gbase中union all导致末尾多出空格的坑

执行如下sql，发现数据末尾会莫名多出空格：

SELECT '222' AS GSDM FROM  dual
union all
SELECT 'test' AS GSDM FROM dual

gbase会自己处理数值长度小的那个常量，末尾会追加空格，直至和其他常量值的长度一致

SELECT trim('222') AS GSDM FROM  dual
union all
SELECT trim('test') AS GSDM FROM dual

使用union all时这样就不会处理空格