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'notnull' => (bool) (1 === $val['notnull']),
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'default' => $val['dflt_value'],
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'primary' => '1' == $val['pk'],
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'autoinc' => false,
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);
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}
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}
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return $info;
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}
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/**
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* 取得数据库的表信息
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* @access public
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* @return array
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*/
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public function getTables($dbName = '')
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{
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$result = $this->query("SELECT name FROM sqlite_master WHERE type='table' "
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. "UNION ALL SELECT name FROM sqlite_temp_master "
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. "WHERE type='table' ORDER BY name");
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$info = array();
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foreach ($result as $key => $val) {
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$info[$key] = current($val);
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}
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return $info;
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}
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/**
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* SQL指令安全过滤
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* @access public
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* @param string $str SQL指令
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* @return string
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*/
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public function escapeString($str)
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{
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return str_ireplace("'", "''", $str);
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}
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/**
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* limit
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* @access public
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* @return string
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*/
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public function parseLimit($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 .= ' 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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