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

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+<?php
+// +----------------------------------------------------------------------
+// | ThinkPHP [ WE CAN DO IT JUST THINK ]
+// +----------------------------------------------------------------------
+// | Copyright (c) 2006~2017 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;
+
+/**
+ * mysql数据库驱动
+ */
+class Mysql extends Builder
+{
+    protected $updateSql = 'UPDATE %TABLE% %JOIN% SET %SET% %WHERE% %ORDER%%LIMIT% %LOCK%%COMMENT%';
+
+    /**
+     * 字段和表名处理
+     * @access protected
+     * @param string $key
+     * @param array  $options
+     * @return string
+     */
+    protected function parseKey($key, $options = [])
+    {
+        $key = trim($key);
+        if (strpos($key, '$.') && false === strpos($key, '(')) {
+            // JSON字段支持
+            list($field, $name) = explode('$.', $key);
+            $key                = '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 (!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()';
+    }
+
+}