alter / drop column test
/**
onerror(continue,"don't support")
**/
;

alter / add column test varchar
/**
onerror(continue,"don't support")
**/
;

alter class / drop column test
/**
onerror(continue,"don't support")
**/
;

alter class / add column test varchar
/**
onerror(continue,"don't support")
**/
;

alter class /test drop column test
/**
onerror(continue,"Has subclass|or ValidFieldList")
**/
;

alter class /test add column test varchar
/**
onerror(continue,"already exist")
**/
;

alter /test/alter drop column altertest
/**
onerror(continue,"or ValidFieldList")
**/
;

alter /test/alter add column altertest varchar
;