Firebird.class.php
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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK IT ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006-2014 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
namespace Think\Db\Driver;
use Think\Db\Driver;
/**
* Firebird数据库驱动
*/
class Firebird extends Driver
{
protected $selectSql = 'SELECT %LIMIT% %DISTINCT% %FIELD% FROM %TABLE%%JOIN%%WHERE%%GROUP%%HAVING%%ORDER%';
/**
* 解析pdo连接的dsn信息
*
* @access public
* @param array $config
* 连接信息
* @return string
*/
protected function parseDsn($config)
{
$dsn = 'firebird:dbname=' . $config['hostname'] . '/' . ($config['hostport'] ? : 3050) . ':' . $config['database'];
return $dsn;
}
/**
* 执行语句
*
* @access public
* @param string $str
* sql指令
* @param boolean $fetchSql
* 不执行只是获取SQL
* @return mixed
*/
public function execute($str, $fetchSql = false)
{
$this->initConnect(true);
if (! $this->_linkID) {
return false;
}
$this->queryStr = $str;
if (! empty($this->bind)) {
$that = $this;
$this->queryStr = strtr($this->queryStr, array_map(function ($val) use($that)
{
return '\'' . $that->escapeString($val) . '\'';
}, $this->bind));
}
if ($fetchSql) {
return $this->queryStr;
}
// 释放前次的查询结果
if (! empty($this->PDOStatement)) {
$this->free();
}
$this->executeTimes ++;
N('db_write', 1); // 兼容代码
// 记录开始执行时间
$this->debug(true);
$this->PDOStatement = $this->_linkID->prepare($str);
if (false === $this->PDOStatement) {
E($this->error());
}
foreach ($this->bind as $key => $val) {
if (is_array($val)) {
$this->PDOStatement->bindValue($key, $val[0], $val[1]);
} else {
$this->PDOStatement->bindValue($key, $val);
}
}
$this->bind = array();
$result = $this->PDOStatement->execute();
$this->debug(false);
if (false === $result) {
$this->error();
return false;
} else {
$this->numRows = $this->PDOStatement->rowCount();
return $this->numRows;
}
}
/**
* 取得数据表的字段信息
*
* @access public
*/
public function getFields($tableName)
{
$this->initConnect(true);
list ($tableName) = explode(' ', $tableName);
$sql = 'SELECT RF.RDB$FIELD_NAME AS FIELD,RF.RDB$DEFAULT_VALUE AS DEFAULT1,RF.RDB$NULL_FLAG AS NULL1,TRIM(T.RDB$TYPE_NAME) || \'(\' || F.RDB$FIELD_LENGTH || \')\' as TYPE FROM RDB$RELATION_FIELDS RF LEFT JOIN RDB$FIELDS F ON (F.RDB$FIELD_NAME = RF.RDB$FIELD_SOURCE) LEFT JOIN RDB$TYPES T ON (T.RDB$TYPE = F.RDB$FIELD_TYPE) WHERE RDB$RELATION_NAME=UPPER(\'' . $tableName . '\') AND T.RDB$FIELD_NAME = \'RDB$FIELD_TYPE\' ORDER By RDB$FIELD_POSITION';
$result = $this->query($sql);
$info = array();
if ($result) {
foreach ($result as $key => $val) {
$info[trim($val['field'])] = array(
'name' => trim($val['field']),
'type' => $val['type'],
'notnull' => (bool) ($val['null1'] == 1), // 1表示不为Null
'default' => $val['default1'],
'primary' => false,
'autoinc' => false
);
}
}
// 获取主键
$sql = 'select b.rdb$field_name as field_name from rdb$relation_constraints a join rdb$index_segments b on a.rdb$index_name=b.rdb$index_name where a.rdb$constraint_type=\'PRIMARY KEY\' and a.rdb$relation_name=UPPER(\'' . $tableName . '\')';
$rs_temp = $this->query($sql);
foreach ($rs_temp as $row) {
$info[trim($row['field_name'])]['primary'] = true;
}
return $info;
}
/**
* 取得数据库的表信息
*
* @access public
*/
public function getTables($dbName = '')
{
$sql = 'SELECT DISTINCT RDB$RELATION_NAME FROM RDB$RELATION_FIELDS WHERE RDB$SYSTEM_FLAG=0';
$result = $this->query($sql);
$info = array();
foreach ($result as $key => $val) {
$info[$key] = trim(current($val));
}
return $info;
}
/**
* SQL指令安全过滤
*
* @access public
* @param string $str
* SQL指令
* @return string
*/
public function escapeString($str)
{
return str_replace("'", "''", $str);
}
/**
* limit
*
* @access public
* @param $limit limit表达式
* @return string
*/
public function parseLimit($limit)
{
$limitStr = '';
if (! empty($limit)) {
$limit = explode(',', $limit);
if (count($limit) > 1) {
$limitStr = ' FIRST ' . $limit[1] . ' SKIP ' . $limit[0] . ' ';
} else {
$limitStr = ' FIRST ' . $limit[0] . ' ';
}
}
return $limitStr;
}
}