sql语句异常

[whiteS18]

异常位置：\roo\src\main\java\social\roo\service\TopicService.java

public TopicDetailDto getTopicDetail(String tid) { String sql = "select a.tid, a.title, a.content, a.username, a.text_type as textType, b.avatar," + "a.node_slug as nodeSlug, a.node_title as nodeTitle," + "a.comments, a.created, b.avatar" + " from roo_topic a left join roo_user b on a.username = b.username" + " where a.tid = ?"; Database error: Unknown column 'a.text_type' in 'field list'