ymww_backend/thinkphp/library/think/db/builder/Mysql.php

137 lines
4.5 KiB

<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Copyright (c) 2006~2018 http://thinkphp.cn All rights reserved.
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------
namespace think\db\builder;
use think\db\Builder;
use think\Exception;
/**
* mysql数据库驱动
*/
class Mysql extends Builder
{
protected $insertAllSql = '%INSERT% INTO %TABLE% (%FIELD%) VALUES %DATA% %COMMENT%';
protected $updateSql = 'UPDATE %TABLE% %JOIN% SET %SET% %WHERE% %ORDER%%LIMIT% %LOCK%%COMMENT%';
/**
* 生成insertall SQL
* @access public
* @param array $dataSet 数据集
* @param array $options 表达式
* @param bool $replace 是否replace
* @return string
* @throws Exception
*/
public function insertAll($dataSet, $options = [], $replace = false)
{
// 获取合法的字段
if ('*' == $options['field']) {
$fields = array_keys($this->query->getFieldsType($options['table']));
} else {
$fields = $options['field'];
}
foreach ($dataSet as $data) {
foreach ($data as $key => $val) {
if (!in_array($key, $fields, true)) {
if ($options['strict']) {
throw new Exception('fields not exists:[' . $key . ']');
}
unset($data[$key]);
} elseif (is_null($val)) {
$data[$key] = 'NULL';
} elseif (is_scalar($val)) {
$data[$key] = $this->parseValue($val, $key);
} elseif (is_object($val) && method_exists($val, '__toString')) {
// 对象数据写入
$data[$key] = $val->__toString();
} else {
// 过滤掉非标量数据
unset($data[$key]);
}
}
$value = array_values($data);
$values[] = '( ' . implode(',', $value) . ' )';
if (!isset($insertFields)) {
$insertFields = array_map([$this, 'parseKey'], array_keys($data));
}
}
return str_replace(
['%INSERT%', '%TABLE%', '%FIELD%', '%DATA%', '%COMMENT%'],
[
$replace ? 'REPLACE' : 'INSERT',
$this->parseTable($options['table'], $options),
implode(' , ', $insertFields),
implode(' , ', $values),
$this->parseComment($options['comment']),
], $this->insertAllSql);
}
/**
* 字段和表名处理
* @access protected
* @param mixed $key
* @param array $options
* @return string
*/
protected function parseKey($key, $options = [], $strict = false)
{
if (is_numeric($key)) {
return $key;
} elseif ($key instanceof Expression) {
return $key->getValue();
}
$key = trim($key);
if (strpos($key, '$.') && false === strpos($key, '(')) {
// JSON字段支持
list($field, $name) = explode('$.', $key);
return 'json_extract(' . $field . ', \'$.' . $name . '\')';
} elseif (strpos($key, '.') && !preg_match('/[,\'\"\(\)`\s]/', $key)) {
list($table, $key) = explode('.', $key, 2);
if ('__TABLE__' == $table) {
$table = $this->query->getTable();
}
if (isset($options['alias'][$table])) {
$table = $options['alias'][$table];
}
}
if ($strict && !preg_match('/^[\w\.\*]+$/', $key)) {
throw new Exception('not support data:' . $key);
}
if ('*' != $key && ($strict || !preg_match('/[,\'\"\*\(\)`.\s]/', $key))) {
$key = '`' . $key . '`';
}
if (isset($table)) {
if (strpos($table, '.')) {
$table = str_replace('.', '`.`', $table);
}
$key = '`' . $table . '`.' . $key;
}
return $key;
}
/**
* 随机排序
* @access protected
* @return string
*/
protected function parseRand()
{
return 'rand()';
}
}