添加了修改的具体内容

README.md

@@ -4,3 +4,50 @@
 ~~~
 composer require topthink/think-migration
 ~~~
+
+## 修改
+* Column的类型报错
+
+* PdoAdapter.php中的getColumnTypes方法中添加了smallinteger的数组内容，
+这里修改后可以过滤掉Column的类型报错
+* mysql的类型不支持报错
+* AdapterInterface.php中添加常量 const PHINX_TYPE_SMALL_INTEGER  = 'smallinteger';
+* MysqlAdapter.php中修改和添加getSqlType方法中的内容
+```
+   case static::PHINX_TYPE_INTEGER:
+       if ($limit && $limit >= static::INT_TINY) {
+           $sizes = array(
+               // Order matters! Size must always be tested from longest to shortest!
+               'bigint'    => static::INT_BIG,
+               'int'       => static::INT_REGULAR,
+               'mediumint' => static::INT_MEDIUM,
+               'smallint'  => static::INT_SMALL,
+               'tinyint'   => static::INT_TINY,
+           );
+           $limits = array(
+                // 修改部分开始########
+               'smallint'  => 5,
+                // 修改部分结束########
+               'int'       => 11,
+               'bigint'    => 20,
+           );
+           foreach ($sizes as $name => $length) {
+               if ($limit >= $length) {
+                   $def = array('name' => $name);
+                   if (isset($limits[$name])) {
+                       $def['limit'] = $limits[$name];
+                   }
+                   return $def;
+               }
+           }
+       } elseif (!$limit) {
+           $limit = 11;
+       }
+       return array('name' => 'int', 'limit' => $limit);
+       break;
+    // 后面是添加部分
+   case static::PHINX_TYPE_SMALL_INTEGER:
+       return array('name' => 'smallint', 'limit' => 5);
+       break;
+
+```