sql中起别名与hive中的区别

SQL中对列取别名，可如下应用：
SELECT user_type type FROM s_auction_auctions;
但Hive解析上述语句时，会提示：
FAILED: Parse Error: line 1:7 cannot recognize input 'user_type' in select expression
此时，应改为：
SELECT user_type AS type FROM s_auction_auctions;