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187 lines
5.9 KiB
187 lines
5.9 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 PDO;
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use Think\Db\Driver;
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/**
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* Sqlsrv数据库驱动
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*/
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class Sqlsrv extends Driver
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{
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protected $selectSql = 'SELECT T1.* FROM (SELECT thinkphp.*, ROW_NUMBER() OVER (%ORDER%) AS ROW_NUMBER FROM (SELECT %DISTINCT% %FIELD% FROM %TABLE%%JOIN%%WHERE%%GROUP%%HAVING% %UNION%) AS thinkphp) AS T1 %LIMIT%%COMMENT%';
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// PDO连接参数
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protected $options = array(
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PDO::ATTR_CASE => PDO::CASE_LOWER,
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PDO::ATTR_ERRMODE => PDO::ERRMODE_EXCEPTION,
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PDO::ATTR_STRINGIFY_FETCHES => false,
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PDO::SQLSRV_ATTR_ENCODING => PDO::SQLSRV_ENCODING_UTF8,
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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 = 'sqlsrv:Database=' . $config['database'] . ';Server=' . $config['hostname'];
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if (!empty($config['hostport'])) {
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$dsn .= ',' . $config['hostport'];
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}
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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 = $this->query("SELECT column_name, data_type, column_default, is_nullable
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FROM information_schema.tables AS t
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JOIN information_schema.columns AS c
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ON t.table_catalog = c.table_catalog
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AND t.table_schema = c.table_schema
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AND t.table_name = c.table_name
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WHERE t.table_name = '$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['column_name']] = array(
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'name' => $val['column_name'],
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'type' => $val['data_type'],
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'notnull' => (bool) ('' === $val['is_nullable']), // not null is empty, null is yes
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'default' => $val['column_default'],
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'primary' => false,
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'autoinc' => false,
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);
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}
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}
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return $info;
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}
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/**
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* 取得数据表的字段信息
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* @access public
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* @return array
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*/
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public function getTables($dbName = '')
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{
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$result = $this->query("SELECT TABLE_NAME
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FROM INFORMATION_SCHEMA.TABLES
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WHERE TABLE_TYPE = 'BASE TABLE'
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");
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$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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* order分析
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* @access protected
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* @param mixed $order
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* @return string
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*/
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protected function parseOrder($order)
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{
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return !empty($order) ? ' ORDER BY ' . $order : ' ORDER BY rand()';
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}
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/**
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* 字段和表名处理
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* @access public
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* @param string $key
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* @param bool $strict
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* @return string
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*/
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public function parseKey($key, $strict = false)
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{
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$key = trim($key);
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if ($strict && !preg_match('/^[\w\.\*]+$/', $key)) {
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E('not support data:' . $key);
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}
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if ($strict || (!is_numeric($key) && !preg_match('/[,\'\"\*\(\)\[.\s]/', $key))) {
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$key = '[' . $key . ']';
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}
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return $key;
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}
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/**
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* limit
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* @access public
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* @param mixed $limit
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* @return string
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*/
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public function parseLimit($limit)
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{
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if (empty($limit)) {
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return '';
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}
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$limit = explode(',', $limit);
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if (count($limit) > 1) {
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$limitStr = '(T1.ROW_NUMBER BETWEEN ' . $limit[0] . ' + 1 AND ' . $limit[0] . ' + ' . $limit[1] . ')';
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} else {
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$limitStr = '(T1.ROW_NUMBER BETWEEN 1 AND ' . $limit[0] . ")";
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}
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return 'WHERE ' . $limitStr;
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}
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/**
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* 更新记录
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* @access public
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* @param mixed $data 数据
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* @param array $options 表达式
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* @return false | integer
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*/
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public function update($data, $options)
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{
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$this->model = $options['model'];
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$this->parseBind(!empty($options['bind']) ? $options['bind'] : array());
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$sql = 'UPDATE '
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. $this->parseTable($options['table'])
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. $this->parseSet($data)
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. $this->parseWhere(!empty($options['where']) ? $options['where'] : '')
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. $this->parseLock(isset($options['lock']) ? $options['lock'] : false)
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. $this->parseComment(!empty($options['comment']) ? $options['comment'] : '');
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return $this->execute($sql, !empty($options['fetch_sql']) ? true : false);
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}
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/**
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* 删除记录
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* @access public
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* @param array $options 表达式
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* @return false | integer
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*/
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public function delete($options = array())
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{
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$this->model = $options['model'];
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$this->parseBind(!empty($options['bind']) ? $options['bind'] : array());
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$sql = 'DELETE FROM '
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. $this->parseTable($options['table'])
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. $this->parseWhere(!empty($options['where']) ? $options['where'] : '')
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. $this->parseLock(isset($options['lock']) ? $options['lock'] : false)
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. $this->parseComment(!empty($options['comment']) ? $options['comment'] : '');
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return $this->execute($sql, !empty($options['fetch_sql']) ? true : false);
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}
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}
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